Change flight details
You'll need to visit your Trips and bookings page. There you'll see your bookings listed in 6 blue capital letters with a date attached.
Tap on the booking you want to change.
You'll see a list of options. Select 'Change flight details'. Follow the prompts and add your new details – make sure you save your changes.
You'll be sent an updated confirmation.
You can change your flight details right up to your booked arrival time.