UK ETA outage June 2026: what went wrong and the lesson

The UK’s Electronic Travel Authorisation portal went down on 3 June 2026, leaving some travellers unable to get the approval they needed to board. Airlines, trains and ferry operators refused passengers whose applications were stuck in processing rather than approved. The Home Office confirmed the problem, technical teams fixed it within days, and the system is back online. But the episode is worth understanding, because the same vulnerability sits inside every pre-travel authorisation system, including ETIAS when it launches later this year.

What went wrong on 3 June?

High traffic hit the ETA portal hard. The application service began showing “currently busy” messages, with some applicants waiting over an hour just to get started. Those who did submit found their applications stuck in processing rather than producing an approval. A confirmation email saying the application was received counted for nothing at the boarding gate.

The UK operates a strict “no permission, no travel” policy. Carriers are legally required to check that every qualifying passenger holds a valid, approved ETA before they board. A processing screen is not valid. Passengers without an approved ETA were turned away.

Who needs a UK ETA, and what does it cost?

From 25 February 2026, nationals of around 84 countries need a UK ETA for any trip to the United Kingdom that would not require a full visa. That includes US, Canadian and Australian passport holders, and most European nationalities. British and Irish citizens are exempt. The ETA costs £20 (as of April 2026), is valid for two years or until the passport expires, and covers unlimited trips of up to six months each. You apply through the official UK government site at gov.uk/eta or the UK ETA mobile app.

If you are planning a trip to Europe rather than the UK, the relevant system is ETIAS, not UK ETA. The two are run by different governments and cover different destinations entirely.

How early should you apply?

Official UK guidance says at least three working days before travel. Most applications clear in minutes automatically, and that speed has led many travellers to apply the day before, or even on the morning of departure. The June outage is a direct argument against that habit.

• System overload. Peak periods push more people to apply at once. A portal under heavy load slows down or fails. That is what happened on 3 June.
• Manual review. A small number of applications are flagged for human review rather than automatic approval. That can take up to three working days. If it happens the night before your flight, you have no buffer.
• Input errors.Entering a passport number incorrectly means starting again. With a week to spare that’s a minor inconvenience. On departure day it can cost you the trip.

What to do if the outage caught you out

If you missed travel because of the June portal failure, contact your carrier and your travel insurer. Airlines tend to treat government system failures as outside their control, so a refund is not automatic under standard compensation rules. Your travel insurer may have a travel disruption clause that applies. Keep all documentation, including screenshots of any error messages and your application reference number.

Why this matters for ETIAS too

ETIAS is the EU’s pre-travel authorisation for visa-exempt visitors to 30 European countries, expected in Q4 2026. Like the UK ETA, it will be applied for online before departure, linked digitally to your passport, and verified by carriers before you board. The enforcement model is the same.

When ETIAS launches, the portal will face an enormous surge from travellers who have never heard of it and are trying to apply at the last minute. The UK ETA outage is a useful preview of what that looks like at scale. Apply well before your trip. Use the ETIAS checker now to confirm whether your nationality will need one, so you are not surprised when the system opens.