When Are Flights Cheapest? Best Days & Times to Book

Here’s what you need to know straight away: if you want cheap flights , booking months in advance is usually better than chasing last-minute deals. For most flights within Europe (your “domestic” style trips), the optimal booking window is about 1–3 months in advance. You may even find cheap spring break flights on short notice. For holiday flights, like Christmas, New Year, Easter, or spring break, you’ll usually find the cheapest holiday flight fares roughly 4–6 months in advance. We’ve seen early birds save up to 20% on average compared to close-in ticket prices.

Here’s another easy win: day of the week matters for the departure date. Flying mid-week can also save you up to 10–20% compared to peak travel days like Fridays and Sundays. That’s because airline tickets are priced dynamically; most airlines adjust fares based on pricing trends, demand, and fare categories, and both business and leisure travellers tend to favour weekends.

There are several other important things you should know about flight prices and timing, but before we dive in, here’s a quick overview of optimal booking windows for European travellers:

These ranges come from past performance and historical data across many popular destinations, and while prices rise and fall all the time, they give you a solid starting point for planning your trip.

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What Day and Time are Flights the Cheapest to Book?

Before we get into the details, it’s worth clearing up two big myths about buying flights. First, there’s no magic “cheap Tuesday” anymore. Day of the week price differences are usually tiny, although recent UK data shows Sunday as a consistently good day to buy plane tickets, while Fridays and Mondays are usually the most expensive days to book a flight.

Second, the exact time of day you buy doesn’t reliably unlock lower ticket prices. Modern airlines and travel agencies update plane tickets in real time throughout the day based on demand, remaining seats, and competitors. The smartest move is to monitor prices using price alerts (for example, on Google Flights) and book as soon as you see a genuinely good price drop, rather than waiting for some “perfect” moment and missing the best deals.

Cheapest Days to Book Flights

The myth that Tuesday is the magical day for lower prices has been thoroughly debunked by recent airline industry analysis. Although day-of-week differences are minimal (typically just 1.3% variation), Sunday consistently emerges as the winner for securing the best rates.

Well, at least for domestic travelers from the UK. When they book domestic flights on Sundays, Brits can save up to 21%, meanwhile international flights yield 24% savings.

This pattern exists because airlines often release their weekly sales and adjust pricing over the weekend, with Sunday representing the sweet spot before business travelers begin booking for the upcoming week.

It’s unclear whether it holds true for other European countries. Yet, there’s one we know for certain: Fridays and Mondays tend to be the most expensive booking days, with smaller differences across the rest of the week.

Cheapest Time of Day to Book Flights

The belief that booking at midnight or 3 AM yields better prices is largely a myth perpetuated by outdated information. Modern airline pricing systems update continuously throughout the day based on real-time demand data, competitor pricing, and inventory levels.

However, there are subtle advantages to booking during off-peak hours. Booking early morning flights (6-8 AM) occasionally catches overnight price adjustments before they’re widely discovered. Similarly, late evening bookings (10 PM-midnight) might capture end-of-day pricing updates.

The more significant factor is booking immediately when you spot a good deal rather than waiting for a potentially better time of day. Flight prices can change multiple times daily, and hesitating over the “perfect” booking time often results in missing good deals entirely.

When Are Flights Cheapest to Fly?

Now that we’ve covered when you should book flights, it’s time to talk about the departure date. The truth is, when you actually fly matters more than when you book. Choosing the right day of the week, month, and time of day to fly can save you more on travel expenses than any secret booking trick.

For European travellers, the cheapest days often fall on Tuesday, Wednesday, and Thursday, both for intra-European flights and many international tickets. You’ll usually find better flight deals during off-peak months like January–March and late September–early November, as well as in the shoulder season for international travel to North America, Asia, and Africa.

When it comes to the cheapest time of day to fly, you can often shave even more off your ticket by choosing early morning flights (6–9 a.m.) or late-night red-eye flights, which tend to be cheaper and come with fewer delays than busy daytime departures, especially on nonstop flights on popular routes.

What are the Cheapest Days to Fly?

