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Ultra Low Fare Flights from Boston (BOS) to Seattle (SEA) with Spirit

Fly Boston to Seattle and Save Big

*Fares presented below are available at the beginning of each day, but may sell out. Additional baggage fees and fees for other services may apply. Other terms and conditions may apply.

  1. BOS-SEA

    From Boston to Seattle

    Departing 01/23/2019

    Fares From
    $84*

    One Way

  2. BOS-SEA

    From Boston to Seattle

    Departing 01/24/2019

    Fares From
    $131*

    One Way

  3. BOS-SEA

    From Boston to Seattle

    Departing 01/18/2019

    Fares From
    $242*

    One Way

Ultra Low Fare Flights from Boston (BOS) to Seattle (SEA) with Spirit

Boston to Seattle Flight Deals

*Fares presented below are available at the beginning of each day, but may sell out. Additional baggage fees and fees for other services may apply. Other terms and conditions may apply.

  1. From Boston (BOS) to Seattle (SEA)

    One Way

    Departing 04/02/2019

    Fares From
    $242*
  2. From Boston (BOS) to Seattle (SEA)

    One Way

    Departing 03/14/2019

    Fares From
    $336*

Weather in Seattle

Sunday ,heavy intensity rain
6°C 12/09/2018
Monday ,light rain
6°C 12/10/2018
Tuesday ,heavy intensity rain
6°C 12/11/2018
Wednesday ,moderate rain
6°C 12/12/2018
Thursday ,heavy intensity rain
5°C 12/13/2018
Friday ,heavy intensity rain
8°C 12/14/2018
Saturday ,very heavy rain
12°C 12/15/2018
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