How to Call USA from UK Cheaply in 2026

Learn how to dial the US from the United Kingdom, compare BT, EE, and Vodafone rates with VoIP apps, and find the cheapest way to stay connected across the Atlantic.

How to Dial the US from the UK

Three steps get you from a UK phone to a US number:

1. Dial the international access code: 00 (or use + on a mobile phone)
2. Dial the US country code: 1
3. Dial the full 10-digit US number (area code + local number)

For example, to call a US number (312) 555-6789, you would dial +1 312 555 6789 from your UK mobile or 00 1 312 555 6789 from a UK landline.

All US phone numbers follow the same format regardless of whether they are mobile or landline, so you do not need to worry about different dialing rules for different types of US numbers.

UK Carrier Rates for Calling the US

UK carriers charge varying rates for calls to the US. Here is an overview:

• BT (landline): Moderate per-minute rate. Some BT calling plans include US minutes, but check the fine print for limits and exclusions.
• EE (mobile): Per-minute rates for US calls from an EE mobile can be significant. International add-ons are available but come with monthly fees.
• Vodafone UK (mobile): Similar to EE — per-minute charges without an add-on, or a monthly bolt-on with a capped number of minutes.
• Three (mobile): Offers some international calling features but US calls typically carry per-minute charges.
• Sky Talk (landline): Some packages include US calls, but often with time restrictions or minute caps.

The challenge with UK carrier international plans is the complexity. Each carrier has different tiers, bolt-ons, and restrictions. With a VoIP service, you get one simple rate with no surprises.

Cheapest Alternatives to UK Carrier Rates

VoIP services offer dramatically lower rates for calling the US from the UK:

• ZephyPhone: Published per-minute rates per minute to US numbers. No monthly fees, no contracts, works in your browser. Check our rates page for current pricing.
• Google Voice: Cannot be set up from the UK (requires a US phone number), so this is not an option for UK-based callers.
• Viber Out: Moderate rates to the US. Requires the app installed.
• Rebtel: Offers US calling plans but requires a monthly subscription for the best rates.

ZephyPhone is particularly good for UK callers because it works from anywhere with no geographic restrictions. Unlike Google Voice (which requires a US number), ZephyPhone works for anyone worldwide.

US Toll-Free and Business Numbers

Calling US toll-free numbers (800, 888, 877, 866, 855, 844, 833) from the UK can be tricky:

• From a UK landline: Most UK carriers will connect to US toll-free numbers, but they charge international rates — the call is not free for you.
• From a UK mobile: Some UK mobile carriers block or charge premium rates for US toll-free numbers.
• From ZephyPhone: You can call US toll-free numbers at standard US calling rates. The call routes through US infrastructure for reliable connectivity.

If you regularly need to call US businesses, banks, or customer service lines that only provide toll-free numbers, ZephyPhone ensures you can always connect at a predictable, low rate.

Getting Started with ZephyPhone from the UK

Setting up ZephyPhone to call the United States from the UK is quick and simple:

1. Visit zephyphone.com and create a free account. Works with any email address.
2. Add credit using a UK debit or credit card. Start small to try the service.
3. Open the dialer in your browser — Chrome, Safari, Edge, or Firefox.
4. Dial +1 followed by the 10-digit US number.
5. Talk. HD voice quality connects in seconds.

No app download needed, no contracts, no monthly fees. Your credit never expires, so you can top up once and use it whenever you need to call the US. Whether you are calling New York, Los Angeles, Dallas, or any city in the United States, the rate is the same.

The time difference between the UK and the US East Coast is 5 hours (UK is ahead). Afternoon in the UK (2:00 PM) is morning in New York (9:00 AM) — a great window for business or personal calls. For the West Coast, add 3 more hours: 2:00 PM UK time is 6:00 AM in California.