Cheapest eSIM for USA from the UK (2026)

The cheapest eSIM isn't always the one with the lowest initial cost; what some operators don't tell you is that 90% of the time those eSIMs run out of data in a single day. 

When you calculate cost per gigabyte across a real trip, is the Sim Local Plan at ~£1.40/GB, not the £1.50/1GB entry plans that run dry before you've left the airport.

Here's the honest answer

• Cheapest headline price: Revolut ~£1.50/GB. Sounds great. Runs out in half a day.
• Cheapest for a real trip: Sim Local Plan; 18GB 30 days Three UK £20–24. Works out at ~£1.40/GB; less than Revolut, with 15x the data.
• The trap: Buying tiny plans and topping up 10 times costs more in total and ruins your trip. One flat-rate plan beats multiple micro-purchases every time.
• Unlimited option: Sim Local Unlimited Plan ~£38–50 for 7 to 15 days. Best for World Cup multi-city trips or road trippers who don't want to think about data.
• Hidden costs to avoid: Holafly throttles after a daily cap. Some budget providers use secondary networks with patchy rural coverage.

See Sim Local's USA eSIM Prices

Picture this: you've done your research. You found a USA eSIM for £1.50 per gigabyte. Bargain. You land in New York, activate it on the way through passport control, and open Google Maps to find your hotel.

Forty-five minutes later, your 1GB plan is gone. You're standing outside JFK with no data, a dead link to your hotel address, and no idea how much it'll cost to top up again.

You end up flagging down a cab, paying $55 for a ride that would have been $28 in an Uber. You've saved £3 on your eSIM and spent an extra £22 on the taxi.

This is the cheapest eSIM trap. And it catches thousands of British travelers every year.

This guide cuts through the noise. We'll show you exactly what USA eSIM plans cost per gigabyte, which "budget" options have hidden catches, and where Sim Local genuinely sits because, as one independent travel reviewer noted, Sim Local comes out cheaper most of the time when you compare data allowances like for like.

When you search for a cheap eSIM for the USA, you'll see headline prices as low as £1.50 to £2.99. Those numbers are real, but they're almost always for 1 GB over 7 days, the smallest plan each provider offers.

Nobody actually uses 1GB for a US trip. Here's a blunt reality check:

• Google Maps navigating for one hour: 40–50MB
• One Instagram video scroll session (20 mins): 100–200MB
• A single 30-minute WhatsApp video call home: 250–300MB
• One YouTube video (5 mins, HD): 150MB

A typical day out in New York: maps to get around, messaging your group, posting a couple of photos, looking up restaurant reviews; uses 800MB to 1.5GB without trying. A 1GB plan covers roughly half a day of normal use.

So the real question isn't "what's the cheapest 1GB plan?" It's: What's the cheapest plan that will actually cover my trip?

That's the number this guide gives you.

Here's where most comparison articles fail: they list headline prices without showing what you're actually getting.

The metric that matters is cost per gigabyte for a realistic trip-length plan. We've done the maths so you don't have to.

When you look at it this way, the picture changes completely. A £1.50 entry plan costs £1.50 per gigabyte but only buys you 1 GB. Sim Local's Explorer Plan works out at roughly £1.40 per gigabyte and gives you 15GB to use across 30 days, with no throttling, no daily caps, and coverage network across every US city. You can also see the best e-sim plan for US.

Cheap per-GB. Genuinely useful amount of data. No nasty surprises.

Here's a real-world look at what the cheapest option actually costs across different trip types; UK roaming vs a Sim Local eSIM vs a budget entry plan:

Roaming rates estimated at £5/day (varies by carrier). Budget eSIM assumes 2–3 top-up purchases.

The Sim Local Explorer Plan consistently delivers the best combination of low total cost, large data allowance, and zero mid-trip friction.