Tuesday, Wednesday, and Thursday consistently rank as some of the cheapest days to fly for many European domestic flights (intra-Europe) and short-haul routes, with average savings starting at around 10% compared to weekends.

These mid-week flights benefit from lower demand: most business travelers prefer Monday or Friday travel, while leisure travelers usually favour peak travel periods like Friday evenings and Sunday returns to visit family or end holiday trips.

For international flights, mid-week departures also tend to offer lower prices and more availability in different fare categories, especially if you avoid school breaks and major holidays like Christmas Day and Easter.

What are the Cheapest Months to Fly?

Now, let’s talk about the cheapest months for international travel and domestic flights in Europe. For many routes, ticket prices drop in January–March (outside school holidays), with average savings of around 10–15% compared to peak summer months. These post-holiday months are often the travel industry’s slowest period, with reduced business travel and minimal leisure demand, which are the ideal conditions for cheap airline tickets.

Meanwhile, August can provide surprising value for summer flight deals, averaging around 15% cheaper than June for some popular European city trips, despite being the peak vacation season. This happens because August is often the tail end of summer travel demand for many families, whose travel plans centre around earlier school breaks.

If you’re not a huge fan of peak summer crowds, pushing your trip to late September–early November can generate solid savings versus travelling in peak July/August or over Christmas. These shoulder months often bring the best price mix for both domestic flights and international tickets from Europe.

Planning a long-haul international trip outside of Europe? Routes to North America, Asia, and Africa are generally cheaper in each region’s shoulder season. Consider spring and autumn for city breaks, and the weeks just before or after major local holiday peaks. Often, that’s the sweet spot for international fares and last-minute flight deals if demand is softer than expected.

Cheapest Time of Day to Fly

Early morning flights, especially departures between about 6 and 9 a.m., often sit among the lowest fares because fewer people are willing to wake up that early. Aside from significant savings, early trips benefit from fewer delays and better on-time performance as the day’s schedule hasn’t had time to unravel.

For European travellers, red-eye flights (late-evening or overnight departures, typically after 9 p.m. on long-haul or longer intra-European routes) can offer similar savings opportunities, as they’re less popular and airlines frequently price them more aggressively to fill seats.

Meanwhile, mid-day flights (around 11 a.m.–2 p.m.) usually occupy a middle ground: they’re not as cheap as the very earliest or latest departures, but can sometimes be slightly less expensive than classic rush-hour slots, while still offering reasonable convenience for both business and leisure trips.

How Many Weeks in Advance Should You Book?

For European travellers, the optimal booking window depends on whether you’re flying within Europe or on a long-haul flight. For most intra-European routes, a practical rule for how far in advance to book flights is around 1–3 months before departure, stretching to 3–6 months ahead for peak summer or Christmas dates. This is usually when airlines have loaded most of their fares but haven’t yet pushed up prices for close-in demand.

For long-haul flights from Europe to North America, Asia, or Africa, good deals often appear roughly 1–4 months before departure, with 4–8 months being sensible for busy seasons and school holidays to lock in both price and seat choice. Holiday periods like Christmas, New Year, Easter, and August often reward those who book 10–24 weeks in advance, as airlines know demand will be strong regardless of price.

The key is to avoid both extremes: booking a year out can mean paying more before competitive pricing really kicks in, while relying on last-minute flights (especially in peak season) usually leads to higher fares, as airlines capitalise on urgent, inflexible travellers.

Do Flights Get Cheaper Closer to the Date?

In Europe, flight prices usually creep up the closer you get to departure, and they often jump noticeably in the last week or two. Airlines know that many late bookers are travelling for work, emergencies, or fixed events, so they’re less price-sensitive. The truth is, the revenue systems are designed to take full advantage of these circumstances.

That’s why relying on last-minute flights as a money-saving strategy is a bit like gambling: sometimes you win, but most of the time you pay more than if you’d booked earlier.

That said, last-minute bargains do happen, especially with low-cost carriers like Ryanair, Wizz Air, or easyJet on quieter routes or off-peak dates. Just remember these are exceptions, not the norm.

