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Baltimore/Washington International Airport to Seattle Tacoma Intl. Airport flight

Explore the cheapest one-way and round-trip flights from Baltimore/Washington International Airport to Seattle Tacoma Intl. Airport over the next 90 days, with one-way fares from £69 and round-trip from £207. Based on Trip.com's latest 7-day flight data.

      • Cheapest nonstop
        BWI 6:15 PM
        5h 45m
        Nonstop
        SEA 9:00 PM
        Baltimore - Seattle | Fri, Oct 30 | Alaska Airlines
        SEA 9:08 AM
        5h 4m
        Nonstop
        BWI 5:12 PM
        Seattle - Baltimore | Tue, Nov 3 | Alaska Airlines
        £243 £318
        24% off
        24% off
        £318 £243
      • BWI 7:50 AM
        5h 39m
        Nonstop
        SEA 10:29 AM
        Baltimore - Seattle | Sat, Sep 26 | Alaska Airlines
        SEA 12:10 AM
        9h 35m
        1 stop
        BWI 12:45 PM
        Seattle - Baltimore | Sat, Oct 3 |
        £207 £318
        35% off
        35% off
        £318 £207
      • BWI 6:20 AM
        8h 58m
        1 stop
        SEA 12:18 PM
        Baltimore - Seattle | Wed, Oct 14 | American Airlines
        SEA 12:56 PM
        7h 14m
        1 stop
        BWI 11:10 PM
        Seattle - Baltimore | Tue, Oct 20 | American Airlines
        £233 £318
        27% off
        27% off
        £318 £233
      • BWI 6:33 PM
        9h 2m
        1 stop
        SEA 12:35 AM
        Baltimore - Seattle | Sat, Nov 7 | American Airlines
        SEA 12:25 AM
        7h 36m
        1 stop
        BWI 11:01 AM
        Seattle - Baltimore | Tue, Nov 10 | American Airlines
        £233
        27% off
        £318 £233
      • BWI 4:04 PM
        8h 53m
        1 stop
        SEA 9:57 PM
        Baltimore - Seattle | Sat, Oct 31 | American Airlines
        SEA 12:25 AM
        7h 36m
        1 stop
        BWI 11:01 AM
        Seattle - Baltimore | Tue, Nov 3 | American Airlines
        £233
        27% off
        £318 £233
      • BWI 6:20 AM
        8h 58m
        1 stop
        SEA 12:18 PM
        Baltimore - Seattle | Sat, Oct 24 | American Airlines
        SEA 12:56 PM
        7h 14m
        1 stop
        BWI 11:10 PM
        Seattle - Baltimore | Tue, Oct 27 | American Airlines
        £233
        27% off
        £318 £233
      • BWI 12:00 PM
        10h 4m
        1 stop
        SEA 7:04 PM
        Baltimore - Seattle | Tue, Oct 20 | Delta Air Lines
        SEA 6:00 AM
        8h 27m
        1 stop
        BWI 5:27 PM
        Seattle - Baltimore | Sat, Oct 24 | Delta Air Lines
        £248
        22% off
        £318 £248
      • BWI 5:36 PM
        7h 29m
        1 stop
        SEA 10:05 PM
        Baltimore - Seattle | Sat, Oct 24 | Delta Air Lines
        SEA 6:00 AM
        8h 27m
        1 stop
        BWI 5:27 PM
        Seattle - Baltimore | Tue, Oct 27 | Delta Air Lines
        £248
        22% off
        £318 £248
      • BWI 5:00 AM
        8h 3m
        1 stop
        SEA 10:03 AM
        Baltimore - Seattle | Thu, Nov 5 | American Airlines
        SEA 5:10 AM
        7h 44m
        1 stop
        BWI 3:54 PM
        Seattle - Baltimore | Tue, Nov 10 | American Airlines
        £250
