UK ETA for Transit Passengers: Do You Need One for a Layover?

Transit, exemptions and application guidance checked against GOV.UK on 12 October 2026. This is general information; confirm your actual connection with your airline before travel.

The key question is not how many hours you spend at Heathrow. It is whether your connection requires UK border control. A short transfer can be landside; a long wait can stay airside. Your passport and existing documents then determine the relevant permission.

Airside and landside: the distinction that matters

Airside means remaining in the international transit area without passing UK border control. Landside means crossing that control, for example to collect baggage, change airports or leave the airport. Ask the airline which route your booking uses. Do not infer it from a terminal number alone.

The official ETA exemptions include airside transit. There is no separate list of a few favoured nationalities that alone get this ETA exemption. However, some passengers may need a Direct Airside Transit visa: the visa question must be checked separately.

Which permission should you check?

Use GOV.UK Check if you need a UK visa with the passport and itinerary you will actually use. An ETA is not an alternative for a traveller who needs a visa and is not ETA-eligible.

When a transit visa may be needed

GOV.UK transit guidance distinguishes the Direct Airside Transit visa from the Visitor in Transit visa. The latter may be relevant when crossing border control and leaving within 48 hours. A longer stay or a different itinerary can require another visitor route.

There are document-based exceptions and conditions. Do not assume every visa national must buy a transit visa, or that any US visa or residence card automatically exempts its holder. Check the exact document, validity and route in the airside guidance and landside guidance.

Travel involving Ireland, the Channel Islands or the Isle of Man can have different visa-route requirements. Follow the official guidance rather than treating those journeys like every other international transfer.

Transfers at Heathrow and other airports

A change of terminal does not automatically mean you pass immigration. Equally, a same-terminal booking is not proof you stay airside. Through-checked baggage, airline arrangements, check-in requirements and separate tickets can change the route.

Ask the operating airline: are bags checked to the final destination, do you need to collect them, can you obtain the onward boarding pass airside, and does the connection remain within the international area? If an overnight connection is involved, confirm that the intended airside route is available.

Illustrative example, not a reported passenger case: one traveller follows an airline-confirmed airside transfer and does not need an ETA for it, but still checks the transit-visa requirement. Another has to collect a bag after border control and checks landside permission. The length of the layover alone does not settle either case.

Landside travellers can still be exempt from ETA

British and Irish citizens and people holding relevant UK immigration permission are among those who do not need an ETA. Other exemptions apply. An eligible Irish resident entering from Ireland, Guernsey, Jersey or the Isle of Man should check the specific residence exemption and proof requirements. It is not a blanket exemption for every journey through Ireland.

Children normally need individual permission unless a specific exemption applies. A parent's ETA does not cover a child. Check each traveller's passport and circumstances.

If you need an ETA: apply before travel

Start at GOV.UK Apply for an ETA, using its official app or online links. The government fee is £20 per application. Prepare the application passport, email address, required photos and accepted payment method. Each approval is linked to a passport.

Allow at least three working days before travel, with more time where your plans depend on the outcome. Do not translate working days into a guaranteed 72-hour deadline. You can submit online from a location with internet access, but there is no airport desk that guarantees immediate approval. Submitting at check-in is not permission to board.

Wait for the approval email. If no decision arrives after three working days, check junk mail and use official UKVI help. A paid assistance service cannot obtain a faster government decision.

Checking an existing ETA

GOV.UK Check your ETA checks existing permission and expiry using the application passport. It cannot track a recent application that has not yet resulted in an ETA. If you renew your passport, you need a new ETA on that passport.

If the connection changes

An operational change may turn an airside plan into a landside one. Ask the airline about the revised route and check the permission it requires before proceeding. Do not assume the old itinerary, a receipt or a pending application authorises border crossing.

Where permission is unresolved, discuss an alternative itinerary with the carrier. ETA approval, when required, still does not guarantee admission at the border.

Key takeaways

• Airside transit without UK border control is exempt from ETA.
• That does not settle whether a transit visa is needed.
• For landside transit, check nationality, existing documents and exemptions.
• Confirm the connection with the airline, not just the terminal number.
• Obtain required permission before travel; a pending application is not approval.

Read our official application steps guide and UK ETA and ETIAS comparison for the separate application and destination questions.