Saint Barthelemy · roaming cost calculator
Saint Barthelemy Data Bill Audit: Roaming Rates vs eSIM Pricing
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Saint Barthelemy eSIM plan comparison: four providers
Airalo connects to Orange's 5G network in Saint Barthelemy at $2.17/GB. Coverage spans all major cities and transport hubs.
Get eSIMOrange's 5G network in Saint Barthelemy backs Holafly's unlimited tier. Stream, navigate, and video-call without tracking per-GB usage — the daily rate is the total cost.
Get eSIMSaily routes through Orange in Saint Barthelemy with built-in VPN protection at $2.17/GB. Nord Security's infrastructure backs every plan.
Get eSIMNomad's 30-day refund applies to unused Saint Barthelemy eSIMs. Coverage runs on Orange's 5G network at $2.17/GB — once the plan is activated, unused data is non-refundable.
Get eSIMCompare providers: Airalo vs Holafly · Airalo vs Saily · Airalo vs Nomad · Holafly vs Saily · Holafly vs Nomad · Saily vs Nomad
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 | $10.00source | $70.00 | LTE | Plan data |
| Verizon | TravelPass | $10.00source | $70.00 | LTE | Plan data |
| T-Mobile | Magenta (high-speed add-on) | Free*source | $0–105 | 256kbps* | Throttled |
| Xfinity Mobile | International Pass | $10.00source | $70.00 | LTE | 200 MB/day |
| eSIM · Airalo | 1 GB · 7 days | — | $2.17 | LTE / 5G | 1 GB |
*T-Mobile includes data at 256kbps free; high-speed access is a $5–15/day add-on, shown here as a 7-day range.
* 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 Orange: 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
How much will you save with an eSIM in Saint Barthelemy?
Adjust your trip length, carrier, and data habits to see your exact savings.
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 $10/day. An eSIM connects to the same Orange infrastructure at $2.17/GB. AT&T pays Orange a wholesale rate and resells access to you at $10/day. The eSIM sells the same access at $2.17/GB. 5G is live on Orange's network in Saint Barthelemy. AT&T's roaming pass delivers that 5G signal at $10/day. A travel eSIM delivers the same 5G signal at $2.17/GB — no speed penalty for switching.
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: $140. Verizon: $140. T-Mobile high-speed: $210. A 10GB eSIM on Orange: $21.70. The difference between the cheapest carrier option and the eSIM is $118.30 less than AT&T.
Daily data cost comparison for Saint Barthelemy: AT&T $10/day, Verizon $10/day, T-Mobile high-speed $15/day, eSIM $1.55/day ($21.70 total over 14 days). On a per-day basis, the eSIM is 6.5x cheaper than AT&T.
AT&T charges $140 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 $5.89/day ($82.46 total), which is $57.54 less than AT&T.
Trip cost breakdown
Three trip scenarios: what AT&T charges vs eSIM cost in Saint Barthelemy
Three days in Saint Barthelemy costs $30 on AT&T at $10/day. A 2GB eSIM on Orange covers the same period for $16. Difference: $14.
Fourteen days costs $140 on AT&T — more than many flights to Saint Barthelemy. A 20GB eSIM on Orange covers 15GB of photos and video calls for $43.34. Difference: $96.66 (69%).
Thirty days on AT&T costs $300. A 50GB eSIM on Orange covers 50GB for $108.44. Difference: $191.56 over the month. AT&T rate: $10/day regardless of data consumed. 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 Orange's 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 $70 for the same 7 days on the same Orange network. For heavy data users, unlimited daily plans start at $5.89/day — still cheaper than any carrier roaming 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 Orange 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 Orange's towers in Saint Barthelemy. AT&T charges $10/day for that connection. An eSIM charges $2.17/GB. At typical daily usage, AT&T's rate is 3x higher per gigabyte.
Saint Barthelemy has one mobile operator: Orange. US carriers pay Orange for roaming access and pass that cost to you at $10/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
- Airalo 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 Airalo 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
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 — Airalo, Holafly, Saily, or Nomad — and complete the purchase. All four deliver 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.
Saint Barthelemy FAQ
Saint Barthelemy eSIM & roaming questions
How much does carrier roaming cost in Saint Barthelemy?
T-Mobile includes Saint Barthelemy in its free international plan, but throttles every connection to 256 Kbps — one-eighth the speed of basic 2G. AT&T costs $10/day, Verizon costs $10/day. A travel eSIM on Orange at $5.70 for 1GB provides full 5G — the same towers, none of the speed cap, and less money than either paid carrier option.
Is T-Mobile's free international data fast enough in Saint Barthelemy?
