Originally Posted by hopel

I'm heading from IAD to PRG on Sunday Dec 8. I am willing to connect anywhere in Europe though I would prefer to skip FRA and CDG. My intention is to use an SWU courtesy of my traveling companion, a 1K. Right now, no flights show upgrade space, yet C looks wide open on all of the flights I've looked at. Is this common? Should we book now and hope for upgrades to clear, or wait to see if anything opens up? What routing makes most sense? AMS flights are going for Y or M though most seats are not assigned.