What is the cheapest airline that flies from Bismarck to Seattle/Tacoma Intl?

United Airlines and American Airlines are the most popular carriers operating from Bismarck to Seattle/Tacoma Intl

When did momondo last update prices for flights from Bismarck Airport to Seattle/Tacoma Intl Airport?

Prices for flights from Bismarck Airport to Seattle/Tacoma Intl Airport refresh daily.

How many operators does momondo search for flights from Bismarck Airport to Seattle/Tacoma Intl Airport?

As of November 2026, there are 2 operators available to choose from for flights from Bismarck Airport to Seattle/Tacoma Intl Airport.

How old do you have to be to fly from Bismarck Airport to Seattle/Tacoma Intl Airport?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Bismarck Airport to Seattle/Tacoma Intl Airport.

What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

The travel and health documents you'll need for your trip to Seattle/Tacoma Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Seattle/Tacoma Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$365 Cheap Flights from Bismarck to Seattle in 2026/27

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Bismarck to Seattle

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

12:35 pm - 4:35 pmBIS Bismarck-SEA Seattle/Tacoma Intl

6h 00m1 stop Minneapolis St Paul

11:50 am - 7:57 pmSEA Seattle/Tacoma Intl-BIS Bismarck

6h 07m1 stop Minneapolis St Paul

$365Delta

Wed, Mar 24 - Wed, Mar 31

5:00 am - 10:45 amBIS Bismarck-SEA Seattle/Tacoma Intl

7h 45m1 stop Minneapolis St Paul

6:00 am - 4:59 pmSEA Seattle/Tacoma Intl-BIS Bismarck

8h 59m1 stop Minneapolis St Paul

$369Delta

Sat, Dec 5 - Tue, Dec 8

5:00 am - 10:45 amBIS Bismarck-SEA Seattle/Tacoma Intl

7h 45m1 stop Minneapolis St Paul

6:00 am - 4:40 pmSEA Seattle/Tacoma Intl-BIS Bismarck

8h 40m1 stop Minneapolis St Paul

$369Delta

Sat, Dec 5 - Sat, Dec 12

5:00 am - 12:19 pmBIS Bismarck-SEA Seattle/Tacoma Intl

9h 19m1 stop Minneapolis St Paul

6:00 am - 4:54 pmSEA Seattle/Tacoma Intl-BIS Bismarck

8h 54m1 stop Minneapolis St Paul

$394Delta

Thu, Feb 18 - Mon, Feb 22

1:23 pm - 6:12 pmBIS Bismarck-SEA Seattle/Tacoma Intl

6h 49m1 stop Denver Intl

4:00 pm - 11:44 pmSEA Seattle/Tacoma Intl-BIS Bismarck

5h 44m1 stop Denver Intl

$396United Airlines

Fri, Jan 22 - Mon, Feb 1

1:23 pm - 11:15 pmBIS Bismarck-SEA Seattle/Tacoma Intl

11h 52m2 stops Denver Intl San Francisco

4:00 pm - 11:44 pmSEA Seattle/Tacoma Intl-BIS Bismarck

5h 44m1 stop Denver Intl

$408United Airlines

Fri, Jan 22 - Mon, Feb 1

1:15 pm - 8:47 pmBIS Bismarck-SEA Seattle/Tacoma Intl

9h 32m2 stops Denver Intl San Francisco

8:30 am - 4:17 pmSEA Seattle/Tacoma Intl-BIS Bismarck

5h 47m1 stop Denver Intl

$416United Airlines

Sat, Dec 5 - Sat, Dec 12

2:06 pm - 10:38 pmBIS Bismarck-SEA Seattle/Tacoma Intl

10h 32m1 stop Dallas/Fort Worth

11:39 pm - 1:36 pmSEA Seattle/Tacoma Intl-BIS Bismarck

11h 57m2 stops Chicago O'Hare Intl Dallas/Fort Worth

$482American Airlines

Fri, Dec 4 - Tue, Dec 8

10:10 pm - 12:37 pmBIS Bismarck-SEA Seattle/Tacoma Intl

16h 27m1 stop Las Vegas Harry Reid Intl

9:53 pm - 8:55 pmSEA Seattle/Tacoma Intl-BIS Bismarck

21h 02m1 stop Las Vegas Harry Reid Intl

$526Multiple Airlines

Thu, Nov 19 - Mon, Nov 23

2:26 pm - 11:28 pmBIS Bismarck-SEA Seattle/Tacoma Intl

11h 02m1 stop Dallas/Fort Worth

11:41 am - 10:55 pmSEA Seattle/Tacoma Intl-BIS Bismarck

9h 14m1 stop Dallas/Fort Worth

$533American Airlines

Wed, Apr 7 - Sun, Apr 11

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Delta flights from Bismarck to Seattle

