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$267+ Cheap flights from Bismarck to Seattle (BIS - SEA)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/11. Fares are subject to change and may not be available on all flights or dates of travel.
BIS — SEA
Feb 20 — Feb 271
Fri 2/20
Fri 2/27
1 adult, Economy
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Cheap flight deals from Bismarck to Seattle

Cheapest flights from Bismarck to Seattle
Explore the most affordable flight options available from Bismarck to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 21, 2026.

This United Airlines deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/45:10 pm
BIS
-
SEA
1 stop6h 05m
United Airlines
Sun 2/85:00 am
SEA
-
BIS
1 stop5h 51m
United Airlines
Deal found 1/20$309
This Delta deal was found by Cheapflights users on 1/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 1/201:28 pm
BIS
-
SEA
1 stop9h 18m
Delta
Wed 2/46:05 am
SEA
-
BIS
1 stop8h 29m
Delta
Deal found 1/19$346
This Delta deal was found by Cheapflights users on 1/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 1/261:28 pm
BIS
-
SEA
1 stop9h 18m
Delta
Tue 2/36:05 am
SEA
-
BIS
1 stop8h 29m
Delta
Deal found 1/19$354
This Delta deal was found by Cheapflights users on 1/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/227:32 am
BIS
-
SEA
1 stop9h 13m
Delta
Wed 2/46:05 am
SEA
-
BIS
1 stop8h 29m
Delta
Deal found 1/19$364
This Delta deal was found by Cheapflights users on 1/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 1/201:28 pm
BIS
-
SEA
1 stop9h 18m
Delta
Wed 1/283:35 pm
SEA
-
BIS
1 stop5h 51m
Delta
Deal found 1/19$383
This Delta deal was found by Cheapflights users on 1/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 1/205:00 am
BIS
-
SEA
1 stop9h 23m
Delta
Thu 1/293:35 pm
SEA
-
BIS
1 stop5h 51m
Delta
Deal found 1/19$391
This Delta deal was found by Cheapflights users on 1/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 1/265:00 am
BIS
-
SEA
1 stop7h 55m
Delta
Sun 2/16:05 am
SEA
-
BIS
1 stop8h 29m
Delta
Deal found 1/19$399
This United Airlines deal was found by Cheapflights users on 1/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 1/305:10 pm
BIS
-
SEA
1 stop6h 05m
United Airlines
Mon 2/25:00 am
SEA
-
BIS
1 stop5h 51m
United Airlines
Deal found 1/19$400
This Delta deal was found by Cheapflights users on 1/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/227:32 am
BIS
-
SEA
1 stop6h 51m
Delta
Sat 1/316:05 am
SEA
-
BIS
1 stop8h 29m
Delta
Deal found 1/19$401
This Delta deal was found by Cheapflights users on 1/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/227:32 am
BIS
-
SEA
1 stop9h 13m
Delta
Sun 2/16:05 am
SEA
-
BIS
1 stop8h 29m
Delta
Deal found 1/19$409

Find flight deals from Bismarck to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Bismarck (BIS) to Seattle (SEA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 21, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

Expedia
3 stars

Round-trip from

$309
(United Airlines)

One-way from

$267
(United Airlines)

Popular in

May

Cheapest in

February

Average price

$388
Provider with most accurate pricing for Bismarck-Seattle/Tacoma Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Bismarck-Seattle/Tacoma Intl flights.
Search Deals
From Bismarck to Seattle/Tacoma Intl
Search Deals
One-way flight from Bismarck to Seattle/Tacoma Intl
Search Deals
Highest demand for flights based on searches. 21% potential increase in price ($127 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($21 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Bismarck to Seattle that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 21, 2026.
Use the filters below to find and compare flights from Bismarck to Seattle that are best for you.

