Cheapest eSIM for Thailand (2026): Airalo vs AIS vs True
Airalo's Thailand eSIM prices next to the AIS and True tourist SIMs, all checked 18 Oct 2026, plus the official Airalo code that cuts 15% off.
Thailand eSIM & tourist SIM prices
Unlimited-data plans. Public prices checked 18 Oct 2026.
| Option | Price | Validity | Buy where | Catch | Link |
|---|---|---|---|---|---|
| Airalo Thailand UnlimitedEasiest | $9.50 / $15 / $21 / $31 / $39 / $49 | 3 / 5 / 7 / 10 / 15 / 30 days | Online, before you fly | Paid in USD. OCTOBER15 = 15% off your first eSIM | See Airalo plans (affiliate link, opens in a new tab) |
| AIS Tourist SIMCheapest for long stays | ฿399 to ฿1,599 + 7% VAT | 8 days (฿499), 15 days (฿699), 30 days (฿1,599) | Airport counter / AIS shop / online | Prices exclude VAT. Passport registration | AIS eSIM on Klook (affiliate link, opens in a new tab) |
| True Tourist SIM (INFINITE) | ฿449 | 8 days | Airport counter / True shop | Passport registration. Check the current plan list |
AIS 8- and 15-day validities come from a search summary of the AIS page. The ฿399 and ฿1,199 plan durations aren't confirmed. Not yet verified — we'll update this after checking first-hand
Short answer: for a week or less, Airalo with the official OCTOBER15 code (15% off your first eSIM) is cheap and installs before you land. For 2–4 weeks, a local AIS or True tourist plan usually costs less per day, if you don’t mind buying it on arrival.
Airalo: prices and the official code
Airalo’s Thailand page lists Unlimited packages (network listed as True): 3 days $9.50, 5 days $15, 7 days $21, 10 days $31, 15 days $39, 30 days $49.
Airalo’s official deals page shows OCTOBER15 for 15% off your first eSIM. It can’t be combined with the $3 referral credit. Full terms and the code table are on our Airalo codes page.
AIS tourist plans
The official AIS tourist plan page lists unlimited tourist packages at ฿399, ฿499, ฿699, ฿1,199 and ฿1,599. The ฿1,599 plan lasts 30 days. Search summaries of the page give 8 days for ฿499 and 15 days for ฿699. Prices exclude 7% VAT. Not yet verified — we'll update this after checking first-hand AIS also says identity must be re-verified after 60 days if you keep the number.
You can also buy an AIS 5G eSIM through Klook. Its listing describes 15 GB/day at full speed, then 1 Mbps. Not checked yet — we'll add this after checking first-hand
True tourist plans
True’s tourist SIM page lists an INFINITE 8-day plan at ฿449 (per search snapshot of the page). Not yet verified — we'll update this after checking first-hand
Which is cheapest for you?
| Trip length | Likely cheapest | Why |
|---|---|---|
| 3–7 days | Airalo + OCTOBER15 | Small total. Works the moment you land |
| 8–15 days | AIS ฿499 / ฿699 or True ฿449 | Lower per-day cost, but buy on arrival |
| 30 days | AIS ฿1,599 (+VAT) or Airalo 30-day $49 | Compare at today’s exchange rate |
We haven’t converted baht to dollars, because the rate moves. Check today’s rate (for example in Wise), or use our trip cost calculator, which uses live exchange rates.
Not sure how much data you need?
Our free eSIM data calculator estimates how many GB your trip needs from maps, social media, streaming and hotspot use. On a short trip, a fixed-GB plan may be cheaper than unlimited.
Before you buy any eSIM
- Phone must support eSIM and be carrier-unlocked.
- Keep your home SIM for bank SMS codes. Most phones run two lines.
- Install over Wi-Fi before you fly, but check when validity starts. Not yet verified — we'll update this after checking first-hand
Prices are public listings checked on 18 Oct 2026. We haven’t speed-tested these plans for this guide yet. Not yet verified — we'll update this after checking first-hand