Do I Need a UK ETA Just to Connect Through a UK Airport?

Meta description: When a UK Electronic Travel Authorisation is required for visits and layovers, and the specific exception for airside transit at Heathrow and Manchester.

Short answer

As a rule, yes, most non-UK/Irish nationals who don’t already hold a UK visa need an ETA to visit the UK, and airlines have been required since 25 February 2026 to check for it before boarding — but if you’re making a genuine airside connection through Heathrow or Manchester and never pass UK border control, you generally don’t need one. The moment your itinerary requires you to collect baggage, clear UK customs, or exit to landside — including on separately booked tickets — the transit exception no longer applies and you need a valid ETA like any visitor.

If this is happening right now

1. Check your ticket type first: if your inbound and outbound flights are on one through-ticket with baggage checked to your final destination, and you’re transiting Heathrow or Manchester without leaving the secure zone, you likely don’t need an ETA for that connection.
2. If your flights are booked separately (different airlines, different bookings, or you must collect and re-check baggage), assume you need a valid ETA before you fly, since you’ll pass through UK border control to reconnect.
3. If you’re at check-in now and told you lack a valid ETA, ask the airline specifically whether your routing counts as airside or landside transit — this is the deciding factor, not just where you’re finally headed.

What this is

The UK ETA (Electronic Travel Authorisation) is a pre-travel digital permission required for most non-UK/Irish visitors who don’t need a full visa, checked by airlines, ferry, and train operators before boarding since 25 February 2026.

• Examples that count: a visa-exempt visitor flying into London Gatwick for a holiday; a visa-exempt traveler connecting through Heathrow on separately booked tickets who must collect and re-check baggage.
• Counter-example — this does NOT include: a genuine airside-only connection through Heathrow or Manchester on a through-ticket, staying in the secure international transit zone without crossing UK border control — this specific scenario does not currently require an ETA.

Quick-check table

UK ETA: visit vs. transit at a glance

First actions before you fly

1. Confirm your transit type with your airline or a routing tool before assuming the airside exception applies — it depends on the specific airport, your ticket structure, and whether bags are checked through.
2. If in doubt, apply for the ETA anyway. It’s valid for multiple journeys over an extended period (not single-use), so applying even for a connection you believe is exempt removes the risk if your routing changes.
3. Apply only through the official gov.uk portal or the official UK ETA app — third-party sites can charge well above the government fee; see Official or Fake? How to Verify an ETA, Visa or Arrival Card Site.
4. Apply with enough lead time before departure, since airlines began enforcing checks at boarding from 25 February 2026 — a same-day surprise at check-in is avoidable with early application.

Questions travelers ask

How much does a UK ETA cost and how long is it valid? As of an April 2026 fee change, the standard cost is £20 (up from £16), and it’s typically valid for multiple journeys over an extended period — commonly cited as up to two years or until your passport expires, whichever comes first.

Does the ETA replace a visa? No. It’s for visitors who don’t need a visa. If your nationality requires a UK visa, you need that visa, not an ETA.

Which airports currently allow airside-only international transit? Heathrow and Manchester are the UK airports generally cited as offering international-to-international transit without passing through UK border control. Other UK airports typically require passengers to clear border control even on a connection.

What happens if I don’t have a valid ETA at boarding? Airlines are required to check for a valid ETA before allowing boarding as of 25 February 2026, so you may be denied boarding at the departure airport rather than being turned away only on arrival.

Can I apply for a UK ETA at the airport if I forgot? This isn’t the intended process — the ETA is meant to be secured before travel, and relying on last-minute options is risky. Apply as early as your travel planning allows.

Does a valid ETA guarantee entry to the UK? No — like similar systems elsewhere, an ETA is a pre-travel authorization to board and seek entry, not a guarantee; a border officer still makes the final entry decision.

If this actually happens to you (Travel AI Rescue)

A confusing transit rule at check-in, right when you’re about to board, is a classic time-pressure moment — Travel AI Rescue is built to walk through exactly this kind of routing question using your actual itinerary.

Bundled with the Basic or Premium guarantee tier at eSIM checkout — 40% cheaper bundled (Basic $2.20, Premium $4.40; $3.70/$7.40 standalone). AI-drafted guidance, not a final medical/legal/immigration determination — contact local police, ambulance, or your embassy first in a real emergency.

• See Travel AI Rescue →
• Choose your eSIM plan →

Sources (checked 2026-07-20)

• UK Home Office, “Electronic Travel Authorisation (ETA) factsheet – April 2026” — homeofficemedia.blog.gov.uk
• GOV.UK, “EU Entry/Exit System” (for cross-reference on UK vs. EU systems) — gov.uk/guidance/eu-entryexit-system
• Rick Steves Travel Forum, “UK ETA to be enforced from 25 February 2026” (cross-reference for enforcement date) — community.ricksteves.com
• Arletti Partners, “UK ETA: cost to rise from April 2026” — arlettipartners.com

Update trigger: re-check close to your travel date if the UK changes which airports qualify for airside transit, or adjusts the ETA fee or validity period again.

Related pages: Worldwide Travel Trouble hub · EES vs ETIAS in 2026 · Transit Country Rules When You Do Not Leave the Airport