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$215+ 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 7/15. Fares are subject to change and may not be available on all flights or dates of travel.
BIS — SEA
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 June 12, 2025.

Round-trip from

$259
(Delta)

One-way from

$215
(United Airlines)

Popular in

May

Cheapest in

February

Average price

$545
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. 10% potential increase in price ($61 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($13 potential savings vs. average RT price).
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Average for round-trip flights in June 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 June 12, 2025.

This Delta deal was found by Cheapflights users on 6/12. 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.
Thu 8/215:42 pmBIS - SEA
1 stop8h 12mDelta
Mon 8/2511:55 pmSEA - BIS
1 stop8h 44mDelta
Deal found 6/12$259
This American Airlines deal was found by Cheapflights users on 6/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/81:22 pmBIS - SEA
1 stop8h 40mAmerican Airlines
Fri 8/1512:45 amSEA - BIS
1 stop10h 03mAmerican Airlines
Deal found 6/11$419
This United Airlines deal was found by Cheapflights users on 6/12. 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.
Thu 8/2111:35 amBIS - SEA
2 stops9h 14mUnited Airlines
Mon 8/255:07 amSEA - BIS
1 stop5h 52mUnited Airlines
Deal found 6/12$436

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 June 12, 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

Thu 8/21

5:42 pm-11:54 pm

1 stop8h 12m

Seattle/Tacoma Intl

Mon 8/25

11:55 pm-10:39 am

1 stop8h 44m

$259

BismarckSeattle

BIS - SEA

BISSEA

Bismarck

Fri 8/8

1:22 pm-8:02 pm

1 stop8h 40m

Seattle/Tacoma Intl

Fri 8/15

12:45 am-12:48 pm

1 stop10h 03m

$419

BismarckSeattle

BIS - SEA

BISSEA

Bismarck

Thu 8/21

11:35 am-6:49 pm

2 stops9h 14m

Seattle/Tacoma Intl

Mon 8/25

5:07 am-12:59 pm

1 stop5h 52m

$436

BismarckSeattle

BIS - SEA

BISSEA

Bismarck

Tue 7/15

11:30 am-8:56 pm

2 stops11h 26m

$215

BismarckSeattle

BIS - SEA

BISSEA

Bismarck

Tue 7/15

5:00 am-8:45 am

1 stop5h 45m

$228

BismarckSeattle

BIS - SEA

BISSEA

Bismarck

Fri 7/11

12:39 pm-8:25 pm

1 stop9h 46m

$295

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

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 July is currently the most expensive (average of $391). 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 June 12, 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.

Rainfall in Seattle by month

Plan your trip to Seattle by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Seattle ranges from 0.7 - 6.6 inches per month. November is typically the wettest month, when rainfall can reach 6.6 in. July is typically the driest time to visit Seattle when rainfall is around 0.7 in.

Temperature in Seattle by month

Plan your trip to Seattle by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Seattle, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 66.2 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 41.0 F).

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 June 12, 2025.
Delta
8.0
Very good
7,946 reviews

Overall

8.0

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Crew

8.5

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
7,946 reviews
Delta
8.0
Very good
7,946 reviews

Overall

8.0

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Crew

8.5

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
8,790 reviews
Delta
8.0
Very good
7,946 reviews

Overall

8.0

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Crew

8.5

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!
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,946 reviews

Overall

8.0

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Crew

8.5

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.

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

    Delta, at $259, was found to be the cheapest airline from Bismarck to Seattle.Alternate airlines to your destination round-trip include American Airlines and United Airlines. Delta is 51% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the cheapest airlines to fly from Bismarck to Seattle one-way?

    $215 is the cheapest one-way deal found within the past few days, from United Airlines. You may also be able to find cheap deals on Delta and American Airlines, with prices starting from $228 and $295, respectively.

  • 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 July is currently the most expensive (average of $391). 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 Bismarck?

Book flights to Bismarck if you plan to visit one of these locations
SeaTac
Tukwila
Tacoma
Lakewood
Ocean Shores
Lacey
Leavenworth
Federal Way
Lynnwood
Olympia
Shoreline
Kent
Cle Elum
Centralia
Kirkland
Aberdeen
Renton
Shelton
Silverdale
Issaquah

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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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$258Average$493FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$364Average$585FlexibilityNo cancel feeOn-time69%

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