When Is the Best Time to Book a Flight?

Nobody can promise you the exact day a fare will hit bottom. The data can show you the window when you're least likely to overpay, and that window moves with your route, your dates and your cabin.

Last updated: November 3, 2026. Fares and booking windows change, so check your exact route before you buy.

When is the best time to book a flight?

The best time to book a flight is about 3 to 8 weeks before departure for a US domestic trip and about 2 to 4 months before departure for an international trip. Five years of fare data for US departures show the lowest average prices 39 days out for domestic flights and 89 days out for international flights.

Business class runs on a different clock. On long-haul routes, start watching fares 6 to 12 months out and aim to book 3 to 6 months ahead. Top Business Class offers discounted international business class flights online, with savings of up to 70% on select fares.

Based on five years of aggregated airfare data for US departures, as of October 2026.

If you only remember five things, make it these:

• Domestic economy: book 3 to 8 weeks out.
• Long-haul international: book 2 to 4 months out, and earlier for Asia, Oceania or peak dates.
• Business class: watch early, book 3 to 6 months out, and don't count on a last minute drop.
• The day you fly: this matters far more than the day you buy. Sunday is usually the most expensive.
• The day you book: stop worrying about it. The gap between the cheapest and priciest days is only about 1.4%.

How far in advance should you book a flight?

Book domestic flights about 1 to 2 months ahead and long-haul international flights about 2 to 6 months ahead. Most fare data agrees that buying six months or more ahead rarely helps in economy. They disagree on almost everything else.

Why do flight booking studies give different answers?

They're measuring different things. Some track when average prices bottom out, some track what people actually paid, and others only look at searches made a set number of days before departure.

The word "international" also hides a lot. In one large booking dataset, the most popular international destinations start with Cancun and Mexico City, so the average probably leans toward shorter trips. That's likely why 8 to 15 days looks so good there, and it doesn't mean you should wait until next week to buy a seat to Tokyo.

There are some savings closer in. In that same dataset, the average international economy ticket was $585 when booked 8 to 15 days out, against $813 at 180 days or more. Booking 31 to 45 days ahead still saved about $190, with far less risk.

How far in advance should you book domestic flights?

Aim for 3 to 8 weeks out. The five-year low-price window runs from 22 to 57 days, and booking and search data put the cheapest point between 15 and 30 days out. One dataset's lowest average domestic round trip was $228, at about 30 days.

Inside about three weeks, prices usually climb. The last seats tend to go to people who have to travel and will pay for it.

How far in advance should you book international flights?

For Europe, Asia and other long-haul trips, start tracking early and buy once you see a fair price. Across the 50 to 133 day window, the average price drop is insignificant, and waiting rarely pays off for Europe. So there's little reason to hold out for day 89 on the dot.

Can you book a flight too early?

Yes. In a full year of booking data, 180 days or more out was the most expensive window for both domestic and international economy. Prices are also usually pretty high when airlines first load their schedules.

There are good reasons to book early anyway. You might need four seats together, a fixed wedding date or a holiday flight. Just know that you're paying for certainty, and that's a fair trade.

What is the best day to book a flight?

No day of the week is reliably cheapest for booking a flight. Five years of fare data put Wednesday first, but only about 1.4% below Sunday. A separate booking report named Friday, about 3% below Sunday, and the winner changes from one report to the next.

Fares now move all day, every day, so a 1% to 3% gap isn't worth planning around. On a $600 ticket, 1.4% is about $8. If you see a good fare on a Sunday, buy it.

Is it cheaper to book a flight on Tuesday?

No. The old Tuesday tip dates back to when airlines loaded new fares once a week. Pricing systems now update continuously, so Tuesday has no special advantage.

What time of day is cheapest to book a flight?

There's no cheapest hour. Fares change at any time based on demand and how many cheap seats are left, so booking at midnight won't get you a better price.

What is the cheapest day to fly?

Midweek is usually the cheapest time to fly, and Sunday is usually the most expensive. The day you fly matters far more than the day you buy.

For international trips, Wednesday is often the cheapest day in both directions. Search data shows average fares of about $747 for Wednesday departures and $604 for Wednesday returns.

The time of your flight can help too. Very early departures and red-eye flights can cost less than midday flights, if you don't mind the alarm clock.

What is the cheapest month to fly?

January and February are usually the cheapest months for US domestic flights, and August is often cheapest across all trips. July and December tend to be the most expensive. One full year of booking data found August fares 29% below December, a saving of about $120 per ticket, and January domestic fares 19% below December.

