Staying connected in Sri Lanka.

The tourist SIM counters at Bandaranaike airport are in the arrivals hall before you leave the building, and both Dialog and Mobitel sell packs aimed squarely at visitors: roughly 5 to 10 dollars for 25GB to 50GB, valid a month, with local calls and often some international minutes included. Bring your passport. The staff do this all day and it takes about ten minutes.

Set that against the alternatives and the case makes itself. A week of AT&T or Verizon day passes is 70 to 84 dollars. A travel eSIM is a few dollars per gigabyte, so a 10GB allowance costs several times the local pack. We earn a commission on eSIMs and nothing on a Dialog SIM, and the honest recommendation for most trips here is still the counter in the arrivals hall.

Dialog is usually the safe default on reach, with Mobitel close behind and sometimes stronger in the hill country around Ella and Nuwara Eliya. Either handles Colombo, Galle, the south coast, Kandy and the cultural triangle comfortably, with 4G almost everywhere a visitor goes and 5G in the bigger centers. The train to Ella, which is the ride everybody takes, holds a signal for most of the route and loses it in the tunnels and cuttings.

Where it genuinely thins: inside Yala and the other big parks, deep in the Knuckles range, on some interior roads and at remote surf points on the east coast. None of it is a trip-planning problem, and it is worth downloading offline maps for a park day or a hill drive rather than assuming.

Roaming on your US plan is the expensive default: AT&T and Verizon day passes are about 10 to 12 dollars a day, so a week is 70 to 84 dollars, though AT&T caps its Day Pass at 10 daily fees per line per bill period, about 120 dollars, and covers the rest of that bill period on land, so the daily arithmetic stops past day 10. T-Mobile is the exception worth checking before you buy anything: its current tiers include roughly 5GB on Experience More, Magenta MAX and Go5G Plus, 15GB on Experience Beyond and Go5G Next and 30GB on Better Value, slowing to 256kbps after that. If you are on one of those and travelling light, you may need nothing at all.

The honest case for a Nomad eSIM here is a late landing, a pre-booked transfer to confirm, or simply not wanting to queue after a long flight. It is a few dollars per gigabyte and it works from touchdown. That is convenience, not price. This guide is written for US travelers departing the US. For more, see cash or card in Sri Lanka, taxis and apps in Sri Lanka, and the Sri Lanka money guide.

Common questions

Quick answers.

More on Sri Lanka

The little money things nobody warns you about.

• The free Sri Lanka ETA for US citizensSri Lanka made its tourist ETA free for Americans in May 2026, but free does not mean skip it: you still have to get one before you board. Here is how, and how to make sure you are not overcharged by a lookalike site.
• Do I need cash in Sri Lanka, or can I use cards?Short answer: carry rupees. Cards work fine in Colombo and at hotels, but most of the everyday, and most of the fun, runs on cash. Here is how to get it well and what to keep on hand.
• Tipping in Sri LankaSri Lanka has a modest, warm tipping culture. The main things to know: restaurants often add a service charge already, and the person you will most want to tip well is your driver or guide.
• Taxis and tuk-tuks in Sri LankaThe tuk-tuk is how you will get around Sri Lankan towns, and the easy way to avoid overpaying is to let an app set the fare. Here is how, plus the airport and the traps.
• Common money scams in Sri Lanka, and what they cost youSri Lanka is a warm, welcoming country and the money traps here are small ones. Fares are so low that overpaying is usually a matter of a few dollars, and the two that can reach real money, the gem shop and the damage claim, are both defused by a decision you make before you spend anything. Almost all of it starts in the same place: a tuk-tuk driver who suggests somewhere you were not going. Here is each one, what it costs, and how to sidestep it.
• What does getting sick in Sri Lanka cost?Sri Lanka is reassuring on the everyday stuff and geographically lopsided on the serious stuff. Colombo carries the emergency and trauma capacity for the whole island, which makes where you are the first question, not what it costs.