Finding cheap flights is easier than most travellers think — if you know where to look and when to book. This guide covers every proven strategy for booking cheap flights in 2025, from the best search tools to timing tricks that can save you hundreds of pounds per trip.
Why Cheap Flights Are More Achievable Than You Think
Airline pricing is a dynamic, algorithm-driven system. Fares change by the hour based on demand, available seats, and competitive pressure. This volatility works in your favour when you understand it. The travellers who consistently find cheap flights aren’t lucky — they’re informed.
1. Use the Right Flight Search Engines
Not all flight search engines are equal. The best tools for finding cheap flights in 2025 are Google Flights, Skyscanner, and Kayak. Use at least two simultaneously — each indexes different fares and airline deals.
Google Flights is best for its flexible date calendar, which lets you instantly see the cheapest days to fly across an entire month. Skyscanner’s “Everywhere” search reveals the cheapest destinations from your home airport — perfect for spontaneous travel.
2. Book on the Right Day and Time
Tuesdays and Wednesdays consistently offer the cheapest flights for domestic and European routes. For long-haul cheap flights, mid-week bookings typically beat weekend prices by 10–20%. The best time of day to book is early morning, when overnight fare changes have settled but demand hasn’t picked up.
3. Be Flexible on Dates and Airports
Date flexibility is the single most powerful tool for finding cheap flights. Shifting your departure by just one or two days can save £50–200 on a single ticket. Similarly, flying from or to a nearby secondary airport often cuts fares significantly — London Stansted vs Heathrow, or Paris Beauvais vs CDG, for example.
4. Set Price Alerts
Set price alerts on Google Flights and Skyscanner for every route you’re considering. When fares drop to your target price, you’ll be notified immediately — giving you first mover advantage. Pair alerts with our guide to flight deal alerts for a complete setup.
5. Book at the Right Time in Advance
For cheap domestic and European flights, the sweet spot is 6–8 weeks before departure. For long-haul cheap flights (transatlantic, Asia, Australia), book 3–6 months out. Booking too early (9+ months) or too late (under 2 weeks) almost always means higher fares.
6. Use Incognito Mode When Searching
Some flight search engines track repeat searches and may show higher prices to users who’ve searched the same route multiple times. Search in a private/incognito browser window to avoid this, and clear your cookies between searches.
7. Consider Budget Airlines
Budget carriers like Ryanair, easyJet, Wizz Air, and Norwegian can offer genuinely cheap flights — but read the small print. Baggage fees, seat selection charges, and check-in fees can quickly inflate a “cheap” base fare. Always calculate the total cost before booking.
8. Book One-Way Tickets Separately
For international travel, booking two separate one-way tickets — potentially with different airlines — often beats a return fare. This is especially effective on transatlantic routes where Expedia and individual airline sites offer different pricing for each direction.
9. Use Miles and Points
Frequent flyer miles can make flights genuinely free — or dramatically cheaper. Read our full guide to using airline miles and points to understand how to earn and redeem for maximum value.
Search for Cheap Flights Now
Use the search tool below to compare cheap flights across hundreds of airlines and booking sites:
Final Thoughts
Finding cheap flights consistently comes down to flexibility, timing, and using the right tools. Apply these strategies together — flexible dates, the right search engines, price alerts, and incognito browsing — and you’ll consistently pay far less than the average traveller. Also explore our guide to the cheapest days to fly and our comparison of flight search engines.
