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Boston Logan International Airport to Seattle-Tacoma International Airport flight

Explore the cheapest one-way and round-trip flights from Boston Logan International Airport to Seattle-Tacoma International Airport over the next 90 days, with one-way fares from €130 and round-trip from €288. Based on Trip.com's latest 7-day flight data.

    • Cheapest nonstop
      BOS 18:22
      6h 38m
      Direct
      SEA 22:00
      Boston - Seattle | Mon, Dec 7 | Alaska Airlines
      SEA 15:40
      5h 19m
      Direct
      BOS 23:59
      Seattle - Boston | Wed, Dec 9 | Alaska Airlines
      €315 €402
      22% off
      22% off
      €402 €315
    • BOS 10:40
      6h 23m
      Direct
      SEA 14:03
      Boston - Seattle | Wed, Nov 25 | Delta Air Lines
      SEA 15:40
      5h 19m
      Direct
      BOS 23:59
      Seattle - Boston | Tue, Dec 1 | Alaska Airlines
      €321 €402
      20% off
      20% off
      €402 €321
    • BOS 19:25
      6h 30m
      Direct
      SEA 22:55
      Boston - Seattle | Fri, Nov 20 | Delta Air Lines
      SEA 08:40
      5h 21m
      Direct
      BOS 17:01
      Seattle - Boston | Fri, Nov 27 | Alaska Airlines
      €321 €402
      20% off
      20% off
      €402 €321
    • BOS 10:40
      6h 29m
      Direct
      SEA 14:09
      Boston - Seattle | Mon, Dec 7 | Delta Air Lines
      SEA 09:00
      5h 19m
      Direct
      BOS 17:19
      Seattle - Boston | Wed, Dec 9 | Alaska Airlines
      €321
      20% off
      €402 €321
    • BOS 18:13
      30h 44m
      1 stop
      SEA 21:57
      Boston - Seattle | Mon, Dec 14 | Alaska Airlines
      SEA 10:35
      15h 53m
      1 stop
      BOS 05:28
      Seattle - Boston | Wed, Dec 16 | Alaska Airlines
      €288
      28% off
      €402 €288
    • BOS 17:44
      6h 24m
      Direct
      SEA 21:08
      Boston - Seattle | Tue, Nov 10 | Alaska Airlines
      SEA 06:10
      7h 40m
      1 stop
      BOS 16:50
      Seattle - Boston | Tue, Nov 17 |
      €296
      26% off
      €402 €296
    • BOS 07:50
      6h 27m
      Direct
      SEA 11:17
      Boston - Seattle | Tue, Nov 10 | Delta Air Lines
      SEA 07:00
      9h 50m
      1 stop
      BOS 19:50
      Seattle - Boston | Tue, Nov 17 |
      €299
      26% off
      €402 €299
    • BOS 07:03
      10h 42m
      1 stop
      SEA 14:45
      Boston - Seattle | Fri, Nov 13 | Alaska Airlines
      SEA 17:19
      9h 27m
      1 stop
      BOS 05:46
      Seattle - Boston | Mon, Nov 16 | Alaska Airlines
      €304
      24% off
      €402 €304
    • BOS 07:51
      13h 11m
      1 stop
      SEA 18:02
      Boston - Seattle | Thu, Oct 29 | Alaska Airlines
      SEA 17:19
      9h 27m
      1 stop
      BOS 05:46
      Seattle - Boston | Mon, Nov 2 | Alaska Airlines
      €304
      24% off
      €402 €304
    • BOS 13:00
      17h 25m
      1 stop
      SEA 14:00
      Boston - Seattle | Thu, Oct 29 | Normal Airline
      SEA 15:00
      6h
      Direct
      BOS 16:00
      Seattle - Boston | Sat, Oct 31 | Normal Airline
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    • Cheapest
      BOS 06:00
      11h 52m
      1 stop
      SEA 14:52
      Boston - Seattle | Wed, Nov 11 | American Airlines
      €130 €195
      33% off
      33% off
      €195 €130
    • BOS 18:32
      6h 26m
      Direct
      SEA 21:58
      Boston - Seattle | Sat, Nov 28 | Alaska Airlines
      €137 €195
      30% off
      30% off
      €195 €137
    • BOS 18:30
      6h 34m
      Direct
      SEA 22:04
      Boston - Seattle | Sat, Nov 28 | Delta Air Lines
      €139 €195
      28% off
      28% off
      €195 €139
    • BOS 07:00
      6h 20m
      Direct
      SEA 10:20
      Boston - Seattle | Wed, Nov 11 | Alaska Airlines
      €145
      26% off
