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$195+ 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 9/8. Fares are subject to change and may not be available on all flights or dates of travel.
BIS — SEA
Aug 25 — Sep 11
Mon 8/25
Mon 9/1
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 August 20, 2025.

Round-trip from

$259
(American Airlines)

One-way from

$195
(Kiwi.com)

Popular in

May

Cheapest in

February

Average price

$427
From Bismarck to Seattle/Tacoma Intl
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One-way flight from Bismarck to Seattle/Tacoma Intl
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Highest demand for flights based on searches. 13% potential increase in price ($80 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($14 potential savings vs. average RT price).
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Average for round-trip flights in August 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 August 20, 2025.

This American Airlines deal was found by Cheapflights users on 8/18. 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.
Tue 10/211:27 pmBIS - SEA
1 stop9h 19mAmerican Airlines
Mon 10/2712:34 amSEA - BIS
1 stop10h 23mAmerican Airlines
Deal found 8/18$259
This Delta deal was found by Cheapflights users on 8/18. 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.
Sun 9/75:00 amBIS - SEA
1 stop5h 48mDelta
Tue 9/166:00 amSEA - BIS
1 stop8h 51mDelta
Deal found 8/18$316
This Delta deal was found by Cheapflights users on 8/18. 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.
Sat 9/65:00 amBIS - SEA
1 stop5h 48mDelta
Thu 9/1111:40 pmSEA - BIS
1 stop8h 57mDelta
Deal found 8/18$324
This United Airlines deal was found by Cheapflights users on 8/18. 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 9/125:20 pmBIS - SEA
1 stop7h 39mUnited Airlines
Sat 9/205:02 amSEA - BIS
1 stop5h 57mUnited Airlines
Deal found 8/18$340
This American Airlines deal was found by Cheapflights users on 8/19. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/101:32 pmBIS - SEA
1 stop8h 37mAmerican Airlines
Mon 9/1510:09 amSEA - BIS
1 stop10h 17mAmerican Airlines
Deal found 8/19$411
This United Airlines deal was found by Cheapflights users on 8/18. 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 9/66:00 amBIS - SEA
2 stops12h 19mUnited Airlines
Thu 9/113:36 pmSEA - BIS
1 stop6h 03mUnited Airlines
Deal found 8/18$422
This United Airlines deal was found by Cheapflights users on 8/18. 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.
Tue 10/216:00 amBIS - SEA
1 stop17h 34mUnited Airlines
Tue 10/289:25 amSEA - BIS
2 stops12h 14mUnited Airlines
Deal found 8/18$427
This Delta deal was found by Cheapflights users on 8/18. 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 9/125:32 pmBIS - SEA
1 stop8h 11mDelta
Sat 9/207:15 amSEA - BIS
2 stops14h 07mDelta
Deal found 8/18$434
This United Airlines deal was found by Cheapflights users on 8/19. 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.
Wed 9/1011:35 amBIS - SEA
1 stop8h 16mUnited Airlines
Mon 9/155:35 pmSEA - BIS
2 stops17h 24mUnited Airlines
Deal found 8/19$447
This Kiwi.com deal was found by Cheapflights users on 8/19. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/111:55 pmBIS - SEA
1 stop5h 56mUnited Airlines
Mon 9/157:00 pmSEA - BIS
1 stop15h 59mUnited Airlines
Deal found 8/19$453
This United Airlines deal was found by Cheapflights users on 8/18. 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 9/75:20 pmBIS - SEA
1 stop7h 39mUnited Airlines
Tue 9/165:35 pmSEA - BIS
2 stops17h 24mUnited Airlines
Deal found 8/18$462

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 August 20, 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 10/21

