You can select your seat via Manage Booking anytime up to 24 hours prior to your flight departure, subject to flight eligibility and fare type.
Customers travelling on certain Economy fare types who are required to pay an additional fee for seat selection can do so via Manage Booking up to 48 hours prior to their flight departure.
If seat selection via Manage Booking is unavailable or you wish to select your seat free-of-charge, you may do so via Online check-in. Please note: If you are any Cathay member, or oneworld Ruby, Sapphire or Emerald member, priority online check-in will be open from 48 hours before your flight departure time for all passengers in your booking. Otherwise, online check-in opens from 24 hours before your flight departure time.