      €195 €145
    • BOS 18:30
      6h 34m
      Direct
      SEA 22:04
      Boston - Seattle | Wed, Nov 11 | Delta Air Lines
      €147
      25% off
      €195 €147
    • BOS 19:20
      6h 22m
      Direct
      SEA 22:42
      Boston - Seattle | Tue, Nov 10 | Jetblue Airways
      €154
      21% off
      €195 €154
    • BOS 07:03
      10h 42m
      1 stop
      SEA 14:45
      Boston - Seattle | Mon, Nov 23 | Alaska Airlines
      €156
      20% off
      €195 €156
    • BOS 15:45
      6h 21m
      Direct
      SEA 19:06
      Boston - Seattle | Mon, Nov 16 | Delta Air Lines
      €164
      79% off
      €789 €164
    • BOS 07:13
      6h 26m
      Direct
      SEA 10:39
      Boston - Seattle | Sun, Nov 8 | Alaska Airlines
      €189
      50% off
      €378 €189
    • BOS 13:00
      17h 25m
      1 stop
      SEA 14:00
      Boston - Seattle | Thu, Oct 29 | Normal Airline
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    • Cheapest nonstop
      BOS 18:32
      6h 26m
      Direct
      SEA 21:58
      Boston - Seattle | Sat, Nov 28 | Alaska Airlines
      €137 €195
      30% off
      30% off
      €195 €137
    • BOS 18:30
      6h 34m
      Direct
      SEA 22:04
      Boston - Seattle | Sat, Nov 28 | Delta Air Lines
      €139 €195
      28% off
      28% off
      €195 €139
    • BOS 07:00
      6h 20m
      Direct
      SEA 10:20
      Boston - Seattle | Wed, Nov 11 | Alaska Airlines
      €145 €195
      26% off
      26% off
      €195 €145
    • BOS 18:30
      6h 34m
      Direct
      SEA 22:04
      Boston - Seattle | Wed, Nov 11 | Delta Air Lines
      €147
      25% off
      €195 €147
    • BOS 19:20
      6h 22m
      Direct
      SEA 22:42
      Boston - Seattle | Tue, Nov 10 | Jetblue Airways
      €154
      21% off
      €195 €154
    • BOS 15:45
      6h 21m
      Direct
      SEA 19:06
      Boston - Seattle | Mon, Nov 16 | Delta Air Lines
      €164
      79% off
      €789 €164
    • BOS 07:13
      6h 26m
      Direct
      SEA 10:39
      Boston - Seattle | Sun, Nov 8 | Alaska Airlines
      €189
      50% off
      €378 €189
    • BOS 07:00
      6h 28m
      Direct
      SEA 10:28
      Boston - Seattle | Sat, Nov 21 | Alaska Airlines
      €193
      49% off
      €378 €193
    • BOS 18:22
      6h 38m
      Direct
      SEA 22:00
      Boston - Seattle | Mon, Dec 7 | Alaska Airlines
      €196
      48% off
      €378 €196
    • BOS 13:00
      17h 25m
      1 stop
      SEA 14:00
      Boston - Seattle | Thu, Oct 29 | Normal Airline
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    • Cheapest nonstop
      BOS 07:13
      6h 26m
      Direct
      SEA 10:39
      Boston - Seattle | Sun, Nov 8 | Alaska Airlines
      €189 €468
      60% off
      60% off
      €468 €189
    • BOS 07:00
      6h 28m
      Direct
      SEA 10:28
      Boston - Seattle | Sat, Nov 21 | Alaska Airlines
      €193 €468
      59% off
      59% off
      €468 €193
    • BOS 18:22
      6h 38m
      Direct
      SEA 22:00
      Boston - Seattle | Mon, Dec 7 | Alaska Airlines
      €196 €468
      57% off
      57% off
      €468 €196
    • BOS 07:00
      6h 38m
      Direct
      SEA 10:38
      Boston - Seattle | Sun, Jan 3 | Alaska Airlines
      €197
      57% off
      €468 €197
    • BOS 18:28
      6h 28m
      Direct
      SEA 21:56
      Boston - Seattle | Thu, Jan 7 | Alaska Airlines
      €197
      57% off
      €468 €197
    • BOS 18:22
      6h 38m
      Direct
      SEA 22:00
      Boston - Seattle | Thu, Dec 3 | Alaska Airlines
      €199
      56% off
      €468 €199
    • BOS 18:22
      6h 38m
      Direct
      SEA 22:00
      Boston - Seattle | Wed, Dec 2 | Alaska Airlines
      €204
      56% off
      €468 €204
    • BOS 17:55
      6h 25m
      Direct
      SEA 21:20
