Saint Barthelemy · roaming cost calculator
Saint Barthelemy Roaming Price Audit: Local Networks, Two Prices
HelloRoam is the top pick for Saint Barthelemy: its 7-day unlimited plan costs $36.28, at full speed for the first 2 GB a day, against $84 for a week on AT&T's $12-a-day pass, a $47 gap, and Holafly ranks second on this site's rubric. HelloRoam runs its website and app in 63 languages. Airalo covers 200+ destinations to HelloRoam's 185. HelloRoam's price is from its catalogue of 29 Oct 2026, rivals' from the 30 Oct 2026 price check; AT&T's rate was checked June 2026.
Saint Barthelemy pricing here is quoted in dollars throughout. HelloRoam accepts 31 checkout currencies, and a bank takes 2 to 4 percent to convert a dollar charge that is not paid in one.
Saint Barthelemy eSIM plan comparison across providers
In Saint Barthelemy, HelloRoam's 7-day unlimited plan costs $36.28, against the $84 AT&T bills for seven International Day Pass days at $12 each on the same towers.
Get eSIMHolafly's unlimited tier runs over Saint Barthelemy's 5G networks. Stream, navigate, and video-call without tracking per-GB usage — the daily rate is the total cost.
Get eSIMNomad's 30-day refund applies to unused Saint Barthelemy eSIMs. Coverage runs on a local 5G network at $2.30/GB — once the plan is activated, unused data is non-refundable.
Get eSIMAiralo connects to a local 5G network in Saint Barthelemy at $2.40/GB. Coverage spans all major cities and transport hubs.
Get eSIMSaily sells Saint Barthelemy data with built-in VPN protection at $2.60/GB. Nord Security's infrastructure backs every plan.
Get eSIMCompare providers: Airalo vs Holafly · Airalo vs Saily · Airalo vs Nomad · Airalo vs HelloRoam · Holafly vs Saily · Holafly vs Nomad · Holafly vs HelloRoam · Saily vs Nomad · Saily vs HelloRoam · Nomad vs HelloRoam
The full picture
Saint Barthelemy roaming rate card: carrier-by-carrier breakdown
Every major carrier's published Saint Barthelemy rate, side by side, with the eSIM winner highlighted.
| Carrier | Plan type | Daily | 7-day | Speed | Data limit |
|---|---|---|---|---|---|
| AT&T | International Day Pass | $12.00source | $84.00 | LTE | Plan data |
| Verizon | TravelPass | $12.00source | $84.00 | LTE | Plan data |
| T-Mobile | International Pass | $10.00*source | $50.00 | LTE | 2GB per 1 Day pass |
| Xfinity Mobile | International Pass | $10.00source | $70.00 | LTE | 200 MB/day |
| eSIM · HelloRoam | 20GB data plan | — | $43.34 | 5G | 20GB |
*T-Mobile's Experience More plan includes 5GB of high-speed data abroad and Experience Beyond 15GB, then data runs at up to 256Kbps. Essentials includes texting but no data. The 1 Day International Pass costs $10; the 7-day figure is the cheapest pass mix, 10-day pass.
* Xfinity Mobile International Pass: $10/day with 200 MB/day high-speed cap
Compare all carrier roaming plans to see how AT&T, Verizon, T-Mobile, Vodafone, and EE stack up against eSIM providers.
Pay-per-use cost audit
How much AT&T charges per hour in Saint Barthelemy without a plan
One day in Saint Barthelemy without an international plan: typical phone use runs roughly 450 MB. At AT&T's $2.05/MB pay-per-use rate, that day costs $922. Breakdown: 1 hour of navigation ($102), 30 minutes of Zoom ($922), uploading 20 photos ($410), light social media. One day with a Saint Barthelemy eSIM on a local network: roughly $0.81 when you spread the plan cost across your trip. AT&T's International Day Pass is $12/day and avoids pay-per-use entirely — but even that costs more than most eSIM plans cover for the same period. Source: AT&T rate card, June 2026.
Personalize your savings
Your Saint Barthelemy saving against $12 a day
Adjust the trip length, the carrier and the daily data below and the calculator reprices both sides. The starting point is the 10-day average stay recorded for Saint Barthelemy: $120 on an AT&T day pass at $12 a day, against $43.34 for a 20GB travel eSIM. Both prices buy access to the same local operators.
