Cheap flights to Petroleum County

View €226 flight on Sat, 6 Jun 2026Opens in a new window

Flight 1

Flight 2

Popular airlines to Petroleum County

  • Alaska Airlines

  • Delta

  • United

  • American Airlines

  • Southwest Airlines

  • JetBlue Airways

  • Lufthansa

  • Be in the know

    Get alerts if flight prices drop or rise*

  • Book smarter

    Save up to 15% on select hotels after you book a flight*

  • Earn twice

    Earn your airline miles on top of our rewards
    Sign in

Cheap round-trip flights to Petroleum County

Prices were available within the past 7 days and start at €226 for one-way flights and €372 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Sat, 30 May - Sat, 6 Jun
FSD
Sioux Falls
BIL
Billings
€372 Return, found 1 day ago
€372
Return
found 1 day ago
Select United flight, departing Sat, 30 May from Sioux Falls to Billings, returning Sat, 6 Jun, priced at €372 found 1 day ago
United
Sat, 30 May - Sat, 6 Jun
FSD
Sioux Falls
BIL
Billings
€390 Return, found 1 day ago
€390
Return
found 1 day ago
Select United flight, departing Sat, 30 May from Sioux Falls to Billings, returning Sat, 6 Jun, priced at €390 found 1 day ago
United
Sat, 30 May - Sat, 6 Jun
FSD
Sioux Falls
BIL
Billings
€406 Return, found 1 day ago
€406
Return
found 1 day ago
Select United flight, departing Sat, 30 May from Sioux Falls to Billings, returning Sat, 6 Jun, priced at €406 found 1 day ago
United
Sat, 30 May - Sat, 6 Jun
FSD
Sioux Falls
BIL
Billings
€410 Return, found 1 day ago
€410
Return
found 1 day ago
Select United flight, departing Sat, 30 May from Sioux Falls to Billings, returning Sat, 6 Jun, priced at €410 found 1 day ago
United
Sat, 30 May - Sat, 6 Jun
FSD
Sioux Falls
BIL
Billings
€428 Return, found 1 day ago
€428
Return
found 1 day ago
Select United flight, departing Sat, 30 May from Sioux Falls to Billings, returning Sat, 6 Jun, priced at €428 found 1 day ago
United
Sat, 30 May - Sat, 6 Jun
FSD
Sioux Falls
BIL
Billings
€445 Return, found 1 day ago
€445
Return
found 1 day ago
Select United flight, departing Sat, 30 May from Sioux Falls to Billings, returning Sat, 6 Jun, priced at €445 found 1 day ago
American Airlines
Sat, 30 May - Sat, 6 Jun
FSD
Sioux Falls
BIL
Billings
€484 Return, found 1 day ago
€484
Return
found 1 day ago
Select American Airlines flight, departing Sat, 30 May from Sioux Falls to Billings, returning Sat, 6 Jun, priced at €484 found 1 day ago
Delta
Thu, 25 Jun - Mon, 29 Jun
AUS
Austin
BIL
Billings
€618 Return, found 16 hours ago
€618
Return
found 16 hours ago
Select Delta flight, departing Thu, 25 Jun from Austin to Billings, returning Mon, 29 Jun, priced at €618 found 16 hours ago
Lufthansa
Fri, 6 Nov - Sun, 8 Nov
DUB
Dublin
BIL
Billings
€924 Return, found 4 days ago
€924
Return
found 4 days ago
Select Lufthansa flight, departing Fri, 6 Nov from Dublin to Billings, returning Sun, 8 Nov, priced at €924 found 4 days ago
Air Canada
Fri, 6 Nov - Sun, 8 Nov
DUB
Dublin
BIL
Billings
€924 Return, found 4 days ago
€924
Return
found 4 days ago
Select Air Canada flight, departing Fri, 6 Nov from Dublin to Billings, returning Sun, 8 Nov, priced at €924 found 4 days ago

Trending flights to Petroleum County

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

Lufthansa
Fri, 6 Nov - Sun, 8 Nov
DUB
Dublin
BIL
Billings
€924 Return, found 4 days ago
€924
Return
found 4 days ago
Select Lufthansa flight, departing Fri, 6 Nov from Dublin to Billings, returning Sun, 8 Nov, priced at €924 found 4 days ago

Frequently asked questions

How do I find cheap flights to Petroleum County that have flexible change policies?
Search for low-cost flights to Petroleum County, then mark the "No change fee" box underneath the "Flexible change policies" subheading. It really is that simple. We understand that travel plans can change and flexibility is important, so book with confidence with Expedia.
Which airlines fly to Petroleum County?
Reserve your seat with one of these airlines and Petroleum County will be yours to discover:

  • Cape Air - 395 flights to or near Petroleum County each month, including 395 flights to Logan Intl. Airport (BIL) per month.
  • United Airlines - 121 flights to or near Petroleum County each month, including 121 flights to Logan Intl. Airport (BIL) per month.
  • Delta Air Lines - 117 flights to or near Petroleum County each month, including 117 flights to Logan Intl. Airport (BIL) per month.

How can I find cheap tickets to Petroleum County?
For an unbeatable deal to Petroleum County, book well ahead of time. Also think about using Expedia's handy "flexible dates" link above your search results. This will compare prices for similar time frames. In the last seven days, €372 was the lowest price for a flight to Petroleum County.
How much is a flight to Petroleum County?
You could have locked in a return ticket to Petroleum County from anywhere between €372 and €924 in the last seven days. For one-way trips leaving from Sioux Falls (FSD), the lowest price during this time was just €226.
What are the most popular airports to fly into in Petroleum County?
Petroleum County's main entry point is Logan Intl. Airport (BIL). Get your amazing journey underway by locking in an airfare on one of the 807 monthly flights to this destination.
How much is a plane ticket to Petroleum County?
In the last seven days, plane tickets to Petroleum County cost between €372 and €924. Prices usually rise as your travel date nears, so grab a cheap flight today.
What months are the cheapest to book a flight to Petroleum County?
To secure a fabulous deal to Petroleum County, book sometime in February when the price of airfares are at their cheapest. When's the most expensive? In the U.S, it's December.

Book with confidence

About Petroleum County

Expedia offers flights to Petroleum County to meet every traveller's needs. Whatever your flight need - Expedia has the flight for you. So choose from flights to Petroleum County or destinations around the world and discover how easy it is to make your flight reservations on Expedia.
About Petroleum County
*Available to Expedia members.