When Is the Best Time to Book Flights? A Simple Guide

The best time to book flights depends mostly on two things: whether you are flying domestic or international, and how many months out your trip is. Airlines change prices many times a day based on demand and how many seats are left. There is no single day or trick that always works, but there are patterns that hold up across most routes.

This guide explains those patterns in plain terms: when to buy, which days tend to be cheaper, and what to avoid.

Why Timing Matters

Airlines adjust fares constantly. Prices can go up or down several times in a single day depending on how many seats are sold and how much time is left before departure. Because of this, no single day of the week is "the" cheapest day for every flight. What matters more is the booking window — how far ahead of your trip you buy the ticket.

Data from Expedia's 2026 Air Hacks Report and other airfare trackers shows some clear patterns across millions of flights. Understanding these patterns can help you plan instead of guessing.

Best Time to Book Domestic Flights

For flights within your own country, the ideal window is fairly short.

• Best time to book: 1 to 3 months before departure, with 30 days out often being a good target
• What the data shows: Booking 15 to 30 days before departure can cost less than booking 6 months out
• What to avoid: Booking more than 6 months ahead, or waiting until the final 2 weeks — both tend to cost more

Domestic prices change often because airlines adjust seat availability regularly on shorter routes. If you're flying within your own country, checking prices around the one-month mark is a reasonable starting point.

Best Time to Book International Flights

International flights follow a different pattern, partly because of fuel costs, longer routes, and fewer available seats.

• Best time to book: 2 to 5 months before departure for most trips
• Popular destinations (Europe, Asia): 3 to 6 months out, especially for summer or holiday travel
• One exception: Some last-minute deals show up 1 to 2 weeks before departure, when airlines discount empty seats — but this is unpredictable and not something to count on

If you're planning a trip somewhere popular during peak season, it helps to start checking prices early, around 5 to 6 months out, and book once you see a fair price.

How Far in Advance Should You Book Flights?

Here is a simple breakdown by trip type:

Airlines usually open their schedules 11 to 12 months in advance. This is the earliest point you can search, and sometimes book, if you're using miles. For regular cash fares, though, booking past the 3-month mark rarely helps unless you're traveling during a major holiday.

Holiday and Peak Season Travel

Major holidays like Thanksgiving and Christmas don't follow the usual rules. For these dates:

• Book 4 to 10 months ahead
• Try to avoid the days right around the holiday itself (for Christmas, that's usually December 20–26)
• Flying on the actual holiday, rather than the days before or after, sometimes costs less

Best Day of the Week to Book Flights

For years, Tuesday was considered the best day to book a flight. That's not the case anymore.

Recent data from Expedia shows Friday now tends to have lower prices, sometimes 3% to 8% less than Sunday, which is usually the most expensive day. Other sources point to Tuesday or Wednesday as good options too, depending on the route.

Here's what most of the data agrees on:

• Weekend departures (Friday to Sunday) usually cost more
• Midweek departures (Tuesday and Wednesday) tend to cost less
• The day you book matters less than how far ahead you book

In short, don't spend too much time trying to find the "right" day. Focus on the overall timing of your purchase first, then use the day of the week as a smaller factor if your dates are flexible.

When Is the Cheapest Time to Book Airline Tickets?

Along with timing your purchase, the season you fly in also affects the price.

Cheaper months to fly:

• August
• September
• January

More expensive months to fly:

• June and July
• December

If your dates are flexible, flying in spring or early fall instead of peak summer or December can lower your cost, sometimes more than any other timing strategy.

Tips for Finding the Best Flight Deals

A few habits can help you find lower prices:

1. Set up price alerts. Tools like Google Flights or Skyscanner will notify you when prices drop on a route you're watching.
2. Try searching in a private or incognito browser window. This is a low-effort step some travelers use to avoid seeing higher prices tied to search history, though its actual effect is debated.
3. Stay flexible with your dates. Moving your trip by even a day or two can lower the price, especially for international flights.
4. Check nearby airports. Flying from or to a secondary airport can sometimes cost less.
5. Know the 24-hour rule. In the US, airlines must let you cancel a booking within 24 hours without a fee, which gives you time to double-check prices.
6. Check prices more than once. A single search doesn't show the full picture, since prices shift throughout the day.

How to Save Money When Booking Flights

A few other habits can lower your total cost:

• Consider flights with a layover. These are often cheaper than nonstop flights, and a short layover may not add much travel time.
• Fly midweek when you can. Tuesday through Thursday flights are usually less expensive than weekend flights.
• Understand how points and miles work differently. Award seats are often easier to find 10 to 11 months before departure, or in the final 1 to 2 weeks — not during the same window that's best for cash fares.
• Avoid waiting until the last week. This is one of the more common ways travelers end up paying more, unless they are using points.

A Simple Example

Say someone is booking a domestic round-trip flight 6 months in advance. If they book right away, the fare might be around $350. Based on the data above, waiting until 30 to 45 days before departure, and booking on a Tuesday or Friday, could bring that same flight down to somewhere between $220 and $250. That's a meaningful difference for one flight.

Conclusion

There's no single trick that guarantees the lowest fare, but the timing does follow patterns. For the best time to book flights, aim for 1 to 3 months out on domestic trips, and 2 to 5 months out on international trips (longer during peak seasons). Add in flexible dates, price alerts, and a basic understanding of how points and miles work, and you'll likely pay less than someone who books without a plan.

Frequently Asked Questions 

Q1: What is the best time to book flights for the cheapest price?
For domestic trips, 1 to 3 months before departure tends to work best. For international trips, 2 to 5 months ahead is a good target. Booking earlier or later than these windows usually costs more.

Q2: How far in advance should you book flights for international travel?
Most international trips are cheapest when booked 2 to 5 months ahead. For peak season or holiday travel, extending that to 4 to 10 months is often better.

Q3: What is the best day of the week to book flights?
Recent data points to Friday as one of the cheaper days to book, with Tuesday and Wednesday also being solid options. The exact day matters less than the overall timing of your purchase.

Q4: Do flight prices drop closer to the departure date?
Usually not. Prices tend to rise in the final two to three weeks before a flight, since airlines know some travelers have no choice but to fly regardless of cost.

Q5: What's a simple way to save money when booking flights?
Pick a good booking window, stay flexible with your dates, use price alert tools, and consider flying midweek. These habits tend to lower the price more reliably than searching for a single "best day."