Asia · verified 2026-09-07
The best eSIM for Thailand in 2026
Cheap and fast in Bangkok, Chiang Mai, Phuket and the main islands. AIS has the broadest rural and island coverage.
Cheapest for a short trip
1GB · 7 days
Two to four days of maps and messaging for the lowest possible outlay.
Check SailyBest for about a week
Unlimited · 7 days
Cheapest 7‑day unlimited plan — no data cap to think about.
Check AiraloCheapest for a month
Unlimited · 30 days
Lowest 30‑day unlimited price for a long stay.
Check AiraloUnlimited data by trip length
Airalo and Holafly both sell unlimited data priced purely by number of days. Same idea, so it comes down to price and coverage.
| Provider | 3 days | 5 days | 7 days | 10 days | 15 days | 30 days | |
|---|---|---|---|---|---|---|---|
| Airalo | $9.50 | $15.00 | $21.00 | $31.00 | $39.00 | $49.00 | Check price |
| Holafly | $11.90 | $20.50 | $27.50 | $36.50 | $50.50 | $73.90 | Check price |
| SailyAlso sold for 5–30 days at other prices | — | — | — | — | $38.99 | — | Check price |
Unlimited-data plans, price in USD, verified 2026-09-07. Highlighted cell = cheapest for that trip length. Providers change pricing often — tap “Check price” for the live figure.
Cheaper capped-data plans
If you only need maps and messaging, Saily's capped plans cost a fraction of any unlimited plan. Pick a size, top up if you run low.
| Plan | Price | Per GB | Network | |
|---|---|---|---|---|
| 1GB · 7 days | $2.99 | $2.99 | AIS / dtac | Check price |
| 3GB · 30 days | $5.99 | $2.00 | AIS / dtac | Check price |
| 5GB · 30 days | $7.99 | $1.60 | AIS / dtac | Check price |
| 10GB · 30 days | $10.99 | $1.10 | AIS / dtac | Check price |
| 20GB · 30 days | $19.99 | $1.00 | AIS / dtac | Check price |
Saily capped-data plans, price in USD, verified 2026-09-07. “Per GB” is our calculation. Tap “Check price” for the live figure and any first-order discount.
Choosing a plan for Thailand
Unlimited vs capped. For most two‑week trips of normal use, a 5GB capped plan (~$7.99) is enough and the cheapest route. Choose unlimited if you'll stream daily, use your phone as a laptop hotspot, or simply don't want to watch a counter.
Airalo vs Holafly. Both are unlimited‑by‑days. Airalo is usually a few dollars cheaper for the same trip length and covers more countries; Holafly throws in 1GB/month of global backup data and lets you share ~1GB/day with a companion.
Coverage. Data is inexpensive here — a 10–15GB plan costs little more than 5GB and removes any worry about running out.
Backup. An eSIM sits alongside your normal SIM, so you keep your home number live for bank codes and 2FA while the travel plan handles data.
Thailand eSIM FAQ
Do I need to register an eSIM to use it in Thailand?
No. Travel data eSIMs for Thailand activate on arrival with no ID check or in‑person registration. Install the eSIM before you fly and switch on data roaming when you land.
Should I get unlimited data or a capped plan for Thailand?
If you'll use maps, messaging and some browsing, a capped 1–5GB plan from Saily is far cheaper and usually enough. If you'll stream, tether a laptop, or just don't want to think about it, an unlimited plan from Airalo or Holafly is worth the extra. Data is inexpensive here — a 10–15GB plan costs little more than 5GB and removes any worry about running out.
Is Airalo or Holafly cheaper in Thailand?
On the trip lengths we track, Airalo is the cheaper of the two in 6 of 6 — typically by a few dollars. Holafly's plans include 1GB/month of global backup data and a data‑sharing feature, which may tip it for some travellers.
Which network will the eSIM use in Thailand?
Plans here run on AIS or TrueMove H, sometimes dtac. The provider assigns the network; our tables show the one each plan is currently mapped to.
Can I make phone calls on a Thailand eSIM?
These are data plans, so no local number for regular calls or SMS. Calls over WhatsApp, FaceTime, Signal or Google Voice work fine on the data connection. Saily also sells an optional US phone number add‑on.
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