I've noticed somebody has already beat me to it here, but my flight ticket is also available for sale due to not being able to get hold of a match ticket for the Liverpool vs AC Milan Champions League Final on 23rd May.
The details are;
Flight leaves from Liverpool John Lennon Airport at 4.45am on Wednesday 23rd May
Returns 3.30am from Athens on Thursday 24th May
Transfers to and from the stadium are included.
This flight was originally booked through sportops and is ATOL registered. The price is £499 (I will pay for any amendments) but any good, serious offers will be considered.
So if you have a ticket and no flight then this may be the best available option left. Or just give me your ticket :-D