1:27 pm-8:46 pm

1 stop9h 19m

Seattle/Tacoma Intl

Tue 10/28

11:42 am-10:42 pm

1 stop9h 00m

$259

BismarckSeattle

BIS - SEA

BISSEA

Bismarck

Sun 9/7

5:00 am-8:48 am

1 stop5h 48m

Seattle/Tacoma Intl

Tue 9/16

6:00 am-4:51 pm

1 stop8h 51m

$316

BismarckSeattle

BIS - SEA

BISSEA

Bismarck

Sat 9/6

5:00 am-8:48 am

1 stop5h 48m

Seattle/Tacoma Intl

Thu 9/11

11:40 pm-10:37 am

1 stop8h 57m

$324

BismarckSeattle

BIS - SEA

BISSEA

Bismarck

Fri 9/12

5:20 pm-10:59 pm

1 stop7h 39m

Seattle/Tacoma Intl

Sat 9/20

5:02 am-12:59 pm

1 stop5h 57m

$340

BismarckSeattle

BIS - SEA

BISSEA

Bismarck

Wed 9/10

1:32 pm-8:09 pm

1 stop8h 37m

Seattle/Tacoma Intl

Mon 9/15

10:09 am-10:26 pm

1 stop10h 17m

$411

BismarckSeattle

BIS - SEA

BISSEA

Bismarck

Sat 9/6

6:00 am-4:19 pm

2 stops12h 19m

Seattle/Tacoma Intl

Thu 9/11

3:36 pm-11:39 pm

1 stop6h 03m

$422

BismarckSeattle

BIS - SEA

BISSEA

Bismarck

Tue 10/21

6:00 am-9:34 pm

1 stop17h 34m

Seattle/Tacoma Intl

Tue 10/28

9:25 am-11:39 pm

2 stops12h 14m

$427

BismarckSeattle

BIS - SEA

BISSEA

Bismarck

Fri 9/12

5:32 pm-11:43 pm

1 stop8h 11m

Seattle/Tacoma Intl

Sat 9/20

7:15 am-11:22 pm

2 stops14h 07m

$434

BismarckSeattle

BIS - SEA

BISSEA

Bismarck

Wed 9/10

11:35 am-5:51 pm

1 stop8h 16m

Seattle/Tacoma Intl

Mon 9/15

5:35 pm-12:59 pm

2 stops17h 24m

$447

BismarckSeattle

BIS - SEA

BISSEA

Bismarck

Thu 9/11

1:55 pm-5:51 pm

1 stop5h 56m

Seattle/Tacoma Intl

Mon 9/15

7:00 pm-12:59 pm

1 stop15h 59m

$453

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/18

Showing 1-10 of 21 results
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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, January is the cheapest month in which you can book a flight from Bismarck to Seattle (average of $238). Flying from Bismarck to Seattle in June is currently the most expensive (average of $388). 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 August 20, 2025.

It’s optimal to fly from Bismarck to Seattle at noon. By choosing this option you can save up to 17% on the cost of your flight, compared to a flight in the afternoon.

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 August 20, 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
7,982 reviews

Entertainment

7.9

Crew

8.5

Overall

8.0

Boarding

8.2

Food

7.3

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,982 reviews
Delta
8.0
Very good
7,982 reviews

Entertainment

7.9

Crew

8.5

Overall

8.0

Boarding

8.2

Food

7.3

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,928 reviews
Delta
8.0
Very good
7,982 reviews

Entertainment

7.9

Crew

8.5

Overall

8.0

Boarding

8.2

Food

7.3

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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 $316, American Airlines can have you in Seattle from Bismarck in 5h 48m. 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 55% 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, January is the cheapest month in which you can book a flight from Bismarck to Seattle (average of $238). Flying from Bismarck to Seattle in June is currently the most expensive (average of $388). 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
Lacey
Ocean Shores
Lynnwood
Leavenworth
Renton
Olympia
Kent
Cle Elum
Puyallup
Chehalis
Kirkland
Issaquah
Aberdeen
Shoreline
Federal Way
Shelton

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 August 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$227Average$488FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$287Average$570FlexibilityNo cancel feeOn-time69%

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