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$265+ 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 3/3. Fares are subject to change and may not be available on all flights or dates of travel.
BIS — SEA
Jan 8 — Jan 151
Thu 1/8
Thu 1/15
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 December 9, 2025.

This United Airlines deal was found by Cheapflights users on 12/7. 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 12/225:45 amBIS - SEA
1 stop6h 11mUnited Airlines
Fri 12/265:02 amSEA - BIS
1 stop6h 08mUnited Airlines
Deal found 12/7$559
This United Airlines deal was found by Cheapflights users on 12/6. 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 12/195:45 amBIS - SEA
1 stop6h 11mUnited Airlines
Fri 12/265:02 amSEA - BIS
1 stop6h 08mUnited Airlines
Deal found 12/6$564
This United Airlines deal was found by Cheapflights users on 12/6. 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.
Sun 12/215:10 pmBIS - SEA
1 stop8h 02mUnited Airlines
Sat 12/275:02 amSEA - BIS
1 stop6h 08mUnited Airlines
Deal found 12/6$590
This United Airlines deal was found by Cheapflights users on 12/7. 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 12/175:45 amBIS - SEA
1 stop6h 25mUnited Airlines
Tue 12/233:50 pmSEA - BIS
1 stop26h 26mUnited Airlines
Deal found 12/7$644
This Kiwi.com deal was found by Cheapflights users on 12/6. 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.
Fri 12/197:19 pmBIS - SEA
1 stop23h 58mMultiple Airlines
Fri 12/261:25 pmSEA - BIS
2 stops19h 39mMultiple Airlines
Deal found 12/6$663
This United Airlines deal was found by Cheapflights users on 12/6. 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.
Sun 12/215:10 pmBIS - SEA
1 stop8h 02mUnited Airlines
Thu 12/251:55 pmSEA - BIS
1 stop7h 57mUnited Airlines
Deal found 12/6$695
This United Airlines deal was found by Cheapflights users on 12/7. 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 12/195:45 amBIS - SEA
1 stop6h 11mUnited Airlines
Sun 12/213:50 pmSEA - BIS
1 stop6h 02mUnited Airlines
Deal found 12/7$781

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 December 9, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$265
(Delta)

Popular in

May

Cheapest in

February

Average price

$532
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
Highest demand for flights based on searches. 22% potential increase in price ($136 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($19 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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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 December 9, 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

Tue 3/3

1:28 pm-8:46 pm

1 stop9h 18m

Seattle/Tacoma Intl

Mon 3/9

11:59 pm-10:27 am

1 stop8h 28m

$265

BismarckSeattle

BIS - SEA

BISSEA

Bismarck

Sat 1/3

10:15 pm-5:38 pm

2 stops45h 23m

Seattle/Tacoma Intl

Sat 1/10

6:34 pm-10:56 am

1 stop14h 22m

$298

BismarckSeattle

BIS - SEA

BISSEA

Bismarck

Wed 3/4

1:28 pm-8:46 pm

1 stop9h 18m

Seattle/Tacoma Intl

Mon 3/9

11:59 pm-10:27 am

1 stop8h 28m

$299

BismarckSeattle

BIS - SEA

BISSEA

Bismarck

Tue 3/3

1:28 pm-8:46 pm

1 stop9h 18m

Seattle/Tacoma Intl

Tue 3/10

6:00 am-4:15 pm

1 stop8h 15m

$337

BismarckSeattle

BIS - SEA

BISSEA

Bismarck

Tue 2/3

5:10 pm-9:15 pm

1 stop6h 05m

Seattle/Tacoma Intl

Sat 2/7

8:40 am-4:32 pm

1 stop5h 52m

$339

BismarckSeattle

BIS - SEA

BISSEA

Bismarck

Tue 5/12

11:30 am-4:13 pm

1 stop6h 43m

$271

BismarckSeattle

BIS - SEA

BISSEA

Bismarck

Mon 1/5

5:10 pm-9:17 pm

1 stop6h 07m

$271

BismarckSeattle

BIS - SEA

BISSEA

Bismarck

Wed 5/13

11:30 am-4:13 pm

1 stop6h 43m

$271

BismarckSeattle

BIS - SEA

BISSEA

Bismarck

Sat 5/9

6:10 am-12:18 pm

1 stop8h 08m

$271

BismarckSeattle

BIS - SEA

BISSEA

Bismarck

Mon 5/11

5:50 am-2:35 pm

2 stops10h 45m

$276

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/6

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 December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust 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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Bismarck-Seattle flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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 December 9, 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 December 9, 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
7.9
Good
8,011 reviews

Boarding

8.1

Food

7.3

Comfort

7.9

Crew

8.5

Overall

7.9

Entertainment

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
8,011 reviews
Delta
7.9
Good
8,011 reviews

Boarding

8.1

Food

7.3

Comfort

7.9

Crew

8.5

Overall

7.9

Entertainment

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
9,089 reviews
Delta
7.9
Good
8,011 reviews

Boarding

8.1

Food

7.3

Comfort

7.9

Crew

8.5

Overall

7.9

Entertainment

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 $265, Delta can have you in Seattle from Bismarck in 9h 18m. 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 $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
Tacoma
SeaTac
Lakewood
Olympia
Ocean Shores
Edmonds
Lynnwood
Renton
Puyallup
Kirkland
Tukwila
Kent
Cle Elum
Marysville
Leavenworth
Fife
Aberdeen
Shoreline
Centralia
Federal Way

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 December 9, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$258Average$288FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$286Average$547FlexibilityNo cancel feeOn-time69%

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