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Flights from Portland to Williston

Flight deals from Portland to Williston

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

  • Round-trip
  • One way

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

Flight Information from Portland to Williston

Cheapest one-way flight price £168
Off-season travel month May
Peak season for travel March
Flight distance 1,465.04km
Popular airline American Airlines

Find the best time to fly from Portland to Williston

We monitor flight fares to help you find the best deals effortlessly

Cheapest flights
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  • Jun

    25 1
  • 1 8
  • 8 15
  • 15 22
  • 22 29

  • Jul

    29 6
  • 6 13
  • 13 20
  • 20 27

  • Aug

    27 3
  • 3 10
  • 10 17
Displayed prices are calculated based on the cheapest average weekly prices of the corresponding route on Trip.com.

FAQ

  • When are flight tickets from Portland (PDX) to Williston (ISN) the cheapest?

    Airlines adjust prices for flights from Portland to Williston based on the date and time of your booking. By analyzing data from all airlines, on Trip.com, you can find the cheapest flight prices on Tuesdays, Wednesdays, and Saturdays.

  • How much are flights from Portland (PDX) to Williston (ISN) cost?

    According to Trip.com's data, the lowest price is around £306.

  • How many airports in Williston (ISN)?

    There are 2 airport(s) in Williston (ISN): Sloulin Field International Airport and Williston Basin International Airport.

How to find a cheap flight from Portland 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 Portland to Williston. Book your flights at the right time and save more.
1
Be flexible with your travel dates to get the cheapest flight from Portland to Williston.
Simply tap "Date" on the flight search bar to browse through the calendar and check out airfare from Portland to Williston over the next 6 months in 2025. If you're planning to fly within the next three months, it looks like the most affordable option is on Sat, Jun 7, with one-way flights priced at just £169.
2
Compare cheap flight deals from Portland to Williston across hundreds of airlines.
With our extensive search, you can compare prices from over 500 airlines to find the cheapest flight tickets from Portland to Williston. The cheapest airline for this route is Delta Air Lines.
3
Set up a Price Alert
By setting up a Price Alert for your journey from Portland to Williston, you can easily keep an eye on ticket prices without having to check every day.
4
Don't miss out on cheap flight deals and promo codes from Portland to Williston.
You can always find the latest offers through Trip.com Deals and Promo Codes for cheap flights. By signing up for a free membership, you'll get access to even more deals for your flights.
5
Book early or wait until the last minute.
It's usually best to book early. Flight tickets are often cheapest when they're first released, typically about a year before the departure date. So, have a look online as soon as the flights you're interested in become available. If you miss the cheapest time, you might still find some good deals as the departure date gets closer.
6
Search for flights on the go.
For the best travel flight booking experience, download the Trip.com app. You can search for cheap flights from Portland to Williston and snag some exclusive deals just for you.

More Travel Options

  • Top Routes from Portland
  • Top Routes to Williston
  • Popular Airlines