        21% off
        £318 £250
      • BWI 5:00 AM
        7h 58m
        1 stop
        SEA 9:58 AM
        Baltimore - Seattle | Mon, Oct 19 | American Airlines
        SEA 6:00 AM
        7h 53m
        1 stop
        BWI 4:53 PM
        Seattle - Baltimore | Sat, Oct 24 | American Airlines
        £250
        21% off
        £318 £250
      • BWI 5:29 PM
        8h 27m
        1 stop
        SEA 10:56 PM
        Baltimore - Seattle | Sat, Sep 26 | United Airlines
        SEA 12:10 AM
        9h 35m
        1 stop
        BWI 12:45 PM
        Seattle - Baltimore | Sat, Oct 3 |
        £254
        20% off
        £318 £254
      • BWI 1:00 PM
        17h 25m
        1 stop
        SEA 2:00 PM
        Baltimore - Seattle | Thu, Sep 24 | Normal Airline
        SEA 3:00 PM
        6h
        Nonstop
        BWI 4:00 PM
        Seattle - Baltimore | Sat, Sep 26 | Normal Airline
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      • Cheapest nonstop
        BWI 6:15 PM
        5h 45m
        Nonstop
        SEA 9:00 PM
        Baltimore - Seattle | Tue, Nov 10 | Alaska Airlines
        £104 £182
        43% off
        43% off
        £182 £104
      • BWI 7:02 AM
        5h 44m
        Nonstop
        SEA 9:46 AM
        Baltimore - Seattle | Thu, Nov 12 | Alaska Airlines
        £145 £182
        20% off
        20% off
        £182 £145
      • BWI 2:10 PM
        10h 53m
        1 stop
        SEA 10:03 PM
        Baltimore - Seattle | Tue, Oct 27 | Delta Air Lines
        £69 £182
        62% off
        62% off
        £182 £69
      • BWI 7:00 AM
        10h 50m
        1 stop
        SEA 2:50 PM
        Baltimore - Seattle | Tue, Nov 10 | Delta Air Lines
        £109
        40% off
        £182 £109
      • BWI 7:00 AM
        10h 52m
        1 stop
        SEA 2:52 PM
        Baltimore - Seattle | Tue, Nov 10 | American Airlines
        £113
        38% off
        £182 £113
      • BWI 8:05 AM
        9h 17m
        1 stop
        SEA 2:22 PM
        Baltimore - Seattle | Tue, Oct 27 | United Airlines
        £135
        26% off
        £182 £135
      • BWI 5:48 PM
        8h 22m
        1 stop
        SEA 11:10 PM
        Baltimore - Seattle | Tue, Oct 27 | American Airlines
        £136
        25% off
        £182 £136
      • BWI 12:34 PM
        9h 29m
        1 stop
        SEA 7:03 PM
        Baltimore - Seattle | Tue, Nov 10 | United Airlines
        £144
        21% off
        £182 £144
      • BWI 5:40 AM
        30h 50m
        1 stop
        SEA 9:30 AM
        Baltimore - Seattle | Sun, Oct 25 | Frontier Airlines
        £145
        20% off
        £182 £145
      • BWI 9:25 PM
        15h 5m
        1 stop
        SEA 9:30 AM
        Baltimore - Seattle | Sun, Oct 18 | Frontier Airlines
        £145
        20% off
        £182 £145
      • BWI 1:00 PM
        17h 25m
        1 stop
        SEA 2:00 PM
        Baltimore - Seattle | Thu, Sep 24 | Normal Airline
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Displayed flight fares from Baltimore/Washington International Airport to Seattle Tacoma Intl. Airport 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 Baltimore/Washington International Airport to Seattle Tacoma Intl. Airport

