I've got a DCA-PHL-ATH booked scheduled to arrive at 905am, and we'd ideally like to make the Aegean flight to HER (our actual destination) at 10am since the next one is not until 1:25pm, but we'd have to book it separate PNR, so obviously that's a bit risky...

Few questions:

1) Any experience with ATH airport/immigration that leads you to believe we'd definitely be able to make or would definitely miss this flight?

2) Anything other than contract lounges available for OW ticket holders?

3) If we do take the 1:25pm, and assuming we do actually land around 9am, is that even remotely enough time to go into Athens and see even 1-2 things at that time of day? [I've never been but my fiancee has]

4) Any other ideas? Anything I'm missing?