      Boston - Seattle | Wed, Nov 4 | Delta Air Lines
      €209
      55% off
      €468 €209
    • BOS 18:20
      6h 24m
      Direct
      SEA 21:44
      Boston - Seattle | Mon, Nov 9 | Alaska Airlines
      €210
      55% off
      €468 €210
    • BOS 13:00
      17h 25m
      1 stop
      SEA 14:00
      Boston - Seattle | Thu, Oct 29 | Normal Airline
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    • Cheapest nonstop
      BOS 11:15
      6h 20m
      Direct
      SEA 14:35
      Boston - Seattle | Sat, Oct 31 | Delta Air Lines
      €202 €564
      64% off
      64% off
      €564 €202
    • BOS 16:58
      6h 19m
      Direct
      SEA 20:17
      Boston - Seattle | Sat, Oct 31 | Alaska Airlines
      €204 €564
      64% off
      64% off
      €564 €204
    • BOS 07:13
      6h 26m
      Direct
      SEA 10:39
      Boston - Seattle | Sun, Nov 1 | Alaska Airlines
      €233 €564
      59% off
      59% off
      €564 €233
    • BOS 07:55
      6h 25m
      Direct
      SEA 11:20
      Boston - Seattle | Mon, Nov 2 | Delta Air Lines
      €247
      56% off
      €564 €247
    • BOS 07:55
      6h 25m
      Direct
      SEA 11:20
      Boston - Seattle | Sun, Nov 1 | Delta Air Lines
      €263
      53% off
      €564 €263
    • BOS 16:58
      6h 19m
      Direct
      SEA 20:17
      Boston - Seattle | Thu, Oct 29 | Alaska Airlines
      €270
      52% off
      €564 €270
    • BOS 16:58
      6h 19m
      Direct
      SEA 20:17
      Boston - Seattle | Wed, Oct 28 | Alaska Airlines
      €270
      52% off
      €564 €270
    • BOS 09:03
      6h 24m
      Direct
      SEA 12:27
      Boston - Seattle | Tue, Nov 3 | Alaska Airlines
      €360
      36% off
      €564 €360
    • BOS 16:58
      6h 19m
      Direct
      SEA 20:17
      Boston - Seattle | Fri, Oct 30 | Alaska Airlines
      €377
      33% off
      €564 €377
    • BOS 13:00
      17h 25m
      1 stop
      SEA 14:00
      Boston - Seattle | Thu, Oct 29 | Normal Airline
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    • BOS 09:03
      6h 17m
      Direct
      SEA 12:20
      Boston - Seattle | Sat, Oct 31 | Alaska Airlines
      €204 €789
      74% off
      74% off
      €789 €204
    • BOS 15:47
      6h 18m
      Direct
      SEA 19:05
      Boston - Seattle | Sun, Nov 8 | Delta Air Lines
      €311 €789
      61% off
      61% off
      €789 €311
    • BOS 07:00
      6h 20m
      Direct
      SEA 10:20
      Boston - Seattle | Wed, Nov 11 | Alaska Airlines
      €145 €195
      26% off
      26% off
      €195 €145
    • BOS 15:45
      6h 21m
      Direct
      SEA 19:06
      Boston - Seattle | Mon, Nov 16 | Delta Air Lines
      €164
      79% off
      €789 €164
    • BOS 15:45
      6h 21m
      Direct
      SEA 19:06
      Boston - Seattle | Fri, Nov 20 | Delta Air Lines
      €198
      75% off
      €789 €198
    • BOS 15:45
      6h 21m
      Direct
      SEA 19:06
      Boston - Seattle | Tue, Nov 17 | Delta Air Lines
      €205
      74% off
      €789 €205
    • BOS 15:45
      6h 21m
      Direct
      SEA 19:06
      Boston - Seattle | Wed, Nov 11 | Delta Air Lines
      €206
      74% off
      €789 €206
    • BOS 15:45
      6h 21m
      Direct
      SEA 19:06
      Boston - Seattle | Thu, Nov 12 | Delta Air Lines
      €211
      73% off
      €789 €211
    • BOS 15:45
      6h 21m
      Direct
      SEA 19:06
      Boston - Seattle | Tue, Nov 10 | Delta Air Lines
      €214
      73% off
      €789 €214
    • BOS 13:00
      17h 25m
      1 stop
      SEA 14:00
      Boston - Seattle | Thu, Oct 29 | Normal Airline
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Displayed flight fares from Boston to Seattle are based on average prices across airlines for the next 3 months, according to the latest Trip.com database.

