If Aer Lingus is not letting you check in online, there could be several common reasons, each related to booking details, travel documents, or specific flight rules. One of the main reasons passengers are unable to check in online with Aer Lingus is that their booking requires additional verification, such as passport checks, visa validations, or other entry requirements for the destination country. This is often the case for flights to or from the United States, where enhanced security procedures apply. In such cases, online check-in may be restricted or limited, and passengers are advised to complete check-in at the airport. Another reason why Aer Lingus may block online check-in is if there are incomplete or incorrect details in your booking. For example, if your name does not match your passport exactly, or if passport details haven’t been added to the booking for international travel, the system may prevent you from checking in online.
Technical issues are another possibility. Sometimes, system maintenance or temporary errors on the Aer Lingus website or mobile app can affect the online check-in function. If this occurs, it is often best to try again later or use a different device. Additionally, if you booked your flight through a third-party travel agency, the information may not be fully integrated into the Aer Lingus system, which can cause problems when trying to check in online. In such cases, contacting Aer Lingus directly or completing airport check-in might be necessary.
Another common reason for check-in issues is group bookings or special service requests. If your booking includes more than nine passengers, or if you’ve requested special assistance such as wheelchair service or unaccompanied minor travel, online check-in may not be available. These types of bookings usually require manual review and assistance from airline staff. The same applies if there are any payment issues or pending confirmations, such as unpaid baggage fees or seat selections that haven’t been finalized. These must be resolved before check-in can proceed.
Certain fare types may also restrict online check-in access. For example, Saver fares might have limitations that require passengers to check in at the airport, especially when additional identity verification is needed. Also, if you have added sports equipment, oversized bags, or pets to your reservation, the system may direct you to complete check-in at the airport instead.
In rare cases, a flight schedule change or cancellation can prevent the system from processing online check-in. If your flight time has been updated or rescheduled, Aer Lingus may require airport check-in to confirm your acceptance of the new schedule.
In summary, Aer Lingus may not allow online check-in due to incomplete travel details, security regulations, group or special bookings, technical problems, third-party reservations, or payment issues. To avoid issues, make sure your travel documents are up to date, all information in your booking is correct, and any added services are paid and confirmed. If online check-in is unavailable, arriving early at the airport will ensure you have enough time to check in and complete all necessary steps before your flight.