The Best Time To Book a Flight (And Why Most People Get It Wrong)

Key takeaways

• The Goldilocks Window is your best friend. Book domestic flights 1–3 months out and international flights 2–8 months out. That's the sweet spot where prices are lowest and seats are still available. For peak travel periods, add 1–3 months to either range.
• January and February are the cheapest months to fly. Post-holiday demand drops sharply, and airlines lower fares to fill planes. September and October are strong runners-up for deals.
• July and December are the most expensive months. Summer vacation and holiday travel push fares to their yearly highs. If you have to fly during these periods, book earlier than usual.
• Shoulder season is worth considering. April–May and September–October in Europe, for example, offer pleasant weather, fewer crowds, and fares that can run 20–40% cheaper than peak season.
• The cheapest day to fly is not the same as the cheapest day to book. Tuesday, Wednesday, and Saturday departures tend to be cheaper. But there's no magic day of the week that makes booking cheaper. Airline pricing updates continuously.
• Last-minute deals are mostly a myth. Prices typically rise in the three weeks before departure, not fall. We call this the Bargain Bin Trap. Don't wait for a hypothetical deal when a good fare is right in front of you and ready to be booked.
• Set alerts and let the tools do the work. Going monitors thousands of routes around the clock and notifies you when fares drop to prices worth booking. You don't need to check constantly. We will, and we’ll make sure you know exactly when to book. 
• Booking myths still spread. "Tuesday is cheapest to book," "August 23rd is National Cheap Flight Day," "use incognito mode." None of these hold up. Focus on booking windows and price alerts instead.

When are flights cheapest? (By trip type)

Not all flights follow the same pricing patterns. The cheapest booking window depends on where you're going, when you're traveling, and how flexible you can be. Here's a quick breakdown before we dive into the details.

Sweet spot: The Goldilocks Window explained

The Goldilocks Window is the timeframe that's "just right" for booking: not too early when airlines charge premium prices for planning convenience, and not too late when availability is limited and prices spike. 

For domestic US flights, the Goldilocks Window is typically 1–3 months before departure. For international flights, it's usually 2–8 months ahead, varying significantly by destination and season. These windows represent the statistical sweet spot where prices are typically lowest and seat availability is still reasonable.

When to book earlier than the Goldilocks Window

Book earlier for high-demand travel periods like Christmas, Thanksgiving, summer vacation weeks, or major events like the Olympics or World Cup. These periods see both higher prices and limited availability, making earlier booking essential for reasonable fares and preferred flight times.

International travel to popular destinations during peak season often requires booking 4–10 months ahead, while domestic travel requires about 3–5 months. Routes with limited airline competition also benefit from earlier booking since you have fewer alternatives if prices rise or seats sell out.

If you have absolutely no flexibility in dates, destinations, or flight times, book when you know your plans (while minding the Goldilocks Window) to ensure availability.

Last-minute booking reality check (Bargain Bin Trap)

The era of amazing last-minute flight deals is largely over. Last-minute deals are now rarer than in the past, as airlines know they can hike prices for business and first-class tickets. 

Airlines sometimes offer last-minute deals to fill unsold seats, especially for midweek departures or less-popular routes, but these deals are rare and relying on them can be risky. Prices typically rise significantly three weeks before departure, making early booking more favorable.

This is a classic example of the Bargain Bin Trap, assuming prices will fall as departure nears. In reality, airlines frequently raise fares closer to takeoff, so it’s usually smarter to book once you see a good price within the Goldilocks Window rather than wait for a last‑minute deal that might never come.

When is the cheapest time of year to fly?

Timing your trip around the calendar can make a big difference in how much you pay. Airfare follows demand, and demand (largely) follows seasonality. Here's what you need to know.

The cheapest months to fly

If you're hunting for the lowest fares of the year, January and February are your best friends. The post-holiday travel slump hits hard in these months. People have just blown their budgets on Christmas and New Year, and airlines drop prices to fill planes.

