Waiting until December to book your Christmas flight is looking like an expensive mistake. Google Flights has crunched five years of fare data for departures from the United States, and its latest analysis (published 5 October 2026) pins down the cheapest booking windows for the big holiday season dates.
For Thanksgiving, which this year falls on 26 November, domestic fares tend to bottom out around 34 days before departure, with the sweet spot running from 21 to 57 days out. In practice, that means October is the month to lock in your tickets — and the window is already open.
Christmas requires even more forward planning. The lowest fares typically show up about 56 days before departure, five days earlier than last year's advice, with the best window stretching from 33 to 67 days ahead. Book between late October and mid-November for the strongest odds of a bargain.
As a general rule, the data suggests domestic flights are cheapest roughly 39 days out (with 22 to 57 days as the broader range), while international trips reward much earlier moves — around 89 days in advance. Heading to Europe? Aim for about three months ahead. Mexico and the Caribbean offer a bit more flexibility, with fares tending to drop around 43 days before travel. Google's overall message for anyone with fixed dates is simple: book early rather than gambling on a last-minute drop.
Timing your travel days matters too. Flying midweek instead of on weekends shaves roughly 14% off ticket prices, and domestic travellers who avoid Sundays can save up to 20%. Another lever: connections. Nonstop flights cost about 20% more on average than itineraries with a stop, so if you can stomach a layover, the savings are real.
One piece of folk wisdom, however, doesn't hold up. The day of the week you actually buy the ticket has little effect on the price, according to Google — so there's no point waiting for a mythical Tuesday deal. Your travel dates and how far in advance you book matter far more.
Google also points travellers to its price-tracking tools, which flag fare changes and compare current prices with historical trends — useful if you're watching a specific route and can act fast when it dips.
Who should care: anyone in the US planning Thanksgiving, Christmas or New Year travel, especially those who left things later than they'd like to admit. Flexible travellers still have room to save by shifting dates or accepting a connection; anyone locked into school-holiday dates should treat the Christmas window — 33 to 67 days out — as a deadline that's nearly here.
