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Seattle-Tacoma International Airport to Boston Logan International Airport flight

Explore the cheapest one-way and round-trip flights from Seattle-Tacoma International Airport to Boston Logan International Airport over the next 90 days, with one-way fares from CAD 209 and round-trip from CAD 478. Based on Trip.com's latest 7-day flight data.

      • Cheapest nonstop
        SEA 23:55
        5h 21m
        Direct
        BOS 08:16
        Seattle - Boston | Sat, Oct 24 | Jetblue Airways
        BOS 19:20
        6h 22m
        Direct
        SEA 22:42
        Boston - Seattle | Wed, Oct 28 | Jetblue Airways
        CAD 478 CAD 605
        21% off
        21% off
        CAD 605 CAD 478
      • SEA 23:55
        5h 21m
        Direct
        BOS 08:16
        Seattle - Boston | Sun, Oct 25 | Jetblue Airways
        BOS 19:20
        6h 22m
        Direct
        SEA 22:42
        Boston - Seattle | Thu, Oct 29 | Jetblue Airways
        CAD 479 CAD 605
        21% off
        21% off
        CAD 605 CAD 479
      • SEA 14:59
        11h 22m
        1 stop
        BOS 05:21
        Seattle - Boston | Sun, Nov 1 | Alaska Airlines
        BOS 07:51
        10h 26m
        1 stop
        SEA 15:17
        Boston - Seattle | Thu, Nov 5 | Alaska Airlines
        CAD 500 CAD 605
        17% off
        17% off
        CAD 605 CAD 500
      • SEA 06:00
        10h 59m
        1 stop
        BOS 19:59
        Seattle - Boston | Sun, Oct 25 | American Airlines
        BOS 19:20
        6h 22m
        Direct
        SEA 22:42
        Boston - Seattle | Thu, Oct 29 | Jetblue Airways
        CAD 500
        17% off
        CAD 605 CAD 500
      • SEA 10:43
        7h 43m
        1 stop
        BOS 21:26
        Seattle - Boston | Fri, Nov 20 | American Airlines
        BOS 06:00
        8h 34m
        1 stop
        SEA 11:34
        Boston - Seattle | Mon, Nov 23 | American Airlines
        CAD 510
        16% off
        CAD 605 CAD 510
      • SEA 12:49
        7h 50m
        1 stop
        BOS 23:39
        Seattle - Boston | Sat, Oct 24 | American Airlines
        BOS 08:23
        8h 54m
        1 stop
        SEA 14:17
        Boston - Seattle | Wed, Oct 28 | American Airlines
        CAD 510
        16% off
        CAD 605 CAD 510
      • SEA 10:43
        7h 43m
        1 stop
        BOS 21:26
        Seattle - Boston | Sat, Nov 21 | American Airlines
        BOS 06:00
        8h 34m
        1 stop
        SEA 11:34
        Boston - Seattle | Mon, Nov 23 | American Airlines
        CAD 511
        16% off
        CAD 605 CAD 511
      • SEA 23:59
        7h 34m
        1 stop
        BOS 10:33
        Seattle - Boston | Sat, Oct 31 | American Airlines
        BOS 15:06
        9h 16m
        1 stop
        SEA 21:22
        Boston - Seattle | Tue, Nov 3 | American Airlines
        CAD 511
        16% off
        CAD 605 CAD 511
      • SEA 08:24
        7h 31m
        1 stop
        BOS 18:55
        Seattle - Boston | Sun, Nov 1 | American Airlines
        BOS 18:16
        9h 20m
        1 stop
        SEA 00:36
        Boston - Seattle | Thu, Nov 5 | American Airlines
        CAD 514
        15% off
        CAD 605 CAD 514
      • SEA 13:00
        17h 25m
        1 stop
        BOS 14:00
        Seattle - Boston | Mon, Oct 12 | Normal Airline
        BOS 15:00
        6h
        Direct
        SEA 16:00
        Boston - Seattle | Wed, Oct 14 | Normal Airline
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      • Cheapest nonstop
        SEA 23:40
        5h 22m
        Direct
        BOS 08:02
        Seattle - Boston | Mon, Nov 16 | Alaska Airlines
        CAD 216 CAD 280
        23% off
        23% off
        CAD 280 CAD 216
      • SEA 22:00
        5h 33m
        Direct
        BOS 06:33
        Seattle - Boston | Mon, Nov 16 | Delta Air Lines
        CAD 220 CAD 280
        21% off
        21% off
        CAD 280 CAD 220
      • SEA 16:27
        21h 38m
        1 stop
        BOS 17:05
        Seattle - Boston | Wed, Nov 11 | Frontier Airlines
        CAD 209 CAD 280
        25% off
        25% off
        CAD 280 CAD 209
      • SEA 16:54
        9h 27m
        1 stop
        BOS 05:21
        Seattle - Boston | Thu, Oct 29 | Alaska Airlines
        CAD 233
        17% off
        CAD 280 CAD 233
      • SEA 16:54
        9h 27m
        1 stop
        BOS 05:21
        Seattle - Boston | Thu, Oct 22 | Alaska Airlines
        CAD 235
        16% off
        CAD 280 CAD 235
      • SEA 14:59
        11h 22m
        1 stop
        BOS 05:21
        Seattle - Boston | Sun, Oct 25 | Alaska Airlines
        CAD 235
        16% off
        CAD 280 CAD 235
      • SEA 14:59
        11h 22m
        1 stop
        BOS 05:21
        Seattle - Boston | Thu, Oct 15 | Alaska Airlines
        CAD 235
        16% off
        CAD 280 CAD 235
      • SEA 14:59
        11h 22m
        1 stop
        BOS 05:21
        Seattle - Boston | Mon, Nov 2 | Alaska Airlines
        CAD 236
        16% off
        CAD 280 CAD 236
      • SEA 22:48
        8h 43m
        1 stop
        BOS 10:31
        Seattle - Boston | Mon, Nov 2 | American Airlines
        CAD 238
        15% off
        CAD 280 CAD 238
      • SEA 22:48
        8h 43m
        1 stop
        BOS 10:31
        Seattle - Boston | Thu, Oct 29 | American Airlines
        CAD 238
        15% off
        CAD 280 CAD 238
      • SEA 13:00
        17h 25m
        1 stop
        BOS 14:00
        Seattle - Boston | Mon, Oct 12 | Normal Airline
        Find more flights
        Find more flights