For international travel, the same logic applies: Late January through February tend to offer some of the year's lowest fares to Europe, Asia, and Latin America. September and October are also strong months for deals, sitting squarely in the shoulder season after the summer rush cools down.

For domestic US travel, you'll typically find the lowest fares in:

• January (post-holiday slowdown)
• February (low-demand month overall)
• August (mid to end of the month, after the peak summer rush tapers)
• September and October (kids are back in school, leisure travel drops)

That said, great deals can (and do) pop up in any month. Airline pricing is dynamic enough that a mistake fare to Tokyo can happen in November, or a flash sale to Europe can show up in June. The calendar gives you a framework, but it's not a guarantee.

The most expensive months to fly

The flip side: Some months are reliably expensive, and planning around them is part of being a savvy traveler.

July is consistently the most expensive month to fly both domestically and internationally. Summer vacation is in full swing, families are traveling, and airlines know demand is through the roof. December is up there as well, with fares spiking sharply in the two weeks before Christmas and again around New Year.

Other high-cost windows to watch out for:

• Late March and early April: spring break season, especially for popular beach and theme park destinations
• Late June: the start of peak European summer travel
• The week of Thanksgiving: one of the most expensive domestic travel windows of the year

If you have to travel during these periods, the key move is booking earlier than usual: 3–5 months out for domestic and 4–10 months out for international. Waiting will only cost you more.

Shoulder season 

Shoulder season is a traveler's secret weapon. These are the windows between peak and off-peak travel, close enough to good weather and open attractions but far enough from the crowds and premium pricing.

For Europe, the classic shoulder season windows are April–May and September–October. You'll find pleasant weather, fewer lines at the major sites, and flights that can run 20–40% cheaper than July or December fares. Southeast Asia has its own shoulder seasons, typically just before and after the rainy season, when weather is less than perfect but prices are much more forgiving.

Shoulder season isn't just about saving money. It's often the best time to actually experience a destination, before the crowds descend or after they've gone home. Think Paris in October, Japan in early April (cherry blossom season, but before Golden Week), or Costa Rica in late November. You'll find shorter lines, more authentic local experiences, and a few hundred dollars back in your pocket.

Cheapest days to fly and cheapest days to book (they're not the same)

This is one of the most common points of confusion for travelers: The cheapest day to fly is not necessarily the cheapest day to book. They're two different things, and mixing them up can cost you.

What is the cheapest day to book a flight?

When it comes to the actual day you board the plane, Tuesday, Wednesday, and Saturday consistently come out on top for lower fares. The logic is straightforward: Business and leisure travelers flood flights around the weekends (Mondays, Thursdays, Fridays, and Sundays), and that demand drives prices up on those days.

Midweek and Saturday departures see less demand (especially for international routes), and airlines price those seats more competitively. Studies suggest Tuesday and Wednesday international flights can run 10–20% cheaper than peak-day departures, which can save you a nice chunk of change, especially on long-haul tickets or for families with several travelers. 

It's not an ironclad rule. A fantastic deal on a Sunday flight is still a fantastic deal. But if you have flexibility on which day you depart, leaning toward mid-week can stack the odds in your favor.

Is there a cheapest day to book flights?

Short answer: Not really. Anyone claiming otherwise is probably repeating outdated advice.

The old "book on Tuesday" tip originated back when airlines released new fare inventory on Monday nights, which made Tuesday morning a brief window of opportunity. That world no longer exists. Today, airline pricing systems update continuously—sometimes dozens of times per day—based on algorithms that factor in demand, competitor pricing, seat inventory, and more.

There's no magic day of the week that unlocks cheaper fares. What matters far more is booking within the right window for your trip type (back to that Goldilocks Window), staying flexible on dates, and acting fast when you see a good price because, as we’ve said, prices are just as likely to go up tomorrow as they are to go down.

Pro tip: Use the "whole month" calendar view

One of the most underused features on flight search tools is the monthly calendar view. Instead of searching for a specific date and getting a single price, open up a full grid showing fares across an entire month. The cheapest days become very clear.

