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Cost comparison · 7-minute read
A travel eSIM costs 60 to 90% less than carrier roaming for international trips. A 5-day Japan trip costs $4.50 with an eSIM versus $50 to $60 with AT&T or Verizon roaming passes. The savings increase on longer trips and multi-country itineraries.
International data roaming lets you use your home carrier's plan abroad. Your phone connects to a foreign carrier network through an agreement between that carrier and yours. Your home carrier bills you for the data at international rates. Those rates are significantly higher than domestic rates.
Most US carriers sell daily roaming passes. AT&T International Day Pass costs $12 per day. Verizon TravelPass costs $10 per day. T-Mobile includes free international data on Magenta plans, but throttles speeds to 256 Kbps unless you buy a $5 per day speed upgrade.
The daily pass model adds up fast. A two-week trip to Europe costs $168 on AT&T or $140 on Verizon before you use a single gigabyte of your own data. On T-Mobile, the “free” data runs at speeds too slow for maps, video calls, or uploading photos. The speed upgrade brings the cost to $70 for the same two weeks.
A travel eSIM is a digital SIM card you download to your phone before a trip. It connects you to a local carrier network in your destination country. You get local data speeds at a fraction of the cost of carrier roaming. The eSIM works alongside your physical SIM, so you keep your home number active.
Providers like Airalo, Holafly, Saily, and Nomad sell eSIM plans for 150 to 200+ countries. You choose a data amount and trip duration, scan a QR code, and install the profile over WiFi. The eSIM activates when you land. No kiosk, no store visit, no surprise charges.
For a full explanation of how eSIM technology works and which phones support it, read our What Is an eSIM? guide.
We compared the real cost of three common trip scenarios using the three major US carriers against the best eSIM option for each destination. All prices are in US dollars and reflect June 2026 rates.
| Trip | AT&T Roaming | Verizon Roaming | T-Mobile Roaming | Best eSIM | Savings |
|---|---|---|---|---|---|
| Japan, 5 days | $60 | $50 | $25* | $4.50 (Airalo 1GB) | Up to $55 |
| Europe, 14 days | $168 | $140 | $70* | $27 (Airalo 5GB) | Up to $141 |
| Thailand, 7 days | $84 | $70 | $35* | $6.99 (Nomad 5GB) | Up to $77 |
| Global, 30 days | $360 | $300 | $150* | $89.70 (Holafly 30-day) | Up to $270 |
The numbers tell a clear story. A travel eSIM saves $55 to $270 depending on the trip. The savings are largest on long trips and expensive roaming markets. Even short trips show significant savings because carrier roaming charges start from day one.
Carrier roaming speeds depend on the agreement between your home carrier and the foreign network. AT&T and Verizon roaming passes give you full LTE speeds, but only on the partner network your carrier selects. T-Mobile throttles international data to 256 Kbps on standard plans. That speed loads a Google Maps search in 30 to 45 seconds. Video calls are impossible.
A travel eSIM connects you directly to a local carrier at full speed. In our testing, eSIM connections delivered 50 to 225 Mbps download speeds depending on the country and carrier. That is 200 to 900 times faster than T-Mobile's throttled roaming. Maps load instantly. Video calls run smoothly. Photos upload in seconds.
Holafly's unlimited plans throttle after a daily fair-use threshold (typically 5GB per day) to 256 Kbps to 1 Mbps. Fixed data plans from Airalo, Saily, and Nomad run at full speed until your data allowance runs out. For most travelers, a 5GB or 10GB fixed plan provides full-speed data for an entire trip without hitting any throttle.
Roaming requires zero setup. Turn on your phone abroad and data works. That simplicity is the only advantage roaming holds over eSIM. Everything else favors the eSIM approach.
The eSIM setup process takes about five minutes. You scan a QR code, follow the prompts, and the profile installs. The one-time effort of installation saves days of roaming charges and gives you more control over your data abroad.
Roaming is not always the wrong choice. A few situations favor staying on your carrier plan instead of buying a travel eSIM.
For everyone else, a travel eSIM is the better option on any trip of three days or longer. The cost savings alone justify the five minutes of setup time.
We test four eSIM providers across 200+ countries. Each provider fills a different need. Here is a quick comparison to help you pick the right one.
200+ countries. Starts at $4.50. Airalo covers 200+ countries with the widest footprint, the best app experience, and regional multi-country bundles for complex itineraries.
178 countries. Starts at $2.99/day. Holafly offers unlimited daily data plans across 178 countries.
150 countries. Starts at $3.99. Saily is backed by NordVPN's parent company Nord Security.
112 countries. Starts at $3.00. Nomad offers the lowest per-GB pricing in Southeast Asia and other budget destinations.
Switching from carrier roaming to a travel eSIM takes four steps. Do this before your next trip to stop paying roaming charges permanently.
If you forget to turn off roaming on your home SIM, your carrier may still route background data and charge you. Double-check that data roaming is off on your home line before boarding your flight.
Find the best eSIM provider for your destination and save 60 to 90% on your next trip.
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