Best eSIM for International Travel in 2026: AviaeSIM, Airalo, Holafly, Saily, Ubigi and Jetpac Compared

Every travel eSIM works the same way: you buy a plan, scan a QR code, and the phone joins a local network abroad while your own SIM stays in the second slot. The differences that matter are elsewhere. Coverage: the exact countries on the plan, because a "Europe" plan on one provider is 28 countries and on another 41. Price per gigabyte, which only makes sense once you know whether the plan is fixed-data or unlimited. The fair-use rule behind "unlimited" — how much full-speed data a day, and what speed after it. Validity: whether the days count from purchase or from the first connection. Hotspot: whether tethering is allowed and capped. And support: who answers when the profile does not install at 2 a.m. in an arrivals hall.

Price alone is a poor guide. A $4 plan that covers the wrong country, or a $70 unlimited plan for a trip where 5 GB would do, both cost more than they should. The sections below go through the six providers by the type of trip, then by the rules that decide value.

The table summarises what each provider states on its own site or in the September 2026 reviews; prices change monthly, so treat them as the order of magnitude and check the plan card before buying.

Two things stand out. Only Holafly sells unlimited data everywhere, and it prices by the day rather than by the gigabyte, so it is the reference point for heavy users and the wrong choice for light ones. And the cheapest entry prices — Saily, Ubigi and AviaeSIM — are all for single-country plans, which is where the real saving on a one-destination trip sits.

If the whole trip is in one country, buy that country's eSIM. Country plans run on one or two national networks and cost the least per gigabyte on every provider in the table; regional and global plans pay for coverage you will not use. AviaeSIM's country eSIMs start at $1.08 and name the network on the plan card where the supplier lists it — Japan on SoftBank and KDDI, for example — with Italy, Turkey, Thailand, the United States — and the live starting prices for the most-visited countries are below.

The trap with country plans is validity: a 7-day plan bought on Monday for a Friday flight must not start counting on Monday. On AviaeSIM the clock starts when the eSIM first connects at the destination, so you can install it a month ahead and leave it switched off.

Cross a border on a country plan and the data stops. Regional plans exist for that, and this is where providers differ most. AviaeSIM's Europe eSIM comes in a 41-country version — the EU plus the UK, Switzerland, Norway, Iceland, Turkey, Ukraine, Georgia and the Western Balkans — and a 28-country EU-plus-UK version; its Asia Pacific eSIM covers 18 countries from Japan to Indonesia; the Latin America eSIM covers 17 mainland countries with a separate 26-country Caribbean plan; Oceania covers 8 and North America the USA, Canada and Mexico. Other providers draw their regions differently, and the same brand can sell a "Europe" plan that skips Switzerland or the Balkans.

So the rule for a multi-country trip is simple: write down every country you will set foot in, including the one you transit through, and buy the regional plan whose list contains all of them. If no regional plan does — a trip that mixes Europe and Asia, say — that is what a global plan is for.

No travel eSIM is unlimited without a rule. On AviaeSIM, Airalo and Saily an unlimited plan gives full 4G/5G speed up to a daily allowance — 3 GB a day on AviaeSIM — and then drops to a slower rate (1 Mbps on AviaeSIM) until the allowance renews 24 hours later, which still runs maps, messaging and email. Holafly's unlimited plans work the other way round: no fixed daily allowance on the phone itself (within Holafly's fair-use terms), but hotspot sharing limited to a set amount per day, and a price per day rather than per gigabyte.

The maths decides. Three gigabytes a day covers a full day of maps, messaging and social media with room for a couple of hours of video calls or standard-definition streaming, so a traveller who streams in the evening and works on video calls by day will hit the cap on the busiest days and be comfortable on the rest. A traveller who mostly navigates and messages uses 100–300 MB a day and is paying for nothing on an unlimited plan; a 5 or 10 GB fixed plan costs a fraction. AviaeSIM's unlimited Europe eSIM and its unlimited country plans are on the same 3 GB-a-day rule, stated on the plan card.

A global plan is the answer when a trip spans regions, when the route is still open, or when you simply do not want to think about coverage again. AviaeSIM's global eSIM covers up to 202 countries on one profile, with each plan card listing its exact set; Airalo's Discover plans and the other providers' global packs play the same role with their own lists. Expect to pay more per gigabyte than on a country or regional plan — that is the price of not caring where you are — and check that the smaller countries on your route are actually on the list, because global plans are where the gaps hide.

Divide the plan price by its data for fixed plans, and by its days for unlimited plans, then compare like with like. A 10 GB plan at $12 is $1.20 per gigabyte; an unlimited 7-day plan at $27 is about $3.90 a day, which is cheaper than the fixed plan only if you use more than 3 GB a day, every day. Then add what the headline number hides: top-up prices if you might run out, whether the plan includes calls (most are data-only, and that is fine — WhatsApp and FaceTime carry the calls), and whether validity starts at purchase. AviaeSIM shows the full price on the plan card, applies any sale automatically at checkout with no promo code, and lets you top up the same eSIM from your account.

Install the eSIM at home over Wi-Fi — iPhone: Settings → Cellular → Add eSIM; Android: Settings → Network & internet → SIMs (Samsung: Connections → SIM manager) — and keep it switched off until departure. At the destination, turn it on and enable data roaming for the eSIM only; the phone picks a local network by itself. Three questions to settle before paying: does validity start at the first connection (AviaeSIM: yes), is hotspot allowed on the plan you want, and is your phone eSIM-capable and carrier-unlocked. AviaeSIM's compatibility check covers the last one, and how it works walks through the screens.

Every iPhone from the XS and XR onward, Google Pixel 3 and newer, Samsung Galaxy S20 and newer and most recent flagships from other brands support eSIM; a few regional variants and most budget Android phones do not. The phone must also be unlocked — a carrier-locked phone will not accept a foreign profile even if it supports eSIM. If your phone fails either test, no provider in this guide can help, and a local SIM at the destination is the fallback.

AviaeSIM sells prepaid eSIMs for 193 countries, regional plans for six regions and a global plan, all bought on the website with the QR code delivered by email — no app required, and an account for top-ups. Country plans start at $1.08; unlimited plans use the 3 GB-a-day rule; validity starts at the first connection; sales are applied at checkout without a code. It does not sell subscriptions, and its unlimited catalogue is not as universal as Holafly's. For a single-country trip or a regional one whose countries are on the list, it is usually the cheapest of the six per gigabyte; for a route that needs unlimited data in a country where AviaeSIM has none, Holafly is the honest recommendation. The current deals page lists every discounted plan.