The "sweet spot" is roughly 2 to 8 months out, though Expedia data suggests international travelers can find substantial savings even 8 to 15 days in advance.
The "best" day to buy a flight has shifted significantly in 2026. While the old rule of "Tuesday at midnight" is officially a myth, new data from Expedia's 2026 Air Hacks Report and NerdWallet indicates that has emerged as the most affordable day to book both domestic and international flights. The Best Day of the Week to Book best day of the year to buy airline tickets
Tuesday is the cheapest day to fly domestically, saving roughly 14% compared to Sunday departures. Wednesday is also highly competitive. The "sweet spot" is roughly 2 to 8
Booking on a instead of a Sunday can save you up to 8% on your airfare. This shift is largely driven by a decrease in business travel at the end of the week, opening up more leisure-focused deals. Cheapest Day to Book: Friday. Most Expensive Day to Book: Sunday. Optimal Booking Windows (The "Goldilocks Zone") The Best Day of the Week to Book
Tuesday is also the least crowded day at airports. Smart Booking Tips
Aim for 15 to 30 days before departure. Some data suggests prices bottom out around 44 days out.
January tends to offer the lowest fares for travel within the U.S..
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