# Flights from Helsinki (HEL) to Seattle (SEA)

1 direct, 26 routes with 1 stop, 2528 with 2 stops. Straight-line distance 7673 km.

## Direct

Finnair flies direct, about 7697 km.

## Shortest routes

- HEL → SEA · 7697 km · about 580 min · 0 stops
- HEL → KEF → SEA · 8282 km · about 795 min · 1 stop
- HEL → CPH → SEA · 8727 km · about 770 min · 1 stop
- HEL → DUB → SEA · 9334 km · about 870 min · 1 stop
- HEL → AMS → SEA · 9388 km · about 877 min · 1 stop
- HEL → LHR → SEA · 9577 km · about 880 min · 1 stop
- HEL → FRA → SEA · 9759 km · about 875 min · 1 stop
- HEL → ORD → SEA · 9907 km · about 939 min · 1 stop

## How to query this

- JSON: https://travel.buy-it.gr/api/v1/routes/HEL/SEA
- This page: https://travel.buy-it.gr/api/v1/routes/HEL/SEA.md
- HTML, English: https://travel.buy-it.gr/en/flights/HEL-SEA
- All routes: https://travel.buy-it.gr/api/search?from=HEL&to=SEA&maxStops=2
- Operating days for one leg: https://travel.buy-it.gr/api/leg?from=HEL&to=SEA
- Price a path on one date: https://travel.buy-it.gr/api/price?path=HEL,SEA&date=2026-10-10

Replace airport codes in any of those URLs. `path` is comma-separated IATA codes, 2 to 5 airports. `date` is YYYY-MM-DD. `carriers` is optional, legs joined by `|` and airlines inside a leg joined by `.`, for example `FR|LO`.

The first flight must leave on `date`. Each following flight may leave that same day or the next day, and must depart at least 90 minutes after the previous flight lands. A response with `partial: true` on a calendar lists days a source has seen. It does not prove the other days are empty.

No API key. Responses are JSON unless the URL ends in `.md`. Prices are euros. `total: null` means no fare was found for the first flight on that date.