Select journey type

Enter to select travel class and passengers

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

Fly Seattle to Boston 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. SEA-BOS

    Seattle to Boston

    Departing 02/12/2019

    Fares From
    $89*

    One Way

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

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

    One Way

    Departing 05/01/2019

    Fares From
    $152*

Weather in Boston

Sunday ,light snow
-13°C 01/20/2019
Monday ,light snow
-13°C 01/21/2019
Tuesday ,sky is clear
-6°C 01/22/2019
Wednesday ,moderate rain
1°C 01/23/2019
Thursday ,heavy intensity rain
12°C 01/24/2019
Friday ,sky is clear
3°C 01/25/2019
Saturday ,light snow
5°C 01/26/2019
Powered by: OpenWeatherMap.org