With most major airlines, you can book the air tickets up to 11 months in advance, meaning 330 to 331 days before your departure. Whereas budget airline booking windows vary more widely — anywhere from 2 to 11 months before departure, depending on the carrier. Booking in advance is one of the smartest moves, mostly taken by the smart traveler, because it allows them to maximize their savings. By doing so, you cannot only effectively secure budget travel but also be able to lock in your preferred seat on the flight.
Before you completely rely on the suggested hours for booking an air ticket, we need to make one thing crystal clear is that it does not apply exactly the same to both international and domestic flights per airline.
If you really want to know the best time to book air tickets with different airlines, we highly recommend not going anywhere and starting to scroll to learn more about it.
Quick Answer: How Far Ahead Can You Book a Flight?
If you do not know the booking availability is the major concern behind your curiosity, “when can I book,” as per our assumption. Reading the overview, you must have got a clue on when flight bookings become available. If you remember, we also mentioned that the same booking window does not equally apply to all airlines; it varies from one airlines to another. Only by knowing the booking window for each airline appropriately, you can plan your trip better and book your flight as soon as tickets go on sale.
To show support for your concern, we have figured out the time when you can expect the respective airlines booking window to become accessible in the table below.
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Airline
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Booking Window Opens
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Delta Air Lines
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330–331 days (11 months) in advance
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United Airlines
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330–331 days (11 months) in advance
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American Airlines
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331 days (11 months) in advance
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Alaska Airlines
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330–331 days in advance
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JetBlue
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331 days in advance, adjusted daily
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Hawaiian Airlines
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330 days in advance
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Southwest Airlines
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8–9 months (schedule released in monthly batches, not a fixed date)
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Spirit Airlines
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10–11 months in advance
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Frontier Airlines
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258 days (about 8.5 months), extended in 2-month increments
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Allegiant Air
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6–9 months in advance
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Sun Country Airlines
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2–3 months in advance (minimum)
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Iberia
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Up to 365 days (12 months) in advance
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Jet2
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12–18 months in advance on select routes
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Qatar Airways
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330–360 days (11–12 months) in advance
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Most other major international carriers
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330–361 days (11–12 months) in advance
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Flight Booking Windows by Airline
Remember, you cannot mix up one airline’s booking window with another because each has its own rules regarding its window accessibility for booking air tickets. Here's how each airline's booking window breaks down:
Domestic US Airlines
Three of the biggest airlines that have been long known for their legacy in the United States aviation industry for over decades are Delta Airlines, United Airlines, and American Airlines. All three of them involve almost the same pattern, and update their flight booking windows every day, permitting passengers to book flights either 330 days before or 331 days in advance of the departure.
There is no particular day we have figured out yet when all upcoming flights across these biggest legacy-based airlines become accessible at a time. On the contrary, they usually add one new travel date daily to ensure consistent travel service to their valuable customers who prefer early flight bookings.
Unlike other airlines that open a booking window by updating travel dates every day, Southwest Airlines does not shift its booking window forward. Instead, they allow passengers to book their flight for multiple travel dates at the same time. You can discover their most updated travel date after every few weeks. So, it clearly suggests that you can book Southwest flights usually 8-9 months (260 days) earlier than your expected date to fly. But don’t mistake the booking date for fixed, because it can shift forward or backward with each updated schedule release.
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Airline
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Booking Window Opens
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Delta Air Lines
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330–331 days in advance
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United Airlines
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330–331 days in advance
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American Airlines
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331 days in advance
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Southwest Airlines
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8–9 months (schedule released in batches)
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Alaska Airlines
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330–331 days in advance
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JetBlue
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331 days in advance
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Hawaiian Airlines
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330 days in advance
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International Airlines: Flight Booking Windows
More than half of International and full-service airlines allow travelers worldwide to book tickets 11-12 months before the intended travel date. Meanwhile, tickets for some airlines, including Iberia, often start accepting reservation requests 1 year (365 days) before the travel date. Besides this, some airlines like Jet2 usually become accessible for reservations 365 to 548 days (12/18 months) before the flight departure. But remember, this approach does not apply to all routes except a few.
Just like other airlines such as Jet2, all airlines open up their bookings for flights to Europe, Asia and the Middle East. However, it is highly recommended that you get the latest information from the airline regarding the flight, including the aircraft, gate number, or the departure time, as it can be changed a few hours before the travel date.
