You might like to check Future.Travel as we provide ticketing up to time of flight on some airlines. If you get a warning that the flight is not able to be purchased due to time restrictions, you can still chat with us live online to overide the booking system to issue you the ticket. Shortest time to book from contact… 4 minutes. Most last ticket windows for airlines is 1 hour prior to departure, some 2 or 4 hours as they need to do catering and load (weight) management prior to departure within xx hours of takeoff.