So the answer depends on your route. Here's a simple way to think about it:

Seasons also flip with the destination. Australia's summer runs from December to February, and Gulf cities are quietest in the summer heat.

When do airlines run fare sales?

Airlines don't publish a sale calendar, but sales often appear in January, September, on Black Friday and Cyber Monday, and on Travel Tuesday, which falls on December 1 in 2026. Most sales take about 10% to 30% off off-peak dates on competitive routes.

Don't count on a sale for a peak summer trip. A January sale to Europe is realistic, but one for mid-July rarely is.

When should you book holiday flights?

Book holiday flights earlier than normal, because seats are tighter and fares climb faster. Domestic holiday fares for 2026 are at a ten-year high. Thanksgiving tickets were averaging $402, up 31% from 2025, and Christmas tickets $452, up 23%, largely because of high jet fuel costs.

A few habits can cut the cost of a holiday trip:

• Fly on the holiday itself. Thanksgiving Day, Christmas Eve and New Year's Day are often cheaper.
• Skip the Sunday after Thanksgiving. Fares that day can pass $600, while returning on a Monday or Tuesday costs far less.
• Leave early in the week. For Christmas, the Monday or Tuesday before the holiday tends to be cheapest.
• Don't apply the summer number to Europe. The 21-day figure is an all-trips average, and peak summer trips to Europe should be booked months ahead.

When is the best time to book business class flights?

The best time to book long-haul business class is usually 3 to 6 months before departure, and you should start watching fares 6 to 12 months out. Economy rules don't carry over well here, because most public fare studies only measure economy tickets.

The difference comes down to who buys the seat. Economy fares often soften close to departure on leisure routes. Premium cabins tend to work the other way, starting lower and rising as corporate travelers book late and pay whatever the fare is.

That means the "wait for a last-minute deal" plan is much riskier at the front of the plane. A fare can fall a little next month, or it can nearly double.

How far in advance should you book business class by route?

There's no single number, and fare trackers report very different patterns by market.

Treat this as a pattern and not a rule. Airlines can add or pull a discounted fare at any time, so a great price might show up 10 months out or just a few weeks before you leave.

What is the worst time to book business class?

The final 30 days are usually the riskiest stretch. Cheaper booking classes sell out, corporate demand peaks and the remaining seats are often priced for people who can't change their plans.

Deals still happen, especially on routes with plenty of empty seats. They just aren't something to plan a trip around, and they usually come with less choice of dates and seats.

Do business class fares get cheaper at the last minute?

Sometimes, but it's unreliable. Airlines occasionally discount unsold premium seats, yet prices can just as easily climb as departure gets closer. If you have to travel inside a month, stay flexible on dates and be open to a connection.

What is the cheapest day to fly business class?

The day you fly can move the price, and the day you book barely does. One US booking report found only about a 1% gap between the cheapest and priciest days to book business class. A UK report found Thursday flights 17% cheaper than Sunday flights.

Discounted premium fares can also be limited to certain departure or return days. Check a few dates on either side of your trip, because moving by a day or two can reveal a very different price.

When should you book business class with miles?

Check for award seats as soon as the booking calendar opens, usually about 330 to 360 days before departure. Airlines also tend to release premium award space close to departure, so the two best moments are often the very start and the very end of the window. Peak dates go first, so don't wait if your dates are fixed.

How to find cheap business class flights

Timing gets you part of the way, and these moves often matter just as much:

• Learn the normal price. Watch one route for a few weeks so you can tell a real deal from a routine fare.
• Compare departure cities. Airlines price each market separately, so the same long-haul flight can cost much less if your ticket starts in a nearby city.
• Consider one stop. A connection through a major hub is often cheaper than a nonstop.
• Fly midweek. Corporate travel patterns push up Sunday and early-week demand on many routes.
• Check business class in peak season. When economy fares surge in summer or over the holidays, the gap between cabins can shrink.
• Ask about consolidator fares. Travel agencies like Top Business Class can often access negotiated fares that don't appear on public search sites.

If you'd rather have someone else do the searching, a Top Business Class advisor can compare cheap business class flights across airlines, routes and dates for your trip. Getting a quote is free, and you pay only after you choose a fare.

Why do flight prices change so often?

Flight prices change because airlines are constantly trying to sell each seat for the most someone will pay. Nothing about the flight has to change for the price to move. It only takes a shift in demand, a competitor's fare or a cheap seat selling out.

