Fareward

Guide · checked 2026-10-11

Best Time to Buy Plane Tickets in 2026 (and What to Do After You Book)

Quick answer

For US domestic trips, Google says average fares have been lowest about 39 days before departure, with a typical low-price window of 22 to 57 days out. For international trips, the lowest average has come about 89 days out, inside a broad 50 to 133 day range, and Google says the dip inside that range is small, so it advises booking international trips as soon as you can.

That's the best general answer anyone can give, and it's an average. Your route, your dates, and the airline's inventory decide what you actually pay. And the price you pay at checkout isn't necessarily the last price you'll see: fares keep moving after you book.

The booking windows, by trip type

Google's 2026 analysis uses five years of aggregated Google Flights data for US departures.

Trip type Lowest average price Typical low-price range
US domestic ~39 days before departure 22–57 days
International ~89 days before departure 50–133 days (small difference inside the range)

A year earlier, Google's 2024 analysis put the domestic low at 38 days and the range at 21–52 days, so the sweet spot has been fairly stable.

Holiday travel runs earlier. Google published separate Thanksgiving and Christmas guidance in the same 2026 post; if you're booking a holiday trip, check that post directly, because the holiday sweet spots sit further out than a normal domestic trip.

How much more you pay outside the window

CheapAir's 2024 airfare study looked at about 917 million domestic US fares and measured how much more travelers paid in each booking window compared with the cheapest one.

When you book Days before departure Price vs. the cheapest window
~7–10 months out 315–206 +36%
~2.5–7 months out (includes 3 and 6 months) 205–75 +14%
~3 weeks to 2.5 months out 74–21 Cheapest (baseline)
2–3 weeks out 20–14 +8%
1–2 weeks out 13–7 +26%
Final week 6–0 +59%

Two takeaways: booking very early is not the safe bet many people think it is, and the last three weeks are where prices climb fastest. CheapAir's numbers line up with Google's: both put the cheapest domestic fares roughly one to two and a half months before departure.

Why "the best time" is only half the answer

Booking-window data describes averages across millions of searches. It can't tell you what one specific flight will do next week. Airlines reprice seats constantly as demand shifts, sales start and end, and fare buckets open or close. That cuts both ways:

  • Book too late and you often pay more, because the cheapest fare buckets can sell out close to departure.
  • Book in the sweet spot and the fare can still drop afterward, because a sale or a soft-demand week can push the price below what you paid.

Most booking advice stops at checkout. The money people leave on the table is often after checkout, when the fare on the exact flight they already bought goes down and nobody notices.

What actually moves the price more than timing

If you're trying to spend less, these levers matter more than which day you click "buy":

  1. Which days you fly. Google's data shows departing Monday and returning Tuesday or Wednesday saves about 14% versus weekend trips, and up to 20% on domestic trips versus departing and returning on Sunday.
  2. Nonstop vs. connecting. Google found nonstop tickets cost about 20% more on average than connecting itineraries.
  3. Which day you book barely matters. Google's latest analysis found the cheapest booking day saves only about 1.4% compared with the most expensive. See our cheapest day to book a flight guide for the full picture.
  4. Flexible airports. Nearby airports can price very differently on the same dates. Google Flights shows this in its Airports view.

A simple plan for booking at the right time

  1. Start watching early. Two to three months ahead for domestic and longer for international, set a price alert on your route (Google Flights and others offer this).
  2. Book once you're inside the window and the price looks normal or low. Google Flights labels prices as low, typical or high for many routes.
  3. Don't wait for a magic weekday. If the fare is good on a Sunday, the data says waiting for Wednesday saves you roughly a rounding error.
  4. Book directly with the airline when you can. Changes, credits and repricing are simpler on an airline-direct ticket than through a third party.
  5. Use the 24-hour window. Most US airlines let you cancel within 24 hours of booking for a full refund on qualifying bookings, so check your airline's specific rule.
  6. Keep watching after you book. On many airline-direct fares, the major US airlines let you change to the same flight at a lower price and keep the difference as credit. Our airline price drop guide explains the rules airline by airline.

Booking timing by airline policy

Once you've booked, what happens after a drop depends on the airline and the fare:

  • Southwest has no change fees, and the difference on Choice fares comes back as a flight credit. Basic fares can't simply be repriced. See Southwest price drop after booking.
  • Delta issues an eCredit for the difference when you change to a lower fare on Main Classic and higher fares; Delta Main Basic generally can't be changed. See Delta price drop after booking.
  • United, American and Alaska each have their own rules for standard vs. basic economy. Check the guides linked below.

Basic economy is the common trap on every major US airline: it's cheap because it gives up flexibility, and that usually includes repricing.

Already booked? Let Fareward keep watching

Forward your airline confirmation to [email protected]. Fareward watches the fare on your exact flights and fare type. If it drops and your fare rules allow it, Fareward files with the airline as your agent, without needing your airline password, and the savings land as airline credit in your name. It covers United, Delta, American, Alaska, Southwest and Hawaiian.

Watching is free. Fareward takes 20% of the savings, only after a credit lands. If the fare never drops, or your fare can't be repriced, you pay nothing. Because the savings usually come back as airline credit rather than cash, it works best for people who'll fly that airline again.

FAQ

When is the best time to buy plane tickets for a domestic flight? Google's 2026 analysis of five years of Google Flights data found US domestic fares were lowest on average about 39 days before departure, with a typical low range of 22 to 57 days.

When should I book an international flight? Google found international fares were lowest about 89 days out, within a 50 to 133 day range, and noted the difference inside that range is small, so it recommends booking as soon as you can.

How much more do flights cost if I book 3 or 6 months ahead? CheapAir's 2024 study of about 917 million domestic US fares found that booking roughly 2.5 to 7 months out cost about 14% more than the cheapest window (about 3 weeks to 2.5 months out). Booking 7 to 10 months out cost about 36% more, and booking in the final week cost about 59% more.

Is there a best day of the week to buy plane tickets? Not really. Google found the cheapest booking day saved only about 1.4% versus the most expensive day. Which days you fly matters much more.

Can a flight get cheaper after I buy it? Yes. Fares change after purchase. On many airline-direct fares, US airlines let you change to the same flight at the lower price and keep the difference as credit. Basic economy fares usually can't be repriced.

Should I wait for prices to drop before booking? If you're inside the booking window and the price looks typical or low, booking is usually the safer move. You can keep watching the fare after you book.

What does Fareward do? Fareward watches a fare you've already booked. If it drops and your fare rules allow it, Fareward files with the airline for credit. Watching is free and Fareward takes 20% of savings only when a credit lands.

Related guides

Sources (checked October 11, 2026)