To find a cheap flight, three levers matter more than anything else: flexibility on dates, comparing departure and arrival airports, and working out the total price (bags, seat, transfer) before you book. There is no magic day and no hidden trick that guarantees the lowest fare.
This page, which complements our budget travel section, sums up a simple method you can apply to every search, and reminds you of your rights if a flight covered by EU Regulation 261/2004 or its UK equivalent is delayed or canceled.
The essentials
- Compare over several weeks with a price calendar, not on a single date.
- Widen your search to nearby airports, both at departure and at arrival.
- Compare the final price with a bag, not the headline fare.
- Set a price alert and book when the fare matches your budget.
- If you arrive at least 3 hours late on a flight covered by EU Regulation 261/2004, compensation of €250 to €600 may be due; under UK261, £220 to £520.
1. Make your dates flexible
The price of a flight depends mostly on demand. School holidays, bank-holiday weekends and long weekends push fares up. Moving departure by two or three days, or flying midweek, often changes the price more than any other trick.
- Use the « calendar » or « whole month » view of comparison sites to see the gap from one day to the next.
- Avoid the first and last days of school holidays.
- Aim for the shoulder seasons: spring and autumn often give a good balance of weather and price. Our Where to go in… section helps you choose the month.
2. Widen your airports
A big city often has several airports, and a destination may be served by a cheaper secondary airport. Always check the cost and duration of the transfer to the center: a distant airport can cancel out the saving.
Think about departure too: a regional airport near you, or a train to a hub, can open up different fares. Then add the price of the train or parking.
3. Compare the total price, not the headline fare
Airlines increasingly sell tickets with options. Before you click, rebuild the real price of your trip.
| Item | What to check before paying |
|---|---|
| Cabin bag | Size and weight allowed for free; possible extra charge for a cabin suitcase. |
| Checked bag | Price each way; it is often cheaper to add it when you book than at the airport. |
| Seat selection | Paid at many airlines; unnecessary if you travel alone. |
| Check-in | Some airlines charge for airport check-in or a boarding pass printed at the airport. |
| Payment method | Possible card fees, currency conversion. |
| Transfer | Shuttle, train or taxi from the arrival airport. |
A comparison site helps you spot the options; then check the same flight on the airline’s own site. The price may be the same, sometimes lower, and handling a change or a refund is generally simpler when you book direct.
4. When to book?
No fixed rule applies to every route. For periods of high demand (school holidays, end-of-year festivities, summer), booking early limits the risk of finding only high fares. For a short trip outside holidays, prices move less and you can wait longer.
- Set a price alert on the route and dates you want.
- Set a maximum budget: when the fare drops below it, book.
- Do not count on a last-minute drop in high season. Last-minute deals mostly concern package holidays outside school holidays.
Private browsing is no guarantee of a lower price: variations come first from seat availability. Simply compare on several sites and at several moments.
5. Connecting flights, one-way tickets and open-jaw
A flight with a connection can cost less than a nonstop, at the price of a longer trip. If you combine two separate tickets yourself, note that if the first flight is delayed, the second airline has no obligation to you: allow a wide margin or a night on the spot. The UK Civil Aviation Authority makes the same point: with separate bookings (« self-transfer »), you do not have a statutory right to care, compensation or transport to your last destination if delays mean you miss a flight (CAA, read 12 November 2026).
Also compare two one-way tickets and the « open-jaw » (arriving in one city, leaving from another): useful for a multi-stop trip, for example in Italy or Spain.
6. Your rights in case of delay, cancellation or denied boarding
Regulation (EC) No 261/2004 applies in particular to flights departing from the European Union and to flights to the EU operated by an EU airline. According to the official Your Europe portal (amounts, distances and procedures are detailed in our guide to flight delay compensation):
- for a delay of at least 3 hours on arrival, a cancellation (notified less than 14 days before departure) or denied boarding, compensation may be due, unless there are extraordinary circumstances that the airline must prove;
- for a delay at departure, the airline must provide assistance (meals, refreshments, accommodation if needed) from 2 hours’ delay for flights of 1,500 km (932 mi) or less;
- from 5 hours’ delay at departure, you can give up the flight and ask for a refund;
- for a cancellation, you can choose between a refund and rerouting.