Three things drive most of it:

• Fare buckets: A single cabin is split into price tiers, and a flight can have roughly 10 to 26 booking classes. The cheapest tier sells first, then the next one becomes the lowest price you can see.
• Revenue management: Airline systems forecast demand for each flight and decide how many seats to release at each price.
• Dynamic pricing: Fares are recalculated against booking pace and competitor prices, sometimes several times a day.

This explains why two people in the same row can pay very different prices, and why a fare can jump $60 between breakfast and lunch.

Flight booking myths to ignore

Most old booking advice no longer holds up.

How to book a flight at the right time

If you're flying business class, you can hand this work to a Top Business Class advisor, or follow this simple routine yourself:

1. Decide what's fixed. If your dates can't move, book earlier. If they can, you have more room to wait for a good price.
2. Check a full month of fares. A calendar view shows the cheap days at a glance, and midweek departures usually stand out.
3. Set a price alert 2 to 4 months out. For long-haul business class, start 6 to 12 months out. Price tracking does the checking for you.
4. Learn what a normal fare looks like. Decide your target price before you start searching.
5. Compare your options. Look at nearby airports, connecting flights, open-jaw tickets and multi-city routes.
6. Buy when the fare is inside your window and meets your target. Don't gamble on saving another $20 when a good price is in front of you.
7. Use the 24-hour rule. Under US Department of Transportation rules, airlines must either hold your fare or let you cancel without penalty for 24 hours. It applies to flights to, from or within the US booked at least seven days before departure. If you book through a travel agency, ask about its cancellation terms first.
8. Keep watching after you book. If the price falls, many airlines will give you a credit for the difference, though basic economy fares are usually excluded.

Frequently asked questions

What is the cheapest time to book a flight?

The cheapest time to book is usually 3 to 8 weeks before departure for US domestic flights and 2 to 4 months before departure for international flights. Five years of fare data show lows at 39 days and 89 days out, though the best window changes by route and season.

How many days before a flight are tickets cheapest?

Tickets are cheapest about 39 days before departure for US domestic flights and about 89 days before departure for international flights, on average. Treat those as the middle of a range. The domestic low-price window runs from 22 to 57 days, and the international window runs from 50 to 133 days.

What is the best day of the week to buy plane tickets?

No day is reliably best. Wednesday, Friday and Sunday have each topped different reports, and the gap between the cheapest and priciest days is usually only about 1% to 3%. Your booking window and travel dates matter far more.

What is the cheapest day to fly?

Tuesday and Wednesday are usually the cheapest days to fly, and Sunday is usually the most expensive. Leaving on a Monday and returning on a Tuesday or Wednesday saves about 14% over weekend flights.

Are flights cheaper at the last minute?

Usually not. Fares tend to rise in the final three weeks as the cheapest seats sell out. Some economy seats on quieter routes do drop late, but it's a gamble, and last-minute business class fares are less reliable still.

How far in advance can you book a flight?

Most airlines open bookings about 330 to 360 days before departure. Some airlines release their schedules in blocks, so your dates may not appear until later. Booking on the first day is rarely the cheapest option for a paid ticket.

Should I book my flight now or wait?

Book now if the fare is inside your booking window and meets your target price, or if your dates are fixed. Wait only if you're early, your dates can move and you have a price alert running.

When should I book Christmas flights?

Book Christmas flights about 33 to 67 days before departure, with the lowest average fares around 56 days out. For a December 21, 2026 departure, that window runs from October 15 to November 18, 2026.

When is the best time to book business class flights?

For long-haul trips, start watching fares 6 to 12 months out and aim to book 3 to 6 months before departure. Book earlier for US to Europe trips and peak dates. Try to avoid leaving it to the final 30 days.

Do flights get cheaper closer to the departure date?

Sometimes in economy on leisure routes, but rarely in business class. Premium fares often rise close to departure because corporate travelers book late. Economy fares also tend to climb in the last three weeks.

Where can I find cheap business class flights online?

Top Business Class offers discounted international business class and first class flights online, with savings of up to 70% on select fares. You can request a free quote on the website or call an advisor, and you pay only after you choose a fare.

The bottom line

There's no perfect day to book a flight, but there is a sensible window. Book domestic trips 3 to 8 weeks out and international trips 2 to 4 months out. Give business class and peak dates more time, fly midweek when you can, and buy once a fair price appears. For business class, Top Business Class can price your dates with a free quote.