How many months out is cheapest to book flights?

Timing plays an important part. Specifically, plane tickets usually don't get cheaper closer to the departure date. Instead, flights tend to be the most inexpensive when you book between four months and three weeks before your departure date.



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Generally, you should book domestic flights one to four months in advance. For international flights, you should book at least six months in advance. You'll want to give yourself more time for research for the latter than when traveling on domestic itineraries.

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Google says that if you're booking a domestic flight, the prices are generally at their lowest between 21 and 60 days before your trip. However, Google notes this may not apply to your specific destination.

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But generally, the best prices tend to drop off once the flight is less than three weeks away. If it's 21 days before you plan to travel and you haven't seen a flight deal to your destination, you'll want to stop waiting and book the airfare available.

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More specifically, Tuesday at about 15:00 eastern time. This is because many airlines release weekly sales early on Tuesday, which creates competition between airlines to match prices.

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The cheapest months to travel are:
  • November – early December.
  • Late January – March.


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Bottom line. Surprisingly, there is very little evidence that online travel sites are raising prices the more that you search for a specific trip. In fact, they tend to show lower prices to logged-in users.

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Is it cheaper to book a flight at the last minute? We've said this before, but it's worth repeating at the outset—no, it's really not cheaper to book a flight at the last minute. Yes, last minute travelers used to score the occasional fare so low it might have induced shock, but that's no longer the case.

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Time your booking right
“For domestic flights, if you're talking peak season, it's about three to seven months in advance,” he says. “For international flights — [it's] four to 10 months.”

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Tuesdays and Wednesdays are the cheapest days to fly domestically. The cheapest days to depart if you're flying within the U.S. are midweek — generally Tuesday or Wednesday. For economy tickets, Tuesdays are about 24% lower than peak prices on Sundays, which translates to savings of about $85 per ticket.

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Can you book a flight more than a year in advance? On most airlines, the answer is no. You can refer to the chart above for the exact booking window data for each airline, but most are between six and 11 months before your departure date.

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Buy your tickets at the right time (to the extent possible). Airfares flex like crazy, but in general it's wise to start looking for international flights at least four to six months before your trip, especially for travel in spring, summer, or fall.

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Tuesday Around Midnight is the Cheapest Time to Book
In general, flights were slightly cheaper at midnight earlier in the week (Monday through Wednesday). However, this is only applicable to about 1.6% of U.S. markets, meaning that it's not likely you'll find the same savings on your specific route.

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Cheap days: In the U.S., Tuesday, Wednesday, Saturday are usually cheapest. For international travel, weekdays are usually cheaper than weekends. Expensive days: Fridays and Sundays usually cost more, especially in the U.S.

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