What is the cheapest month for one-way flights from Baltimore/Washington International Airport to Seattle Tacoma Intl. Airport?

Data is based on average one-way flight prices from Baltimore/Washington International Airport to Seattle Tacoma Intl. Airport in Trip.com's database over the past 12 months.

Based on Trip.com’s data from the past 12 months, if you’re looking for a low-cost one-way ticket from Baltimore/Washington International Airport to Seattle Tacoma Intl. Airport, the best time to buy is in September, with an average price of £1. You’ll want to avoid December, when the average price can reach as high as £366.

£366
£184
£1
0
  • £1
    Sep
  • £186
    Oct
  • £155
    Nov
  • £366
    Dec
  • £220
    Jan
  • £128
    Feb
  • £290
    Mar
  • £136
    Apr
  • £280
    May
  • £242
    Jun
  • £229
    Jul
  • £190
    Aug

What is the cheapest day of the week to fly from Baltimore/Washington International Airport to Seattle Tacoma Intl. Airport?

The data is based on the past 12 months and shows the average ticket prices from Baltimore/Washington International Airport to Seattle Tacoma Intl. 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 day to depart from Baltimore/Washington International Airport to Seattle Tacoma Intl. Airport is Tuesday, with average fares typically lower than other days. You’ll want to avoid flying on Sunday, as ticket prices are usually the highest that day.

£350
£235
£119
£4
  • £144
    Mon
  • £119
    Tue
  • £277
    Wed
  • £178
    Thu
  • £205
    Fri
  • £319
    Sat
  • £350
    Sun

Which airline offers the cheapest flights from Baltimore/Washington International Airport to Seattle Tacoma Intl. Airport?

The cheapest airline flying from Baltimore/Washington International Airport to Seattle Tacoma Intl. Airport is Delta Air Lines (from £69) among 6 carriers operating this route. Based on Trip.com's latest 7-day flight data.

Delta Air Lines
From £69
Frontier Airlines
From £94
Alaska Airlines
From £104
American Airlines
From £113
United Airlines
From £135
Sun Country Airlines
From £161

Find more flights and airlines

What is the flight schedule from Baltimore/Washington International Airport to Seattle Tacoma Intl. Airport?