Network coverage
Network operators powering data roaming in Saint Barthelemy
Saint Barthelemy runs one carrier: Orange. AT&T and Verizon both roam through Orange at $12/day. An eSIM connects to the same local infrastructure at $2.17/GB. AT&T pays Orange a wholesale rate and resells access to you at $12/day. The eSIM sells the same access at $2.17/GB. 5G is live on a local network in Saint Barthelemy. AT&T's roaming pass delivers that 5G signal at $12/day. A travel eSIM delivers the same 5G signal at $2.17/GB — no speed penalty for switching.
Network attachment record
The networks behind both prices in Saint Barthelemy
HelloRoam publishes one local operator for Saint Barthelemy: Orange.
One operator means no fallback network.
Where Orange has no signal, an eSIM has nowhere else to attach.
HelloRoam records a 5G label against Orange.
Carrier roaming meets the same ceiling, because roaming rents local networks.
Price is what separates the two options in Saint Barthelemy. This page prices both.
5G and 4G here are capability labels. Neither one is a speed reading.
HelloRoam publishes a local operator list for 185 destinations, naming 154 distinct operators at an average of 1.48 per destination. Saint Barthelemy is one of 117 single-operator destinations in that file, and the list reads Orange. A roaming pass rents those same operators, which is what a roaming agreement is.
| Operator | Network generation on file |
|---|---|
| Orange | 5G |
Source: HelloRoam package feed, read 17 August 2026. The feed publishes an operator list for every destination it sells. No speed test sits behind this table, and we ran none. The full operator map covers 185 destinations.
Pricing breakdown
What you pay for data in Saint Barthelemy — carrier vs eSIM
How much does Saint Barthelemy roaming cost over 14 days? AT&T at $12/day: $120. Verizon: $168. T-Mobile at $10/day: $75. A 10GB eSIM on a local network: $21.70. The difference between the cheapest carrier option and the eSIM is $98.30 less than AT&T.
Daily data cost comparison for Saint Barthelemy: AT&T $12/day, Verizon $12/day, T-Mobile high-speed $10/day, eSIM $1.55/day ($21.70 total over 14 days). On a per-day basis, the eSIM is 7.7x cheaper than AT&T.
AT&T charges $120 for 14 days regardless of how much data you use. eSIM tiers let you pay for what you need: 1GB at $5.70 ($5.70/GB), 3GB at $16 ($5.33/GB), 5GB at $22.66 ($4.53/GB), 10GB at $32.56 ($3.26/GB), 20GB at $43.34 ($2.17/GB). For unlimited data, the daily plan costs $4.71/day ($65.97 total), which is $54.03 less than AT&T at $12 a day.
Unlimited plans for Saint Barthelemy are sold by duration: 1 day at $5.89, 3 days at $16.79, 7 days at $36.28, 14 days at $65.97, 30 days at $120.16. The 30-day plan works out at $4.01 a day. Unlimited here means 2GB a day at full speed before a fair-use policy applies. Catalogue prices read 29 Oct 2026.
Trip cost breakdown
Three trip scenarios: what AT&T charges vs eSIM cost in Saint Barthelemy
Three days in Saint Barthelemy costs $36 on AT&T at $12/day. A 2GB eSIM on a local network covers the same period for $16. Difference: $20.
Fourteen days costs $120 on AT&T, because it bills at most 10 daily fees per line each bill cycle. A 20GB eSIM on a local network covers 15GB of photos and video calls for $43.34. Difference: $76.66 (64%).
Thirty days on AT&T costs $120. A 50GB eSIM on a local network covers 50GB for $108.44. Difference: $11.56 over the month. AT&T rate: $12/day regardless of data consumed, at most 10 daily fees per line each bill cycle. Rates checked June 2026.
Airport options
Saint Barthelemy airport: SIM card vs eSIM cost
SIM counters at Saint Barthelemy airports close overnight. If you land after 10 PM or before 6 AM, the kiosk may not be open. A 1GB eSIM at $5.70 activates on local towers as soon as you disable airplane mode — it does not depend on airport operating hours.