Flight fares from Seattle-Tacoma International Airport to Boston Logan International Airport are based on average airline prices for the next 3 months, according to Trip.com’s latest data.

Trip.com Price Insights: Flights from Seattle-Tacoma International Airport to Boston Logan International Airport

What is the cheapest month to fly from Seattle-Tacoma International Airport to Boston Logan International Airport?

The data is based on the past 12 months and shows the average one-way ticket prices from Seattle-Tacoma International Airport to Boston Logan International Airport for each month in the Trip.com database.

Based on Trip.com's data from the past 12 months, the cheapest one-way flights from Seattle-Tacoma International Airport to Boston Logan International Airport are usually in April, with an average price of CAD 309. It is best to avoid January, when the average price can reach CAD 500.

CAD 500
CAD 405
CAD 309
CAD 214
    Cheapest
  • CAD 337
    Oct
  • CAD 347
    Nov
  • CAD 350
    Dec
  • CAD 500
    Jan
  • CAD 380
    Feb
  • CAD 355
    Mar
  • CAD 309
    Apr
  • CAD 320
    May
  • CAD 398
    Jun
  • CAD 415
    Jul
  • CAD 459
    Aug
  • CAD 395
    Sep

What is the cheapest day of the week to fly from Seattle-Tacoma International Airport to Boston Logan International Airport?

The data is based on the past 12 months and shows the average ticket prices from Seattle-Tacoma International Airport to Boston Logan International Airport for each day of the week in the Trip.com database.

Based on Trip.com's data from the past 12 months, the cheapest departure day from Seattle-Tacoma International Airport to Boston Logan International Airport is Tuesday, with average prices usually lower than other days. Avoid departing on Saturday as prices are typically highest on that day.

CAD 422
CAD 375
CAD 328
CAD 281
  • CAD 397
    Mon
  • CAD 328
    Tue
  • CAD 369
    Wed
  • CAD 401
    Thu
  • CAD 381
    Fri
  • CAD 422
    Sat
  • CAD 388
    Sun

Which airline offers the cheapest flights from Seattle-Tacoma International Airport to Boston Logan International Airport?

The cheapest airline flying from Seattle-Tacoma International Airport to Boston Logan International Airport is Frontier Airlines (from CAD 209) among 8 carriers operating this route. Based on Trip.com's latest 7-day flight data.

Frontier Airlines
From CAD 209
Alaska Airlines
From CAD 216
Delta Air Lines
From CAD 220
American Airlines
From CAD 238
Jetblue Airways
From CAD 249
Hahn Air
From CAD 272
United Airlines
From CAD 277
Sun Country Airlines
From CAD 332

Find more flights and airlines

What is the flight schedule from Seattle-Tacoma International Airport to Boston Logan International Airport?

Check the schedule for flights from Seattle to Boston and find the flight that best matches your travel plans.

