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$271+ 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 10/21. Fares are subject to change and may not be available on all flights or dates of travel.
BIS — SEA
Oct 14 — Oct 211
Tue 10/14
Tue 10/21
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 September 14, 2025.

Round-trip from

$274
(Delta)

One-way from

$271
(American Airlines)

Popular in

May

Cheapest in

October

Average price

$467
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. 18% potential increase in price ($108 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($17 potential savings vs. average RT price).
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Average for round-trip flights in September 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 September 14, 2025.

This United Airlines deal was found by Cheapflights users on 9/12. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/165:45 amBIS - SEA
1 stop6h 24mUnited Airlines
Tue 12/305:02 amSEA - BIS
1 stop6h 08mUnited Airlines
Deal found 9/12$286
This United Airlines deal was found by Cheapflights users on 9/12. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/165:45 amBIS - SEA
1 stop6h 24mUnited Airlines
Mon 12/295:02 amSEA - BIS
1 stop6h 08mUnited Airlines
Deal found 9/12$325
This United Airlines deal was found by Cheapflights users on 9/14. 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 9/181:55 pmBIS - SEA
1 stop5h 56mUnited Airlines
Sat 9/207:00 amSEA - BIS
2 stops11h 46mUnited Airlines
Deal found 9/14$371
This United Airlines deal was found by Cheapflights users on 9/13. 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 9/225:20 pmBIS - SEA
1 stop6h 02mUnited Airlines
Sat 9/275:00 amSEA - BIS
1 stop5h 54mUnited Airlines
Deal found 9/13$379
This American Airlines deal was found by Cheapflights users on 9/12. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/132:58 pmBIS - SEA
1 stop10h 40mAmerican Airlines
Sat 12/2712:12 amSEA - BIS
1 stop10h 19mAmerican Airlines
Deal found 9/12$430
This United Airlines deal was found by Cheapflights users on 9/12. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/131:50 pmBIS - SEA
1 stop6h 35mUnited Airlines
Sun 12/285:02 amSEA - BIS
1 stop6h 08mUnited Airlines
Deal found 9/12$445

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 September 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

Tue 3/3

11:30 am-4:19 pm

1 stop6h 49m

Seattle/Tacoma Intl

Sat 3/7

6:05 am-4:53 pm

1 stop8h 48m

$274

BismarckSeattle

BIS - SEA

BISSEA

Bismarck

Tue 12/16

5:45 am-10:09 am

1 stop6h 24m

Seattle/Tacoma Intl

Tue 12/30

5:02 am-1:10 pm

1 stop6h 08m

$286

BismarckSeattle

BIS - SEA

BISSEA

Bismarck

Tue 12/16

5:45 am-10:09 am

1 stop6h 24m

Seattle/Tacoma Intl

Mon 12/29

5:02 am-1:10 pm

1 stop6h 08m

$325

BismarckSeattle

BIS - SEA

BISSEA

Bismarck

Tue 3/3

6:30 pm-11:05 pm

1 stop6h 35m

Seattle/Tacoma Intl

Sat 3/7

9:25 am-11:37 pm

2 stops12h 12m

$344

BismarckSeattle

BIS - SEA

BISSEA

Bismarck

Sat 12/13

2:58 pm-11:38 pm

1 stop10h 40m

Seattle/Tacoma Intl

Sat 12/27

12:12 am-12:31 pm

1 stop10h 19m

$430

BismarckSeattle

BIS - SEA

BISSEA

Bismarck

Sat 12/13

1:50 pm-6:25 pm

1 stop6h 35m

Seattle/Tacoma Intl

Sun 12/28

5:02 am-1:10 pm

1 stop6h 08m

$445

BismarckSeattle

BIS - SEA

BISSEA

Bismarck

Tue 10/21

7:30 am-12:58 pm

1 stop7h 28m

$271

BismarckSeattle

BIS - SEA

BISSEA

Bismarck

Tue 10/21

8:00 am-4:20 pm

2 stops10h 20m

$316

BismarckSeattle

BIS - SEA

BISSEA

Bismarck

Wed 12/17

9:08 am-9:00 pm

2 stops13h 52m

$334

BismarckSeattle

BIS - SEA

BISSEA

Bismarck

Wed 12/17

7:40 am-12:58 pm

1 stop7h 18m

$339

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

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 September 14, 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.

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 September 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
7,956 reviews

Boarding

8.2

Crew

8.5

Food

7.3

Overall

8.0

Entertainment

7.9

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
7,956 reviews
Delta
8.0
Very good
7,956 reviews

Boarding

8.2

Crew

8.5

Food

7.3

Overall

8.0

Entertainment

7.9

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
8,931 reviews
Delta
8.0
Very good
7,956 reviews

Boarding

8.2

Crew

8.5

Food

7.3

Overall

8.0

Entertainment

7.9

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 $286, Delta can have you in Seattle from Bismarck in 6h 24m. 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 53% 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
Ocean Shores
Lynnwood
Edmonds
Leavenworth
Lacey
Renton
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 September 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$227Average$416FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$286Average$567FlexibilityNo cancel feeOn-time69%

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