Originally Posted by
allset2travel
Red/bold, my emphasis.
Prepandemic, I used SWU to UG from D to First Class (the 77W metal on AA). From recollection only, AA actually UG'd me on 3 contiguous flights (all had F). If I found the exact routing, I'd post an update. BTW, I even had STOP-OVER (more than 24 hours)! I never thought that was possible!
I've also upgraded AA with SWU from GRU-JFK on a DONE5, but that's the only time I've been on the 77W on AA codes. Looks like now only MIA gets the 77W on GRU flights, my flight in August is 772, but I'm on a JL code again anyway, so couldn't upgrade regardless.
I'm pretty sure AA SWUs are for the entire itinerary in one direction up to 3 segments, regardless of stopovers. UA's don't work on stopovers, you do have to use a 2nd SWU in that case.