$309+ 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 9/26. Fares are subject to change and may not be available on all flights or dates of travel.
BIS — SEA
Sep 27 — Oct 41
Round-trip
1 adult, Economy
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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
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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
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Cheapest flights from Bismarck to SeattleExplore 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 28, 2026.
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 28, 2026.
This Delta deal was found by Cheapflights users on 8/25. 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.
Mon 9/215:00 am -
1 stop7h 39m
Mon 9/2811:59 pm -
1 stop8h 33m
Deal found 8/25![Delta logo]()
$329
This United Airlines deal was found by Cheapflights users on 8/27. 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 9/285:00 pm -
1 stop7h 59m
Sat 10/31:22 pm -
2 stops8h 21m
Deal found 8/27![United Airlines logo]()
$330
This Delta deal was found by Cheapflights users on 8/27. 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 9/269:40 am -
1 stop9h 05m
Thu 10/111:59 pm -
1 stop8h 33m
Deal found 8/27![Delta logo]()
$350
This Delta deal was found by Cheapflights users on 8/27. 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 9/269:40 am -
1 stop9h 05m
Sat 10/36:00 am -
1 stop9h 00m
Deal found 8/27![Delta logo]()
$390
This Delta deal was found by Cheapflights users on 8/27. 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 9/275:40 pm -
1 stop8h 15m
Sat 10/36:00 am -
1 stop9h 00m
Deal found 8/27![Delta logo]()
$394
This Delta deal was found by Cheapflights users on 8/24. 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 9/65:00 am -
1 stop5h 48m
Sat 9/122:56 pm -
1 stop6h 15m
Deal found 8/24![Delta logo]()
$395
This Delta deal was found by Cheapflights users on 8/27. 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 9/55:36 pm -
1 stop6h 24m
Fri 9/116:00 am -
1 stop9h 00m
Deal found 8/27![Delta logo]()
$399
This United Airlines deal was found by Cheapflights users on 8/27. 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 9/296:00 am -
2 stops8h 23m
Sat 10/31:22 pm -
2 stops8h 21m
Deal found 8/27![United Airlines logo]()
$421
This Delta deal was found by Cheapflights users on 8/27. 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 9/269:40 am -
1 stop9h 05m
Fri 10/27:30 am -
2 stops13h 41m
Deal found 8/27![Delta logo]()
$423
Best flights from Bismarck to SeattleDiscover carefully curated flight deals from Bismarck to Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 28, 2026.
Discover carefully curated flight deals from Bismarck to Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 28, 2026.
This Delta deal was found by Cheapflights users on 8/25. 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.
Mon 9/215:00 am -
1 stop7h 39m
Mon 9/2811:59 pm -
1 stop8h 33m
Deal found 8/25![Delta logo]()
$329
This United Airlines deal was found by Cheapflights users on 8/23. 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 9/265:00 pm -
1 stop6h 15m
Wed 9/309:05 am -
2 stops12h 38m
Deal found 8/23![United Airlines logo]()
$472
This Delta deal was found by Cheapflights users on 8/23. 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 9/255:40 pm -
1 stop8h 15m
Mon 9/2811:59 pm -
1 stop8h 33m
Deal found 8/23![Delta logo]()
$434
This United Airlines deal was found by Cheapflights users on 8/24. 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 9/86:00 am -
1 stop7h 57m
Sat 9/129:00 am -
2 stops12h 38m
Deal found 8/24![United Airlines logo]()
$496
This Delta deal was found by Cheapflights users on 8/27. 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 9/275:40 pm -
1 stop8h 15m
Mon 10/511:59 pm -
1 stop17h 56m
Deal found 8/27![Delta logo]()
$508
This Delta deal was found by Cheapflights users on 8/27. 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 10/293:18 pm -
1 stop7h 32m
Sun 11/16:00 am -
1 stop8h 26m
Deal found 8/27![Delta logo]()
$612
Last-minute flights from Bismarck to SeattleDiscover last-minute flight deals from Bismarck to Seattle. Data last updated August 28, 2026 and is based on user searches.
