This was a very tricky set of flights--I had combined two award bookings, one on Korean Air from UB to Seoul and onward to Tokyo, and another on AA from Seoul to PHL via ORD. Both bookings were partner awards, the first using DL miles and the second using BA miles. I couldn't get through to DL in time to even try to change the Korean Air flights (being stuck in the mobile-free wilds of Mongolia). Even so, Korean Air only flies from UB to Seoul a few times a week, so I couldn't have gotten out quickly. And BA doesn't let you change or cancel partner awards at all--although after about 45 desperate, pleading minutes on the phone with the BA EC Gold desk, they did in fact re-book me on the next available AA F seat from Tokyo...three days later. I could have stayed in UB or Seoul or Tokyo for three days, but I was in no mood to do that, and I just wanted to get home. I somehow managed to scare up a Y seat from Seoul to JFK on Korean, then walked up to the MIAT desk in UB and paid $400 cash to get to Seoul.