The cheapest months to book a flight in 2026

The cheapest months to book a flight in 2026

The "book on Tuesday at midnight" rule is dead. New 2026 data from Expedia and Hopper shows when prices actually drop, and the answers will surprise you.

There's a piece of travel advice that won't die. "Book your flight on a Tuesday at midnight." It made some sense in 2012. Airlines genuinely refreshed their fare tiers once a week and the cheap inventory landed in a predictable window.

That world is gone. Modern airline pricing is updated continuously, sometimes thousands of times per day, based on demand, competitor pricing, and how full the plane is selling. The Tuesday rule is no longer in the data. Here's what is.

The cheapest month to fly: it depends on where

For international travel in 2026, August is the cheapest month, with average fares 29 percent below December prices.1 For domestic U.S. flights, January takes the title, with post-holiday demand drops pulling prices down for nearly the whole month.1

February runs a close second on both. By mid-March, spring break demand pushes domestic prices back up, especially to Florida, Texas, and Arizona.

Generally speaking, the cheapest months by category:

Cheapest domestic: January, February, early September

Cheapest international (Europe): late October, November, January

Cheapest international (Caribbean): May, September, early December

Cheapest international (Asia): mid-November, January, February

The most expensive months to avoid

July and December are the most expensive months across the board. Summer vacation and holiday travel push fares to their annual peaks. Spring break in March drives a smaller spike on routes to traditional spring break destinations.

If you must travel during peak periods, book earlier than usual. The Points Guy recommends booking summer flights two to three months ahead for domestic and four to six months for international.2

The new booking window

Here's the part that surprises most people. The "book months in advance" wisdom is also wrong in 2026.

Expedia's 2026 Air Hacks Report found that the most affordable booking window for domestic economy flights is 15 to 30 days before departure. Booking in that window averages $130 cheaper than booking six months out.1 For international flights, the sweet spot is 31 to 45 days before departure, saving an average of $190 over booking six months ahead.

This isn't because last-minute is suddenly cheap. It's because airlines are using continuous pricing to extract maximum revenue from people who book early and from people who book at the last minute, while leaving a window in the middle where prices dip to fill the plane.

Important caveat: this applies to economy seats on standard routes. For peak holiday weeks (Christmas, July 4), the cheap-window principle doesn't hold. Book peak travel earlier.

The day-of-week rule, updated

Forget Tuesdays. The new cheapest day to both book and depart in 2026 is Friday. Yes, Friday.

Expedia's data shows Friday departures now average about 7 percent cheaper than Sunday departures.1 The reason: business travelers used to fly Friday afternoons home. They don't anymore. Most fly Tuesday through Thursday now. The drop in Friday business demand creates leisure-fare opportunities.

Wednesday and Saturday departures are still cheap. Sunday and Monday departures are the most expensive. The single most expensive flying day in 2026 has consistently been Sunday.

Where to book

For most domestic flights, book direct on the airline's website. The price is usually identical to what you'd see on Expedia or Kayak, and you'll have less hassle if something goes wrong.

For international flights, comparison sites genuinely help. Google Flights is the best at showing flexible-date pricing and route alternatives. Skyscanner sometimes finds budget carriers the others miss.

Avoid Hopper for direct booking. The app is great for price tracking and alerts. It's not always great as the booking platform itself, since refunds and changes go through them instead of the airline.

Three small habits that save real money

First. Set Google Flights alerts for any trip more than three months out. You'll get an email when the price drops more than 10 percent. Free, automatic, and you stop refreshing search pages.

Second. Always price out the flight from a nearby airport. Flying out of Fort Lauderdale instead of Miami, Long Beach instead of LAX, or Providence instead of Boston can cut 20 percent off the fare.

Expedia data ranks Fort Lauderdale, Las Vegas, and Orlando as the cheapest U.S. departure airports, with average fares about 25 percent below the national average.3

Third. Use a credit card that earns flexible travel points. Chase Sapphire Preferred, Amex Gold, or Capital One Venture all work. The cash value of the points usually beats airline-specific cards because you can transfer to multiple programs.

What to do next

If you have a 2026 trip in mind, do this. Plug your dates into Google Flights this week to see current pricing. Then set a price alert. Check back in 30 days. If prices have dropped or are stable, book. If they've gone up, book now and stop watching.

And if your dates are flexible, use the calendar view in Google Flights. Move your trip a few days each way to find the dip. The difference between a Saturday departure and a Friday departure can be $200.

Sources

1. Expedia, 2026 Air Hacks Report, February 2026. expedia.com/newsroom/expedia-2026-air-hacks

2. The Points Guy, Best Time to Book Flights for Cheap Airfare in 2026, May 2026. thepointsguy.com/airline/best-time-to-book-a-flight

3. Travel Noire, The 2026 Summer Airfare Window You Should Wait For, April 2026. travelnoire.com

4. Hopper, 2026 Annual Air Travel Report. hopper.com/research