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

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

The data is based on the past 12 months and shows the average one-way ticket prices from Boston Logan International Airport to Seattle-Tacoma 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 Boston Logan International Airport to Seattle-Tacoma International Airport are usually in March, with an average price of €203. It is best to avoid December, when the average price can reach €332.

€332
€268
€203
€139
    Cheapest
  • €233
    Oct
  • €246
    Nov
  • €332
    Dec
  • €285
    Jan
  • €273
    Feb
  • €203
    Mar
  • €249
    Apr
  • €225
    May
  • €256
    Jun
  • €254
    Jul
  • €277
    Aug
  • €248
    Sep

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

The data is based on the past 12 months and shows the average ticket prices from Boston Logan International Airport to Seattle-Tacoma 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 Boston Logan International Airport to Seattle-Tacoma International Airport is Wednesday, with average prices usually lower than other days. Avoid departing on Sunday as prices are typically highest on that day.

€285
€247
€209
€171
    Cheapest
  • €254
    Mon
  • €227
    Tue
  • €209
    Wed
  • €270
    Thu
  • €271
    Fri
  • €255
    Sat
  • €285
    Sun

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

The cheapest airline flying from Boston Logan International Airport to Seattle-Tacoma International Airport is United Airlines (from €149) among 6 carriers operating this route. Based on Trip.com's latest 7-day flight data.

United Airlines
From €149
Alaska Airlines
From €149
American Airlines
From €160
Delta Air Lines
From €163
Hahn Air
From €188
Sun Country Airlines
From €204