Google Flights does this well. Switch to the "Date grid" or "Price graph" view, and you can scan a month or two at a glance. You'll often spot a $50–$100 (or more) difference between midweek and weekend departures right there in the calendar.

If you have even a small window of flexibility, like leaving on a Tuesday or Thursday instead of a Friday, this view makes it immediately obvious which choice saves you money. It takes 30 seconds and can easily save you hundreds on an international ticket.

Best times to buy plane tickets by destination

Domestic US flights

Domestic flights experience seasonal price fluctuations based on holiday demand and peak seasons. Generally, spring and fall months offer more affordable fares as many schools are in session and fewer people travel. For domestic travel, aim for 1–3 months ahead of travel, while peak seasons require 3–5 months.

Flights to popular beach destinations like Florida and California tend to be more expensive during summer vacation rush. Similarly, the holiday season (November–December) sees a surge in flight prices, particularly for big cities like New York and Los Angeles. However, great fares pop up throughout the rest of the year regardless of these seasonal patterns.

International destinations by region

Europe

Book European flights 4–10 months in advance for summer travel, winter holidays, and other peak seasons (e.g. St. Patrick’s Day in Dublin, Oktoberfest in Germany). For the rest of the year, 1–3 months in advance will do. Peak summer travel (June–August) to popular destinations like London, Paris, Rome, Prague, and Amsterdam benefits from booking by March or April, at the absolute latest, to secure reasonable prices.

Winter is a great time to visit cities like Prague and Budapest for cheap flights, particularly where holiday markets are popular, but prices tend to be lower. Ski destinations in the Alps see tourist influxes, leading to higher prices for these locations.

Travel during April, May, September, and October is ideal for budget-conscious travelers because you can enjoy pleasant weather, avoid summer crowds, and find lower-priced flights to major European cities.

Asia

Asian destinations typically require booking 2–8 months in advance (4–10 months in advance for peak seasons like cherry blossom season and Lunar New Year). Popular destinations like Japan, Thailand, China, and India see significant price increases within two months of departure.

Flight prices to China and other East Asian destinations can soar during Lunar New Year when many people travel home for family gatherings. For countries like India, Sri Lanka, and Indonesia, monsoon season sees lower prices, though weather conditions can be unpredictable.

Central and South America

Book 2–8 months ahead for most Central and South American destinations. Winter and early spring (December–April) align with the dry season in many countries, and beach destinations see increased demand during this period.

Cities like Rio de Janeiro, Brazil, experience tourist influxes during the world-famous Carnival (February), so booking early is essential if visiting during this time. Hurricane seasons in Caribbean and Central American regions can create pricing volatility, with deals followed by sudden price increases as weather patterns become clearer.

Africa

African travel typically requires 2–8 months' advance booking. June to October is peak safari season in Kenya, Tanzania, and South Africa, and fares to these countries can be expensive during this period, so a longer lead time of 4–10 months is advised.

If you're looking for budget-friendly flights, consider traveling just before or after peak season to destinations like Mauritius during Diwali (October–November) or South Africa during Carnival season (February–March).

Oceania

Australia and New Zealand require 2–8 months' advance booking, with longer windows during their peak seasons (June–August, which coincide with US summer, and October–March, which coincide with warmer weather in the southern hemisphere and winter holidays). The limited number of airlines serving these routes means less competition and more price stability.

The shoulder seasons (April–June and September–November) offer more affordable fares as weather is still pleasant, but tourism demand has dropped. While winter months offer quieter periods and cheaper flights, colder temperatures may make them unsuitable for beach destinations or outdoor adventures.

Holiday and event booking strategy

Major US holidays

Thanksgiving is one of the most challenging holidays for flight booking, particularly around the US. To avoid the holiday rush and find affordable flights, it's best to book by August at the latest. The Wednesday before and Sunday after Thanksgiving are the most expensive and crowded travel days. If you're looking to save money, flying on Thanksgiving Day itself is usually cheaper than one or two days before.

