How We Track Flight Prices

Every number on this site comes from our own price tracking. We do not guess, and we do not copy prices from other deal sites. Here is exactly how it works.

The tracking system

Our automated system checks round-trip fares three times a day, every day, across 33,852 routes departing from 106 US airports. Since 2025 we have recorded hundreds of millions of individual price observations. Each observation is stored with its route, travel dates, and the date we saw it.

Typical price

For every route we compute a typical price: the median of the fares we have observed on that route. Half the fares we have seen cost more than this number, half cost less. We also track the typical price for each travel month, because a route that costs $400 in September can cost $700 in March, and comparing against a single yearly number would be misleading.

What counts as a deal

A fare qualifies as a deal when it drops below the 25th percentile of everything we have seen on that route: cheaper than at least 75% of recorded fares. The deepest deals we send by email are verified again at send time, with real bookable dates, and we show the typical price next to the deal price so you can judge the discount yourself.

Data quality

Routes with thin data are labeled accordingly and held to a higher bar before we publish statistics about them. Charts on route pages show the sample behind them. When we do not have enough observations to say something with confidence, we say nothing instead.

Freshness

Deal alerts are generated from checks that ran the same day, and prices are re-verified shortly before an email goes out. Route statistics refresh continuously as new observations arrive.

Questions about the data, or want to use it in a story? Contact us. Want the deals themselves? Sign up free.