$223 Cheap Flights from Bismarck (BIS) to Seattle (SEA)

View $223 flight on Fri, Oct 31, 2025Opens in a new window

Popular airlines from Bismarck, ND (BIS-Bismarck Municipal) to Seattle-Tacoma International Airport (SEA)

Cheap Flights from Bismarck to Seattle (BIS-SEA)

Prices were available within the past 7 days and start at $223 for one-way flights and $259 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Mon, Nov 24 - Mon, Dec 8
BIS
Bismarck
SEA
Seattle
$259 Roundtrip, found 19 hours ago
$259
Roundtrip
found 19 hours ago
Select Delta flight, departing Mon, Nov 24 from Bismarck to Seattle, returning Mon, Dec 8, priced at $259 found 19 hours ago
United
Tue, Nov 4 - Sat, Nov 15
BIS
Bismarck
SEA
Seattle
$264 Roundtrip, found 1 day ago
$264
Roundtrip
found 1 day ago
Select United flight, departing Tue, Nov 4 from Bismarck to Seattle, returning Sat, Nov 15, priced at $264 found 1 day ago
American Airlines
Tue, Nov 4 - Sat, Nov 15
BIS
Bismarck
SEA
Seattle
$265 Roundtrip, found 1 day ago
$265
Roundtrip
found 1 day ago
Select American Airlines flight, departing Tue, Nov 4 from Bismarck to Seattle, returning Sat, Nov 15, priced at $265 found 1 day ago
Delta
Mon, Sep 29 - Sat, Oct 4
BIS
Bismarck
SEA
Seattle
$274 Roundtrip, found 20 hours ago
$274
Roundtrip
found 20 hours ago
Select Delta flight, departing Mon, Sep 29 from Bismarck to Seattle, returning Sat, Oct 4, priced at $274 found 20 hours ago
United
Wed, Sep 24 - Wed, Oct 1
BIS
Bismarck
SEA
Seattle
$279 Roundtrip, found 3 days ago
$279
Roundtrip
found 3 days ago
Select United flight, departing Wed, Sep 24 from Bismarck to Seattle, returning Wed, Oct 1, priced at $279 found 3 days ago
United
Wed, Sep 24 - Wed, Oct 1
BIS
Bismarck
SEA
Seattle
$284 Roundtrip, found 3 days ago
$284
Roundtrip
found 3 days ago
Select United flight, departing Wed, Sep 24 from Bismarck to Seattle, returning Wed, Oct 1, priced at $284 found 3 days ago
United
Tue, Nov 25 - Wed, Dec 3
BIS
Bismarck
SEA
Seattle
$286 Roundtrip, found 20 hours ago
$286
Roundtrip
found 20 hours ago
Select United flight, departing Tue, Nov 25 from Bismarck to Seattle, returning Wed, Dec 3, priced at $286 found 20 hours ago
United
Tue, Nov 4 - Sat, Nov 15
BIS
Bismarck
SEA
Seattle
$288 Roundtrip, found 1 day ago
$288
Roundtrip
found 1 day ago
Select United flight, departing Tue, Nov 4 from Bismarck to Seattle, returning Sat, Nov 15, priced at $288 found 1 day ago
Delta
Mon, Nov 3 - Mon, Nov 17
BIS
Bismarck
SEA
Seattle
$289 Roundtrip, found 1 day ago
$289
Roundtrip
found 1 day ago
Select Delta flight, departing Mon, Nov 3 from Bismarck to Seattle, returning Mon, Nov 17, priced at $289 found 1 day ago
United
Tue, Nov 4 - Wed, Nov 19
BIS
Bismarck
SEA
Seattle
$290 Roundtrip, found 4 days ago
$290
Roundtrip
found 4 days ago
Select United flight, departing Tue, Nov 4 from Bismarck to Seattle, returning Wed, Nov 19, priced at $290 found 4 days ago

Find the cheapest month to fly from Bismarck (BIS) to Seattle (SEA)

April is typically the cheapest month to fly

From $198 - $826 per traveler.

