HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Seattle

$309+ 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 11/24. Fares are subject to change and may not be available on all flights or dates of travel.
BIS — SEA
Dec 13 — Dec 201
Sat 12/13
Sat 12/20
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Bismarck to Seattle with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 November 13, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$309
(United Airlines)

Popular in

May

Cheapest in

February

Average price

$541
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. 20% potential increase in price ($119 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($18 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
Search Deals

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 November 13, 2025.

This United Airlines deal was found by Cheapflights users on 11/13. 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 11/245:15 pmBIS - SEA
1 stop5h 58mUnited Airlines
Tue 12/23:45 pmSEA - BIS
1 stop5h 23mUnited Airlines
Deal found 11/13$309
This United Airlines deal was found by Cheapflights users on 11/11. 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 12/45:15 pmBIS - SEA
1 stop6h 31mUnited Airlines
Tue 12/93:45 pmSEA - BIS
1 stop5h 23mUnited Airlines
Deal found 11/11$339
This United Airlines deal was found by Cheapflights users on 11/11. 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 12/255:45 amBIS - SEA
1 stop6h 10mUnited Airlines
Fri 1/93:30 pmSEA - BIS
1 stop6h 00mUnited Airlines
Deal found 11/11$365
This Delta deal was found by Cheapflights users on 11/13. 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.
Thu 12/411:47 amBIS - SEA
1 stop7h 13mDelta
Tue 12/911:55 pmSEA - BIS
1 stop9h 12mDelta
Deal found 11/13$379
This American Airlines deal was found by Cheapflights users on 11/13. 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.
Mon 11/246:00 amBIS - SEA
1 stop10h 59mAmerican Airlines
Mon 12/112:59 amSEA - BIS
1 stop9h 26mAmerican Airlines
Deal found 11/13$417
This Delta deal was found by Cheapflights users on 11/11. 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 11/1411:32 amBIS - SEA
1 stop7h 28mDelta
Sun 11/166:00 amSEA - BIS
1 stop8h 55mDelta
Deal found 11/11$419
This United Airlines deal was found by Cheapflights users on 11/11. 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 11/145:45 amBIS - SEA
2 stops9h 53mUnited Airlines
Sun 11/165:05 amSEA - BIS
1 stop6h 06mUnited Airlines
Deal found 11/11$424

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 November 13, 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 11/24

5:15 pm-9:13 pm

1 stop5h 58m

Seattle/Tacoma Intl

Tue 12/2

3:45 pm-11:08 pm

1 stop5h 23m

$309

BismarckSeattle

BIS - SEA

BISSEA

Bismarck

Wed 1/7

5:30 am-3:44 pm

2 stops12h 14m

Seattle/Tacoma Intl

Sun 1/11

5:00 am-12:51 pm

1 stop5h 51m

$324

BismarckSeattle

BIS - SEA

BISSEA

Bismarck

Thu 12/4

5:15 pm-9:46 pm

1 stop6h 31m

Seattle/Tacoma Intl

Tue 12/9

3:45 pm-11:08 pm

1 stop5h 23m

$339

BismarckSeattle

BIS - SEA

BISSEA

Bismarck

Thu 12/25

5:45 am-9:55 am

1 stop6h 10m

Seattle/Tacoma Intl

Fri 1/9

3:30 pm-11:30 pm

1 stop6h 00m

$365

BismarckSeattle

BIS - SEA

BISSEA

Bismarck

Thu 12/4

11:47 am-5:00 pm

1 stop7h 13m

Seattle/Tacoma Intl

Tue 12/9

11:55 pm-11:07 am

1 stop9h 12m

$379

BismarckSeattle

BIS - SEA

BISSEA

Bismarck

Tue 3/3

1:43 pm-6:03 pm

1 stop6h 20m

Seattle/Tacoma Intl

Sat 3/7

3:00 pm-11:37 pm

1 stop6h 37m

$394

BismarckSeattle

BIS - SEA

BISSEA

Bismarck

Thu 11/27

12:19 pm-5:10 pm

1 stop6h 51m

$348

BismarckSeattle

BIS - SEA

BISSEA

Bismarck

Thu 11/27

5:45 am-4:15 pm

2 stops12h 30m

$421

BismarckSeattle

BIS - SEA

BISSEA

Bismarck

Thu 11/27

11:50 am-1:22 pm

3 stops51h 32m

$507

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/11

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 November.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
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 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 November 13, 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.

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 November 13, 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
8,007 reviews

Comfort

7.9

Overall

7.9

Crew

8.5

Boarding

8.1

Food

7.3

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
8,007 reviews
Delta
7.9
Good
8,007 reviews

Comfort

7.9

Overall

7.9

Crew

8.5

Boarding

8.1

Food

7.3

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
9,017 reviews
Delta
7.9
Good
8,007 reviews

Comfort

7.9

Overall

7.9

Crew

8.5

Boarding

8.1

Food

7.3

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 $309, United Airlines can have you in Seattle from Bismarck in 5h 58m. The distance between Bismarck and Seattle is about 1011 mi.

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

    Delta, at $258, was found to be the cheapest airline from Bismarck to Seattle. An alternate airline flying to your destination would be United Airlines. Delta is 45% 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
Tacoma
Tukwila
Lakewood
Olympia
Ocean Shores
Lynnwood
Edmonds
Leavenworth
Renton
Kirkland
Lacey
Kent
Cle Elum
Marysville
Puyallup
Federal Way
Fife
Issaquah
Aberdeen

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 November 13, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$258Average$316FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$286Average$566FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.