Flight Booking Window for Budget & Low-Cost Carriers
Budget airlines have different rules for the booking window in comparison to full-service carrier operators. No fixed booking hours are available for all airlines offering the cheapest flights. For instance, Frontier Airlines mostly considers updating its flight schedule within every 60 days, so mark 258 days (around 8½ months) before departure as prime time to check for and reserve available flights.
How Far in Advance Can You Book International Flights?
International/long-haul flights are one of the other key factors based on which the booking window is shaped. To concisely know the time between purchase and departure dedicated to booking the flight ticket for each airlines consider going through the route-specific highlights below.
Standard International Booking Windows
Booking window and best time to buy are the different faces of one coin; booking window defines the airlines availability for reservations, while best to buy reflects your intent of saving dollars on your ticket purchase. So, don’t mistake both for the same intent.
Undoubtedly, early booking is one of the popular strategies to ensure a seamless journey without wallet draining. So, your intent behind seeking an early time to book International airlines is not meaningless.
For your kind information, we would suggest that you can prefer visiting the airlines’ official site or accessing their mobile application 2 to 8 months before the flight.
Airline-Specific Schedules for Long-Haul Routes
The route affects the ability to know the accessibility of the booking window for long-haul flights as do the major factors which shape the window, like the airline and route, for long-haul routes like:
Europe: Usually, international airlines flights become accessible 3-6 months beforehand so it can be considered a smart idea to find the best value.
Besides this, if your plan is to spend your weekend across European cities, ensure to book the flight between June and August, which means 5 or 8 months prior.
Similarly, it is best to consider booking the flights between 2 and 4 months in advance if it's about winter vacation in Europe.
Asia: Flights to this continent are usually longer, which becomes accessible from 3 to 8 months before departure.
If traveling to any of the popular destinations like Japan or South Korea across Asia is on your bucket list, then consider starting to make flight reservations 4-8 months earlier. But if you’re desperate to explore cherry blossom season in Japan, find a 6-10-month booking window; the finest time to book air tickets.
Thailand, Vietnam, or Bali are other famous places to visit across Asia; for which you should book the flights 3 to 6 months before departure. Doing so will help you ensure lower fares efficiently and effortlessly.
Africa: Most airlines operating flights to Africa genuinely start accepting flight reservations 2-8 months prior to the departure date.
You can start booking the flight 4- 10 months earlier than the travel date if it's about exploring a safari trip. The safari season generally begins between June and October, and most people prefer visiting the destination during this season, which is why the tickets become expensive and sell out faster. So, better to book early rather than at the start of the season.
Australia & New Zealand: A 2–8 month window is standard, with longer lead times recommended around June–August and October–March, when demand from both hemispheres overlaps.
How Far in Advance Can You Book Domestic Flights?
As you have already recognized that the timing for booking acceptance varies throughout the above sections, likewise, the booking for domestic flight reservations are accepted with different booking windows.
Many operating airlines across the United States allow you to start making flight reservations for domestic routes roughly around 330-331 days (11 months) in advance of the travel date. But booking the flights earlier does not guarantee that you will get the cheapest air tickets all the time.
Here, our main motive behind suggesting you book early is to protect yourself from paying more for the same airfare during the peak travel season, such as Thanksgiving, Christmas, or spring break.
Why Do Airlines Limit How Far Ahead You Can Book?
Being just a traveler, you may assume the timeframe is chosen randomly by airlines. But that’s an entirely wrong perception. Let us clear up that baseless misconception of yours by giving you the real reason airlines start accepting reservations only within a limited advance-booking timeframe. This same unpredictability is also why travelers should understand their rights around an overbooked flight, since schedules can shift even after booking early.
Consider reviewing the Operational Factors-centric highlights outlined below to satisfy your curiosity with precision.
Schedule Planning & Route Changes
Airlines specify the advance-booking timeframe on the basis of flight demand among the travelers, airport permissions, and business needs. Most airlines believe they may have to face the risk of changes, additions, or cancellations to their flights by passengers before departure if they enable their networks too far in advance.
To keep themselves away from such setbacks at the last minute, they prefer accepting reservations only for the period when they feel confident the flight schedule will remain as usual.
Fleet & Crew Assignment Logistics
Airlines usually avoid finalizing and releasing their aircraft and crew assignments a year in advance. Instead, they prepare and confirm their flight operations only a few months before the travel date. The main reason behind this is that they need enough time to plan aircraft maintenance, confirm pilot and cabin crew availability, and finalize work schedules. Once these operational details are in place, airlines can confidently open reservations for those flights.