Flight info.
Departure
Arrival
Weekly Schedule

  1. DL473

    Seattle-Tacoma International Airport

    22:00

    SEA

    5h 33m

    06:33

    BOS

    S M T W T F S
    Search

  2. AA2886

    Seattle-Tacoma International Airport

    22:48

    SEA

    5h 12m

    Direct

    07:00

    PHL

    S M T W T F S
    Search

  3. AA2780

    Philadelphia International Airport

    08:50

    PHL

    1h 41m

    Direct

    10:31

    BOS

    S M T W T F S

  4. AA3234

    Seattle-Tacoma International Airport

    10:31

    SEA

    4h 24m

    Direct

    16:55

    ORD

    S M T W T F S
    Search

  5. AA3107

    O'Hare International Airport

    19:08

    ORD

    2h 30m

    Direct

    22:38

    BOS

    S M T W T F S

  6. AA2379

    Seattle-Tacoma International Airport

    23:28

    SEA

    3h 57m

    Direct

    05:25

    ORD

    S M T W T F S
    Search

  7. AA802

    O'Hare International Airport

    08:30

    ORD

    2h 37m

    Direct

    12:07

    BOS

    S M T W T F S

  8. AS791

    Seattle-Tacoma International Airport

    16:54

    SEA

    2h 49m

    Direct

    19:43

    SAN

    S M T W T F S
    Search

  9. AS255

    San Diego International Airport

    20:34

    SAN

    5h 47m

    Direct

    05:21

    BOS

    S M T W T F S

  10. AA986

    Seattle-Tacoma International Airport

    08:24

    SEA

    5h 18m

    Direct

    16:42

    PHL

    S M T - T F S
    Search

  11. AA1874

    Philadelphia International Airport

    20:15

    PHL

    1h 34m

    Direct

    21:49

    BOS

    S M T W T F S

  12. AS765

    Seattle-Tacoma International Airport

    15:00

    SEA

    2h 45m

    Direct

    17:45

    SAN

    S M T W T F S
    Search

  13. AS255

    San Diego International Airport

    20:34

    SAN

    5h 47m

    Direct

    05:21

    BOS

    S M T W T F S

  14. AA3583

    Seattle-Tacoma International Airport

    06:00

    SEA

    3h 6m

    Direct

    09:06

    PHX

    S M T W T F S
    Search

  15. AA2228

    Phoenix Sky Harbor International Airport

    12:30

    PHX

    4h 59m

    Direct

    20:29

    BOS

    S M T W T F S
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About Seattle-Tacoma International Airport and Boston Logan International Airport

Learn about Seattle-Tacoma International Airport (SEA) and Boston Logan International Airport (BOS) — including location, terminals, transportation, and travel tips.

Flight distance 4,008.36km
Cheapest one-way ticket price CAD 209
Cheapest return ticket price CAD 478

FAQs for Seattle-Tacoma International Airport to Boston Logan International Airport Flights

  • How long is the flight from Seattle-Tacoma International Airport to Boston Logan International Airport?

    Seattle-Tacoma International Airport to Boston Logan International Airport takes about 4 hours 48 minutes on average. Actual flight time may vary depending on route, weather and air traffic.
  • There are around 7 daily flights from Seattle-Tacoma International Airport (SEA) to Boston Logan International Airport (BOS).
  • The earliest flight from Seattle-Tacoma International Airport to Boston Logan International Airport departs at 07:16, and the last departs at 23:42, with about 10 flights per day. Flight times may change, so please check the latest departure and arrival times before you travel.
  • The route from Seattle-Tacoma International Airport (SEA) to Boston Logan International Airport (BOS) is quite popular. Without considering departure times or holidays, tickets cost around CAD 437 in October, the most expensive month to book this route.
  • American Airlines is a very popular airline operating an average of 2138 flights per month.
  • One-way flights from Seattle-Tacoma International Airport to Boston Logan International Airport currently start from CAD 209, and round-trip fares start from CAD 478. The current lowest fare is a Frontier Airlines flight departing on Wed, Nov 11; prices may vary depending on availability.
  • Yes. Alaska Airlines, Delta Air Lines and Jetblue Airways operate direct flights from Seattle-Tacoma International Airport to Boston Logan International Airport, with an average flight time of 4 hours 35 minutes, and around 61 weekly flights. Actual flight frequency may vary by season.
  • Based on Trip.com flight data for departures within the next 30 days with at most one stop, the average one-way price from Seattle-Tacoma International Airport to Boston Logan International Airport is CAD 358. Prices may vary depending on the departure date, airline, and availability.
  • Jetblue Airways and Condor are the most popular budget airlines flying from Seattle-Tacoma International Airport to Boston Logan International Airport, with one-way fares starting from CAD 209. Compare final prices carefully, as baggage, seat selection and payment fees may apply.
  • Seattle-Tacoma International Airport to Boston Logan International Airport operates around 62 weekly flights, mainly by Alaska Airlines, Delta Air Lines and Jetblue Airways. Actual frequency may vary during holidays and seasonal schedule adjustments.
  • Enter Seattle-Tacoma International Airport and Boston Logan International Airport, select your departure date and number of passengers, then compare flights by price, flight duration, and baggage allowance. Once you've chosen a fare, review the change and refund rules, fill in passenger details, and pay to receive your booking confirmation.

Find Cheap Flights with Trip.com

Note: Prices shown on this page are estimated lowest price and include all taxes and fees found in the last 24 hours.

Book with no extra fees

Prices displayed on this page are all-inclusive prices (incl. taxes, fuel surcharge, civil aviation development fund, etc) with all fees confirmed before payment. Fees for luggage, meals, Wi-Fi, or other additional services are also included as shown in the flight cards.

Real-time pricing updates

Prices, availability, and travel information on this page were updated within the last 24 hours—even in real-time. The more popular the route, the more precise the data.

Change & Cancellation Policy

Trip.com displays flight cancellation and change policies for each flight ticket during the booking process, including fees and applicable conditions. Please check the following scenarios:
Voluntary cancellation/change:
To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy.
Cancellation/change due to a flight schedule change:
If the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.