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Finding a cheap flight within Europe doesn't require luck or secret websites. It requires a small amount of strategy, a bit of flexibility and knowing which tools to use. This is everything you need to know.
The single biggest predictor of whether you'll find a cheap flight is how flexible you are. Flexible on:
If you have complete flexibility, you're in the best possible position.
Google Flights is the best starting point for European flight research. Key features to use:
Calendar view: Enter your departure and destination cities, then click the calendar view. You'll see a colour-coded calendar showing the cheapest dates across the entire month. Blue days are cheaper; red days are more expensive.
Price graph: Shows how prices vary across a 6-month window. You can spot patterns — for example, whether mid-October is consistently cheaper than late September.
Explore map: Don't know where you want to go? Enter your departure airport and search "everywhere." Google Maps fills with bubbles showing the cheapest fare to each destination from your chosen dates.
Price alerts: Set an alert for a route you're interested in. Google will email you when prices drop.
Skyscanner excels at two things Google Flights doesn't do as well:
"Everywhere" searches with filtering: You can search your airport to "everywhere" and then filter by region (Southern Europe, Eastern Europe), price range or trip duration.
Budget airline coverage: Skyscanner includes Ryanair, Wizz Air and other low-cost carriers that sometimes aren't fully indexed by Google Flights.
For the absolute cheapest fares, check budget airline websites directly once you know roughly where and when you want to go:
These airlines often have sales and promotions that don't appear on aggregators immediately. Sign up for their email newsletters to catch promotions.
The optimal booking window for European flights is typically 4–8 weeks in advance for short-haul routes. Outside of peak periods (school holidays, Christmas, summer peak):
Budget airlines are budget airlines because of how they add costs after the base fare.
Checked luggage: A checked bag typically adds €15–€40 per journey on Ryanair or easyJet. If you can travel with cabin baggage only, you save significantly. Check each airline's cabin baggage size limits — they differ.
Seat selection: Paying to choose a seat is optional on most routes. If you don't care where you sit, skip it.
Priority boarding: If you don't have checked baggage, this matters less. Cabin baggage fits in the overhead bin if you board early — priority boarding guarantees that. Without it, you might need to gate-check your bag (which is then free, but you wait at the other end).
Payment fees: Some airlines add a card fee. Ryanair has typically avoided this with a zero-fee Mastercard option.
The true cost of a "€9.99" flight is often €40–€70 once you add cabin bag, seat selection and return journey. Budget accordingly.
The single cheapest way to travel short-haul in Europe:
This means packing in approximately 8–12 litres of space. It's tight but workable for a 3–4 day city break.
A 40L cabin bag that meets most airlines' requirements (55×40×20 cm for Ryanair, 56×45×25 cm for easyJet) can be checked in for a weekend trip with room to spare for most travellers.
Hub-and-spoke vs point-to-point: Sometimes flying to a major hub (London Heathrow, Amsterdam Schiphol, Frankfurt) and then taking a second flight is cheaper than a direct route. This works particularly well for Eastern European destinations.
Mixing airlines: Book the outbound with one airline and the return with another. This requires you to manage two separate bookings, but can save money when one airline has a better deal in each direction.
Nearby airports: Paris has three airports (CDG, Orly, Beauvais). London has six (Heathrow, Gatwick, Stansted, Luton, Southend, City). Checking all options sometimes reveals significantly cheaper options on the same route.