Originally Posted by
flyerCO
There's a main thread about this. Search for FCM. Basically the system offers at random, and the prices are random. One time you could get really cheap, the next time really expensive, etc.
Also is dependent on being a ticket purchased directly from DL. TA, OTA, Corporate tickets, etc don't get them since requires a ticket reissue.
I see upgrade offers when I check in for my tickets bought through corporate travel agent, but I've never done it. It does look like it will let me use my personal card, rather than my corporate card which paid for the original ticket.
Also, how do complimentary upgrades work? I always get an email with new itinerary from the travel agent. Is this a ticket reissue, or just a seat change? Obviously fare class changes to RU/WU.