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

Flight info.
Departure
Arrival
Weekly Schedule

  1. AS786

    Baltimore/Washington International Airport

    7:50 AM

    BWI

    5h 39m

    10:29 AM

    SEA

    S M T W T F S
    Search

  2. AS379

    Baltimore/Washington International Airport

    7:15 PM

    BWI

    5h 42m

    9:57 PM

    SEA

    S M T W T F S
    Search

  3. DL2565

    Baltimore/Washington International Airport

    7:15 PM

    BWI

    2h 45m

    Nonstop

    9:00 PM

    MSP

    S M T W T - S
    Search

  4. DL505

    Minneapolis-Saint Paul International Airport

    9:50 PM

    MSP

    4h 3m

    Nonstop

    11:53 PM

    SEA

    S M T W T - S

  5. DL2601

    Baltimore/Washington International Airport

    6:00 AM

    BWI

    1h 44m

    Nonstop

    7:44 AM

    DTW

    S M T W T F S
    Search

  6. DL734

    Detroit Metropolitan Wayne County Airport

    8:25 AM

    DTW

    5h 17m

    Nonstop

    10:42 AM

    SEA

    S M T W T F S

  7. AA1708

    Baltimore/Washington International Airport

    6:20 AM

    BWI

    1h 30m

    Nonstop

    7:50 AM

    CLT

    S M T W T F S
    Search

  8. AA1833

    Charlotte Douglas International Airport

    3:16 PM

    CLT

    5h 47m

    Nonstop

    6:03 PM

    SEA

    S - T W T F -

  9. AA3762

    Baltimore/Washington International Airport

    11:23 AM

    BWI

    2h 17m

    Nonstop

    12:40 PM

    ORD

    S M T W T F S
    Search

  10. AA2392

    O'Hare Intl. Airport

    6:40 PM

    ORD

    4h 56m

    Nonstop

    9:36 PM

    SEA

    S M T W T F S

  11. DL2799

    Baltimore/Washington International Airport

    4:39 PM

    BWI

    2h 3m

    Nonstop

    6:42 PM

    ATL

    S M T W T F S
    Search

  12. DL903

    Hartsfield–Jackson Atlanta International Airport

    9:35 PM

    ATL

    5h 34m

    Nonstop

    12:09 AM

    SEA

    S M T W T F S

  13. DL1176

    Baltimore/Washington International Airport

    7:10 AM

    BWI

    5h 1m

    Nonstop

    10:11 AM

    SLC

    S M T W T F S
    Search

  14. DL2921

    Salt Lake City International Airport

    1:20 PM

    SLC

    2h 23m

    Nonstop

    2:43 PM

    SEA

    S M T W T F S

  15. AA1403

    Baltimore/Washington International Airport

    7:26 AM

    BWI

    3h 24m

    Nonstop

    9:50 AM

    DFW

    S M T W T F S
    Search

  16. AA757

    Dallas Fort Worth International Airport

    12:32 PM

    DFW

    4h 19m

    Nonstop

    2:51 PM

    SEA

    S M T W T F S

  17. DL2711

    Baltimore/Washington International Airport

    2:00 PM

    BWI

    2h 1m

    Nonstop

    4:01 PM

    ATL

    S M T W T F S
    Search

  18. DL714

    Hartsfield–Jackson Atlanta International Airport

    6:10 PM

    ATL

    5h 36m

    Nonstop

    8:46 PM

    SEA

    S M T W T F S
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About Baltimore/Washington International Airport and Seattle Tacoma Intl. Airport

Learn about Baltimore/Washington International Airport (BWI) and Seattle Tacoma Intl. Airport (SEA) — including location, terminals, transportation, and travel tips.

Flight distance3,751.55 km
Cheapest one-way ticket price£69
Cheapest return ticket price£207

FAQs for Baltimore/Washington International Airport to Seattle Tacoma Intl. Airport Flights

  • How long is the flight from Baltimore/Washington International Airport to Seattle Tacoma Intl. Airport?

    Baltimore/Washington International Airport to Seattle Tacoma Intl. Airport takes about 5 hours 25 minutes on average. Actual flight time may vary depending on route, weather and air traffic.
  • There are around 2 daily flights from Baltimore/Washington International Airport (BWI) to Seattle Tacoma Intl. Airport (SEA).
  • The earliest flight from Baltimore/Washington International Airport to Seattle Tacoma Intl. Airport departs at 06:30, and the last departs at 19:15, with about 6 flights per day. Flight times may change, so please check the latest departure and arrival times before you travel.
  • The route from Baltimore/Washington International Airport (BWI) to Seattle Tacoma Intl. Airport (SEA) is quite popular. Without considering departure times or holidays, tickets cost around £275 in October, the most expensive month to book this route.
  • The earliest flight departs from Baltimore/Washington International Airport (BWI) at 07:38 and arrives in Seattle Tacoma Intl. Airport (SEA) at 10:30.
  • The latest flight departs from Baltimore/Washington International Airport (BWI) at 19:16 and arrives in Seattle Tacoma Intl. Airport (SEA) at 22:24.
    • The distance from Seattle-Tacoma International Airport to downtown is about 17 km. It takes about 30 minutes by taxi.
  • Hawaiian Airlines is a very popular airline operating an average of 185 flights per month.
  • One-way flights from Baltimore/Washington International Airport to Seattle Tacoma Intl. Airport currently start from £69, and round-trip fares start from £207. The current lowest fare is a Delta Air Lines flight departing on Tue, Oct 27; prices may vary depending on availability.
  • Yes. Alaska Airlines operate direct flights from Baltimore/Washington International Airport to Seattle Tacoma Intl. Airport, with an average flight time of 5 hours 31 minutes, and around 22 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 Baltimore/Washington International Airport to Seattle Tacoma Intl. Airport is £215. Prices may vary depending on the departure date, airline, and availability.
  • Baltimore/Washington International Airport to Seattle Tacoma Intl. Airport operates around 16 weekly flights, mainly by Alaska Airlines. Actual frequency may vary during holidays and seasonal schedule adjustments.
  • Enter Baltimore/Washington International Airport and Seattle Tacoma Intl. 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.

Book with no extra fees

Prices displayed in 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, WLAN, 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 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.