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How to Find Cheap Flights: The Search Strategy
The cheapest fare is rarely the first one you see. How to search across airlines and OTAs, when to book, and the flexibility tricks that cut the price.
Published January 3, 2026 · AI-assisted editorial
The cheapest flight is rarely the one you see first. Airlines and booking sites all show different prices for the same seat, and the gap between the best and worst fare on a route can be hundreds of dollars. The trick is searching wide and staying flexible.
Search across everything, not one site
Start with a metasearch that scans airlines and online travel agencies at once. Aviasales compares fares across hundreds of airlines and agencies, so you see the real range before committing. For deeper discount-OTA inventory, eSky and Oojo often surface fares the big-name sites do not. Compare two or three and book whichever wins for your dates.
Be flexible where it pays
- Dates: shifting your trip a day or two either side of a weekend can drop the fare sharply. Use the "flexible dates" or month view.
- Airports: a nearby alternate airport is often cheaper — check both.
- Stops: one connection frequently beats a non-stop by a wide margin if you have the time.
When to book
There is no magic day, but the sweet spot for most international trips is roughly one to three months out — early enough to avoid last-minute spikes, late enough to dodge the earliest premium pricing. Set a price alert and book when it dips.
After you book
Lock in the rest while fares are fresh: a place to stay, data for your phone, and your airport transfer so arrival is sorted. And if your flight is later delayed or cancelled, you may be owed money — see our guide to flight compensation.
What we are watching
Fare transparency keeps improving as metasearch tools get better, but the spread between the cheapest and most expensive seat on a route is as wide as ever. The travelers who search across multiple sources and stay flexible on dates are the ones who consistently fly for less.