Cheap Flights to Petroleum County from $57 (2026/2027)

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How Much Does it Cost To Fly To Petroleum County?

Prices found within past 7 days. Prices and availability subject to change. Additional terms may apply.

Fri, Jan 15 - Fri, Jan 22
AZA
Phoenix - Mesa Gateway
BIL
Logan Intl.
$110 Roundtrip, found 2 days ago
$110
Roundtrip
found 2 days ago
Select Allegiant Air flight, departing Fri, Jan 15 from Phoenix - Mesa Gateway to Logan Intl., returning Fri, Jan 22, priced at $110 found 2 days ago
Fri, Jan 15 - Fri, Jan 22
AZA
Phoenix - Mesa Gateway
BIL
Logan Intl.
$117 Roundtrip, found 1 day ago
$117
Roundtrip
found 1 day ago
Select Allegiant Air flight, departing Fri, Jan 15 from Phoenix - Mesa Gateway to Logan Intl., returning Fri, Jan 22, priced at $117 found 1 day ago
Fri, Nov 27 - Mon, Dec 7
AZA
Phoenix - Mesa Gateway
BIL
Logan Intl.
$120 Roundtrip, found 2 days ago
$120
Roundtrip
found 2 days ago
Select Allegiant Air flight, departing Fri, Nov 27 from Phoenix - Mesa Gateway to Logan Intl., returning Mon, Dec 7, priced at $120 found 2 days ago
Fri, Jan 15 - Fri, Jan 22
AZA
Phoenix - Mesa Gateway
BIL
Logan Intl.
$125 Roundtrip, found 1 day ago
$125
Roundtrip
found 1 day ago
Select Allegiant Air flight, departing Fri, Jan 15 from Phoenix - Mesa Gateway to Logan Intl., returning Fri, Jan 22, priced at $125 found 1 day ago
Fri, Dec 11 - Mon, Dec 14
AZA
Phoenix - Mesa Gateway
BIL
Logan Intl.
$132 Roundtrip, found 1 day ago
$132
Roundtrip
found 1 day ago
Select Allegiant Air flight, departing Fri, Dec 11 from Phoenix - Mesa Gateway to Logan Intl., returning Mon, Dec 14, priced at $132 found 1 day ago
Thu, Jan 14 - Mon, Jan 18
PHX
Sky Harbor Intl.
BIL
Logan Intl.
$167 Roundtrip, found 1 day ago
$167
Roundtrip
found 1 day ago
Select Delta flight, departing Thu, Jan 14 from Sky Harbor Intl. to Logan Intl., returning Mon, Jan 18, priced at $167 found 1 day ago
Tue, Nov 17 - Tue, Nov 17
PHX
Sky Harbor Intl.
BIL
Logan Intl.
$167 Roundtrip, found 1 day ago
$167
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Tue, Nov 17 from Sky Harbor Intl. to Logan Intl., returning Tue, Nov 17, priced at $167 found 1 day ago
Wed, Dec 9 - Sat, Dec 12
SEA
Seattle - Tacoma Intl.
BIL
Logan Intl.
$217 Roundtrip, found 1 day ago
$217
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Wed, Dec 9 from Seattle - Tacoma Intl. to Logan Intl., returning Sat, Dec 12, priced at $217 found 1 day ago
OriginDestinationTravel DatesFlights From*
BILGlasgowNovember 25 to November 29$100
SEABillingsDecember 9 to December 12$217
SLCBillingsJanuary 20 to January 24$373
BOIBillingsDecember 2 to December 4$404
BWIBillingsDecember 25 to January 4$579
BOIGlasgowDecember 22 to December 28$822
*Prices include taxes and fees
OriginDestinationTravel DatesFlights From*
SEABillingsNovember 7 to November 8$740
*Prices include taxes and fees

Travelers ❤️ These Petroleum County 🏨

​The CMR Island: 80 acres Borders Refuge on 3 Sides Unit 410 Basecamp

​The CMR Island: 80 acres Borders Refuge on 3 Sides Unit 410 Basecamp

Winnett MT
Stay at this cabin in Winnett. Enjoy air conditioning.
10/10 Exceptional! (1 review)
"This is a very remote property. The surrounding area is amazingly beautiful and the wildlife is incredible. The residence has 3 bedrooms and sleeps well. The AC was helpful with the warmer temps that I experienced and the tv and WiFi were very reliable. I would definitely come back to enjoy the surroundings. ..."

Reviewed on Sep 27, 2026

Opens in a new window​The CMR Island: 80 acres Borders Refuge on 3 Sides Unit 410 Basecamp
Small Town Big Sky

Small Town Big Sky

Winnett MT
Stay at this vacation home in Winnett. Enjoy free WiFi, a garden, and laundry facilities.
9.6/10 Exceptional! (8 reviews)
"Awesome place, great for groups."

