Mixing AA/US roundtrip: how to upgrade?
Looking at a DFW-CLT-DFW roundtrip. Choosing flight times, my first choice would put me on AA for the outbound, US for the return. As a 25K elite on both airlines, I'd like to try to upgrade both directions.
Booking 2 one-ways would cost a lot more in this case.
Can I put my AA number on the reservation, fly the outbound, then call to switch numbers? Any other ideas?