Our best Delta deals on Bismarck to Seattle flight tickets

Delta

Mar 24

BIS12:35 pmBismarck

6h 00m

1 stop

SEA4:35 pmSeattle/Tacoma Intl

Mar 31

SEA11:50 amSeattle/Tacoma Intl

6h 07m

1 stop

BIS7:57 pmBismarck

$365

Delta

Dec 5

BIS5:00 amBismarck

7h 45m

1 stop

SEA10:45 amSeattle/Tacoma Intl

Dec 8

SEA6:00 amSeattle/Tacoma Intl

8h 59m

1 stop

BIS4:59 pmBismarck

$369

Delta

Feb 18

BIS5:00 amBismarck

9h 19m

1 stop

SEA12:19 pmSeattle/Tacoma Intl

Feb 22

SEA6:00 amSeattle/Tacoma Intl

8h 54m

1 stop

BIS4:54 pmBismarck

$394

United Airlines flights from Bismarck to Seattle

Our best United Airlines deals on Bismarck to Seattle flight tickets

United Airlines

Jan 22

BIS1:23 pmBismarck

6h 49m

1 stop

SEA6:12 pmSeattle/Tacoma Intl

Feb 1

SEA4:00 pmSeattle/Tacoma Intl

5h 44m

1 stop

BIS11:44 pmBismarck

$396

United Airlines

Jan 22

BIS1:23 pmBismarck

11h 52m

2 stops

SEA11:15 pmSeattle/Tacoma Intl

Feb 1

SEA4:00 pmSeattle/Tacoma Intl

5h 44m

1 stop

BIS11:44 pmBismarck

$408

United Airlines

Dec 5

BIS1:15 pmBismarck

9h 32m

2 stops

SEA8:47 pmSeattle/Tacoma Intl

Dec 12

SEA8:30 amSeattle/Tacoma Intl

5h 47m

1 stop

BIS4:17 pmBismarck

$416

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Quickest round-trip

BismarckSeattle

BIS Bismarck - SEA Seattle/Tacoma Intl

BISSEA

Bismarck

Wed 3/24

12:35 pm-4:35 pm

1 stop6h 00m

Seattle/Tacoma Intl

Wed 3/31

11:50 am-7:57 pm

1 stop6h 07m

$365

BismarckSeattle

BIS Bismarck - SEA Seattle/Tacoma Intl

BISSEA

Bismarck

Sat 12/5

5:00 am-10:45 am

1 stop7h 45m

Seattle/Tacoma Intl

Tue 12/8

6:00 am-4:59 pm

1 stop8h 59m

$369

BismarckSeattle

BIS Bismarck - SEA Seattle/Tacoma Intl

BISSEA

Bismarck

Sat 12/5

5:00 am-10:45 am

1 stop7h 45m

Seattle/Tacoma Intl

Sat 12/12

6:00 am-4:40 pm

1 stop8h 40m

$369

BismarckSeattle

BIS Bismarck - SEA Seattle/Tacoma Intl

BISSEA

Bismarck

Thu 2/18

5:00 am-12:19 pm

1 stop9h 19m

Seattle/Tacoma Intl

Mon 2/22

6:00 am-4:54 pm

1 stop8h 54m

$394

BismarckSeattle

BIS Bismarck - SEA Seattle/Tacoma Intl

BISSEA

Bismarck

Fri 1/22

1:23 pm-6:12 pm

1 stop6h 49m

Seattle/Tacoma Intl

Mon 2/1

4:00 pm-11:44 pm

1 stop5h 44m

$396

BismarckSeattle

BIS Bismarck - SEA Seattle/Tacoma Intl

BISSEA

Bismarck

Fri 1/22

1:23 pm-11:15 pm

2 stops11h 52m

Seattle/Tacoma Intl

Mon 2/1

4:00 pm-11:44 pm

1 stop5h 44m

$408

BismarckSeattle

BIS Bismarck - SEA Seattle/Tacoma Intl

BISSEA

Bismarck

Sat 12/5

1:15 pm-8:47 pm

2 stops9h 32m

Seattle/Tacoma Intl

Sat 12/12

8:30 am-4:17 pm

1 stop5h 47m

$416

BismarckSeattle

BIS Bismarck - SEA Seattle/Tacoma Intl

BISSEA

Bismarck

Fri 12/4

2:06 pm-10:38 pm

1 stop10h 32m

Seattle/Tacoma Intl

Tue 12/8

11:39 pm-1:36 pm

2 stops11h 57m

$482

BismarckSeattle

BIS Bismarck - SEA Seattle/Tacoma Intl

BISSEA

Bismarck

Thu 11/19

10:10 pm-12:37 pm

1 stop16h 27m

Seattle/Tacoma Intl

Mon 11/23

9:53 pm-8:55 pm

1 stop21h 02m

$526

BismarckSeattle

BIS Bismarck - SEA Seattle/Tacoma Intl

BISSEA

Bismarck

Wed 4/7

2:26 pm-11:28 pm

1 stop11h 02m

Seattle/Tacoma Intl

Sun 4/11

11:41 am-10:55 pm

1 stop9h 14m

$533

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 16 resultsSorted by cheapest first

How to get the cheapest flight ticket from Bismarck to Seattle

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

What is the cheapest month to fly to Seattle?

