Originally Posted by
Anonba
I would advise someone to not leave it any closer than two hours before a flight but i have changed peoples flights when it was a lot closer right upto 45 min before a flight.technically for a international flight out of heathrow a flight should be changed before this point as otherwise its technically a noshow as you would need ti be through security before this point.
Ready to fly is t-35, and checkin about t-45 from memory. I've entered security at t-35m30 seconds before with no problem.
I've changed flights and indeed bought tickets at about t-60 too.