Originally Posted by
36902BRF
Separate tickets may complicate your plans. When you attempt to fly to VIE if you are not allowed in, the airline likely won't let you board in IAD even if you have a separate ongoing ticket to ATH. At least that is my understanding.
Well, apparently you are allowed entry into Austria for transit involving a change of transportation:
https://www.austria.org/current-travel-information
TRANSIT through Austria without stop or unnecessary delay. A change in mode of transportation is admissible (e.g. plane to train, bus, taxi, etc.).
Changing from plane to train or bus would obviously be a separate ticket, so I'm hoping a separate flight wouldn't be a problem if it comes to that.