Originally Posted by
KARFA
Unless you want to move your flight date -3/+14 days, then selling class shouldn’t be an issue. You just need space in the cabin.
Excellent. I misinterpreted the dates as being how far the flight was from today, not how far new flight was from old flight. (That did seem overly restrictive.)
After I finally got through to an agent they made the change w/o question, booking into D.