As the headline says, I have to fly to Austria for work on Sunday. I went to the US embassy to expedite my new passport as it's expiring in April. They took my current valid one as collateral while they create my new passport.
I am a holder of a German permanent residence permit card. Will that be enough to fly? I think the last time I flew in the Schengen region, nobody asked for any ID but I am worried they won't let me on the plane with my valid perm residency (which is the equivalent of an American green card).