How to Find Cheap Flights: A Practical Guide
Finding cheap flights consistently comes down to a handful of repeatable habits — not luck. Here is the practical playbook.
Cheap flights are not rare. They appear every day on almost every route. The problem is that most travellers look too late, search too narrowly, or give up when the first price they see is expensive. This guide changes that.
Start with flexible dates
The single most effective way to reduce flight costs is to be flexible on travel dates. Price differences of 40–60 % between adjacent days are common, especially around weekends and school holidays. Before committing to specific dates, use a calendar view (Google Flights has a good one) to see the cheapest day in each week for your target route.
Even shifting your outbound or return flight by one day can save more than a month's worth of price monitoring.
Search from the right airports
For UK travellers, London alone has six airports: Heathrow, Gatwick, Stansted, Luton, City, and Southend. Budget airlines concentrate at Stansted and Luton. If you live within 90 minutes of any of them, always compare all six. The same destination can be £80 cheaper from a different London airport.
Similarly, if your destination city has multiple airports — Paris (CDG and Orly), Milan (MXP and BGY), Rome (FCO and CIA) — check both. Budget carriers often use the secondary airport.
Use price-tracking tools
Do not book the first price you see. Set up alerts for your target route so you are notified when the price drops below a threshold you choose. FairFares surfaces deals that are measurably below the 30-day median for each route — you do not have to remember to check.
Typical alert workflow:
- Identify your route and rough travel window
- Set an alert at a price you would happily book at
- Wait — prices move, and a drop often comes within two to four weeks
Avoid the high-demand calendar
The most expensive times to fly from the UK are predictable:
- School summer holidays (mid-July to end of August)
- Christmas and New Year (23 December to 3 January)
- February and Easter half-terms
- Bank holiday weekends
Flying just before or just after these windows — even by two or three days — often halves the cost. The cheapest times are generally mid-January to mid-February, the first two weeks of November, and September after the school return.
Book the right number of weeks ahead
There is no single magic booking window, but the data consistently shows:
- Short-haul Europe: 4–8 weeks ahead
- Medium-haul (Canaries, Turkey, Egypt): 8–14 weeks ahead
- Long-haul: 3–5 months ahead
Booking earlier than these windows does not always save money — airlines often hold back cheap seats and release them as departure approaches. Booking later means the cheap fare buckets are sold out.
Consider connecting flights for long routes
For longer routes, a one-stop itinerary can sometimes undercut the direct price significantly. The trade-off is travel time and the risk of a missed connection. If you do book a connecting flight, ensure the layover is with the same airline or alliance — self-transfer connections (booked separately) leave you stranded at your own cost if the first leg is delayed.