The best USA eSIM for UK travellers
Search "best eSIM for USA" and you'll find forty providers, a hundred affiliate listicles, and prices in four currencies. Most of the advice is written to earn a commission, not to get a family from Manchester through a fortnight at Disney World without a roaming bill. Here's what actually separates a good US eSIM from a bad one — and where the well-known names genuinely differ.
The six things that actually matter
- Which US network it runs on. Every travel eSIM resells capacity on the big American networks. What matters is that yours runs on a major network with proper 5G — not a budget reseller of a reseller. If a provider won't say whose network you'll be on, that's your answer.
- The currency on the price tag. Most big eSIM brands price in US dollars or euros. Your bank then adds a non-sterling transaction fee — typically around 3% — and the "cheap" plan quietly isn't. Prices in pounds mean the number you see is the number you pay.
- Fixed gigabytes beat "unlimited". "Unlimited" US eSIMs almost always carry a fair-use policy: full speed for the first chunk of data each day, then throttled to speeds that struggle with a photo upload. A genuine 15GB at full speed beats "unlimited at 1Mbps after breakfast" for almost every holiday.
- When the clock starts. The good providers let you install at home and only start the validity period when you land (or when you first connect in the US). The bad ones start it at purchase — buy a week early and you've burned a week. Check the install window too: ours is 180 days, so you can buy in the January sales for an Easter trip.
- Whether you need an app. Some brands make you manage everything through their app — one more login, one more thing to go wrong at 11pm in a villa. A QR code by email installs in Settings in two minutes and needs nothing else.
- Support in your timezone. When your eSIM won't install, it's usually the evening before you fly. Support that answers on UK time, in plain English, is worth more than a dollar off the headline price.
How the big names compare
The honest version, not the affiliate version:
- Airalo — the biggest marketplace, and fine at what it does. Prices are in US dollars (so add your bank's conversion fee), plans are app-managed, and support is a global ticket queue. You're buying from a catalogue, not a specialist.
- Holafly — leads with "unlimited" data, which in practice means fair-use rules and heavily restricted hotspot/tethering on most plans. For a two-week trip it's routinely the most expensive option on the page — you're paying per day for data you won't use.
- Saily — NordVPN's eSIM brand. Competent, dollar-priced, app-led. Nothing wrong with it; nothing about it is built for a UK family holiday either.
- Nomad — similar story: solid tech, USD pricing, generic US plans, support on US-Pacific hours.
None of these are scams — they're generalists. The trade-off you make with all of them is the same: dollar pricing, app dependence, and support that has never heard of Thorpe Park, let alone told anyone how much data the Disney World app eats in a queue for Rise of the Resistance.
The price check: like for like, in pounds
Sticker prices below were checked on 23 July 2026 against each provider's public US rate card. Dollar prices are converted at $1.30/£ plus the ~3% non-sterling fee most UK debit and credit cards add to a dollar purchase — the fee the listicles never mention. Our prices are pulled live from our own price list, in pounds, so there's no conversion and no fee.
Fixed-data plans, 30-day validity
| Provider | Plan | Sticker price | What you'd pay in £ | Per GB |
|---|---|---|---|---|
| eSIM Florida | 15GB / 30 days | £16.99 | £16.99 — no fees | £1.13 |
| Airalo | 10GB / 30 days | $22.50 | ≈ £17.83 | £1.78 |
| Saily | 10GB / 30 days | $22.99 | ≈ £18.22 | £1.82 |
| Nomad | 10GB / 30 days | $25.00 | ≈ £19.81 | £1.98 |
| eSIM Florida | 20GB / 30 days | £23.99 | £23.99 — no fees | £1.20 |
| Nomad | 20GB / 30 days | $34.00 | ≈ £26.94 | £1.35 |
| Airalo | 20GB / 30 days | $36.50 | ≈ £28.92 | £1.45 |
| Saily | 20GB / 30 days | $36.99 | ≈ £29.31 | £1.47 |
Our 15GB plan costs less than every rival's 10GB plan — with half as much data again. Nobody else on this table sells a family option at all: our automatic bundle prices three 15GB eSIMs at £44.99 — £15.00 per phone.
"Unlimited" plans — read the daily caps
| Provider | Plan | The catch | Sticker price | In £ |
|---|---|---|---|---|
| eSIM Florida | 2GB every day / 14 days | None — 28GB, all full speed | £29.99 | £29.99 |
| Nomad | Unlimited / 10 days | 2GB/day full speed, then 1Mbps | $42.00 | ≈ £33.28 |
| Saily | Unlimited / 15 days | 5GB/day, then heavily throttled | $48.99 | ≈ £38.82 |
| Holafly | Unlimited / 15 days | Fair-use policy; hotspot capped | $50.50 | ≈ £40.02 |
| Airalo | Unlimited / 30 days | 3GB/day full speed, then 1Mbps | $69.00 | ≈ £54.67 |
The straight answer, as of July 2026: a UK traveller covering a Florida fortnight pays £16.99 here for 15GB at full speed — less than Airalo, Saily or Nomad charge for 10GB, less than half what Holafly charges for its capped "unlimited" fortnight, and £50–84 less than EE, O2, Vodafone or Three roaming passes. Prices move; when they do, this table gets updated — the date at the top is real.
Where we're different (and where we're not)
We sell one thing: US data for people flying to Florida, mostly from the UK. That focus buys you:
- Prices in pounds — 15GB for 30 days is £16.99, flat. No conversion fee, no daily meter.
- A family bundle no big brand offers — three 15GB eSIMs for £44.99, applied automatically. Airalo, Holafly and the rest sell per-line at full price; a family of three pays roughly triple.
- QR by email, no app — install on home wifi in two minutes; the plan only starts when you land. You've got 180 days from purchase to travel.
- UK-hours human support, seven days a week — and a plain promise: if your eSIM won't install on a compatible phone, we fix it or refund it. See our refund policy.
Where we're not different: your phone still needs to be unlocked and eSIM-compatible (iPhone XS or newer, Galaxy S20 or newer, Pixel 3 or newer — the same rule as every provider on this page). We check compatibility at checkout before taking a penny.
The maths against roaming
The comparison that matters isn't eSIM vs eSIM — it's eSIM vs doing nothing and paying your network. A fortnight of daily roaming passes costs roughly £70 with Three, £84 with EE or O2, and £100+ with Vodafone — per person. Our most popular plan covers the same fortnight for £16.99, and your UK SIM stays in the phone for calls, WhatsApp and iMessage as normal. The full breakdown is in our Florida-from-the-UK guide.
Quick answers
How much data for two weeks? Most people use 700MB–1GB a day on maps, park apps, WhatsApp and social — 15GB covers a fortnight comfortably. Heavy streamers should take 20GB or the daily-refresh plan.
Will my number still work? Yes — the eSIM sits alongside your UK SIM. WhatsApp, iMessage and your number carry on exactly as at home. More in the FAQ.
What about calls to US restaurants and Uber? Data covers it: Uber, OpenTable and park dining all work in-app, and WhatsApp handles everything else.