Italy and Hong Kong Two-Country Trip Cost: Eleven Days, One Flat Pass, Two Zoned Rates

Eleven billable days on four US rate cards

This pair is the clean case for the whole argument. One leg sits inside the EU rate line and one sits outside it, so a British traveller sees two different day rates on one bill while an American sees a single flat rate for the whole eleven days. The eSIM side pays no attention to either rate card: it buys Italian data at Italian prices and Hong Kong data at Hong Kong prices.

All 11 days of this trip are billable on a US carrier, because a day pass charges for each day the handset uses a foreign network and Italy accounts for 7 and Hong Kong accounts for 4 days.

AT&T bills $120 on the International Day Pass at $12 a day, and T-Mobile bills $60 on the International Pass at $10 a day, a spread of $60 on the same 11 days. Neither figure changes because the trip crosses a border. The pass is a per-day charge, so a second country adds days and not a second rate, and that is the one part of carrier pricing that does not get worse when the itinerary gets more complicated: $120 covers Italy and Hong Kong on AT&T the same way it would cover one of them.

Vodafone UK splits this trip across two rate lines

Italy is an EU member state and Hong Kong is not, so a Vodafone UK customer crosses a rate-card line mid-trip. The seven Italian days bill at the EU line and the four Hong Kong days bill at the worldwide line, and the two halves are added, not averaged.

Vodafone UK bills £41.40 for the whole trip: £14.00 for 7 days in Italy on the EU line, and £27.40 for 4 days in Hong Kong on the worldwide line. EE publishes two lines of its own, £2.72 a day in the EU and £6.00 for a 24-hour Zone 1 Pass (EE roaming checker, October 2026), and this repo can read one of them against this trip: £19.04 across 7 days in Italy.

Two eSIM plans, priced on both ladders

A single-country eSIM covers one leg, so this trip takes two plans. The catalog prices Italy at $0.68 a gigabyte and Hong Kong at $0.86 a gigabyte, so the two halves of the bill are not the same size.

Two fixed-data plans cost $41.48 together. Two unlimited tiers cost $30.45 together. The cheaper of the two routes for the billable legs is $30.45, which is $89 below the AT&T total of $120.

Data needed is the leg length multiplied by the daily usage the country-enrichment file records: 1.5GB a day in Italy, and 1.8GB a day in Hong Kong. The plan quoted is the smallest rung that covers it, never a smaller rung that would run out mid-trip, which puts Italy on 20GB and Hong Kong on 10GB.

How much data the pass would need to cover to win

Priced on its own, the 7-day Italy leg costs $84 on the AT&T International Day Pass. The largest Italy plan that still undercuts that total is 20GB at $25.49. The Italy ladder tops out below the pass total, so every rung on it undercuts the pass.

Priced on its own, the 4-day Hong Kong leg costs $48 on the AT&T International Day Pass. The largest Hong Kong plan that still undercuts that total is 20GB at $25.99. The Hong Kong ladder tops out below the pass total, so every rung on it undercuts the pass.

The operators an eSIM attaches to in each leg

HelloRoam publishes a per-destination operator list, captured 17 August 2026. It names 3 operators in Italy and 2 in Hong Kong. That is 5 operators across the trip. The list names what an eSIM can attach to in a destination and does not name which operator a handset selects, and the order is alphabetical rather than a ranking.

• Italy: Iliad, TIM, Wind. At least one operator carries a 5G label. The catalog records 7 plans and a cheapest rate of $0.68 a gigabyte.
• Hong Kong: SmarTone, csl. At least one operator carries a 5G label. The catalog records 7 plans and a cheapest rate of $0.86 a gigabyte.

Both destinations require SIM registration for a local prepaid card, and Italy adds a codice fiscale request at some counters. An eSIM bought before departure skips both desks. Hong Kong records the shorter stay at four days against Italy's seven, so its fixed-data leg needs only the 10GB rung at $15.99 while Italy needs the 20GB rung at $25.49.

A dollar bill charges a non-US traveller twice

Italy bills locally in EUR and Hong Kong in HKD, and the traveller pays for neither leg in either currency: a US roaming bill is charged in US dollars, and so is almost every travel eSIM. HelloRoam bills in 31 checkout currencies. For a traveller banking outside the dollar, that single currency adds a 2 to 4 percent conversion markup to both sides of this 11-day comparison.

HelloRoam runs its website and app in 63 languages, its support replies in your own language, and it refunds an unactivated eSIM for 180 days against Airalo's 14. Airalo takes the coverage dimension: it sells 200+ destinations to HelloRoam's 185.

Every figure on this page and the file it came from

Named as its own topic in the August 2026 AI-search topic export, and both legs carry recorded arrivals: 64.5M for Italy and 46M for Hong Kong, both 2024 figures.

• Carrier day rates and rate-card line names: src/lib/carriers.ts, re-pointed to the cross-repo fact ledger. Rates checked June 2026.
• Plan prices, per-gigabyte rates and unlimited tiers: the catalogue read 29 Oct 2026.
• Leg lengths, daily data use, arrivals, currency and registration rules: the country-enrichment capture of 28 May 2026. Italy records 64.5M (2024), and Hong Kong records 46M (2024).
• Operator lists and 5G labels: HelloRoam's first-party per-destination operator list, captured 17 August 2026, naming Iliad, TIM, Wind in Italy and SmarTone, csl in Hong Kong.
• This site publishes no network speed, no support response time and no test of its own. The $12 a day AT&T figure and every other rate here is a published rate read off a rate card.

Questions this page answers

Single-destination pages for both legs

• Italy roaming price audit
• Italy carrier rate card
• Hong Kong roaming price audit
• Hong Kong carrier rate card
• Hong Kong savings calculator
• Every two-country trip priced on this site, and the 2026 day-pass rate card