Reviewed on Jun 12, 2026

Opens in a new windowSmall Town Big Sky
Harry's House....Simple Sleeping

Harry's House....Simple Sleeping

Roy MT
Stay at this cabin in Roy. Enjoy an in-room coffeemaker and air conditioning.
9.8/10 Exceptional! (96 reviews)
"Everything was great, we never talked to the owner but the door had our code and we were able to access the property with no trouble. Very quiet neighborhood, I would recommend this if you need a room in Roy, MT."

Reviewed on Oct 19, 2026

Opens in a new windowHarry's House....Simple Sleeping
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Near Hunting: Cozy Cabin w/ Deck in Grass Range!

Near Hunting: Cozy Cabin w/ Deck in Grass Range!

3 out of 5
Grass Range MT
Stay at this cottage in Grass Range. Enjoy free parking and in-room fireplaces.
10/10 Exceptional! (2 reviews)
"Great place to stay! Great hosts and amenities!"

Reviewed on Jul 4, 2026

Opens in a new windowNear Hunting: Cozy Cabin w/ Deck in Grass Range!
Lowest nightly price found within the past 24 hours based on a 1 night stay for 2 adults. Prices and availability subject to change. Additional terms may apply.

Frequently asked questions

How much is the cheapest flight to Petroleum County?
To give you a ballpark figure, the cheapest roundtrip flight to Petroleum County was $100 during the last seven days. An excellent way to snap up a good deal is to be flexible with your dates. This price was available on Travelocity for flights to Petroleum County departing within the next year. Prices and availability are subject to change. Additional terms apply.
What is the cheapest month to fly to Petroleum County?
Splash out more money on epic adventures and less on airfares by zipping off to Petroleum County in January. This is the best-priced month to jet off to this destination according to Travelocity's direct return flight demand between January and December last year. Take a peek at our selection of flights and get out of town without breaking the bank.
How can I check my flight status to Petroleum County?
"Trips" should be your first stop when it comes to the details of your flight to Petroleum County. Travelocity's customer portal lets you handle everything in the one place, from checking the status of your flight to changing or canceling your booking. Click on Trips at the top of the Travelocity homepage and then create a new account or sign in to an existing one. Or you can download the Travelocity app and access your itinerary on the go. Whether you've got the family flying with you or you're on your own, all your travel plans are right at your fingertips.
How do I find the best deals on flights to Petroleum County?
There are a few ways — book in advance, avoid peak season and be flexible with your travel dates. If your dates aren't set in stone, search for your flight to Petroleum County on Travelocity and click on "Flexible dates" above your results. This will help you locate any cheaper fares on surrounding days. $100 was the best deal for a return flight to Petroleum County in the last seven days. This price was available on Travelocity for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
Why should I book my flight to Petroleum County with Travelocity?
Browse cheap flights to Petroleum County with Travelocity and start planning your next vacation. With round-the-clock customer support throughout every step of the process and our Price Match Guarantee, we take the difficulty out of finding cheap family flights, accommodations and more. Get your hands on a great deal today and gear up for the adventure of your dreams.
What are the most popular flight routes to Petroleum County?
To help you choose your flights to Petroleum County, here's our list of some of the preferred routes:

  • Sidney, MT (SDY-Sidney-Richland Municipal) to Logan Intl. Airport (BIL) - 1,061 flights a month.
  • Denver, CO (DEN-Denver Intl.) to Logan Intl. Airport (BIL) - 862 flights a month.
  • Salt Lake City, UT (SLC-Salt Lake City Intl.) to Logan Intl. Airport (BIL) - 637 flights a month.

How much is a flight to Petroleum County on average?
Passengers have found roundtrip flights to Petroleum County for between $100 and $822 with Travelocity in the last seven days. Whether you want to fly economy or business class, we'll help you land the best deal. These prices were available on Travelocity for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
How long is the average flight to Petroleum County?
The length of a direct flight to Petroleum County of course varies, but here's an idea of the average journey times for a selection of popular routes:

  • Sidney, MT (SDY-Sidney-Richland Municipal) to Logan Intl. Airport (BIL) - 1 hour and 35 minutes
  • Denver, CO (DEN-Denver Intl.) to Logan Intl. Airport (BIL) - 1 hour and 36 minutes
  • Salt Lake City, UT (SLC-Salt Lake City Intl.) to Logan Intl. Airport (BIL) - 1 hour and 24 minutes

What can I expect on a flight to Petroleum County?
If you have a long-haul flight to Petroleum County, you can usually expect drinks, food and entertainment on board. Airlines try to make longer flights as comfortable as possible for passengers. Brief trips — as well as flights with budget airlines — may have less inclusions. If you're chasing cheap flights for family vacations with a low-priced carrier, it's possible you'll pay extra for entertainment and food.