Hi frequent flyers, I'm a bit confused on how mileage upgrade works on my itinerary, which looks like this:
YYZ-AA-DFW-JL-HND-JL-HKG
I unserstand only AA-operated segments are available for mileage upgrades, but since all the segments are on the same PNR, AA wants more miles as if I'm upgrading the entire trip. I'm wondering if there's a work around so I could only pay for the upgrade on the AA segment? TIA for your expertise!