What to do if you can't complete online check-in

The most common causes: wrong data and system overload

Before you panic, close the app completely and reopen it, switch browsers if you're on the website from a computer, or try an incognito window and clear your browser cache: airline systems often get overloaded during peak hours, when thousands of passengers try to check in at the same moment. Then verify that your booking code and surname are typed exactly as on your ID: even one extra space or a different accented letter can lock you out without a clear error message.

When the block is not a bug but a procedure

Tickets bought through travel agencies or flight comparison sites sometimes don't sync with the airline's direct check-in system, and you need to contact the agency or the carrier's customer service to manually unlock your booking. If your trip requires a visa or health certificate, the system can block online check-in until these documents are uploaded or verified at the counter: this isn't a technical error but a security measure with an extra mandatory step. Even an outstanding balance, for extra baggage added later or a fare difference, prevents you from completing the process until you settle the payment.

Tickets bought at the last minute

If you book just hours or a few days before departure, you may find your ticket not yet processed and issued in the airline's system, an internal process that sometimes takes hours even after the confirmation email: in that case just wait and try again, with no action needed. Purchases through lesser-known OTAs or online agencies can suffer from similar delays in passing data to the carrier. If instead the system flags a supposed baggage overweight that hasn't been weighed yet, ask customer service for clarification before paying an extra charge that could be a system error.

If nothing works: support and counter at the airport

First check the airline's service status page, often posted on the website or social media, which flags widespread technical issues that can't be resolved at the individual level. If a payment for an extra service gets rejected by your bank for security reasons, calling your bank directly often unlocks the transaction faster than retrying on the airline site. If everything else fails, customer support via chat, phone or social media often solves faster than expected: the steps to get a useful response are in the guide on how to ask an airline for help. Alternatively, show up at the counter with more time: staff handle this kind of block daily and often solve it in just a few minutes.

If you decide to contact support, first take a screenshot of the error message and note the exact time it occurred: these two details let the operator quickly tell if the problem is just with your ticket or a bigger system failure, speeding up the fix.