What Tern does
One search returns the cheapest fare, the fastest trip, the earliest arrival, an AI-balanced pick, and the lowest delay-risk option — plus what each fare could cost in transferred card points. You see what every choice trades away, then book through the airline or our booking partners.
What we refuse to do
- No invented urgency. No fake countdowns, no "3 seats left" we can't verify.
- No invented deals. Promotions link to the airline's own pages; if we can't verify a claim, we don't show it.
- Honest risk signals. The delay-risk score is a relative estimate from the itinerary's shape — stops, timing, and connections — labeled as an estimate, never dressed up as live delay data.
How we make money
Tern is free to use — here's how it stays that way, stated plainly instead of buried.
- Free to use. No ads, and we never sell your data.
- When you book through a partner — the Duffel-powered checkout or the Aviasales booking site — Tern may earn a small commission, at no extra cost to you.
- Your ranking is never for sale. Results are ordered only by the sort you pick, and we don't invent discounts or “sponsored” tags.
The full detail is in our Terms and Privacy Policy.
The name
The Arctic Tern flies from pole to pole every year — the longest migration of any animal we know of. It spends its life chasing summer along the most efficient route it can find.
That is the entire product idea: find the best route, honestly, and go. The boarding pass in our hero carries a tern for the same reason.