| Flight distance | Compensation (EU Regulation 261/2004) |
|---|---|
| Up to 1,500 km (932 mi) | €250 |
| More than 1,500 km within the EU, and other flights of 1,500 to 3,500 km (932 to 2,175 mi) | €400 |
| More than 3,500 km (2,175 mi) (not intra-EU) | €600 |
The UK has its own version, UK261, which covers flights departing from a UK airport on any airline, flights arriving in the UK on an EU or UK airline, and flights arriving in the EU on a UK airline. The UK Civil Aviation Authority gives fixed compensation of £220 for flights under 1,500 km, £350 for 1,500 to 3,500 km, and £260 or £520 for flights over 3,500 km depending on the delay (arriving three to four hours late, or more than four hours late), for a delay of more than three hours at the destination airport and unless the delay was caused by extraordinary circumstances (CAA, read 12 November 2026).
For flights within and from the United States, the rules are set by the U.S. Department of Transportation and differ from the European ones; see the Department of Transportation’s aviation consumer protection pages at transportation.gov before you rely on any of the figures above.
For lost, damaged or delayed checked baggage, the airline is liable up to around €1,300. Claims must be made in writing within 7 days (damage) or 21 days after you receive a delayed bag. Keep boarding passes, tags and receipts for expenses.
Make your claim directly to the airline first. If you get no satisfactory answer, the European portal lists the competent national bodies. A claims company is not required and takes a commission.
7. Which site should you use for a cheap flight?
No site is always the cheapest. The three types of site play different roles: use them together.
| Type of site | Strength | Watch out for |
|---|---|---|
| Comparison site (metasearch) | Overview of airlines, price calendar, alerts | It redirects you to a seller: check who takes the payment. |
| Online travel agency | Flight combinations, sometimes lower fares | Possible service or change fees; if there is a problem, the agency is your contact. |
| Airline website | Direct handling of a change, cancellation or refund | Shows only its own flights and its partners’. |
Before paying on a site you do not know, check its legal notice, its terms of sale and the final amount shown at the last step.
8. Which day to fly to pay less?
The day of the flight matters more than the day you book. Friday and Sunday departures, in high demand, are often more expensive than Tuesday or Wednesday ones, but it depends on the route: check with the calendar view rather than trusting a general rule. Very early morning or late evening flights are also often less in demand.
For a long stay, the choice of destination weighs as much as the dates. See also our guides to last-minute travel, cheap weekend breaks and, for short trips, traveling by train. On the ground, our currency converter helps you estimate exchange costs.
Checklist before you pay
- First and last name identical to your passport.
- Departure and arrival airports checked (not a city with the same name).
- Realistic times with the transfer.
- Included bags match your needs.
- Change and cancellation conditions read.
Frequently asked questions
What is the best day to book a flight?
No booking day guarantees a lower price. What counts is the flight dates: flying midweek and outside school holidays often lowers the price.
Are low-cost airlines always cheaper?
Not always. Once the bag, the seat and the transfer from a distant airport are added, a traditional airline can come out at the same price. Compare the total price.
Can I get compensation for a low-cost flight?
Yes, Regulation 261/2004 (and UK261) applies whatever the type of airline, as long as the flight falls within its scope (departing from the EU or UK, or arriving there on an EU or UK airline).
Should I book direct with the airline?
Comparing on a comparison site then booking direct is often simpler for handling a change or a refund. Check the price is the same.
Does the price go up if I look at a flight several times?
Nothing reliably shows it. Prices mostly move with the seats left. A price alert is more useful than private browsing.
Which is the cheapest site for a flight?
No site is cheapest all the time. Spot fares on a comparison site, then check the same flight on the airline’s site and compare the final price, bags included.
Do flights get cheaper at the last minute?
Rarely in high season, because the remaining seats are the most expensive. Outside holidays, on low-demand routes, drops exist, but nothing guarantees them.
Our sources
- Your Europe, air passenger rights (europa.eu, consulted on 5 October 2026)
- UK Civil Aviation Authority, Delays, Cancellations (read 12 November 2026)
- U.S. Department of Transportation, aviation consumer protection (not readable on 12 November 2026: figures not reproduced)
- Our methodology
Updated November 2026.