Discover last-minute flight deals from Bismarck to Seattle. Data last updated August 28, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 8/27. 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 9/55:36 pm -
1 stop6h 24m
Fri 9/116:00 am -
1 stop9h 00m
Deal found 8/27![Delta logo]()
$399
This Delta deal was found by Cheapflights users on 8/24. 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 9/65:00 am -
1 stop5h 48m
Sat 9/122:56 pm -
1 stop6h 15m
Deal found 8/24![Delta logo]()
$395
This Delta deal was found by Cheapflights users on 8/25. 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.
Mon 9/215:00 am -
1 stop7h 39m
Mon 9/2811:59 pm -
1 stop8h 33m
Deal found 8/25![Delta logo]()
$329
This Delta deal was found by Cheapflights users on 8/27. 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 9/269:40 am -
1 stop9h 05m
Thu 10/111:59 pm -
1 stop8h 33m
Deal found 8/27![Delta logo]()
$350
This Delta deal was found by Cheapflights users on 8/27. 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 9/269:40 am -
1 stop9h 05m
Sat 10/36:00 am -
1 stop9h 00m
Deal found 8/27![Delta logo]()
$390
This Delta deal was found by Cheapflights users on 8/27. 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 9/269:40 am -
1 stop9h 05m
Fri 10/27:30 am -
2 stops13h 41m
Deal found 8/27![Delta logo]()
$423
This Delta deal was found by Cheapflights users on 8/27. 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 9/275:40 pm -
1 stop8h 15m
Sat 10/36:00 am -
1 stop9h 00m
Deal found 8/27![Delta logo]()
$394
This United Airlines deal was found by Cheapflights users on 8/27. 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 9/285:00 pm -
1 stop7h 59m
Sat 10/31:22 pm -
2 stops8h 21m
Deal found 8/27![United Airlines logo]()
$330
This United Airlines deal was found by Cheapflights users on 8/27. 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 9/296:00 am -
2 stops8h 23m
Sat 10/31:22 pm -
2 stops8h 21m
Deal found 8/27![United Airlines logo]()
$421
One-way flights from Bismarck to SeattleSearch for one-way flight options from Bismarck to Seattle. Find affordable one-way fares based on user searches. Data last updated August 28, 2026.
Search for one-way flight options from Bismarck to Seattle. Find affordable one-way fares based on user searches. Data last updated August 28, 2026.
This Delta deal was found by Cheapflights users on 8/25. 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 9/261:17 pm -
1 stop9h 19m
Deal found 8/25![Delta logo]()
$309
This United Airlines deal was found by Cheapflights users on 8/25. 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 9/269:05 am -
2 stops13h 56m
Deal found 8/25![United Airlines logo]()
$314
This United Airlines deal was found by Cheapflights users on 8/24. 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 9/86:00 am -
1 stop7h 57m
Deal found 8/24![United Airlines logo]()
$384
This American Airlines deal was found by Cheapflights users on 8/24. 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 9/86:45 am -
2 stops12h 07m
Deal found 8/24![American Airlines logo]()
$392
This Kiwi.com deal was found by Cheapflights users on 8/27. 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 9/32:40 pm -
2 stops44h 39m
Deal found 8/27![Multiple Airlines logo]()
$441
This American Airlines deal was found by Cheapflights users on 8/27. 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.
Thu 9/31:55 pm -
1 stop7h 52m
Deal found 8/27![American Airlines logo]()
$452
This Kiwi.com deal was found by Cheapflights users on 8/25. 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.
Sat 9/265:40 pm -
3 stops39h 26m
Deal found 8/25![Multiple Airlines logo]()
$816
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 August 28, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $329 (Delta) |
One-way from | $309 (Delta) |
Popular in | June |
Cheapest in | July |
Average price | $411 |
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 7,457,451 searches. Data last updated August 28, 2026.