This is why most major U.S. airlines open bookings around 330 days out, while many international carriers extend slightly further, closer to 360 days. The crux of the matter is that they obtain enough time to ensure the flight schedule, aircraft, and crew assignments are properly finalized before selling seats to travelers.
Fare Class & Pricing Structure Updates
Airlines do not charge the same all day, all hour for each flight ticket based on travel class and fare type. The price of the airline ticket fluctuates depending on the number of travelers opting for air travel at the same time, the competitors' pricing, and future travel demand. And these factors keep shifting; hence, airlines need an adequate gap between opening bookings and the departure date so they can regularly adjust fares and seat availability in response to the latest market conditions.
Best Time to Book a Flight for the Cheapest Price
The booking window allows you to get insight into and book flights available for the next few days, a few weeks, and a few months in advance. And even make it possible for you to save money on airfare by purchasing the air ticket online within the ideal price window, though it varies depending on the route: domestic and international. Once you've locked in your dates, pair this with our guide on the cheapest day to fly one-way to squeeze out even more savings.
Domestic Flights – Ideal Booking Window
Most U.S.-based domestic flights usually become cheaper between 1 and 3 months in advance of the flight. But if you’re expecting tickets with more price drops, then find a 21- to 30–day booking window, as airlines offer lower fares on certain routes. But don’t make the mistake of thinking this timeframe is only for finding cheap flight tickets. In that case, you can consider booking the deals that airlines usually flash weekly and monthly.
International Flights – Ideal Booking Window
Flight bookings for international trips become accessible 11 months in advance but feel cheaper 2-8 months earlier than the flight departure. But if you are intending to go out of your home country with the intention of exploring some unusual experiences across Europe, Japan, or East Africa, it is better you continue booking the ticket well in advance, before the season starts. But if you’re a loyalty program member across any major airlines and have valid reward miles, then you’re in luck, as it allows you to ensure cashless booking no matter whether you book 11 months or a few weeks before the flights. If you're planning ahead for a long-haul trip, it's also worth checking round-trip flights under $200 to see if your route qualifies for a deal.
Booking Too Early vs. Booking Too Late: Quick Comparison
Being a traveler, you must want, and it's even your right to know the meaningful reason behind whether you should book your flight early. Why is it recommended? And why should you avoid booking at the last minute?
Refer to the comparison created between early booking and last-minute booking in table form.
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Booking Early (as soon as the window opens)
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Booking Late (within days/weeks of departure)
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Price
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Fares start near their baseline "asking price" — rarely the cheapest, though seats are guaranteed
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Prices usually spike in the final three weeks; last-minute deals are the exception, not the rule
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Seat selection
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Best choice of seats, cabins, and preferred flight times
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Limited seat map, especially for popular routes
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Flexibility
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More time to catch a fare drop or use the 24-hour cancellation rule
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Little to no room to shop around if plans change
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Schedule stability
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Departure times, aircraft, or connections may still change before your flight. If your schedule does shift, know your rights around a flight delay or flight cancellation.
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Schedule is essentially locked in by this point
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Best for
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Peak-season travel, specific seat requirements, using points/miles at schedule release
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Truly flexible travelers, or opportunistic last-minute deal seekers
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Bottom Line
Since booking in advance is one of the most popular ways to save money on airfare, you may be wondering: How far in advance can you book a flight? Or, when do airlines usually start accepting flight reservations? The short answer: most airlines open bookings 6 to 12 months before departure — usually around 330 to 331 days out for major U.S. carriers, and up to a year for many international airlines. Check your specific airline's platform for the exact date their schedule opens. Once you've booked, the next step is learning how to check in online for your flight to save time on travel day.
Frequently Asked Questions ?
How far in advance can you book a flight on Delta/United/American?
Since the travel dates on Delta/United/American are usually updated every day, you can start booking the flight across these airlines up to 330 days before departure.
Can you book a flight a year in advance?
No — not typically. Major U.S. airlines like Delta, United, and American open bookings around 330 to 331 days (about 11 months) before departure. Some international carriers go slightly further, up to 360–365 days.
What is the maximum booking window for international flights?
Whether your concern is about securing budget travel or accessing the wider seat options to choose from, airlines become accessible 11 to 12 months ahead of the departure date. Means you can book 330 to 365 days before.
Is it better to book flights early or wait for a sale?
It's completely up to you; if you just want to maximize your savings or want to explore more than just pricing deals, then consider waiting for the sale. Otherwise, go ahead with an early booking strategy and save your money.
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