We don't shy away from naming names. Here's how Sim Local compares to the providers most UK travellers consider:

Airalo is well-known and genuinely decent. Plans start from $4 USD (~£3.20) for 1GB over 7 days. For a short trip with limited data needs, it works. But for a 10–14 day US holiday, you're looking at multiple purchases and a higher total cost once you add it all up. Airalo doesn't have a UK-specific support team. Sim Local's per-GB cost at the Explorer level is competitive with Airalo's comparable plans; and with one purchase covering your whole trip, there's no mid-holiday admin.

Revolut's eSIM integration is clever if you already use the app. Plans start from £1.50 for 1GB, which sounds unbeatable. But at 1GB increments, a 2-week trip could require 15–20 separate top-ups. Each one needs app access, a data connection to complete, and attention you'd rather be giving to the trip. If your Revolut eSIM stops working (it happens), support is routed through the banking app, not a specialist connectivity team.

Holafly's unlimited data angle is popular. But "unlimited" comes with a fair-use daily cap that throttles speeds for heavy users. If you're navigating between cities, streaming match highlights, or on a video call, you'll hit that cap and notice. Sim Local's Unlimited Plan has a higher high-speed threshold and clearer terms. For the same kind of budget, you often get a better experience.

easySim offers competitive entry-level pricing and is worth considering for very short, light-use trips. For anything beyond 3–5 days or anyone who relies on their phone heavily, Sim Local's network quality and larger plan options make it the better overall value.

There's no extra cost to buy your eSIM online versus at the airport. In fact, airport kiosks typically charge a premium. Set up at home:

1. Check compatibility: iPhone XS (2018) or newer. Samsung Galaxy S21+, Google Pixel 3+, or most modern Android flagships. Go to Settings > About Phone or Settings > Mobile Data to confirm eSIM support.
   
2. Buy at simlocal.com Choose your plan, select your dates, and complete checkout. You'll receive a QR code by email in minutes.
3. Scan the QR code. iPhone: Settings > Mobile Data > Add eSIM > Use QR Code. Takes about 2 minutes.
   
4. Assign lines correctly. Set the eSIM as your data line. Keep your UK SIM for calls and texts. Your UK number stays active throughout your trip.
   
5. Disable roaming on your UK SIM. Settings > Mobile Data > disable roaming on your UK line. This is the step that prevents accidental roaming charges from running alongside your eSIM.
   

Full walkthrough

How to install an eSIM on your iPhone using a QR code | Sim Local

It depends on the network. Sim Local runs on T-Mobile and AT&T; the two largest US networks; which means coverage in all major cities, national parks, and World Cup venues. Budget-only providers sometimes route through secondary networks with inconsistent rural coverage.

Yes. Sim Local's USA eSIM plans are compatible with all eSIM-capable iPhones (XS and newer) and most Android flagships, including Samsung Galaxy S21+, Google Pixel 3+, and OnePlus 8 and newer. Check your device settings under Mobile Data or SIM & Network to confirm eSIM support.

Yes. A travel eSIM adds a second line to your phone; your UK SIM stays in place and your UK number remains active. The eSIM handles your US data, while your UK SIM continues to receive calls and texts normally.

For a 14-day trip, the Sim Local Explorer Plan (15GB/30 days) offers the best balance of price, data allowance, and reliability. It works out cheaper per gigabyte than buying multiple smaller plans, with no mid-trip top-up needed.

Yes. Sim Local's plans run on the best network, covering all 11 World Cup host cities: Dallas, Boston, New York/NJ, Miami, Los Angeles, Seattle, Houston, Atlanta, Philadelphia, Kansas City, and San Francisco. 5G is available in all major urban areas.

The cheapest eSIM for a USA trip isn't the one with the lowest headline price. It's the one that covers your trip completely, on a reliable network, without requiring top-ups or causing problems when you need connectivity most.

Revolut's £1.50/GB is genuinely cheap. So is a budget airline seat with no legroom, a hotel without air conditioning, and a data plan that runs out on day 2 of a 14-day trip.

Good value for a USA eSIM means the right amount of data at a fair flat price, installed before you fly. Sim Local's Explorer Plan does exactly that; and at roughly £1.40 per gigabyte across 15GB, it's hard to beat on total cost for a typical UK trip.

Compare Sim Local USA Plans; From £8