Cheap Flights to Williams County from $50

View $50 flight on Sat, Mar 14, 2026Opens in a new window

Popular airlines to Williams County

  • United

  • Delta

  • Cape Air

  • Be in the know

    Get alerts if flight prices drop or rise*

  • Book smarter

    Save up to 30% on select hotels after you book a flight*

  • Earn twice

    Earn your airline miles on top of our OneKeyCash
    Learn about One Key

How much is the cheapest flight to Williams County?

Prices were available within the past 7 days and start at $50 for one-way flights and $94 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Cape Air
Mon, Sep 21 - Tue, Sep 29
BIL
Billings
SDY
Sidney
$100 Roundtrip, found 4 hours ago
$100
Roundtrip
found 4 hours ago
Select Cape Air flight, departing Mon, Sep 21 from Billings to Sidney, returning Tue, Sep 29, priced at $100 found 4 hours ago
Cape Air
Sat, Mar 7 - Mon, Mar 9
BIL
Billings
SDY
Sidney
$110 Roundtrip, found 5 hours ago
$110
Roundtrip
found 5 hours ago
Select Cape Air flight, departing Sat, Mar 7 from Billings to Sidney, returning Mon, Mar 9, priced at $110 found 5 hours ago
Cape Air
Sat, Mar 7 - Mon, Mar 9
BIL
Billings
SDY
Sidney
$120 Roundtrip, found 5 hours ago
$120
Roundtrip
found 5 hours ago
Select Cape Air flight, departing Sat, Mar 7 from Billings to Sidney, returning Mon, Mar 9, priced at $120 found 5 hours ago
Cape Air
Sat, Mar 14 - Wed, Mar 18
BIL
Billings
SDY
Sidney
$130 Roundtrip, found 11 hours ago
$130
Roundtrip
found 11 hours ago
Select Cape Air flight, departing Sat, Mar 14 from Billings to Sidney, returning Wed, Mar 18, priced at $130 found 11 hours ago
Delta
Thu, May 28 - Tue, Jun 9
SEA
Seattle
XWA
Williston
$258 Roundtrip, found 1 day ago
$258
Roundtrip
found 1 day ago
Select Delta flight, departing Thu, May 28 from Seattle to Williston, returning Tue, Jun 9, priced at $258 found 1 day ago
Delta
Thu, Jun 4 - Sun, Jun 7
GEG
Spokane
XWA
Williston
$258 Roundtrip, found 1 day ago
$258
Roundtrip
found 1 day ago
Select Delta flight, departing Thu, Jun 4 from Spokane to Williston, returning Sun, Jun 7, priced at $258 found 1 day ago
Delta
Mon, May 25 - Wed, Jun 3
SEA
Seattle
XWA
Williston
$263 Roundtrip, found 1 day ago
$263
Roundtrip
found 1 day ago
Select Delta flight, departing Mon, May 25 from Seattle to Williston, returning Wed, Jun 3, priced at $263 found 1 day ago
United
Fri, May 1 - Fri, May 8
PDX
Portland
XWA
Williston
$268 Roundtrip, found 5 days ago
$268
Roundtrip
found 5 days ago
Select United flight, departing Fri, May 1 from Portland to Williston, returning Fri, May 8, priced at $268 found 5 days ago
Alaska Airlines
Mon, Nov 16 - Mon, Nov 23
PDX
Portland
SDY
Sidney
$384 Roundtrip, found 4 days ago
$384
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Mon, Nov 16 from Portland to Sidney, returning Mon, Nov 23, priced at $384 found 4 days ago
American Airlines
Thu, Oct 1 - Thu, Oct 22
IAH
Houston
SDY
Sidney
$496 Roundtrip, found 6 days ago
$496
Roundtrip
found 6 days ago
Select American Airlines flight, departing Thu, Oct 1 from Houston to Sidney, returning Thu, Oct 22, priced at $496 found 6 days ago

The Annual Vacation Sale

Members save up to 40% on hotels and homes. Plan this year’s big trip and save.
Book now

Airports in Williams County

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Williston, ND (XWA-Basin Intl.) XWA. Cheapest option available. Flights from $412
XWA
Williston, ND (XWA-Basin Intl.)
Cheapest
Flights from $412

Trending flights to Williams County

These prices were available within the past 7 days. Prices quoted are per person, round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Cape Air
Tue, Mar 24 - Tue, Mar 24
BIL
Billings
SDY
Sidney
$94 Roundtrip, found 1 day ago
$94
Roundtrip
found 1 day ago
Select Cape Air flight, departing Tue, Mar 24 from Billings to Sidney, returning Tue, Mar 24, priced at $94 found 1 day ago

Frequently asked questions

How do I find cheap flights to Williams County that have flexible change policies?
When it comes to flying these days, flexibility is crucial. That's why we've added a "No change fee" search function to help you track down cheap and flexible tickets to Williams County. It's at the top left of your screen just below the "Flexible change policies" heading.
Which airlines fly to Williams County?
Choose from these two respected airlines that have flights to or near Williams County:

  • United Airlines - 82 flights to or near Williams County each month, including 82 flights to Basin Intl. Airport (XWA) per month.
  • Delta Air Lines - 52 flights to or near Williams County each month, including 52 flights to Basin Intl. Airport (XWA) per month.

How can I find cheap tickets to Williams County?
Start searching as early as possible, fly in or out of nearby airports, avoid vacation periods — you're not short of ways! Another one is to use Expedia's "flexible dates" function. Search for your Williams County flight, then compare the cheapest prices for nearby dates. In the last seven days, the lowest price for a flight to Williams County was $94.
How much is a flight to Williams County?
One-way trips departing from Billings (BIL) sold for just $50 in the last seven days. During this period, the cost of a round-trip journey to Williams County ranged between $94 and $496. If you spot a bargain ticket, book quickly — these fares don't hang around for long.
What are the most popular airports to fly into in Williams County?
The primary gateway to Williams County, around 134 flights cruise into Basin Intl. Airport (XWA) every month. Search for an unbeatable deal, book your ticket and prepare to soak up the best of this wonderful region.
When is the cheapest time to fly to Williams County?
Fly out on a Tuesday to raise your chances of picking up the cheapest fare to Williams County. Mondays are usually the next most affordable day to depart. Saturday is normally the costliest day to fly anywhere.
How much is a plane ticket to Williams County?
In the last seven days, airfares to Williams County varied from $94 to $496.
What months are the cheapest to book a flight to Williams County?
To land a bargain flight to Williams County, try to book during the month of February when the price of tickets are at their lowest. What time of year is expensive? In the U.S, it's the month of December.
What is the best time to go to Williams County?
July, September and October are popular months to discover Williston, one of Williams County's most interesting cities. Summer here begins June 20. Temperatures vary from 60ºF to 80ºF at this time of year, so visit around then if you're looking for warmer weather.

Book with confidence

Enjoy extra legroom, flight flexibility, and a seamless travel experience.

Travel information

*Flight schedules are subject to change.

*Flight schedules are subject to change.

Explore a world of travel with Expedia

*Available to One Key members.