Christmas and New Year travel also requires early preparations. To secure the best prices for Christmas flights, aim to book 4–10 months in advance. Consider alternative dates like Christmas Eve or New Year's Day for better pricing, and avoid the peak holiday week (December 20–26) when prices reach their highest.

Summer holiday weekends (Memorial Day, July 4th, Labor Day) see price spikes, but they’re not as dramatic as Thanksgiving and Christmas periods.

Global festivals and events

Major cultural events create massive demand surges requiring 4–10 months' advance booking. Prices can be 2–3 times normal levels during these periods, so early planning is essential for reasonable fares.

For Lunar New Year in China, book 4–10 months in advance, particularly for big cities like Beijing or Shanghai. The two weeks before and after typically see spikes in demand and higher fares as millions travel for family gatherings.

Rio de Janeiro Carnival similarly requires 4–10 months' advance booking due to its worldwide popularity drawing millions of visitors each year. Flying before Carnival kicks off, especially early in the month, helps avoid price hikes associated with the festival.

Día de Muertos in Mexico attracts tourists to Oaxaca and Mexico City in early November. To find the best deals for this holiday, book 4–10 months in advance, and be flexible with arrival and departure dates for better prices.

Sport and cultural events

Major sporting events, festivals, and cultural celebrations also affect both flight and accommodation pricing. Oktoberfest in Munich requires 4–10 months advance booking to secure reasonable fares. Similarly, aurora borealis viewings in Nordic countries, Alaska, and Iceland, require booking 4-10 months in advance. 

If you want to experience the Cherry Blossom Festival season, book your flights 4–10 months in advance for Japan destinations like Tokyo and Kyoto, or 3–5 months ahead for Washington, DC. Mardi Gras in New Orleans requires booking 3–5 months in advance to find affordable flights, as prices increase especially in the week leading up to Fat Tuesday.

Smart booking strategies and tools

Date flexibility benefits

Flexibility is key when it comes to booking affordable flights. Being open to traveling mid-week, at unconventional times like red-eye flights, or choosing less popular destinations during off-season can dramatically lower costs.

If you can shift your departure or return dates by even 1–3 days, you can save hundreds on international flights. Multi-city flights sometimes cost less than simple roundtrip tickets, especially when visiting multiple European cities with good ground transportation or low-cost airline connections. Similarly, open-jaw tickets (flying into one city, departing from another) can save you money. Plus, you get more interesting itinerary options to explore the region.

Book when the price looks right. Don't wait for "perfect."

Something that trips up even experienced travelers is the endless search for a better deal. You see a great price, you think "I'll check again tomorrow," and then tomorrow it's $80 more. Sound familiar?

Flight prices don't follow a predictable arc. They spike and dip based on demand signals that you and I can't see. When you're in the Goldilocks Window, and the price looks solid compared to what you've seen on that route, that's your cue. You don't need a perfect fare. You need a good fare at the right time.

A useful mental framework: Decide on your "pull the trigger" price before you start searching. If flights to Lisbon in October usually run $700–$900, and you see $580, that's your deal. Book it. Don't wait for $499 that may never come.

Price monitoring and comparison tools for the win

Instead of spending hours refreshing flight comparison sites, set up price alerts to stay informed when fares drop. Going’s flight experts monitor thousands of routes and send the deals that matter to you, including rare mistake fares for Premium and Elite members. Set alerts for multiple date ranges and nearby airports to maximize your chances of finding great deals within your travel timeframe.

If you really don’t want to miss a great deal, use a combination of these tools to catch them all:

• Going: Monitors thousands of routes around the clock and sends you alerts when fares drop to a price worth booking. Going Premium and Elite members also get access to rare mistake fares, which can be some of the best deals you'll ever see, up to 90% off the typical price.
• Google Flights: Great for flexible-date searches and price tracking on specific routes. Use the price graph and date grid views to spot the cheapest windows.
• Kayak and Skyscanner: Strong for comparing across multiple airlines and booking sites at once. Skyscanner's "Everywhere" search is particularly fun if you're open on destination.