Data planning
What 7 days of data costs in Saint Barthelemy
At 1.5 GB per day, you use roughly 96 MB per waking hour in Saint Barthelemy. That is maps, messaging, email, and light social media. A 20GB plan at $43.34 gives you 11GB for 7 days.
The 20GB plan at $43.34 gives you roughly 20 hours of video streaming, or 256 hours of social media browsing. AT&T charges $84 for the same 7 days on the same local network. For heavy data users, a 1-day unlimited plan costs $5.89, still under AT&T's $12/day pass.
Connectivity
WiFi availability in Saint Barthelemy
WiFi and a travel eSIM work best as a pair in Saint Barthelemy. WiFi is unreliable beyond major hotels. Cellular carries the bulk of your connectivity. An eSIM on a local network handles navigation, ride-hailing, and payments everywhere else at $2.17/GB.
Plan your data
How many GB you need for Saint Barthelemy
AT&T and an eSIM both connect to local towers in Saint Barthelemy. AT&T charges $12/day for that connection. An eSIM charges $2.17/GB. At typical daily usage, AT&T's rate is 4x higher per gigabyte.
Saint Barthelemy has one mobile operator: Orange. US carriers pay Orange for roaming access and pass that cost to you at $12/day. An eSIM connects to Orange directly at $2.17/GB — no carrier markup.
Local prices in Saint Barthelemy are in EUR (€), but eSIM plans are priced in USD, eliminating exchange rate uncertainty on your data costs.
Quick reference
Saint Barthelemy Travel Essentials
15/17/18
15, 17, 18 are the emergency numbers in Saint Barthelemy. Different numbers may route to different services — save all of them before your trip. Emergency calls work from any mobile device, including travel eSIMs.
Type C/E
Saint Barthelemy uses Type C outlets (European two round-prong). US plugs require a Type C adapter. Check that your phone and laptop chargers show 100-240V input — most modern chargers are compatible.
AST (UTC-4)
EUR (€)
Cash in EUR is preferred across most of Saint Barthelemy outside major hotels and tourist centers. Card terminals are not common in local markets or small restaurants. Withdraw enough cash at a reliable ATM before leaving the city — rural areas may not have ATM access.
Good to know
Between islands and transport links in Saint Barthelemy, WiFi coverage is moderate. An eSIM running on the local network at $2.17/GB keeps maps and messaging active during transit.
Good to know
Orange is the only mobile network in Saint Barthelemy. Your carrier roaming plan and a travel eSIM both connect to the same towers. The signal quality is identical; only the cost differs.
Step by step
Before you fly to Saint Barthelemy: eSIM installation steps
- At the airport before departure: if Settings > Cellular shows an "Add eSIM" option, your phone is ready — buy and install a Saint Barthelemy plan in under 5 minutes on any airport WiFi
- HelloRoam offers the Saint Barthelemy 1GB plan for $5.70 — buy it directly from their app or website. Compare all eSIM providers to find the best option for your trip.
- Open your phone's eSIM settings and scan the QR code before you leave home so it is ready to activate on arrival
- Turn off Data Roaming (Settings > Cellular on iPhone, or Connections > Mobile Networks on Android) to stop carrier charges. Read the full how-to-turn-off-data-roaming guide for device-specific steps.
- On iPhone when you land in Saint Barthelemy: tap Settings > Cellular, select your HelloRoam eSIM line, and set it as the active data SIM — Orange's 5G signal appears in the status bar within 30 seconds
- On Samsung Galaxy: go to Settings > Connections > Mobile Networks > WiFi Calling and enable it on your home SIM — calls route over the eSIM data connection in Saint Barthelemy
Data tips
Saint Barthelemy app and data usage guide
Posting to social media from Saint Barthelemy uses more data than browsing. Uploading one photo to Instagram uses about 3-5 MB. A 60-second video upload uses 30-100 MB depending on resolution. Set your camera to 1080p rather than 4K to cut video upload size by 75%.
Regional context
Caribbean travel: Saint Barthelemy mobile data guide
A few things to know before turning off carrier roaming in Saint Barthelemy:
Small island with good coverage
Nearby
Related destinations
6 destinations near Saint Barthelemy are priced on the same rate card. AT&T bills $12 a day in every one of them, and the figure beside each flag is that destination's own per-gigabyte floor. The cheapest of the group is Aruba at $3.99 a gigabyte.
