What is the difference between the UK ETA and the US ESTA? If you are an American traveler planning a UK trip, or a British citizen visiting the United States, you have probably encountered both of these electronic travel authorization systems. While they serve similar purposes, there are important differences in cost, validity, application process, and coverage that every traveler should understand.
| UK ETA factor | Detail | Cost / Time 2026 | For US travelers |
|---|---|---|---|
| Application fee | UK Home Office | £20 | ≈ $20 |
| Processing time | Standard online | 3 business days | Apply 5-7 days ahead |
| Validity | Multiple entry | 2 years or passport expiry | Whichever comes first |
| Maximum stay | Per entry | 6 months | Unlimited entries |
| Passport requirements | Biometric US passport | Min. 3 months valid | Check expiry |
This guide provides a detailed comparison of the UK Electronic Travel Authorisation (ETA) and the US Electronic System for Travel Authorization (ESTA), helping you understand who needs which document, how to apply, and what to expect.
UK ETA vs ESTA: Quick Comparison Table
| Feature | UK ETA | US ESTA |
|---|---|---|
| Full name | Electronic Travel Authorisation | Electronic System for Travel Authorization |
| Country | United Kingdom | United States |
| Cost | £10 (~$13 USD) | $21 USD |
| Validity period | 2 years | 2 years |
| Maximum stay per visit | 6 months | 90 days |
| Multiple entries | Yes, unlimited | Yes, unlimited |
| Processing time | Usually within 3 working days | Usually within 72 hours |
| Application method | App or website | Website only (CBP) |
| Linked to passport | Yes | Yes |
| Covers transit | Yes | Yes |
| Biometric required | Facial photo via app | No biometric |
| Launched | January 2025 | January 2009 |
Who Needs a UK ETA?
The UK ETA is required for citizens of visa-exempt countries who want to visit the United Kingdom. This includes all US passport holders. You need an ETA for:
- Tourism and sightseeing visits
- Business meetings, conferences, and negotiations
- Transit through the UK to another destination
- Short-term study courses (up to 6 months)
- Medical treatment
- Visiting family and friends
Apply for your UK ETA at gov.uk/eta. Read our complete UK ETA guide for US citizens for step-by-step instructions.
Who Needs a US ESTA?
The US ESTA is required for citizens of Visa Waiver Program (VWP) countries visiting the United States. This includes UK passport holders. The ESTA covers:
- Tourism and vacation travel
- Business meetings and conferences
- Transit through the United States
- Short visits of up to 90 days
Key Differences Between UK ETA and ESTA
Cost Difference
The UK ETA is significantly cheaper at £10 (approximately $13 USD) compared to the US ESTA at $21 USD. This makes the UK ETA one of the most affordable electronic travel authorizations in the world. Both fees are non-refundable, even if the application is denied.
Maximum Stay Duration
This is one of the most significant differences. The UK ETA allows stays of up to 6 months per visit, while the US ESTA limits stays to 90 days. This means American travelers to the UK have much more flexibility for extended trips, long-term tourism, or extended business assignments.
Application Process
The UK ETA can be applied for through a dedicated smartphone app (available on iOS and Android) or through the government website. The app allows you to scan your passport and take a biometric photo using your phone. The US ESTA is only available through the CBP (Customs and Border Protection) website and does not require biometric data.
Processing Speed
Both systems typically process applications within a few days. The UK ETA states most decisions within 3 working days, while the US ESTA aims for 72 hours. In practice, many applications for both systems are approved much faster, sometimes within hours.
Scope of Coverage
The UK ETA covers England, Scotland, Wales, and Northern Ireland. The US ESTA covers all 50 states, US territories, and transit through the US. Note that the UK ETA does not cover travel to Ireland (which has separate entry requirements) or British Crown Dependencies like Jersey and Guernsey (which have their own rules).
Common Mistakes to Avoid
- Confusing the two systems: Having an ESTA does not allow you to enter the UK, and having an ETA does not allow you to enter the US
- Letting your authorization expire: Both expire after 2 years or when your passport expires, whichever comes first. Check validity before every trip.
- Applying on unofficial websites: Only use the official UK government site or app for ETA applications, and the official CBP site for ESTA applications. Third-party sites charge excessive fees.
- Forgetting family members: Every traveler, including children and infants, needs their own ETA or ESTA
Read our UK ETA mistakes to avoid and UK ETA guide for children for more details.
Do You Need Both an ETA and an ESTA?
If you are an American traveling to the UK, you only need a UK ETA. If you are a British citizen traveling to the US, you only need a US ESTA. However, if your trip involves both countries (for example, flying from the US to the UK and back), the American traveler needs a UK ETA, and the ESTA is not relevant since you are returning to your home country.
Frequently Asked Questions: UK ETA vs ESTA
Is the UK ETA the same as the US ESTA?
No. While both are electronic travel authorizations for visa-exempt travelers, they are separate systems run by different governments. The UK ETA is for travel to the United Kingdom, while the US ESTA is for travel to the United States. You cannot use one in place of the other.
Which is cheaper, the UK ETA or the US ESTA?
The UK ETA costs £10 (about $13 USD), while the US ESTA costs $21 USD. The UK ETA is the cheaper option by approximately $8.
Can I stay longer in the UK with an ETA than in the US with an ESTA?
