Originally Posted by
VickiSoCal
We cleared immigration and customs in Frankfurt. We showed passport, vaccine card, electronic boarding pass to Santorini and return flight to US from Athens. Our border control officer was Greek and wished us a happy holiday. We had hand baggage only, and yes, in theory we could have left the airport. We then cleared security to renter the A gate area.
Thanks for pointing out that you also showed return flight info. Timatic mentions this but I missed it as it was under the "Visa" section. I have friends who are airline staff and they sometimes wait to book return flights until after arrival. I will mention this to them.