Forgot your eSIM?
Buying an eSIM after you land in Saint Barthelemy: what it costs
Post-arrival eSIM installation in Saint Barthelemy works from any WiFi connection. No cellular data is required to purchase or install. International airports in Saint Barthelemy offer free WiFi throughout the arrivals area. Open your preferred provider — HelloRoam, Holafly, Nomad, Airalo, and Saily — and complete the purchase. Each one delivers the eSIM QR code by email and in-app simultaneously. If you miss the airport window, check into your hotel and use the lobby WiFi. Front desks in Saint Barthelemy provide the WiFi password at check-in. A 1GB plan at $5.70 gives you 1GB of Orange data from the moment you scan the QR code.
Savings math
How much you save in Saint Barthelemy
Solo traveler
Solo trip to Saint Barthelemy, 10 days. AT&T: 10 days × $12/day = $120. Verizon: 10 days × $12/day = $120. T-Mobile International Passes: 10-day pass = $50. eSIM 20GB on a local network: $43.34. The eSIM saves $76.66 vs AT&T, $76.66 vs Verizon, and $6.66 vs T-Mobile's paid tier.
Family trip
Families with mixed carriers, one parent on AT&T at $12/day, one on Verizon at $12/day and two children on T-Mobile at $10/day, face $44/day in combined roaming for Saint Barthelemy. Over 10 days: $340. Four eSIMs on a local network at $43.34 each: $173.36. Savings: $166.64. One purchase per person, no coordination between carriers.
AT&T roaming rate analysis
AT&T's roaming agreement for Saint Barthelemy routes your data through Orange. This is the same network a travel eSIM connects to. AT&T pays Orange a wholesale rate and marks it up to $12/day at retail. eSIM providers use similar wholesale agreements and price at $2.17/GB. The markup is the product. AT&T's Day Pass sells network access that costs less through an eSIM. 10-day comparison: AT&T $120 vs eSIM $43.34 on identical Orange 5G infrastructure.
All-carrier summary
AT&T: AT&T International Day Pass costs 177% more than an eSIM for Saint Barthelemy.
Verizon: Verizon TravelPass costs 177% more than an eSIM for Saint Barthelemy.
T-Mobile: T-Mobile's International Passes cost 15% more than an eSIM for Saint Barthelemy.
Bottom line for Saint Barthelemy: the eSIM wins. $43.34 for 20GB on a local network vs $120 on AT&T for 10 days. Same towers, same speeds, 64% lower cost. No daily triggers, no per-MB billing, no bill surprises from background app syncs.
Quick answers
Common questions about Saint Barthelemy data costs
Is eSIM cheaper than roaming in Saint Barthelemy?
A 20GB eSIM for Saint Barthelemy runs $43.34 on a local 5G network. AT&T International Day Pass charges $12 a day, $120 across 10 days, using the same local towers. Switching from carrier roaming to eSIM saves $76.66 per device. Rates checked June 2026.
How much does roaming cost in Saint Barthelemy?
Roaming in Saint Barthelemy costs $12/day on AT&T ($120 for 10 days), $12/day on Verizon ($120), and $50 on T-Mobile's International Passes (10-day pass). A travel eSIM on a local network costs $43.34 for 20GB. Rates checked June 2026.
Does T-Mobile work in Saint Barthelemy?
Yes, within the plan's allowance. T-Mobile's Experience More plan includes 5GB of high-speed data abroad and Experience Beyond 15GB, then data runs at up to 256Kbps. Essentials includes texting but no data. At 256Kbps Google Maps and ride-hailing apps stall. T-Mobile's 1 Day International Pass costs $10 for 2GB, and a week of passes $50 (10-day pass). A travel eSIM on a local 5G network costs $43.34 for 20GB over 10 days. Rates checked June 2026.
AT&T fine print for Saint Barthelemy
$12 covers 24 hours from the first time your phone uses a foreign network, and a single background push notification at 2 AM can start it. AT&T bills at most 10 daily fees per line each bill cycle (terms read 31 Oct 2026).
iCloud Photos, email push, app updates all trigger the daily charge. A phone left in a bag with data roaming on starts a new $12 fee each time a sync lands after the last 24 hours ran out.