Fly from

Bismarck

Fly to

Seattle

Route

Depart

Return

Price

BismarckSeattle

BIS - SEA

BISSEA

Bismarck

Wed 2/4

5:10 pm-9:15 pm

1 stop6h 05m

Seattle/Tacoma Intl

Sun 2/8

5:00 am-12:51 pm

1 stop5h 51m

$309

BismarckSeattle

BIS - SEA

BISSEA

Bismarck

Mon 2/16

5:30 am-9:49 am

1 stop6h 19m

Seattle/Tacoma Intl

Mon 2/23

3:16 pm-11:43 pm

1 stop6h 27m

$391

BismarckSeattle

BIS - SEA

BISSEA

Bismarck

Wed 3/25

6:31 pm-10:59 pm

1 stop6h 28m

Seattle/Tacoma Intl

Mon 3/30

3:48 pm-11:43 pm

1 stop5h 55m

$399

BismarckSeattle

BIS - SEA

BISSEA

Bismarck

Wed 2/25

1:43 pm-11:30 pm

2 stops11h 47m

Seattle/Tacoma Intl

Wed 3/4

5:00 am-12:56 pm

1 stop5h 56m

$430

BismarckSeattle

BIS - SEA

BISSEA

Bismarck

Tue 6/2

7:31 am-12:18 pm

1 stop6h 47m

Seattle/Tacoma Intl

Sat 6/6

12:00 pm-10:48 am

2 stops20h 48m

$442

BismarckSeattle

BIS - SEA

BISSEA

Bismarck

Mon 6/1

5:07 pm-10:59 pm

1 stop7h 52m

Seattle/Tacoma Intl

Sat 6/6

5:07 am-12:48 pm

1 stop5h 41m

$460

BismarckSeattle

BIS - SEA

BISSEA

Bismarck

Sat 5/30

6:10 am-12:22 am

2 stops20h 12m

Seattle/Tacoma Intl

Fri 6/5

3:35 pm-11:14 pm

1 stop5h 39m

$468

BismarckSeattle

BIS - SEA

BISSEA

Bismarck

Wed 6/3

7:31 am-8:46 pm

2 stops15h 15m

Seattle/Tacoma Intl

Mon 6/8

2:00 pm-10:48 am

2 stops18h 48m

$491

BismarckSeattle

BIS - SEA

BISSEA

Bismarck

Sun 5/31

7:31 am-8:46 pm

2 stops15h 15m

Seattle/Tacoma Intl

Sat 6/6

2:30 pm-10:48 am

2 stops18h 18m

$496

BismarckSeattle

BIS - SEA

BISSEA

Bismarck

Mon 5/11

9:00 am-9:40 am

1 stop26h 40m

$267

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/21

Showing 1-10 of 15 results
1
2

Compare providers for flights from Bismarck to Seattle

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Bismarck to Seattle in January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Bismarck-Seattle flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Bismarck-Seattle flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Bismarck-Seattle flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Bismarck-Seattle flights, Cheapflights users trust Expedia the most. Expedia has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Bismarck-Seattle flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Bismarck to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Bismarck with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Bismarck to Seattle

What is the cheapest month to book a flight from Bismarck to Seattle?

Currently, March is the cheapest month in which you can book a flight from Bismarck to Seattle (average of $225). Flying from Bismarck to Seattle in May is currently the most expensive (average of $468). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

How much does it cost to fly round-trip from Bismarck to Seattle?

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Seattle. Reviews last updated January 21, 2026.
Read through reviews of airlines operating flights from Bismarck to Seattle, such as Delta and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,088 reviews

Boarding

8.1

Crew

8.5

Overall

7.9

Entertainment

7.8

Food

7.2

Comfort

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,088 reviews
Delta
7.9
Good
8,088 reviews

Boarding

8.1

Crew

8.5

Overall

7.9

Entertainment

7.8

Food

7.2

Comfort

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
United Airlines
7.4
Good
9,191 reviews
Delta
7.9
Good
8,088 reviews

Boarding

8.1

Crew

8.5

Overall

7.9

Entertainment

7.8

Food

7.2

Comfort

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

Related info for your journey

Find useful and relevant information for your journey from Bismarck to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Bismarck to Seattle?

    For as low as $309, United Airlines can have you in Seattle from Bismarck in 6h 05m. The distance between Bismarck and Seattle is about 1011 mi.

  • What are the cheapest airlines flying from Bismarck to Seattle round-trip?

    Delta, at $227, was found to be the cheapest airline from Bismarck to Seattle. An alternate airline flying to your destination would be United Airlines. Delta is 50% cheaper than the average price of flights available within the next 90 days to this destination.

  • Can I find deals for flights from Bismarck to Seattle that include hotel bookings?

    Yes. In addition to deals on Bismarck to Seattle flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Bismarck to Seattle?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Bismarck to Seattle.

  • Can I find deals for business class flights from Bismarck to Seattle?

    Yes. Cheapflights offers flight deals from Bismarck to Seattle by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Bismarck to Seattle?

    Currently, March is the cheapest month in which you can book a flight from Bismarck to Seattle (average of $225). Flying from Bismarck to Seattle in May is currently the most expensive (average of $468). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Tacoma
SeaTac
Lakewood
Ocean Shores
Olympia
Lynnwood
Lacey
Edmonds
Renton
Puyallup
Kirkland
Kent
Tukwila
Fife
Aberdeen
Shoreline
Marysville
Centralia
Federal Way
Chehalis

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 2 airlines flying from Bismarck to Seattle

Discover the top 2 airlines that operate flights from Bismarck to Seattle. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 21, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$227Average$283FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$286Average$532FlexibilityNo cancel feeOn-time69%

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