Yes. The UK ETA allows stays of up to 6 months per visit, while the US ESTA limits stays to 90 days. This is one of the biggest practical differences between the two systems.
Do children need their own UK ETA and US ESTA?
Yes. Every traveler regardless of age needs their own authorization. Parents can apply on behalf of children through the UK ETA app or website. See our UK ETA guide for children and family application guide.
How far in advance should I apply for a UK ETA?
Apply at least 1 to 2 weeks before travel, though most applications are processed within 3 working days. Since the ETA is valid for 2 years, consider applying well ahead of your trip. See our UK trip planning guide.
Practical UK travel preparation guide for US visitors
For American travelers heading to the United Kingdom, good planning is essential. Direct flights from major US hubs to London Heathrow take 7-9 hours (NYC: 7h, LAX: 11h, ORD: 8h). British Airways, American Airlines, Delta, United, and Virgin Atlantic offer daily direct service from JFK, Newark, LAX, ORD, ATL, IAD, BOS, MIA. Prices vary widely: economy advance booking 2-4 months ahead offers $400-800 round-trip, last-minute can reach $1,500+. Premium economy adds $500-800 for more comfort on long flights. Direct flights to Manchester, Edinburgh, Glasgow are also available from major hubs.
UK ETA is mandatory for all US citizens since April 2, 2025 — regardless of stay duration. Apply via gov.uk or the official UK ETA app, pay £20 (≈$25), and expect approval within 24-48 hours in 95% of cases. Ensure your passport is valid at least 3 months beyond your planned return date — UK ETA is linked to the passport number and becomes automatically invalid if you renew your passport. Keep approval email digital and on paper as backup.
For local transport in the UK, use contactless payment with a Visa/Mastercard (no foreign transaction fees if your card supports it). London Underground, buses, DLR, and suburban trains accept all these methods with daily price capping (£8.50 for zones 1-2). For longer journeys, the Trainline app is the best platform — Advanced fares booked 12 weeks ahead are 50-70% cheaper than walk-up tickets. Britain has a privatized rail system, so prices vary between operators (Avanti West Coast, GWR, LNER).
British culture and etiquette for American visitors
British politeness is legendary and may differ from American directness. “Sorry”, “Please” and “Thank you” are used constantly — even without obvious reason. Expect “How are you?” to be a politeness phrase, not a serious question — answer simply with “Fine thanks, you?” British humor is dry and ironic, often self-deprecating. Tipping is appreciated but not at US levels — 10-12.5% in restaurants is standard (often included as “service charge” automatically). At pubs, you order at the bar and pay immediately — no tipping needed. Queues are sacred — pushing past someone is the worst social faux pas in UK.
For American families visiting UK, there are abundant cultural experiences. London offers British Museum, National Gallery, and Tate Modern — all free. Tower of London costs £33.60 per adult (children 5-15 years £16.80). Buckingham Palace opens for visits August-September for £30. Harry Potter Studio Tour in Watford is wildly popular ($65/adult); book 8-10 weeks ahead. For West End musicals, book through TodayTix app for the best last-minute prices. Pub culture is central to British social life — traditional pubs serve food 12:00-14:00 and 18:00-21:00.
FAQ for American UK travelers
How long does the UK ETA application take?
Standard processing time is 3 business days online. In 95% of cases American applicants receive approval within 24-48 hours. Apply at least 5-7 days before departure — Home Office may in rare cases request additional documentation, extending the process to 5-10 business days. Filling out the form itself takes only 10 minutes when you have your passport, credit card, and travel info ready.
What does UK ETA cost in 2026?
UK ETA costs £20 (approximately $25) per person from April 8, 2026. There are no extra fees if you apply directly via gov.uk or the official UK ETA app. Beware of third-party websites that charge “service fees” up to £80 — these are not necessary and explicitly discouraged by UK Home Office. Use Visa or Mastercard for payment.
How does UK ETA differ from US ESTA?
UK ETA and US ESTA are similar concepts — both are electronic pre-screening for visa-exempt travel. UK ETA costs £20 vs US ESTA at $21. UK ETA is valid for 2 years vs ESTA 2 years (recently changed from 2). Both authorize multiple entries with stay limits — UK 6 months per entry, ESTA 90 days per entry. Apply directly via official government portal — never third-party services.
How much should I budget for a week in UK?
For a week-long UK trip from US: flight $400-800 round-trip (advance booking), hotel $100-200 per night, food $50-80 per day, local transport $20-40 per day, attractions $30-60 per day. Daily budget: $200-380 per person plus one-time UK ETA $20. London is most expensive — Manchester, Edinburgh, Liverpool 25-35% cheaper. Total realistic week-long budget: $1,500-2,800 per person.
How many times can I travel with the same ETA?
UK ETA is a multiple-entry permission valid for 2 years (or until your passport expires, whichever comes first). You can travel in and out as often as you wish during the validity period, with up to 6 months stay per entry. This means you can use the same ETA for weekend trips, summer vacations, and business travel without applying again.
Do I need ETIAS too if visiting Europe after UK?
Yes, if you plan to visit any of 30 European countries (EU + Schengen-associated states), you will need ETIAS as well, launching late 2026. ETIAS costs €7 and is valid 3 years. UK ETA only covers UK (England, Scotland, Wales, Northern Ireland). Both pre-screening systems are required for Americans crossing both jurisdictions — neither replaces the other.