Planning a trip to London?

Maybe you're heading to Edinburgh, exploring Wales, visiting Northern Ireland, or building a larger UK itinerary.

Before you start thinking about hotels, restaurants, transportation, and everything you want to see, there's another part of your trip that deserves attention:

Can you actually enter the country with the travel documents you currently have?

Entry requirements are an important part of destination research, and the United Kingdom's Electronic Travel Authorisation—or ETA—is a good example of why travelers need to check those requirements before every international trip.

The UK has now fully implemented its ETA requirement for eligible travelers who previously could travel to the UK without obtaining a visa or other advance permission.

For many travelers, including eligible U.S. citizens, that means there is now an additional step to complete before traveling to the UK.

This isn't something to worry about.

It's something to put on your checklist.

Preparation is not fear.
It's how you travel with confidence.

What Is the UK ETA?

An Electronic Travel Authorisation is a digital permission to travel to the United Kingdom.

Each eligible traveler needs their own ETA, including children and infants.It is not a visa, and receiving an ETA does not guarantee that you'll be admitted into the UK when you arrive. You still need to meet the applicable UK entry requirements.

Think of the ETA as permission to travel to the UK border, where the normal entry process still applies.

The requirement generally applies to eligible visitors who do not need a visa for short stays of up to six months and do not already have another UK immigration status.

British and Irish citizens do not need an ETA. Other exemptions also exist, so don't assume the requirement applies—or doesn't apply—based solely on where you live.

Check the official UK government guidance for your nationality and circumstances before traveling.

What U.S. Travelers Should Know

For eligible U.S. travelers visiting the UK without a visa, the ETA is now part of the pre-travel process.

And this is where I want travelers to change their thinking.

Don't discover entry requirements while checking in for your flight.

Research them while you're planning the trip.

As of October 2026, a UK ETA costs £20 and generally allows multiple journeys to the UK during its validity period. It remains valid for up to two years or until the passport connected to it expires, whichever happens first.

The ETA is digitally linked to your passport.

That creates one particularly important rule:

Travel using the same passport you used when applying for the ETA.

If you replace or renew that passport, don't assume the authorization automatically follows you to the new document. Recheck the requirements before your next trip.

Don't Wait Until the Last Minute

The UK government says applicants usually receive an ETA decision within one day, although it can take up to three working days.

You must receive confirmation that your ETA has been approved before traveling.

That's why I recommend making the ETA part of your pre-travel checklist and completing the application well before departure.

Don't create an unnecessary travel-day problem because something that could have been handled ahead of time was left until the last minute.

Use the Official Application Process

This is another place where destination research matters.

The UK government recommends applying through the official UK ETA app or through GOV.UK.

Third-party application services exist, and the UK government specifically notes that other services may charge more than the official government fee.

Before entering passport information, personal information, or payment information into a website, verify where you are.

Look at the domain.

Understand who you're providing information to.

Don't assume the first sponsored search result or website that looks official actually is the government application portal.

That's not just an ETA lesson.

That's a good digital travel habit.

Official UK ETA information and application guidance

Check Your Passport Before You Apply

Your ETA is linked to the passport used during the application.

So your passport review should happen before your ETA application.

Make sure:

• Your personal information is correct.

• The passport will remain valid for your trip.

• You haven't already planned to renew or replace it.

• Your airline reservation information matches your travel documents.

And here's an important correction to travel advice you may see online:

You may encounter blanket recommendations saying your passport needs at least six months remaining to visit the UK.

That is not the general UK visitor requirement.

Passport requirements depend on your circumstances, but travelers should verify the current UK rules rather than relying on generic international-travel advice.

The broader lesson is simple:

Check the actual entry requirements for the country you're visiting.

Don't assume one country's passport rules apply everywhere.

Entry Requirements Are Part of Destination Research

When people hear “destination research,” they often think about:

Weather.

Hotels.

Restaurants.

Neighborhoods.

Transportation.

Those things matter.

But destination research also includes understanding what is required to legally enter and travel within the country.

Before an international trip, check:

• Passport requirements

• Visa or travel authorization requirements

• Length-of-stay limitations

• Customs requirements

• Health or vaccination requirements when applicable

• Rules affecting medications you're carrying

• Driving requirements if you plan to rent a vehicle

• Any significant changes announced before departure

That's why I consider entry requirements part of your overall travel safety plan.

My Guide Know Your Destination: Why Destination Awareness Is Part of Every Travel Safety Plan goes deeper into the research I recommend completing before a trip.

Mike's Travel Tip: Verify Before You Fly

Travel rules change.

Websites get outdated.

Old social media posts continue circulating.

And advice from someone who visited a destination two years ago may no longer apply to your trip.

So here's a habit I recommend before international travel:

Go back to the official government source shortly before departure and verify the requirements one more time.

Don't rely entirely on the research you completed six months ago when you booked the trip.

For UK travel, that means checking GOV.UK.

For another destination, identify that country's official immigration, embassy, or government source.

Your travel checklist tells you what to check.

The authoritative source tells you what's currently required.

Don't Let One Document Become a Single Point of Failure

The ETA itself is digital, but I still recommend keeping your important travel information organized.

Depending on your trip, that may include:

• Passport information

• Flight details

• Hotel address and phone number

• Travel insurance information

• Emergency contacts

• Copies of important travel documents

• Embassy or consulate information when appropriate

Your phone is an excellent travel tool.

But as we've discussed throughout the Travel with Confidence Guides, it shouldn't become your only source of important information.

This is also where Travel Smart, Not Scared: How to Build a Personal Travel Safety Plan can help you think through backup access to information before your trip.

What About Connecting Flights?

If you're connecting through a UK airport, whether you need an ETA depends in part on whether you pass through UK border control.

Eligible travelers who pass through UK border control generally need an ETA, even if they're continuing to another destination.

Travelers who remain airside and do not pass through UK border control are currently exempt from the ETA requirement.

Before departure, confirm your connection arrangements with your airline and check the latest UK government guidance. Transit exemptions can change.

Add Entry Requirements to Your Travel Routine

The larger lesson here isn't simply:

“Remember to get your UK ETA.”

It's:

Make entry requirements part of every international travel plan.

Before your next international trip:

1. Check your passport.

2. Determine whether you need a visa or travel authorization.

3. Apply through the appropriate official source.

4. Confirm that your travel documents match.

5. Recheck the requirements shortly before departure.

That process should become as routine as booking your hotel or checking your flight.

Because discovering that you're missing a required document at the airport isn't an adventure.

It's a preventable problem.

Prepare Before You Head to the UK

London and the rest of the United Kingdom offer incredible history, culture, food, neighborhoods, and experiences.

The ETA doesn't need to make your trip more complicated.

It simply becomes another item in your planning process.

Research the requirement.

Use the official source.

Apply ahead of time.

Verify everything again before departure.

Then go enjoy the trip.

For help organizing the rest of your pre-travel planning, download my Free Pre-Travel Checklist and use it to review your documents, destination research, emergency contacts, transportation plans, and other important details before you leave.

Preparation is not fear.
It's how you travel with confidence.

Last reviewed: October 9, 2026
Entry requirements, fees, and eligibility can change. Always verify current requirements through GOV.UK before traveling.