Cheap Flights to Petroleum County from $55 (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.

Sat, Nov 21 - Fri, Nov 27
AZA
Phoenix - Mesa Gateway
BIL
Logan Intl.
$90 Roundtrip, found 18 hours ago
$90
Roundtrip
found 18 hours ago
Select Allegiant Air flight, departing Sat, Nov 21 from Phoenix - Mesa Gateway to Logan Intl., returning Fri, Nov 27, priced at $90 found 18 hours ago
Fri, Sep 25 - Mon, Sep 28
AZA
Phoenix - Mesa Gateway
BIL
Logan Intl.
$102 Roundtrip, found 3 hours ago
$102
Roundtrip
found 3 hours ago
Select Allegiant Air flight, departing Fri, Sep 25 from Phoenix - Mesa Gateway to Logan Intl., returning Mon, Sep 28, priced at $102 found 3 hours ago
Fri, Oct 30 - Fri, Nov 6
AZA
Phoenix - Mesa Gateway
BIL
Logan Intl.
$103 Roundtrip, found 18 hours ago
$103
Roundtrip
found 18 hours ago
Select Allegiant Air flight, departing Fri, Oct 30 from Phoenix - Mesa Gateway to Logan Intl., returning Fri, Nov 6, priced at $103 found 18 hours ago
Fri, Sep 18 - Mon, Sep 21
AZA
Phoenix - Mesa Gateway
BIL
Logan Intl.
$109 Roundtrip, found 6 hours ago
$109
Roundtrip
found 6 hours ago
Select Allegiant Air flight, departing Fri, Sep 18 from Phoenix - Mesa Gateway to Logan Intl., returning Mon, Sep 21, priced at $109 found 6 hours ago
Fri, Sep 18 - Mon, Sep 21
AZA
Phoenix - Mesa Gateway
BIL
Logan Intl.
$116 Roundtrip, found 2 days ago
$116
Roundtrip
found 2 days ago
Select Allegiant Air flight, departing Fri, Sep 18 from Phoenix - Mesa Gateway to Logan Intl., returning Mon, Sep 21, priced at $116 found 2 days ago
Sat, Oct 31 - Sat, Nov 7
SEA
Seattle - Tacoma Intl.
BIL
Logan Intl.
$177 Roundtrip, found 1 day ago
$177
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Sat, Oct 31 from Seattle - Tacoma Intl. to Logan Intl., returning Sat, Nov 7, priced at $177 found 1 day ago
Sat, Nov 7 - Tue, Nov 10
PDX
Portland Intl.
BIL
Logan Intl.
$207 Roundtrip, found 3 hours ago
$207
Roundtrip
found 3 hours ago
Select Alaska Airlines flight, departing Sat, Nov 7 from Portland Intl. to Logan Intl., returning Tue, Nov 10, priced at $207 found 3 hours ago
Sat, Sep 5 - Sat, Sep 12
PDX
Portland Intl.
BIL
Logan Intl.
$217 Roundtrip, found 9 hours ago
$217
Roundtrip
found 9 hours ago
Select Delta flight, departing Sat, Sep 5 from Portland Intl. to Logan Intl., returning Sat, Sep 12, priced at $217 found 9 hours ago
OriginDestinationTravel DatesFlights From*
BILGlasgowSeptember 5 to September 6$101
SEABillingsOctober 31 to November 7$177
SLCBillingsSeptember 17 to September 28$259
BOIBillingsSeptember 12 to September 19$327
BWIBillingsOctober 2 to October 11$359
*Prices include taxes and fees
OriginDestinationTravel DatesFlights From*
BILGlasgowAugust 7 to August 9$101
SEABillingsAugust 8 to August 15$430
BOIBillingsAugust 8 to August 9$582
BWIBillingsAugust 7 to August 10$660
SLCBillingsAugust 7 to August 9$1,078
*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.
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! (86 reviews)
"I have stayed here before...it is a nice, quiet, cleanly place to stay. I plan to stay there again (if it is available) the next time I am in the Lewistown, MT area. MT is having a great weather situation this year....the countryside is so green still!"

Reviewed on Jul 20, 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 $90 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 November. 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. $90 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 $90 and $1,078 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.