The key is not to obsess over checking prices constantly. Let Going obsess over that for you. Instead, set your alerts, check in when you're notified, and trust that the experts will find you exactly the deal that you’re looking for. 

Be aware of trends

Fuel price fluctuations, economic conditions, and airline stability all influence flight pricing over longer periods. While you can't control these factors, understanding them helps set realistic price expectations and timing strategies.

For example, new route launches often feature promotional pricing for the first few months as airlines build market share. Airport construction or closures can also affect pricing on affected routes, creating opportunities or challenges depending on your flexibility.

Seasonal demand patterns tend to stay consistent year over year, so you can use them as a guide, unless they are disrupted by major external events like pandemics or economic shifts.

Miles, points, and loyalty optimization

Frequent flyer programs can provide significant value for regular travelers, but don't let loyalty override good deal-finding. Sometimes paying cash for a great deal makes more sense than using miles for poor redemption value.

A smart way to use your points is by transferring them from your credit card to your airline partners rather than redeeming for cash back to get better value from them. Using loyalty programs for premium cabins or long-haul flights is also a good alternative, as cash prices for these tickets are usually much higher than points or miles needed.

Destination flexibility strategies

If your goal is "somewhere warm in February" rather than "specifically Miami," you have much better chances of finding great deals. Using Going, you can get alerts for destinations you may never have considered, for 40–90% off the regular price. 

Consider nearby airports. Checking flights departing from or arriving at nearby airports often uncovers better deals, especially when secondary airports are served by budget carriers offering lower prices than major hubs dominated by legacy airlines.

Flight booking myths debunked: What actually affects airfare prices

"Tuesday is the cheapest day to book flights."

This is just plain false. Airlines once released fares on Tuesdays, but today pricing updates happen continuously, multiple times per day. No single booking day guarantees lower fares.

"August 23rd (National Cheap Flight Day) is the cheapest day to buy flights."

Every August, this one makes the rounds on social media, and every August it's just as misleading as the year before. The idea is that August 23rd—known as “National Cheap Flight Day”—is somehow a designated day when airlines drop their prices. 

It isn't. There's no such thing. This is a marketing creation, not an aviation industry standard, and it has no basis in how airlines actually set prices. Airlines don't coordinate to lower fares on a specific calendar date. Pricing is driven by demand algorithms, not national observances.

The irony? Any deals that happen to fall around August 23rd are a coincidence, or the result of a slow booking period for that particular route in that particular year. If you're holding off on booking a summer trip because you're waiting for August 23rd prices to hit, you're almost certainly going to be disappointed, and you’re likely going to pay more for it.

What actually works: Set price alerts on Going or Google Flights for your target route. When a real deal drops—whether it's July 8th or November 14th—you'll be the first to know.

"Booking flights late at night gets you cheaper deals."

This myth originated when airlines manually updated prices at dawn, so night owls booking in early hours sometimes got slightly cheaper fares. Sadly, that's not the case anymore. Time of day has no significant impact on flight prices. Airlines update their prices continuously based on market conditions, not your shopping schedule.

"Use incognito mode or delete cookies for better prices."

Contrary to the common myth, airlines and online travel agencies (OTAs) do not manipulate flight prices based on your browsing history, cookies, or past searches. This persistent myth suggests airlines raise prices if you visit repeatedly, but in reality, their pricing systems are far too complex for individual user manipulation.

So why does the price change when you switch to incognito mode or delete cookies? These slight price fluctuations are typically due to changes in demand or fare adjustments, not your browser settings. 

"Always trust fare predictions 100%."

Fare predictions can offer valuable insights into potential price trends, but it's important to approach them with caution. While these predictions are based on historical data and trends, they cannot guarantee exact changes a flight fare will undergo. Use predictions as one factor in decision-making, not as gospel truth.