You can check in online from 24 hours before departure. This applies to both your outbound and return flights.
If you are unable to check in, please check:
• Whether you are trying to check in within 24 hours of departure
• Whether you have entered the booking number and surname of the main booker correctly
• Whether you have booked or been assigned seats
Online check-in is not available for some destinations. Don't worry, you can simply check in at the airport.