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Flights from Seattle to Williston Starting at €185

We've found these cheap flights for you. You can book one-way or return flight tickets.

  • One way
  • Round-trip
      • SEA20:30
        25h 25m
        1 stop
        XWA23:55
        Tue, Jul 16|Seattle - Williston|Frontier Airlines
        €185€448
        59% OFF
        59% OFF
        €448€185
      • SEA20:18
        25h 37m
        1 stop
        XWA23:55
        Tue, Jul 16|Seattle - Williston|Alaska Airlines
        €235€448
        48% OFF
        48% OFF
        €448€235
      • SEA18:35
        27h 20m
        1 stop
        XWA23:55
        Tue, Jul 16|Seattle - Williston|United Airlines
        €260€448
        42% OFF
        42% OFF
        €448€260
      • SEA15:37
        6h 18m
        1 stop
        XWA23:55
        Sat, Aug 17|Seattle - Williston|United Airlines
        €322
        €322
      • SEA00:35
        9h 21m
        1 stop
        XWA11:56
        Tue, Jul 16|Seattle - Williston|Delta Air Lines
        €421
        €421
      • SEA13:00
        3h 5m
        Direct
        ISN14:00
        Mon, Jul 15|Seattle - Williston|Frontier Airlines
        Find More Flights
        Find More Flights

Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.

Find the best time to fly from Seattle to Williston

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Displayed prices are calculated based on the cheapest average weekly prices of the corresponding route on Trip.com.
Airlines Flying from Seattle to Williston

Compare prices, find the option that best suits your travel needs, and enjoy a comfortable journey with a trusted airline.

Frontier Airlines
From €185
Alaska Airlines
From €235
United Airlines
From €260
Sun Country Airlines
From €372
Delta Air Lines
From €421
ANA airlines

Find more flights and airlines

Alternative Routes from Seattle to Williston

Searching for potential routes that might be cheaper and faster? Check out these alternative flights from Seattle to Williston.

  • Cheapest
    Frontier Airlines
    SEA
    20:30
    25h 25m
    1 transfer
    XWA
    23:55
    Seattle-Tacoma International Airport - Williston Basin International Airport
    Tue, Jul 16Frontier Airlines
    €185
  • Frontier Airlines
    SEA
    20:30
    25h 25m
    1 transfer
    XWA
    23:55
    Seattle-Tacoma International Airport - Williston Basin International Airport
    Tue, Jul 16Frontier Airlines
    €185
    Find More Flights

How do I find the cheapest flights?

  • When are flight tickets from Seattle (SEA) to Williston (ISN) the cheapest?

    Airlines adjust prices for flights from Seattle to Williston based on the departure date and time of your selection. By analyzing data from all airlines, we've discovered that on Trip.com, you can find the lowest flight prices on Tuesdays, Wednesdays, and Saturdays.

  • How much do flights from Seattle (SEA) to Williston (ISN) cost?

    According to Trip.com's data, the lowest price is around €382.

  • What is the transportation method from the main airport to downtown in Williston?

    • The distance from Williston Basin International Airport to downtown is about 15km. It takes about 30 minutes by taxi.

How to find a cheap flight from Seattle to Williston

Wait until the last minute and flight costs are often sky-high. Plan ahead, book the right way, and your savings can soar. We have loads of saving tips to help you find a cheap flight from Seattle to Williston. Book your flights at the right time and save more.
1
Book Early
Once prices are gone, they're gone. Lock in deals while you can!
2
Compare Flight Prices
Compare prices on travel agency and airline websites.
3
Look Out for Deals
Check airline and travel agency websites for latest flight deals
4
Check One-way Fares
Buying two cheap one-way flights can sometimes be a better deal than a round-trip.
5
Try Different Dates
Flying during the week, early in the morning, or late at night can help save money.
6
Use the Trip.com App
Save up to £10 per person when booking your flights on Trip.com

Flight Information from Seattle to Williston

Cheapest nonstop flight price

€184

Off-season for travel

July

Peak season for travel

March

Flight distance

1,392.04km

Popular airline

Alaska Airlines

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