I've booked an open jaw with BA LHR> JFK then STL>LHR in WT+ (booking class T). I'm booked onto BA177 on the 18th September and have been checking for UUA availability every day. Nothing has come up for that flight but there are (or were an hour ago!) 2 seats in CW for the 11.25 flight. I'd be more than happy to arrive earlier into NYC especially if it means I can upgrade.

I know I'll have to call to do it, but before I potentially spend time sat waiting in a queue on the lowly blue line I though I'd ask - will it be possible for me to change my flight time and then UUA to CW (if still available)?

I'm not familiar with the fare rules although when I checked by doing a dummy booking it did seem to suggest I could if I paid any difference in fare.

Thanks in advance.