Cheap flights from Seattle to Boston

Direct flight: 4,004 km, ~4h 43m from Seattle (SEA) to Boston (BOS).

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Live fares · SEA → BOS

Frequently asked questions

  • How long is the flight from Seattle to Boston?

    Direct flights from SEA to BOS cover approximately 4,004 km (2,488 miles), with an estimated flight time of 4h 43m. Operating airlines: AS, B6, DL.

Related guides for this route

Sibling pages — full route detail, airport overviews, visa context, per-airline routes.

Full route page: SEA → BOS Cheapest month to fly to Boston All flights from Seattle All flights to Boston Flights to USA Visa-free with USA passport AS routes B6 routes DL routes