I signed up for the challenge knowing I would be booking a number of flights to travel over the next 3 months. However, after booking, I realized I was sloppy in my calculations and underbooked my fares on a few trips. Is there an option to change a ticket to a higher price fare type without incurring a change fee?
(i.e. change a flight booked as Blue to the same flight as Blue Plus)
I know one can always refare within 14 days after booking when the price drops, but I don't recall anyone seeking to pay the fare difference for a higher priced flight.