Best eSIM for Thailand 2026: 5 Providers Priced
Thailand eSIM prices checked 27 Oct 2026: ONE eSIM is cheapest at 2 of 5 sizes from 1 to 20 GB, from $1.93 for 1 GB.
Short answer: ONE eSIM has the cheapest 1 GB eSIM for Thailand at $1.93 for 7 days; the next cheapest is Saily at $2.99. Prices checked 27 October 2026 across ONE eSIM, Airalo, Holafly, Saily and Nomad; the full table is below.
Thailand is one of the world's most-visited countries, from Bangkok's street food to the beaches of Phuket and Koh Samui, and a working eSIM from the airport saves you queueing at a SIM counter. We checked prices on 27 October 2026 across ONE eSIM, Airalo, Holafly, Saily and Nomad so you know what each GB actually costs.
Quick answer: Thailand eSIM prices by size
- 1 GB: ONE eSIM at $1.93 (7 days); next cheapest is Saily at $2.99 (7 days).
- 3 GB: ONE eSIM at $4.68 (15 days); next cheapest is Airalo at $5.50 (3 days).
- 5 GB: Airalo is cheapest at $7.00 (7 days); ONE eSIM is $7.43 (30 days). Best value: 4.3× the days of Airalo's plan for $0.43 more.
- 10 GB: Airalo is cheapest at $10.00 (7 days); ONE eSIM is $12.93 (30 days). Best for longer trips: one plan lasts 30 days; Airalo's lasts 7, so a trip longer than that needs two of them ($20.00).
- 20 GB: Nomad is cheapest at $15.00 (10 days, 50 GB); ONE eSIM is $21.97 (10 days, 50 GB).
Thailand eSIM prices compared (1 GB to 20 GB)
| Data | ONE eSIM Our price | Airalo | Holafly | Saily | Nomad |
|---|---|---|---|---|---|
| 1 GB | $1.93 (7 days) Cheapest, saves $1.06 | $4.00 (3 days) | – | $2.99 (7 days) | $5.00 (7 days) |
| 3 GB | $4.68 (15 days) Cheapest, saves $0.82 | $5.50 (3 days) | – | $5.99 (30 days) | $6.00 (30 days) |
| 5 GB | $7.43 (30 days) Best value: 4.3× the days for $0.43 more | $7.00 (7 days) Cheapest | – | $7.99 (30 days) | $8.00 (30 days) |
| 10 GB | $12.93 (30 days) Best for longer trips: one plan for 30 days | $10.00 (7 days) Cheapest | – | $10.99 (30 days) | $10.00 (30 days) |
| 20 GB | $21.97 (10 days, 50 GB) | $17.50 (15 days) | – | $19.99 (30 days) | $15.00 (10 days, 50 GB) Cheapest |
Holafly sells only unlimited plans for Thailand, so it has no price in the GB rows; its 7-day plan is in the week table below.
A week of unlimited data in Thailand
| Provider | 7 days | What you get |
|---|---|---|
| ONE eSIM | $15.40 | 1 GB a day at full speed, then 1 Mbps until the next day (7 × $2.20) |
| Airalo | $21.00 | 3 GB a day at full speed, then 1 Mbps (fair use) |
| Holafly | $27.50 | No daily cap; fair use may slow very heavy use |
| Saily | $20.99 | 5 GB a day at full speed, then up to 1 Mbps |
| Nomad | – | No 7-day unlimited plan |
For a week, ONE eSIM's 1 GB a day plan is the cheapest way to stay online all day at $15.40. The cheapest of the others is Saily at $20.99, which gives more full-speed data a day; compare by how much you use a day, not by the word unlimited.
Networks and coverage in Thailand
ONE eSIM's Thailand plans run across TrueMove H, DTAC and AIS, with 5G listed on the standard plans. Some cheaper plans use a two-network pairing (TrueMove H and DTAC), while pricier plans add AIS for the widest coverage. All three operators have strong coverage in Bangkok, Chiang Mai and the main tourist islands; check the plan name before buying if you're heading somewhere remote.
Which eSIM should you choose for Thailand?
- Short trip, light use (up to 3 GB): ONE eSIM's 3 GB plan at $4.68 (15 days), the cheapest at that size.
- Two weeks or more (5 to 10 GB): Airalo at $10.00 (7 days) is the cheapest at 10 GB; ONE eSIM is best for longer trips (one plan for 30 days).
- Heavy use (20 GB): Nomad at $15.00 (10 days, 50 GB) is the cheapest at 20 GB.
- Streaming or video calls every day: compare the unlimited plans above by how much full-speed data each gives a day.
How to set up your Thailand eSIM
- Check your phone supports eSIM (most iPhones since the XS and Android flagships since 2019 do).
- Buy and install the eSIM on Wi-Fi before you fly, so the QR code or install link downloads without using mobile data.
- Turn on the new eSIM line and enable data roaming once you land in Thailand, then switch off your home SIM's data to avoid charges.
Thailand eSIM FAQ
- Do I need an eSIM for Thailand? You don't need one, but it's usually the fastest way for a visitor to get mobile data without a SIM shop queue at the airport.
- Which network is best for Thailand's islands? Coverage varies locally; plans listing AIS, DTAC and TrueMove H together give you the best chance of a strong signal on Koh Samui, Koh Phangan and Phuket.
- Is 3 GB enough for a Thailand trip? For normal use (maps, messaging, some social media), ONE eSIM's 3 GB plan over 15 days is generally enough; heavy video streaming will use it up faster.
- Can I keep my home number active alongside the eSIM? Yes, the eSIM runs as a second line for data while your physical SIM stays active for calls and texts.
- What happens when I run out of data before my plan expires? On ONE eSIM's fixed-data plans you can simply buy a top-up or a new plan and keep using the same eSIM.
How we check prices
We read each provider's public Thailand page on 27 October 2026 and took its cheapest plan at or above each size, in US dollars before any coupon, with the validity in brackets; ONE eSIM prices are our live list prices on the same day. Prices move, so we re-check every month and keep the date on the page and in the short answer. If a number is out of date, write to support@oneesim.app and we will correct it.
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