If you are wondering the right time to buy holiday plane tickets, AAA has the mews you need. AAA says September 25th is when most people start considering reservations. It’s best to begin researching now and book the trip by October 27th. For Thanksgiving, the best day to fly is November 25th and the cheapest day to travel is on Thanksgiving Day, November 28th. For Christmas, the best day to fly is Christmas Eve and the most expensive day to take a flight is December 26th. Have you already made holiday travel plans?