Title: CA $442 Cheap Flights from Seattle (SEA) to Williston (XWA) - Expedia.ca ![Fort Union Trading Post National Historic Site](https://images.trvl-media.com/place/1636/216762a5-d8a6-4666-828a-1f78827c1e83.jpg?impolicy=fcrop&w=1200&h=500&q=medium) ![](https://images.trvl-media.com/place/1636/216762a5-d8a6-4666-828a-1f78827c1e83.jpg?impolicy=fcrop&w=1200&h=500&q=medium) # CA $442 Cheap Flights from Seattle (SEA) to Williston (XWA) [View CA $442 flight on Thu, Oct 30, 2025](https://expedia.ca/Flights-Search?trip=oneway&leg1=from:SEA,to:XWA,departure:30/10/2025TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:441.60&airProductToken=AQptCjQIxJgBEgM5NDMYkgEgzHwojN77AjDZ3_sCOExAAFgBaglNQUlOQ0xBU0NyCExBVU5BME1RCjUIxJgBEgQ0Mjg0GMx8INcFKK7g-wIwn-H7AjhMQAFYAWoJTUFJTkNMQVNDcghMQVVOQTBNURIKCAEQARgBKgJETBgBIgQIARABKAIoAygEMAE) - [Roundtrip](?flightType=roundtrip) - [One-way](?flightType=oneway) - [Multi-city](?flightType=multicity) ### Travellers Adults ChildrenAges 2 to 17 InfantsYounger than 2 EconomyPremium economyBusiness classFirst class Leaving from Going to Departing Returning Add a place to stay Add a car Direct flights only ## Popular airlines from Seattle-Tacoma International Airport (SEA) to Williston, ND (XWA-Basin Intl.) - ![Delta](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_DL.svg) Delta [](https://www.expedia.ca/Flights-Search?leg1=from:sea,to:xwa,departure:31/10/2025TANYT&leg2=from:xwa,to:sea,departure:07/11/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"DL"}}]) - ![United](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_UA.svg) United [](https://www.expedia.ca/Flights-Search?leg1=from:sea,to:xwa,departure:31/10/2025TANYT&leg2=from:xwa,to:sea,departure:07/11/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"UA"}}]) ![notification illustration](https://a.travel-assets.com/travel-assets-manager/pictogram-bex/light__notification.svg) ### Be in the know Get alerts if flight prices drop or rise\* ![deals illustration](https://a.travel-assets.com/travel-assets-manager/pictogram-bex/light__deals.svg) ### Book smarter Save up to 30% on select hotels after you book a flight\* ![trophy illustration](https://a.travel-assets.com/travel-assets-manager/pictogram-bex/light__trophy.svg) ### Earn twice Earn your airline miles on top of our rewards [Sign in](https://www.expedia.ca/login) ## Cheap flights from Seattle (SEA) to Williston (XWA) Prices were available within the past 7 days and start at CA $442 for one-way flights and for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply. All deals One way Roundtrip Flight from Seattle to Williston (SEA - XWA) route information | Origin airport | Seattle - Tacoma Intl. | | --- | --- | | Destination airport | Basin Intl. | | Distance | 1375 km | ## Seattle to Williston Flights **The easy way to book your flights from Seattle to Williston**  With Expedia, it’s simple to find and book flights to Williston from Seattle whether you’re traveling for business or pleasure. Enter your travel dates, hit search, and choose your flight from 3 airlines that cover this route. There are nonstop flights to Basin Intl., too.   Choose your preferred carrier and cabin class with the advanced search tool and select your ideal departure time. Then, if you want, you can see just nonstop or refundable flights. And if you’re traveling last minute, just enter the date to check out flights from Seattle to Williston today, tomorrow, or this week.   **Save dollars with cheap flights from Seattle - Tacoma Intl., SEA to Basin Intl., XWA**  Sort your search results by price to find great deals on your flight from Seattle to Williston—you get all your cheapest options first. Grab yourself a bargain now—the lowest price on flights to Williston from Seattle currently is just rising to .   Here are more money-saving tips:  - Fly in when flight prices are normally at their lowest  - Book about a month to 6 weeks before you travel for the best prices to Williston   - Avoid peak season and weekends when flights can cost more - Early morning and late-night flights are sometimes cheaper, so try varying your travel times  - One surefire way to save money on your flight is to book your flight and hotel together with Expedia. Sometimes, the savings are so large that the flight is basically free!  **Reasons to choose Expedia for your flight to Williston from Seattle**  Whatever your destination, budget, or reason to travel, in just one quick search, you can choose from loads of flights, airlines, and cabin classes. The filters make it quick and easy to find your ideal flights, and if you choose one of the flexible options, you won’t be charged to change your flight. So book your flight to Williston with Expedia today. ## Frequently asked questions ### How much is a flight from Sea-Tac Airport to Williston Basin Intl. Airport? > Within the past 7 days on Expedia, for flights departing within the next year, the lowest price advertised for a round-trip journey between Seattle - Tacoma Intl. Airport (SEA) and Williston Basin Intl. Airport was . Cheap tickets don't hang around, so book yours today. Prices and availability are subject to change. Additional terms apply. ### Do I need to pay a cancellation fee if I cancel my flight from Sea-Tac Airport to Williston Basin Intl. Airport? > Each airline has a different set of terms and conditions. If you decide to cancel your escape, visit our [Customer Service Portal](https://www.expedia.ca/helpcenter). ### How do I find cheap flights from Sea-Tac Airport to Williston Basin Intl. Airport that have flexible change policies? > Many carriers will allow you to move your flight without a change fee. All you pay is any additional cost for the new flight. When looking for Sea-Tac Airport to Basin Intl. Airport (XWA) flights, you'll find a "No change fees" box for you to tick. ### How many hours is the flight from Sea-Tac Airport to XWA? > The flight time from Sea-Tac Airport to XWA is about 5 hours and 9 minutes. Grab your headphones, listen to a gripping podcast and the time will whiz by. ### How far is the flight from SEA to XWA? > It's just 1,400 kilometres between Sea-Tac Airport and Williston Basin Intl. Airport. It's quite possible that you'll spend more time getting to and from the airport than you will actually flying! ### Which airlines fly direct from Sea-Tac Airport to Williston Basin Intl. Airport? > Right now, no airlines offer flights directly from SEA to XWA. You'll have to book a flight with at least one stop. To score the best price and connections, lock in your fare well in advance. ### Are Sea-Tac Airport to Williston Basin Intl. Airport flight tickets cheaper when they're purchased at the last minute? > Flight prices always go up and down, so it's no sure thing. While last-minute deals between Sea-Tac Airport and Williston Basin Intl. Airport are of course possible, it also makes sense to monitor prices well before you fly. In fact, some air carriers publish their prices up to a year prior to the departure date. Expedia is continuously updating the biggest bargains around, so keep checking back and be ready to pounce when the price is right. ## Explore a world of travel with Expedia - Lodging - Flights - Packages - Cars - Vacation Rental ### Lodging - [5 Star Hotels in Williston](https://www.expedia.ca/5Star-Williston-Hotels.s50-0-d1636.Travel-Guide-Filter-Hotels) - [Hotels near CHI St. Alexius Health - Williston Medical Center](https://www.expedia.ca/CHI-St-Alexius-Health-Williston-Medical-Center-Hotels.0-l553248634341018165-0.Travel-Guide-Filter-Hotels) - [Epping Hotels](https://www.expedia.ca/Epping-Hotels.d6360613.Travel-Guide-Hotels) - [Hotels near Fort Union Trading Post](https://www.expedia.ca/Fort-Union-Trading-Post-Hotels.0-l553248621533115664-0.Travel-Guide-Filter-Hotels) - [Vacation Homes in Springbrook](https://www.expedia.ca/Springbrook-Private-Vacation-Homes.d553248634983382294-aaPrivateVacationHomes.Travel-Guide-Accommodation) - [Aparthotels in Trenton](https://www.expedia.ca/Trenton-Apart-Hotels.d6341419-aaApartHotels.Travel-Guide-Accommodation) - 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