No. T-Mobile caps free international data at 256 Kbps in Saint Barthelemy — one-eighth the speed of basic 2G. At that rate, Google Maps takes 15+ seconds to load a single tile and will not work for navigation. Streaming video requires at least 1.5 Mbps; video calls need 2 Mbps. Basic WhatsApp text messages work, but anything else does not. T-Mobile's high-speed add-on for Saint Barthelemy costs $15/day. A travel eSIM on Orange's 5G network delivers full local speeds at $2.17/GB — cheaper per GB than the speed upgrade.
How is my roaming bill calculated in Saint Barthelemy?
Your carrier uses one of two models. Per-day billing: AT&T charges $10 and Verizon charges $10 for each calendar day your phone connects in Saint Barthelemy — even if you only check a notification at midnight. Per-MB billing: without a day pass, AT&T charges $2.05 per megabyte, which adds up to $2,099 per GB. Both models penalize casual background data usage. A travel eSIM uses flat-rate billing — you pay 1GB for $5.70 upfront, with no per-day activations and no per-MB overages. Once purchased, the cost is fixed regardless of usage patterns.
Does my phone need to be unlocked to use a travel eSIM in Saint Barthelemy?
In most cases, no. eSIM profiles install alongside your existing carrier SIM without requiring an unlock. iPhones purchased in the US after 2020 support dual SIM and eSIM regardless of carrier lock status. Android phones vary — most support eSIM without unlocking, but some budget models require unlocking before a second carrier profile can be installed. US carriers are required to unlock devices after contract fulfillment: AT&T unlocks after 60 days, Verizon after 60 days, T-Mobile after 40 days. If your phone is under contract or recently purchased, check your carrier's unlock policy before your trip to Saint Barthelemy. Rates checked June 2026.
How much data do TikTok and Instagram use in Saint Barthelemy?
TikTok at standard quality uses 700 MB/hour of viewing. Instagram Stories and Reels use 500-800 MB/hour depending on video resolution. At $2.17/GB on Orange in Saint Barthelemy, one hour of TikTok costs roughly $1.52 and one hour of Instagram Reels costs roughly $1.41. AT&T International Day Pass at $10/day covers all social media but applies the full daily fee regardless of how little you use. For travelers who browse social apps 30-60 minutes per day, the eSIM still costs less than one AT&T day fee. Rates checked June 2026.
How much does US carrier roaming cost in Saint Barthelemy?
AT&T charges $10/day in Saint Barthelemy on International Day Pass. Verizon charges $10/day on TravelPass. T-Mobile includes Saint Barthelemy at 256 Kbps free, or $15/day for usable speed. A 7-day trip: AT&T $70, Verizon $70, T-Mobile paid $105. A travel eSIM on Orange at $2.17/GB costs roughly $22.79 for the same week. Rates checked June 2026.
Does carrier roaming or an eSIM work better on a cruise departing from Saint Barthelemy?
On land in Saint Barthelemy, both options connect through Orange's 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.
Is a Caribbean eSIM plan cheaper than individual Saint Barthelemy coverage?
It depends on your itinerary. If you visit only Saint Barthelemy, a country-specific eSIM at $2.17/GB is the right choice. If your trip covers multiple islands, a regional Caribbean plan covering several countries under one data bucket may be cheaper than separate eSIMs for each stop. AT&T and Verizon charge $10/day per country — a 4-island trip at 2 days each costs $80 in carrier roaming.
What is T-Mobile's free tier speed in Saint Barthelemy, and is it usable?
T-Mobile's free international tier in Saint Barthelemy is capped at 256 Kbps. That speed supports plain text messages and basic email without attachments. It does not support Google Maps navigation (needs 500+ Kbps), WhatsApp photo sending (45+ seconds per image), or ride-hailing apps. T-Mobile's high-speed add-on runs $15/day — comparable to AT&T and Verizon. A travel eSIM on Orange at $2.17/GB delivers full 5G with no speed cap.
How much does carrier roaming cost for a week in Saint Barthelemy?
AT&T: $70/week (International Day Pass at $10/day). Verizon: $70/week (TravelPass). T-Mobile: free at 256 Kbps or $105/week for usable speed. The cheapest eSIM for Saint Barthelemy starts at $2.17/GB on Orange's 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 Orange's towers whether or not a VPN is active. AT&T still bills $10/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 Orange 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, Airalo is the strongest fit. Airalo covers Saint Barthelemy on Orange's network with the widest plan selection in the market. A 1GB plan costs $5.70. Regional bundles cover neighboring countries on a single eSIM. The app tracks data usage in real time — helpful for managing a fixed-GB plan. Holafly is the alternative for heavy data users — unlimited daily plans start at $5.89/day.
Saint Barthelemy eSIM vs AT&T roaming: the price difference
Saint Barthelemy eSIMs run on the same local towers as carrier roaming. The cost is $2.17 vs $70 for a week.
Get a Saint Barthelemy eSIM