Originally Posted by
DCAKen
I've been checking the upgrade offer on a JFK-LHR flight from J to F in early April. It was in the 2K range for a while, then dropped to $623 last week. Yesterday it went up to $1600, then back down to $700 today.
My J to F offer on the same route for next week has been at $616. Two seats for sale and the fare difference is $11k. Jumped to $3.5k when it went down to one seat. Back to $616 when it went back to two seats available.