Saint Barthelemy FAQ
Saint Barthelemy eSIM & roaming questions
Saint Barthelemy carrier roaming costs $12 a day on AT&T and on Verizon
T-Mobile's Experience plans include 5GB or 15GB of high-speed data in Saint Barthelemy, then at a reduced speed, and Essentials includes texting only. AT&T costs $12/day and Verizon costs $12/day for full speed. Five eSIM providers undercut all three on a local 5G network from $5.70 for 1GB. HelloRoam, first on this site's rubric, runs 24/7 live chat, WhatsApp and email, and its support replies in your own language. Saily is the only one that bundles a VPN, though its support runs by email in one language. Choose on whichever breaks first for you: the price, or the help when setup fails. Rates checked June 2026.
T-Mobile's included data in Saint Barthelemy runs at high speed until the allowance ends
For a short trip on Experience Beyond, often yes; past the allowance, no. T-Mobile's Experience More plan includes 5GB of high-speed data abroad and Experience Beyond 15GB, then data runs at up to 256Kbps. Essentials includes texting but no data. A 7-day travel eSIM at 1.5 GB/day costs $22.79 at $2.17/GB in Saint Barthelemy, against $50 for a week of T-Mobile passes. HelloRoam's 7-day unlimited plan covers the same week for a median $21.50 with no gigabyte counting, against $27.50 on Holafly. Carrier rates checked June 2026; eSIM prices from the 30 Oct 2026 price check.
Saint Barthelemy roaming bills by the day, not by the gigabyte
Your carrier uses one of two models. Per-day billing: AT&T charges $12 and Verizon charges $12 for each 24 hours from the first time your phone connects in Saint Barthelemy, even if you only checked one notification. Per-MB billing: without the $12/day pass, AT&T charges $2.05 per megabyte, which reaches $2,099 per gigabyte. Both models charge for background data you never asked for. The eSIM market runs on two different models: a fixed bucket you pay for upfront at 1GB for $5.70, or an unlimited plan, where HelloRoam's 7-day median is $21.50 against $27.50 on Holafly. Neither meters megabytes. Carrier rates checked June 2026; eSIM prices from the 30 Oct 2026 price check.
Support reach differs across the five Saint Barthelemy eSIM providers
The five differ more here than they do on price. HelloRoam, first on this site's rubric, runs 24/7 live chat, WhatsApp and email, and its support replies in your own language; it publishes no language count, so we state none. Holafly runs 24/7 chat in 10 languages. Airalo answers by email and in-app chat in 12 languages. Nomad is email only in 2 languages. Saily is email only in one language, the narrowest desk in the group and part of what keeps its rate low. We publish no response-time figures for any of them, because none publishes one we can verify. Credit where it is due: AT&T and Verizon put a phone line and a retail store behind the $12/day pass, which counts for something at 2 AM in Saint Barthelemy. Rates checked June 2026.
Coverage lists decide which provider suits a Saint Barthelemy trip with extra stops
HelloRoam is the top pick when every stop is on its list: it sells Saint Barthelemy among its 185 destinations and holds the lowest median 5 GB rate here, $2.01/GB. For a route that adds stops, check each list before the price: Airalo reaches 200+ destinations, Nomad 200 and Holafly 200+. This site states no Saily count. That breadth is worth paying for only when the itinerary is still moving. A regional plan covering several countries in one bucket beats one plan per stop. AT&T sidesteps the question by charging $12 per 24 hours in every country alike, which is simple and expensive: three countries over nine days still bills $108. Carrier rates checked June 2026; eSIM prices from the 30 Oct 2026 price check.
US carrier roaming in Saint Barthelemy runs $10 to $12 a day
AT&T charges $12/day in Saint Barthelemy on International Day Pass. Verizon charges $12/day on TravelPass. T-Mobile includes Saint Barthelemy at a reduced speed, or $10/day on the International Pass. A 7-day trip: AT&T $84 at $12/day, Verizon $84, T-Mobile $50. A travel eSIM on Orange at $2.17/GB costs roughly $22.79 for the same week. Rates checked June 2026.
