Most Americans will pay hundreds of dollars more than they need to on Thanksgiving and Christmas flights this year. The people who track this data for a living already know the exact windows to book.
Holiday airfare in the US has jumped sharply in 2026. Domestic flights for Christmas are averaging $452, up 23 percent from 2025. Hopper reports that Thanksgiving round-trips are running at $402 on average, up 31 percent from last year.
For travelers who haven’t locked in flights yet, the situation is urgent. But not hopeless. There is a specific booking window that data analysts point to as the sweet spot, and for both major holidays, that window is either open right now or has just closed.
Here is what the numbers say, and what to actually do about it.
The Data Behind the Deadlines
Google analyzed five years of aggregated Google Flights data to identify when fares hit their lowest point for each holiday period. The findings are more precise than most travelers expect.
For Thanksgiving, the lowest prices typically land around 34 days before departure, with a broader low-price range stretching from 21 to 57 days out.
That means the cheapest Thanksgiving fares of 2026 were, statistically speaking, available around October 21 to 23. If that window has passed, fares are likely already trending upward.
Christmas requires booking significantly earlier. According to Google, fares bottom out 56 days before departure, with the low-price range running from 33 to 67 days out.
That sweet spot has shifted five days earlier compared to last year, and Google says the best deals generally fall between late October and mid-November.
In practical terms: the time to book a cheap Christmas flight is right now, or within the next two to three weeks.
When to Fly, Not Just When to Book
Getting the booking window right is only half of it. The dates chosen for departure and return matter just as much.
Hopper’s data points toward leaving on Monday or Tuesday before Thanksgiving rather than Wednesday, and skipping the Sunday return. Flying on Thanksgiving Day itself or the day after can also bring prices down, though the trade-off is that the crowds don’t disappear, just the cost.
For Christmas, the weekend before the holiday will carry the highest departure prices, with lower fares available on Monday or Tuesday of Christmas week.
Christmas falls on a Friday this year, which means December 27 returns will come with significant price spikes, while midweek flights after the holiday are considerably cheaper.
Hopper advises avoiding December 18 through 20 for departures, as well as December 27 for the return.
The Miles Trap
Frequent flyers who have been stashing miles often assume the holidays are a good time to cash them in. The data disagrees.
Points Path data shows that as cash prices climb during the holiday season, points prices rise in parallel.
That means travelers are unlikely to extract strong value from miles on Thanksgiving or Christmas flights. If redemption value matters, the holiday peak is one of the worst times to use loyalty points on domestic routes.
That said, if a traveler has miles and a fixed set of dates, the holidays can still be a reasonable time to use them, particularly if cash prices feel unacceptable.
Connections vs. Nonstop
Google’s data shows that nonstop flights are approximately 20 percent more expensive on average than itineraries with a connection. That gap is worth considering, especially on higher-cost holiday routes where the absolute dollar difference is meaningful.
For travelers with flexibility on total travel time, adding a layover can offset a significant portion of the fare increase that comes with booking later in the window.
International and Warm-Weather Escapes
Not everyone heads home for the holidays. For those skipping the domestic scramble entirely in favor of somewhere warmer or further afield, the booking math shifts.
For trips to Mexico or the Caribbean, prices tend to bottom out around 43 days before departure, with a low-price range of 24 to 69 days out.
International flights more broadly tend to reach their lowest average fares around 89 days before departure, though Google notes the price drop is relatively small, and the stronger advice is simply to book early rather than wait for a significant reduction.
The Day-of-Week Myth
One piece of conventional wisdom that keeps circulating is that booking on a specific day of the week, usually Tuesday, guarantees lower fares.
Google’s analysis found that this is largely a myth, though Sunday does register as the most expensive day to book by a small margin. Wednesday has edged out Tuesday as the cheapest booking day according to Google’s latest data, but the difference is marginal.
The booking window matters far more than the day of the week within that window.
Weather and Disruption Risk
Data and strategy only go so far. The West Coast is particularly susceptible to weather disruptions during the holiday season, and travelers routing through or out of coastal hubs should factor that in when choosing itineraries.
Detailed disruption forecasts are typically published by travel analysts three to four weeks before Thanksgiving and Christmas.
Setting up a price alert on Google Flights is a practical step for anyone still in the research phase. It removes the need to check manually and surfaces fare movements as they happen, which is especially useful when the booking window is this tight.
The Bottom Line
The data is clear, and the window is narrow. Google’s core recommendation is to book holiday flights as soon as possible. October is when Thanksgiving fares have historically been at their cheapest, and that month is nearly over. Christmas fares are entering their low-price zone this week.
Waiting to see if prices drop further is a gamble that, statistically, has not paid off for most travelers. The experts who watch this data year-round are pointing in one direction: book now.