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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 09/26/2018

    Fares From
    $110*

    One-way

  2. SEA-BOS

    Seattle to Boston

    Departing 09/05/2018

    Fares From
    $110*

    One-way

  3. SEA-BOS

    Seattle to Boston

    Departing 08/28/2018

    Fares From
    $110*

    One-way

  4. SEA-BOS

    Seattle to Boston

    Departing 09/04/2018

    Fares From
    $114*

    One-way

  5. SEA-BOS

    Seattle to Boston

    Departing 11/08/2018

    Fares From
    $139*

    One-way

  6. SEA-BOS

    Seattle to Boston

    Departing 09/13/2018

    Fares From
    $162*

    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 12/18/2018

    Fares From
    $110*
  2. Seattle (SEA) to Boston (BOS)

    One-way

    Departing 11/28/2018

    Fares From
    $110*
  3. Seattle (SEA) to Boston (BOS)

    One-way

    Departing 11/27/2018

    Fares From
    $183*
  4. Seattle (SEA) to Boston (BOS)

    One-way

    Departing 12/15/2018

    Fares From
    $184*
  5. Seattle (SEA) to Boston (BOS)

    One-way

    Departing 12/13/2018

    Fares From
    $209*
  6. Seattle (SEA) to Boston (BOS)

    One-way

    Departing 12/19/2018

    Fares From
    $284*
  7. Seattle (SEA) to Boston (BOS)

    One-way

    Departing 11/26/2018

    Fares From
    $336*

Weather in Boston

Thursday ,moderate rain
25°C 08/16/2018
Friday ,light rain
24°C 08/17/2018
Saturday ,moderate rain
26°C 08/18/2018
Sunday ,heavy intensity rain
20°C 08/19/2018
Monday ,heavy intensity rain
18°C 08/20/2018
Tuesday ,light rain
24°C 08/21/2018
Wednesday ,light rain
25°C 08/22/2018
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