For most bookings, to add baggage, seat selection and other in-flight amenities to your booking you can simply copy your airline confirmation code and head to the airline's website or mobile app to select these extras.
If you would like to select your seats in advance there may be an additional charge depending on the airline. If you are travelling with multiple passengers, Hopper recommends that you pre-reserve your seats in advance to ensure that you are seated next to each other. If you do not select them in advance, there is no guarantee that you will be seated next to each other. Otherwise, your seats will be assigned when you check-in for your flight. *Please note that advanced seat selection is not available for all airlines and is subject to availability.
To add baggage to your reservation, there may be an additional charge to do so. Every airline's policies of carry-on and checked luggage are different so we recommend verifying the specific policies that apply to your booking.