I am starting a DONE3 on Friday:
BKK-LHR-DXB-LHR-BUD-LHR/LGW-DFW-LGA/JFK-SEA-DFW-LGA/JFK-HKG-DEL-HKG-BKK
I will likely make changes to the segments at the back end of the trip, maybe add MNL or change DEL to BOM. After departure, when I make a change to my itinerary, will I have to reissue and pay the $75 fee before my very next flight or can I do the reissue anytime before the new flights? i.e. keep making changes to my Asia segments and only reissue when I get back to hkg to start the Asia segments.