Modern “basic economy” or hand-luggage-only fares can also make close-in tickets look cheap at first glance, but once you add bags, seat selection, or flexibility, the price can shoot up. So if you’re flexible and don’t mind some risk, you can watch prices in the final weeks and pounce on a deal. But it’s smart to have a backup plan and accept that fares are still more likely to rise than fall as your travel date gets closer.

Tips to Find Cheap Flights Any Time of Year

Finding cheap flights requires a combination of strategic timing, flexible planning, and smart use of available tools. Here are the most effective approaches for securing discount flights regardless of when you need to travel:

Set Up Price Alerts Early

Configure price alerts on Google Flights, Kayak, and Skyscanner at least 3 months before your intended travel date. These tools monitor price fluctuations and notify you when fares drop, allowing you to book at optimal moments without constant manual checking.

Embrace Flexible Date Searching

Use flexible date search tools that show pricing across multiple days or weeks. Often, shifting your departure by just one day can result in significant savings, particularly when moving from weekend to weekday travel.

Consider Alternative Airports

Major metropolitan areas often have multiple airport options, and smaller or secondary airports frequently offer lower fares. Factor in ground transportation costs, but don’t overlook potential savings of $50 or more per ticket.

Explore Multi-City and Open-Jaw Options

Sometimes booking separate one-way tickets or creating multi-city itineraries costs less than traditional round-trip bookings. This strategy works particularly well for international travel with multiple destinations.

Monitor Airline Sales and Error Fares

Follow airlines on social media and subscribe to deal newsletters from sites like Secret Flying and Scott’s Cheap Flights. Error fares and flash sales can offer extraordinary savings for travelers ready to book quickly.

Use Incognito Mode Strategically

While browsing history doesn’t affect airline pricing as commonly believed, incognito flight booking prevents websites from storing cookies that might influence the deals and promotions shown to you.

Book Connecting Flights Separately

Sometimes booking legs of a journey separately costs less than a single ticket, particularly when mixing low-cost carriers with traditional airlines. However, this strategy requires careful timing and carries risks if connections are missed.

Consider Basic Economy Carefully

Basic economy tickets offer lower base prices but include restrictions that can eliminate savings through additional fees. Calculate total costs, including seat selection, baggage, and change fees, before booking.

Time Your Booking for Sales Periods

Airlines typically launch sales during slower booking periods, particularly in January, September, and mid-week periods. Planning major trip bookings around these patterns can yield significant savings.

Leverage Credit Card Benefits

Travel rewards credit cards offer points, miles, and sometimes statement credits that effectively reduce flight costs. Some cards also provide booking portals with exclusive deals or bonus point earnings.

Find and Book the Cheapest Flights Now

Data still makes one thing very clear: strategic timing beats random booking every time. For most intra-European flights, a good target for how far in advance to book flights is around 1–3 months before departure, stretching to 3–6 months for peak dates like August, Christmas, or Easter. Try to book on a Sunday when you can (it’s often cheaper than Fridays), and aim to fly Tuesday–Thursday, which usually undercuts busy Friday and Sunday departures.

The cheapest flights still reward flexibility: early morning and late-night flights tend to be less popular and often priced more aggressively, while mid-week travel gives you the biggest savings opportunities. This is exactly where Kiwi shines: our search engine lets you mix low-cost carriers, combine alternate airports, and set smart price alerts so you catch great deals the moment they appear.

Flight Pricing FAQs

Why do flight prices change?

Airlines use dynamic pricing systems that adjust fares based on real-time demand, competitor pricing, remaining seat inventory, and booking patterns. Prices can change multiple times daily as these factors fluctuate, which is why you might see different prices when checking the same flight hours apart.

Do flight prices go down at night?

Flight prices don’t systematically drop at night, as airline pricing systems operate continuously. However, overnight price adjustments occasionally occur, making early morning bookings potentially advantageous for catching these updates before they’re widely noticed.

What’s the best time to buy domestic flights?

The best time to buy domestic flights is 34–86 days before departure, with Sunday being the optimal booking day. This window provides the best balance between airline inventory availability and pricing, typically resulting in 25% savings compared to last-minute bookings.