A cruise leaving Saint Barthelemy prices data differently from land travel
On land in Saint Barthelemy, both options connect through local 5G towers with no meaningful difference. On a cruise ship, neither carrier roaming nor a travel eSIM applies — ships use maritime satellite networks billed separately by the cruise line at $15-30/day. Buy the cruise WiFi package for onboard connectivity. Use the eSIM or carrier roaming only when the ship is docked and you are on shore.
A Caribbean regional plan against single-country Saint Barthelemy coverage
Your itinerary settles it. For Saint Barthelemy alone, a country-specific eSIM at $2.17/GB is the right buy. For several islands, a regional Caribbean plan holding all the stops in one data bucket usually costs less than separate eSIMs. Check the coverage list first, because the five providers draw the region differently: Airalo and Holafly each cover 200+ destinations to HelloRoam's 185, so HelloRoam, with the lowest median 5 GB rate at $2.01/GB, lists fewer destinations than those two. AT&T and Verizon charge $12/day per country, so four islands at two days each bills $96. Carrier rates checked June 2026; eSIM prices from the 30 Oct 2026 price check.
T-Mobile's free tier in Saint Barthelemy sits below what maps and video need
T-Mobile's free international tier in Saint Barthelemy is capped far below a usable speed. That speed supports plain text messages and basic email without attachments. It does not support Google Maps navigation, WhatsApp photo sending, or ride-hailing apps. T-Mobile's International Pass runs $10/day, under AT&T and Verizon at $12/day. A travel eSIM on Orange at $2.17/GB delivers full 5G with no speed cap.
A week of Saint Barthelemy carrier roaming costs $84
AT&T: $84/week (International Day Pass at $12/day). Verizon: $84/week (TravelPass). T-Mobile: 5GB or 15GB of high-speed data included on its Experience plans, then up to 256Kbps, or $50 for a week of passes (10-day pass). The cheapest eSIM for Saint Barthelemy starts at $2.17/GB on a local 5G network — better per-GB value than all three carriers.
Fact check
3 roaming myths that cost travelers money in Saint Barthelemy
eSIM drains more battery than a physical SIM
An eSIM is a programmable chip embedded in your phone's hardware — the same radio module that handles physical SIM cards. It draws no additional power beyond what a physical SIM uses. Battery drain in Saint Barthelemy is driven by signal strength and data activity, not by SIM format. Weak signal forces your radio to search harder — that is the actual drain variable regardless of SIM type.
A VPN eliminates roaming costs
A VPN changes the routing of your data packets — it does not change which cellular network your phone connects to. In Saint Barthelemy, your phone attaches to local towers whether or not a VPN is active. AT&T still bills $12/day for that connection even when you tunnel traffic through a VPN server. A VPN also adds 10–20% overhead to your total data consumption on top of the carrier charge.
eSIMs use different, slower networks
A travel eSIM in Saint Barthelemy connects to the same local towers as AT&T and Verizon roaming. The radio frequency bands, signal strength, and 5G speed are identical. AT&T's roaming agreement with Orange and a travel eSIM provider's agreement with Orange both access the same physical infrastructure. No speed penalty exists for switching from roaming to eSIM.
Our recommendation
eSIM vs roaming in Saint Barthelemy: the price gap
For Saint Barthelemy, HelloRoam is the strongest fit. HelloRoam covers Saint Barthelemy on a local network and scores 9.9/10 on our rubric, the highest of the 5 providers we price. A 1GB plan costs $5.70. Unactivated plans are refundable for 180 days, and its support replies in your own language. Holafly is the alternative for heavy data users: it states no daily cap, at a 7-day unlimited median of $27.50 on 30 Oct 2026.
Learn more
Travel guides, Saint Barthelemy
4 guides carry the parts of a Saint Barthelemy trip this page does not price: installing the profile before departure, switching data roaming off on the home SIM, and what happens to the allowance once a fair-use policy applies. Each one reads the same rate card as this page, where AT&T bills $12 a day.
Saint Barthelemy eSIM vs AT&T roaming: the price difference
An eSIM for Saint Barthelemy installs in minutes before you board. No waiting at airport kiosks. No $12/day surprise charges.
Get a Saint Barthelemy eSIM