Alternative airports near Seattle

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Seattle - Tacoma Intl. SEA. Cheapest option available. Average driving time to city center is 20 minutes. Flights from $669
SEA
Seattle - Tacoma Intl.
Cheapest
Average driving time to city center20 min
Flights from $669
Flights from Bismarck (BIS) to Seattle (SEA)
Origin airport
Bismarck Municipal
Destination airport
Seattle - Tacoma Intl.
Airlines serving
American Airlines, Delta, United
Roundtrip price
$258
Distance
1010 mi

Bismarck to Seattle Flights

The cheapest times to fly from Bismarck to Seattle

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Bismarck to Seattle are during the month of November. You can find some of the cheapest flights from Bismarck to Seattle with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Bismarck to Seattle

Sunday is one of the best days to book for cheap flights from Bismarck to Seattle: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Bismarck to Seattle

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Bismarck to Seattle in 2025. You can also book with separate airlines for your outbound and return journeys, from $223 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Bismarck to Seattle flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Bismarck to Seattle airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Bismarck Municipal Airport (BIS) to Seattle - Tacoma Intl. Airport (SEA) cost?
Get a cheap one-way flight from $223 or cheap return flight from $259 from Bismarck Municipal Airport (BIS) to Seattle - Tacoma Intl. Airport (SEA) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from Bismarck Municipal Airport (BIS) to Seattle - Tacoma Intl. Airport (SEA)?
The cheapest month to fly from BIS to SEA is November, when there's less demand. Off-peak months are typically when you'll find lower airfares between these airports.
What is the cheapest airline that flies from Bismarck Municipal Airport (BIS) to Seattle - Tacoma Intl. Airport (SEA)?
Use the filter tool on Expedia to compare airlines and find the most affordable carrier that'll take you from BIS to SEA. Then, sort your results by "Price (lowest to highest)" to score a great deal.
How many flights per day from Bismarck Municipal Airport (BIS) to Seattle - Tacoma Intl. Airport (SEA)?
You'll need to catch a flight with a layover when traveling from Bismarck Municipal Airport (BIS) to Seattle - Tacoma Intl. Airport (SEA). There are no daily direct flights on this route. However, just filter your search to include one or more stops to find the best option for your trip.
What day of the week has the most flights from BIS to SEA?
Friday is typically the busiest day for flights, while Tuesday is often the quietest.* Just remember that flight schedules can vary depending on a range of factors, such as the time of year and carrier.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Bismarck Municipal Airport (BIS) to Seattle - Tacoma Intl. Airport (SEA)?
To avoid possible delays on the Bismarck Municipal Airport (BIS) to Seattle - Tacoma Intl. Airport (SEA) route, fly before 3 PM. Departures after this time are 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Bismarck Municipal Airport (BIS) to Seattle - Tacoma Intl. Airport (SEA) last-minute?
Booking your flight from BIS to SEA right before your journey is usually more expensive. However, if you're flexible with your travel times and dates, you could land a cheap last-minute fare.
Is it cheaper to book a BIS to SEA flight and hotel package?
Compared with arranging flights and hotels separately, booking a BIS to SEA flight and hotel package with Expedia could lead to significant savings. Better yet, having everything in one easy place will take the hassle out of travel planning. Simply pick your flights and select from our wide range of hotels, then customize your trip with extras like activities and car rentals.
Can I cancel or change the date of my flight from Bismarck Municipal Airport (BIS) to Seattle - Tacoma Intl. Airport (SEA)?
In most cases, you can cancel or reschedule your BIS to SEA flight. However, additional fees may apply, especially if you booked more than 24 hours ago. Double-check your itinerary for the airline's policies and fees on flight changes, or if you'd like more details, go to our Customer Service portal.

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*Available to One Key members.