Originally Posted by
AlexBelt
Interesting, I have made a lot of miles upgrades in advance in the past (Toronto 20K, JFK 30K, SFO 35/55K, etc.) without any issue. That's true that it depends on the availability.
What has been your experience on the JFK route? Best times to snag the upgrade? Etc.
I know JFK is their most profitable route... therefore the most difficult
Any advice helps, thanks!