Cheap Flights to Petroleum County from $61 (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, Nov 13 - Mon, Nov 16
AZA
Phoenix - Mesa Gateway
BIL
Logan Intl.
$96 Roundtrip, found 4 days ago
$96
Roundtrip
found 4 days ago
Select Allegiant Air flight, departing Fri, Nov 13 from Phoenix - Mesa Gateway to Logan Intl., returning Mon, Nov 16, priced at $96 found 4 days ago
Fri, Nov 6 - Mon, Nov 9
AZA
Phoenix - Mesa Gateway
BIL
Logan Intl.
$109 Roundtrip, found 1 day ago
$109
Roundtrip
found 1 day ago
Select Allegiant Air flight, departing Fri, Nov 6 from Phoenix - Mesa Gateway to Logan Intl., returning Mon, Nov 9, priced at $109 found 1 day ago
Fri, Nov 20 - Fri, Nov 27
AZA
Phoenix - Mesa Gateway
BIL
Logan Intl.
$116 Roundtrip, found 12 hours ago
$116
Roundtrip
found 12 hours ago
Select Allegiant Air flight, departing Fri, Nov 20 from Phoenix - Mesa Gateway to Logan Intl., returning Fri, Nov 27, priced at $116 found 12 hours ago
Fri, Oct 30 - Mon, Nov 2
AZA
Phoenix - Mesa Gateway
BIL
Logan Intl.
$124 Roundtrip, found 1 day ago
$124
Roundtrip
found 1 day ago
Select Allegiant Air flight, departing Fri, Oct 30 from Phoenix - Mesa Gateway to Logan Intl., returning Mon, Nov 2, priced at $124 found 1 day ago
Sat, Feb 20 - Sat, Feb 27
SEA
Seattle - Tacoma Intl.
BIL
Logan Intl.
$227 Roundtrip, found 1 day ago
$227
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Sat, Feb 20 from Seattle - Tacoma Intl. to Logan Intl., returning Sat, Feb 27, priced at $227 found 1 day ago
Sat, Jan 9 - Sat, Jan 16
PDX
Portland Intl.
BIL
Logan Intl.
$247 Roundtrip, found 2 days ago
$247
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Sat, Jan 9 from Portland Intl. to Logan Intl., returning Sat, Jan 16, priced at $247 found 2 days ago
Sat, Oct 10 - Tue, Oct 20
SEA
Seattle - Tacoma Intl.
BIL
Logan Intl.
$260 Roundtrip, found 3 days ago
$260
Roundtrip
found 3 days ago
Select Delta flight, departing Sat, Oct 10 from Seattle - Tacoma Intl. to Logan Intl., returning Tue, Oct 20, priced at $260 found 3 days ago
Wed, Oct 14 - Sun, Oct 25
PDX
Portland Intl.
BIL
Logan Intl.
$286 Roundtrip, found 20 hours ago
$286
Roundtrip
found 20 hours ago
Select United flight, departing Wed, Oct 14 from Portland Intl. to Logan Intl., returning Sun, Oct 25, priced at $286 found 20 hours ago
OriginDestinationTravel DatesFlights From*
BILGlasgowSeptember 28 to October 1$101
SEABillingsOctober 10 to October 20$230
SLCBillingsOctober 21 to October 24$317
BOIBillingsOctober 9 to October 17$338
BWIBillingsNovember 12 to November 16$389
SEAGlasgowOctober 3 to October 7$430
BOIGlasgowSeptember 27 to October 1$1,317
*Prices include taxes and fees
OriginDestinationTravel DatesFlights From*
BWIBillingsSeptember 19 to September 20$483
SEABillingsSeptember 20 to September 25$559
BOIBillingsSeptember 20 to September 21$613
SLCBillingsSeptember 18 to October 20$871
*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.
Opens in a new windowHarry's House....Simple Sleeping
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Montana Country Retreat w/ Hot Tub-Near Lewistown

Montana Country Retreat w/ Hot Tub-Near Lewistown

Grass Range MT
Stay at this vacation home in Grass Range. Enjoy free WiFi, a garden, and laundry facilities.
10/10 Exceptional! (4 reviews)
"Gorgeous home and very clean! The host was so kind and accommodating for us. We got to see many deer and prong horn! The neighbor even gave us a great spot to see Elk and it was amazing!!"

Reviewed on Aug 7, 2026

Opens in a new windowMontana Country Retreat w/ Hot Tub-Near Lewistown
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 $96 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. $96 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 $96 and $1,317 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.