In general, March is the cheapest month to fly from Bismarck to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $399. If you don’t want to visit Seattle in March, then you should wait until February to fly from Bismarck, when ticket prices are also cheap, with an average price of $408.

When to book flights from Bismarck to Seattle

Are you open to changing your travel dates? Check out the ideal times to fly from Bismarck to Seattle according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Bismarck to Seattle (BIS to SEA) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Bismarck to Seattle

Best Price Found	$398
Fastest flight time	5h 57m
Direct flights	None

The best one-way flight to Seattle from Bismarck in the past 72 hours is $398. The best round-trip flight deal from Bismarck to Seattle found on momondo in the last 72 hours is $365.

The fastest flight from Bismarck to Seattle takes 5h 57m

There are no direct flights from Bismarck to Seattle. There are no popular flight routes from Bismarck to Seattle.

Search flight deals

Frequently asked questions about flying from Bismarck to Seattle

How far is Bismarck to Seattle/Tacoma Intl by plane?
Seattle/Tacoma Intl is 1009.3 mi away from Bismarck. Flights usually cover this in 5h 57m, depending on flying conditions and air traffic around both airports.
When did momondo last update prices for flights from Bismarck Airport to Seattle/Tacoma Intl Airport?
Prices for flights from Bismarck Airport to Seattle/Tacoma Intl Airport refresh daily.
How many operators does momondo search for flights from Bismarck Airport to Seattle/Tacoma Intl Airport?
As of November 2026, there are 2 operators available to choose from for flights from Bismarck Airport to Seattle/Tacoma Intl Airport.
How old do you have to be to fly from Bismarck Airport to Seattle/Tacoma Intl Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Bismarck Airport to Seattle/Tacoma Intl Airport.
What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?
The travel and health documents you'll need for your trip to Seattle/Tacoma Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Seattle/Tacoma Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from Bismarck to Seattle?
momondo data reveals that the most frequently booked airline on the route from Bismarck to Seattle is United Airlines, representing 61% of all bookings. The subsequent popular airline is Delta at 39%.

Best airlines flying from Bismarck to Seattle

Compare and see reviews for airlines that fly from Bismarck to Seattle with momondo

Airline	Rating	Free Cancellation	Price
Delta	PriceFrom $310	Free Cancellation	Rating 7.8 8,700 reviews		Search Delta flights
United Airlines	PriceFrom $310	Free Cancellation	Rating 7.3 10,476 reviews		Search United Airlines flights

Tacoma

Leavenworth

SeaTac

Ocean Shores

Renton

Kent

Olympia

Federal Way

Redmond

Lakewood

Lynnwood

Fife

Puyallup

Tukwila

Cle Elum

Marysville

Lacey

Kirkland

Centralia

Shoreline

Why use momondo?

Why should I use momondo to find a flight deal from Bismarck to Seattle?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Bismarck to Seattle for you.

Can I find flights from Bismarck to Seattle with flexible booking policies on momondo?

All flight searches from Bismarck to Seattle on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Bismarck to Seattle?

Once you have performed a search for Bismarck to Seattle flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Bismarck to Seattle right now. Can momondo alert me if prices change?

Price alerts on flights to Seattle from Bismarck are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.