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$259+ Cheap flights from Bismarck to Seattle (BIS - SEA)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/10. Fares are subject to change and may not be available on all flights or dates of travel.
BIS — SEA
Nov 13 — Nov 201
Thu 11/13
Thu 11/20
1 adult, Economy
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Cheap 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 October 14, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$259
(Delta)

Popular in

May

Cheapest in

February

Average price

$441
Provider with most accurate pricing for Bismarck-Seattle/Tacoma Intl flight deals.
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Provider most trusted by Cheapflights users for Bismarck-Seattle/Tacoma Intl flights.
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From Bismarck to Seattle/Tacoma Intl
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Highest demand for flights based on searches. 15% potential increase in price ($94 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($16 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Find 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 October 14, 2025.

This Delta deal was found by Cheapflights users on 10/13. 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 11/105:35 pmBIS - SEA
1 stop8h 26mDelta
Mon 11/1711:55 pmSEA - BIS
1 stop8h 54mDelta
Deal found 10/13$259
This Delta deal was found by Cheapflights users on 10/13. 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.
Wed 10/297:30 amBIS - SEA
1 stop7h 28mDelta
Sun 11/211:55 pmSEA - BIS
1 stop8h 45mDelta
Deal found 10/13$289
This United Airlines deal was found by Cheapflights users on 10/13. 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 10/291:56 pmBIS - SEA
2 stops13h 03mUnited Airlines
Sun 11/23:48 pmSEA - BIS
1 stop5h 51mUnited Airlines
Deal found 10/13$294
This American Airlines deal was found by Cheapflights users on 10/13. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/256:23 amBIS - SEA
1 stop8h 37mAmerican Airlines
Tue 10/2812:34 amSEA - BIS
1 stop10h 23mAmerican Airlines
Deal found 10/13$316
This United Airlines deal was found by Cheapflights users on 10/13. 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.
Sat 10/256:00 amBIS - SEA
2 stops10h 24mUnited Airlines
Wed 10/291:20 pmSEA - BIS
2 stops8h 19mUnited Airlines
Deal found 10/13$326
This Delta deal was found by Cheapflights users on 10/12. 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.
Fri 10/247:30 amBIS - SEA
1 stop7h 28mDelta
Sun 10/2611:55 pmSEA - BIS
1 stop8h 45mDelta
Deal found 10/12$329
This United Airlines deal was found by Cheapflights users on 10/13. 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.
Mon 11/105:45 amBIS - SEA
2 stops9h 53mUnited Airlines
Mon 11/173:48 pmSEA - BIS
1 stop5h 51mUnited Airlines
Deal found 10/13$334
This Kiwi.com deal was found by Cheapflights users on 10/12. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/1511:29 amBIS - SEA
1 stop22h 49mMultiple Airlines
Sat 11/229:53 pmSEA - BIS
1 stop10h 48mMultiple Airlines
Deal found 10/12$346
This United Airlines deal was found by Cheapflights users on 10/13. 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.
Thu 12/41:50 pmBIS - SEA
2 stops11h 25mUnited Airlines
Mon 12/85:05 amSEA - BIS
1 stop5h 49mUnited Airlines
Deal found 10/13$365
This American Airlines deal was found by Cheapflights users on 10/13. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/156:00 amBIS - SEA
1 stop9h 10mAmerican Airlines
Fri 11/2112:59 amSEA - BIS
1 stop9h 26mAmerican Airlines
Deal found 10/13$369

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 October 14, 2025.
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

Mon 11/10

5:35 pm-12:01 am

1 stop8h 26m

Seattle/Tacoma Intl

Mon 11/17

11:55 pm-10:49 am

1 stop8h 54m

$259

BismarckSeattle

BIS - SEA

BISSEA

Bismarck

Wed 10/29

7:30 am-12:58 pm

1 stop7h 28m

Seattle/Tacoma Intl

Sun 11/2

11:55 pm-10:40 am

1 stop8h 45m

$289

BismarckSeattle

BIS - SEA

BISSEA

Bismarck

Wed 10/29

1:56 pm-12:59 am

2 stops13h 03m

Seattle/Tacoma Intl

Sun 11/2

3:48 pm-11:39 pm

1 stop5h 51m

$294

BismarckSeattle

BIS - SEA

BISSEA

Bismarck

Sat 10/25

6:23 am-1:00 pm

1 stop8h 37m

Seattle/Tacoma Intl

Wed 10/29

11:44 am-10:42 pm

1 stop8h 58m

$316

BismarckSeattle

BIS - SEA

BISSEA

Bismarck

Sat 10/25

6:00 am-2:24 pm

2 stops10h 24m

Seattle/Tacoma Intl

Wed 10/29

1:20 pm-11:39 pm

2 stops8h 19m

$326

BismarckSeattle

BIS - SEA

BISSEA

Bismarck

Fri 10/24

1:27 pm-8:46 pm

1 stop9h 19m

Seattle/Tacoma Intl

Sat 10/25

12:34 am-12:57 pm

1 stop10h 23m

$329

BismarckSeattle

BIS - SEA

BISSEA

Bismarck

Fri 10/24

7:30 am-12:58 pm

1 stop7h 28m

Seattle/Tacoma Intl

Sun 10/26

11:55 pm-10:40 am

1 stop8h 45m

$329

BismarckSeattle

BIS - SEA

BISSEA

Bismarck

Mon 11/10

5:45 am-1:38 pm

2 stops9h 53m

Seattle/Tacoma Intl

Mon 11/17

3:48 pm-11:39 pm

1 stop5h 51m

$334

BismarckSeattle

BIS - SEA

BISSEA

Bismarck

Tue 10/28

2:49 pm-9:48 pm

1 stop8h 59m

$332

BismarckSeattle

BIS - SEA

BISSEA

Bismarck

Tue 10/21

7:30 am-12:58 pm

1 stop7h 28m

$332

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/14

Showing 1-10 of 12 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 October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars

*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 FlightHub the most. FlightHub 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 $224). Flying from Bismarck to Seattle in May is currently the most expensive (average of $471). 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.

What is the cheapest time of day to fly from BIS to SEA?

Find hourly flight availability from Bismarck to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 14, 2025.

It’s optimal to fly from Bismarck to Seattle in the evening. By choosing this option you can save up to 29% on the cost of your flight, compared to a flight in the afternoon.

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 October 14, 2025.
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
8.0
Very good
7,975 reviews

Entertainment

7.9

Boarding

8.2

Overall

8.0

Food

7.3

Crew

8.5

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Delta
8.0
Very good
7,975 reviews
Delta
8.0
Very good
7,975 reviews

Entertainment

7.9

Boarding

8.2

Overall

8.0

Food

7.3

Crew

8.5

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
United Airlines
7.4
Good
8,976 reviews
Delta
8.0
Very good
7,975 reviews

Entertainment

7.9

Boarding

8.2

Overall

8.0

Food

7.3

Crew

8.5

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.

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 $259, Delta can have you in Seattle from Bismarck in 8h 26m. The distance between Bismarck and Seattle is about 1011 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • 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 54% 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 $224). Flying from Bismarck to Seattle in May is currently the most expensive (average of $471). 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
SeaTac
Tukwila
Tacoma
Lakewood
Ocean Shores
Lynnwood
Edmonds
Leavenworth
Renton
Lacey
Olympia
Kent
Federal Way
Cle Elum
Puyallup
Chehalis
Kirkland
Issaquah
Aberdeen
Shoreline

Browse thousands of different options on Cheapflights for your next trip

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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 October 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$227Average$428FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$286Average$567FlexibilityNo cancel feeOn-time69%

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