Originally Posted by
flying_geek
If Timatic says its fine the airline will say it's fine. You might want to be prepared to ask them to look it up in Timatic - but once they do - you should not have issues at gates or check in. I have multiple passports - some were expired when those Covid restrictions on destinations started. Once or twice the check in agent had to ask a supervisor comfortable enough to read sentences exceeding 8 words - but other than that - had no issues.
But what does Timatic says about entering/transiting the UK with an expired Greek passport? Isn't this what the issue will be not what's required to enter Greece?