$233 Cheap Flights from Williston (XWA) to Seattle (SEA)

View $233 flight on Mon, Jul 6, 2026Opens in a new window

Popular airlines from Williston, ND (XWA-Basin Intl.) to Seattle-Tacoma International Airport (SEA)

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Cheap Flights from Williston to Seattle (XWA-SEA)

Prices were available within the past 7 days and start at $233 for one-way flights and $238 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Wed, Jan 14 - Tue, Jan 27
XWA
Williston
SEA
Seattle
$238 Roundtrip, found 1 day ago
$238
Roundtrip
found 1 day ago
Select Delta flight, departing Wed, Jan 14 from Williston to Seattle, returning Tue, Jan 27, priced at $238 found 1 day ago
Delta
Fri, Nov 14 - Fri, Nov 28
XWA
Williston
SEA
Seattle
$243 Roundtrip, found 5 days ago
$243
Roundtrip
found 5 days ago
Select Delta flight, departing Fri, Nov 14 from Williston to Seattle, returning Fri, Nov 28, priced at $243 found 5 days ago
Delta
Tue, Nov 18 - Mon, Nov 24
XWA
Williston
SEA
Seattle
$253 Roundtrip, found 3 days ago
$253
Roundtrip
found 3 days ago
Select Delta flight, departing Tue, Nov 18 from Williston to Seattle, returning Mon, Nov 24, priced at $253 found 3 days ago
Delta
Mon, Nov 10 - Tue, Nov 18
XWA
Williston
SEA
Seattle
$259 Roundtrip, found 6 days ago
$259
Roundtrip
found 6 days ago
Select Delta flight, departing Mon, Nov 10 from Williston to Seattle, returning Tue, Nov 18, priced at $259 found 6 days ago
Delta
Fri, Jan 23 - Tue, Feb 3
XWA
Williston
SEA
Seattle
$263 Roundtrip, found 1 day ago
$263
Roundtrip
found 1 day ago
Select Delta flight, departing Fri, Jan 23 from Williston to Seattle, returning Tue, Feb 3, priced at $263 found 1 day ago
Delta
Thu, Jan 22 - Tue, Feb 3
XWA
Williston
SEA
Seattle
$269 Roundtrip, found 1 day ago
$269
Roundtrip
found 1 day ago
Select Delta flight, departing Thu, Jan 22 from Williston to Seattle, returning Tue, Feb 3, priced at $269 found 1 day ago
Delta
Thu, Dec 4 - Tue, Dec 16
XWA
Williston
SEA
Seattle
$273 Roundtrip, found 1 day ago
$273
Roundtrip
found 1 day ago
Select Delta flight, departing Thu, Dec 4 from Williston to Seattle, returning Tue, Dec 16, priced at $273 found 1 day ago
Delta
Sun, Nov 9 - Fri, Nov 28
XWA
Williston
SEA
Seattle
$273 Roundtrip, found 5 days ago
$273
Roundtrip
found 5 days ago
Select Delta flight, departing Sun, Nov 9 from Williston to Seattle, returning Fri, Nov 28, priced at $273 found 5 days ago
Delta
Fri, Nov 7 - Fri, Nov 14
XWA
Williston
SEA
Seattle
$278 Roundtrip, found 5 days ago
$278
Roundtrip
found 5 days ago
Select Delta flight, departing Fri, Nov 7 from Williston to Seattle, returning Fri, Nov 14, priced at $278 found 5 days ago
United
Wed, Nov 12 - Wed, Nov 19
XWA
Williston
SEA
Seattle
$296 Roundtrip, found 3 days ago
$296
Roundtrip
found 3 days ago
Select United flight, departing Wed, Nov 12 from Williston to Seattle, returning Wed, Nov 19, priced at $296 found 3 days ago

Find the cheapest month to fly from Williston (XWA) to Seattle (SEA)

September is typically the cheapest month to fly

From $238 - $809 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 $466
SEA
Seattle - Tacoma Intl.
Cheapest
Average driving time to city center20 min
Flights from $466

Frequently asked questions

How much does a flight from Basin Intl. Airport (XWA) to Seattle - Tacoma Intl. Airport (SEA) cost?
Secure a cheap one-way flight from $233 or cheap return flight from $238 from Basin Intl. Airport (XWA) 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 Basin Intl. Airport (XWA) to Seattle - Tacoma Intl. Airport (SEA)?
Planning your getaway for January is a great way to save, as it's the cheapest month for flights between XWA and SEA. You'll typically find the lowest prices during off-peak months.
What is the cheapest airline that flies from Basin Intl. Airport (XWA) to Seattle - Tacoma Intl. Airport (SEA)?
Expedia's filter tool lets you easily compare airlines, flight times and baggage options all in one place. Tailor the search to your trip, then sort by "Price (lowest to highest)" to find the carrier with the cheapest XWA to SEA flight.
How many flights per day from Basin Intl. Airport (XWA) to Seattle - Tacoma Intl. Airport (SEA)?
Nonstop flights from Basin Intl. Airport (XWA) to Seattle - Tacoma Intl. Airport (SEA) aren't available daily, so you'll need to take a flight with a layover. Explore your options with our filter tool. Enter your travel dates and pick either "1 Stop" or "2+ Stops."
What day of the week has the most flights from XWA to SEA?
Friday is typically the busiest day for flights, while Tuesday is often the quietest.* Remember that flight schedules can change depending on various factors, including the season and airline.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Basin Intl. Airport (XWA) to Seattle - Tacoma Intl. Airport (SEA)?
Choose a flight from Basin Intl. Airport (XWA) to Seattle - Tacoma Intl. Airport (SEA) that takes off before 3 PM to reduce the risk of cancellations and delays. Departures after this hour are on average 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 Basin Intl. Airport (XWA) to Seattle - Tacoma Intl. Airport (SEA) last-minute?
Waiting until just before your trip to book a ticket from XWA to SEA often results in higher prices. While you might find some last-minute discounts, they're not always guaranteed. Be flexible with your travel plans to maximize your chances of scoring a bargain.
Is it cheaper to book a XWA to SEA flight and hotel package?
Compared with arranging hotels and flights separately, booking a XWA to SEA flight and hotel package with Expedia could result in significant savings. What's more, having everything in one easy place takes the hassle out of planning your trip. Just secure your flights and select from our extensive range of hotels, then tailor your trip with extras like car rentals and activities.
Can I cancel or change the date of my flight from Basin Intl. Airport (XWA) to Seattle - Tacoma Intl. Airport (SEA)?
If you booked your XWA to SEA flight in the last 24 hours, you may be able to cancel or modify it at no cost. Depending on the airline and the type of ticket you purchased, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, go to our Customer Service portal for more details.

Travel information

Origin airport
Basin Intl.
Destination airport
Seattle - Tacoma Intl.
Airlines serving
Delta, United
Roundtrip price
$238
Distance
859 mi

Book with confidence

Williston to Seattle Flights

The cheapest times to fly from Williston 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 Williston to Seattle are during the month of January. You can find some of the cheapest flights from Williston to Seattle with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Williston to Seattle

Sunday is one of the best days to book for cheap flights from Williston 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 Williston 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 Williston to Seattle in 2025. You can also book with separate airlines for your outbound and return journeys, from $233 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 Williston 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 Williston 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.

 

Williston to Seattle Flights

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*Available to One Key members.