FlyerTalk Evangelist
Join Date: Oct 2005
Location: Ponte Vedra Beach, FL
Programs: DL PM, HH Diamond, Fairmont Prem, SPG Gold, Priority Club Plat/IC Amb, AmEx Plat
Posts: 10,839
1. JFK-SFO/LAX upgrades USED to be easy until the switch the BE 757s with less premium cabin seats.
2. If you want to increase your upgrade chances, you should connect as the other domestic aircraft have a greater ratio of premium to coach seats.
3. While the flights are scheduled for 7+ hours, the flying time is much less.