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

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

Flight info.
Departure
Arrival
Weekly Schedule

  1. DL332

    Boston Logan International Airport

    21:40

    BOS

    5h 58m

    00:38

    SEA

    S M T W T F S
    Search

  2. AS257

    Boston Logan International Airport

    17:44

    BOS

    6h 24m

    21:08

    SEA

    S - - - - - S
    Search

  3. AS459

    Boston Logan International Airport

    07:00

    BOS

    6h 38m

    10:38

    SEA

    S M T W T F S
    Search

  4. DL384

    Boston Logan International Airport

    07:35

    BOS

    6h 29m

    11:04

    SEA

    S M T W T F S
    Search

  5. DL1103

    Boston Logan International Airport

    11:29

    BOS

    3h 26m

    Direct

    13:55

    MSP

    S M T W T F S
    Search

  6. DL877

    Minneapolis-Saint Paul International Airport

    14:59

    MSP

    3h 47m

    Direct

    16:46

    SEA

    S M T W T F S

  7. AA690

    Boston Logan International Airport

    06:00

    BOS

    1h 37m

    Direct

    07:37

    PHL

    S - - - - - S
    Search

  8. AA2203

    Philadelphia International Airport

    08:10

    PHL

    6h 35m

    Direct

    11:45

    SEA

    S - - - - - S

  9. AS358

    Boston Logan International Airport

    16:46

    BOS

    6h 41m

    Direct

    20:27

    PDX

    S - - - - - S
    Search

  10. AS1432

    Portland International Airport

    21:59

    PDX

    1h 1m

    Direct

    23:00

    SEA

    S - - - - - S

  11. AA547

    Boston Logan International Airport

    13:25

    BOS

    3h 4m

    Direct

    15:29

    ORD

    - M T W T F -
    Search

  12. AA3105

    O'Hare International Airport

    07:17

    ORD

    4h 52m

    Direct

    10:09

    SEA

    - M T W T F -

  13. AA4629

    Boston Logan International Airport

    11:17

    BOS

    1h 44m

    Direct

    13:01

    PHL

    S - - - - - S
    Search

  14. AA2500

    Philadelphia International Airport

    18:42

    PHL

    6h 29m

    Direct

    22:11

    SEA

    S - - - - - S

  15. AA947

    Boston Logan International Airport

    05:51

    BOS

    3h 13m

    Direct

    08:04

    ORD

    S - - - - - S
    Search

  16. AA2398

    O'Hare International Airport

    06:45

    ORD

    4h 53m

    Direct

    09:38

    SEA

    S - - - - - S
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About Boston Logan International Airport and Seattle-Tacoma International Airport

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

Flight distance 4,008.36km
Cheapest one-way ticket price €130
Cheapest return ticket price €288

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

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

    Boston Logan International Airport to Seattle-Tacoma International Airport takes about 5 hours 55 minutes on average. Actual flight time may vary depending on route, weather and air traffic.
  • There are around 7 daily flights from Boston Logan International Airport (BOS) to Seattle-Tacoma International Airport (SEA).
  • The earliest flight from Boston Logan International Airport to Seattle-Tacoma International Airport departs at 07:03, and the last departs at 23:20, 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 Boston Logan International Airport (BOS) to Seattle-Tacoma International Airport (SEA) is quite popular. Without considering departure times or holidays, tickets cost around €320 in November, the most expensive month to book this route.
    • The distance from Seattle-Tacoma International Airport to downtown is about 17km, by taxi about 30 minutes.
  • United Airlines is a very popular airline operating an average of 2444 flights per month.
  • One-way flights from Boston Logan International Airport to Seattle-Tacoma International Airport currently start from €130, and round-trip fares start from €288. The current lowest fare is a American Airlines flight departing on Wed, Nov 11; prices may vary depending on availability.
  • Yes. Alaska Airlines, Delta Air Lines, Jetblue Airways and United Airlines operate direct flights from Boston Logan International Airport to Seattle-Tacoma International Airport, with an average flight time of 6 hours 39 minutes, and around 69 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 Boston Logan International Airport to Seattle-Tacoma International Airport is €242. Prices may vary depending on the departure date, airline, and availability.
  • Condor and Jetblue Airways are the most popular budget airlines flying from Boston Logan International Airport to Seattle-Tacoma International Airport, with one-way fares starting from €130. Compare final prices carefully, as baggage, seat selection and payment fees may apply.
  • Boston Logan International Airport to Seattle-Tacoma International Airport operates around 68 weekly flights, mainly by Alaska Airlines, Delta Air Lines and Jetblue Airways. Actual frequency may vary during holidays and seasonal schedule adjustments.
  • Enter Boston Logan International Airport and Seattle-Tacoma 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.

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

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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.