Cheapest days to fly: Monday out, Tuesday back saves about 14%, and the day you book hardly matters

Most advice about cheap flights comes down to a ritual: book on a Tuesday, fly on a Wednesday. The numbers Google published on October 5, 2026 in its 2026 holiday travel trends post say the ritual is mostly wrong in one place and right in another. The day you book barely moves the price. The days you fly move it a lot. And how many days ahead you book matters most of all.

The day you book: a rounding error

According to Google, Wednesday is the cheapest day to book, narrowly ahead of Tuesday. The saving against Sunday, the most expensive day, is about 1.4%. On a $400 ticket that is roughly $6. Planning your trip around the weekday is not worth a missed fare drop.

The days you fly: the real lever

Google says flying out on a Monday and returning on a Tuesday or Wednesday saves about 14% compared with weekend flights. For domestic trips the saving reaches up to 20% against a Sunday departure and return. On the same $400 round trip, 14% is about $56 and 20% is about $80. These are Google's averages across routes, so a specific route can differ; the way to check is to shift your dates by a day in a fare calendar and watch the total.

The same post notes that nonstop tickets cost 20% more on average than connecting flights. Whether a connection is worth the saving depends on the trip, but it is a number worth testing before you pay for the convenience.

How far ahead: the lowest average fare, by trip

Google reports the number of days before departure at which average prices were lowest, with a range in which fares stayed low:

Trip	Lowest average price	Low-price range
Domestic, general	39 days before	22 to 57 days
Thanksgiving	34 days before	21 to 57 days
Christmas	56 days before	33 to 67 days
Spring break (March or April)	50 days before	29 to 64 days
Summer (July or August)	21 days before	20 to 47 days
Mexico or the Caribbean	43 days before	24 to 69 days
International, general	89 days before	50 to 133 days
Europe	90 days before	starts at 49 days or more

For international trips Google says the price drop inside the range is not significant, and advises booking early rather than waiting. It says Christmas fares bottom out five days earlier than last year, with the best deals between late October and mid-November.

What that means on today's calendar

Today is Monday, October 26. Our arithmetic from Google's figures:

• Thanksgiving (Thursday, November 26): 31 days out. Google's lowest point of 34 days before departure has passed, but we are still inside its 21 to 57 day range. Holding out for a lower price now runs against the data.
• Christmas (Friday, December 25): 60 days out. The lowest average point, 56 days before, falls on October 30. The range runs from 67 days (October 19) to 33 days (November 22), so the window is open now and starts closing in about four weeks.
• Spring break: for a March 20 departure, 50 days before is January 29.

The context makes timing matter more this year. Our Thanksgiving fare coverage tracked sharply higher prices, and Delta guided to fewer Main Cabin seats and higher revenue per seat. Meanwhile TSA screenings ran slightly below last year in October, as we reported in our weekly TSA count: fewer travelers, tighter capacity, higher fares.

Which holiday days are busiest

TSA's 2025 passenger volume page shows last year's Thanksgiving peak was Sunday, November 30, 2025 at 3,134,613 people, with Thanksgiving Day itself the lightest day of the stretch at 1,559,165. That is the same pattern as the fare data: the day after the holiday is crowded and costly, the holiday itself is cheap to fly. Last year is a guide, not a forecast.

A booking plan that follows the data

1. Pick your dates, then move the outbound and return by a day each way in a fare calendar. Prefer Monday out and Tuesday or Wednesday back if you have the flexibility.
2. Set a price alert in Google Flights, which tracks a route for you, and book when the fare is inside the windows above.
3. For holidays, book now rather than waiting for a drop. For summer, the data says waiting longer is fine, with the low point 21 days out.
4. Test a connecting itinerary against the nonstop before you pay roughly 20% more on average.
5. Check the total with bags and seat fees, which the average-fare data does not include.

Before you go: ID

TSA began enforcing REAL ID on May 7, 2025. For a domestic flight you need a REAL ID-compliant license or ID (marked with a star or flag, or labeled "Enhanced"), or a passport. TSA's REAL ID page lists a $45 fee for travelers without an acceptable ID who use its alternative verification. Check your license before you book a trip, not at the airport.

FAQ

What is the cheapest day to fly?

Per Google's data, Monday departures with Tuesday or Wednesday returns save about 14% against weekend flights, and up to 20% domestically against Sunday round trips.

Is Tuesday or Wednesday the best day to book?

Google says Wednesday, narrowly ahead of Tuesday, but only about 1.4% cheaper than Sunday.

How early should I book a Christmas flight?

Google's lowest average point is 56 days before departure, within a range of 33 to 67 days. For December 25 that is October 30.

Are these prices guaranteed?

No. They are averages across routes and years. A specific route can behave differently, so use the figures to set a window and check your own fare.

Sources: Google, "Wheels up: Trends and tips for 2026 holiday travel," October 5, 2026; TSA REAL ID page and passenger volume pages; dollar examples and date counts are our own arithmetic on a hypothetical $400 fare. This is travel information, not a price quote.