Use the filters below to find and compare flights from Bismarck to Seattle that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
BismarckSeattle
BIS Bismarck - SEA Seattle/Tacoma Intl
BISSEA
Bismarck
Mon 9/21
5:00 am-10:39 am
1 stop7h 39m
Seattle/Tacoma Intl
Mon 9/28
11:59 pm-10:32 am
1 stop8h 33m
$329
BismarckSeattle
BIS Bismarck - SEA Seattle/Tacoma Intl
BISSEA
Bismarck
Fri 9/25
5:40 pm-11:55 pm
1 stop8h 15m
Seattle/Tacoma Intl
Mon 9/28
11:59 pm-10:32 am
1 stop8h 33m
$434
BismarckSeattle
BIS Bismarck - SEA Seattle/Tacoma Intl
BISSEA
Bismarck
Sat 9/26
5:00 pm-9:15 pm
1 stop6h 15m
Seattle/Tacoma Intl
Wed 9/30
9:05 am-11:43 pm
2 stops12h 38m
$472
BismarckSeattle
BIS Bismarck - SEA Seattle/Tacoma Intl
BISSEA
Bismarck
Tue 9/8
6:00 am-11:57 am
1 stop7h 57m
Seattle/Tacoma Intl
Sat 9/12
9:00 am-11:38 pm
2 stops12h 38m
$496
BismarckSeattle
BIS Bismarck - SEA Seattle/Tacoma Intl
BISSEA
Bismarck
Sun 9/27
5:40 pm-11:55 pm
1 stop8h 15m
Seattle/Tacoma Intl
Mon 10/5
11:59 pm-7:55 pm
1 stop17h 56m
$508
Quickest round-trip
BismarckSeattle
BIS Bismarck - SEA Seattle/Tacoma Intl
BISSEA
Bismarck
Thu 10/29
3:18 pm-8:50 pm
1 stop7h 32m
Seattle/Tacoma Intl
Sun 11/1
6:00 am-4:26 pm
1 stop8h 26m
$612
Cheapest one-way
BismarckSeattle
BIS Bismarck - SEA Seattle/Tacoma Intl
BISSEA
Bismarck
Sat 9/26
1:17 pm-8:36 pm
1 stop9h 19m
$309
BismarckSeattle
BIS Bismarck - SEA Seattle/Tacoma Intl
BISSEA
Bismarck
Sat 9/26
9:05 am-9:01 pm
2 stops13h 56m
$314
BismarckSeattle
BIS Bismarck - SEA Seattle/Tacoma Intl
BISSEA
Bismarck
Tue 9/8
6:00 am-11:57 am
1 stop7h 57m
$384
BismarckSeattle
BIS Bismarck - SEA Seattle/Tacoma Intl
BISSEA
Bismarck
Tue 9/8
6:45 am-4:52 pm
2 stops12h 07m
$392
Showing 1-10 of 13 resultsSorted by cheapest first
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 August.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Bismarck-Seattle flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Bismarck-Seattle flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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.
BIS-SEA
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, July is the cheapest month in which you can book a flight from Bismarck to Seattle (average of $264). Flying from Bismarck to Seattle in June is currently the most expensive (average of $741). 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.
How much does it cost to fly round-trip from Bismarck to Seattle?
Airfare is below average for this route at the moment.
Bismarck to Seattle flights typically cost between $400 and $570 in September.The cheapest round-trip price found within the last 5 days was $329 on Delta (Sep 21-Sep 28).
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 28, 2026.
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.
Overall
7.8
Comfort
7.8
Crew
8.5
Boarding
8.1
Entertainment
7.8
Food
7.2
Reviews
1 / 20
8.0
ExcellentLesley,Aug 2023
LIH - SEA
Overall
7.8
Comfort
7.8
Crew
8.5
Boarding
8.1
Entertainment
7.8
Food
7.2
Reviews
1 / 20
8.0
ExcellentLesley,Aug 2023
LIH - SEA
Overall
7.8
Comfort
7.8
Crew
8.5
Boarding
8.1
Entertainment
7.8
Food
7.2
Reviews
1 / 20
8.0
ExcellentLesley,Aug 2023
LIH - SEA
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.
Traveling to a place near Seattle?
Book flights to Seattle if you plan to visit one of these locationsSeaTac
Renton
Tacoma
Lacey
Leavenworth
Tukwila
Olympia
Edmonds
Snoqualmie
Lynnwood
Centralia
Puyallup
Kent
Tumwater
Ellensburg
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Bismarck and Seattle flights
Browse other Bismarck and Seattle flight options. Last updated on August 28, 2026.
Other flights from Bismarck
Browse through other flights departing from Bismarck. Flights are based on user searches made on Cheapflights and were last updated on August 28, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Other flights to Seattle
Explore flights to Seattle departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on August 28, 2026.
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 7,457,451 searches. Data last updated August 28, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$264 | Average$328 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$310 | Average$464 | FlexibilityNo cancel fee | On-time69% |