What are the cheapest airlines flying from St. Louis to Billings round-trip?

American Airlines, at $290, was found to be the cheapest airline from St. Louis to Billings.Alternate airlines to your destination round-trip include United Airlines and Delta. American Airlines is currently priced 39% below the average price you’ll pay for this route.

What are the cheapest airlines to fly from St. Louis to Billings one-way?

For one-way options, check prices for American Airlines. According to our data, you can fly for as low as $157. Users have also found prices from $261 and $266 on United Airlines and Delta, respectively.

What is the cheapest day to fly from St. Louis to Billings?

Travelers seeking maximum savings on their St. Louis to Billings flight should consider departing on Saturday mornings when fares are most often at their lowest. Friday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

In terms of precipitation, rainfall in Billings ranges from 0.5 - 2.2 inches per month. May is typically the wettest month, when rainfall can reach 2.2 in. January is typically the driest time to visit Billings when rainfall is around 0.5 in.

If weather is an important factor for your trip to Billings, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 26.6 F).

What are the most popular airlines that fly from St. Louis to Billings?

Before booking your flight from St. Louis to Billings check out the most popular airlines for this route: American Airlines, Delta or United Airlines.

What is the cheapest day to fly round-trip from St. Louis to Billings?

Users have found that leaving on a Monday can be a cost-effective option. It’s possible to save up to 31% on your flight compared to booking on days when demand is much higher.

What is the cheapest month to fly from St. Louis to Billings?

Due to multiple factors, expect to potentially pay more when booking in May. For low rates, January can be a great choice for travel to Billings. Flights to Billings from St. Louis in January are about $479 on average during January, but can be found for as low as $261.

What is the cheapest time of day to fly from STL to BIL?

One of the essential ways to save on airfare from St. Louis to Billings is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the afternoon could potentially save you up to 34% on airfare.

Can I find deals for flights from St. Louis to Billings that include hotel bookings?

Yes. In addition to deals on St. Louis to Billings flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from St. Louis to Billings?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Billings.

Can I find deals for business class flights from St. Louis to Billings?

Yes. Cheapflights offers flight deals from St. Louis to Billings by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$157+ Flights from St. Louis to Billings

Q: How much does it cost to fly round-trip from St. Louis to Billings?

Airfare is typical for this route at the moment. St. Louis to Billings flights typically cost between $273 and $542 in September. The cheapest round-trip price found within the last 3 days was $290 on American Airlines (Sep 3-Sep 10).

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Cheap flight deals from St. Louis to Billings

Round-trip from	$290 (American Airlines)
One-way from	$157 (American Airlines)
Popular in	May
Cheapest in	January
Average price	$516

From Lambert-St Louis to Billings Logan Intl

Search Deals

One-way flight from Lambert-St Louis to Billings Logan Intl

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Highest demand for flights based on searches. 13% potential increase in price ($73 potential increase over avg. RT price).

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Cheapest flight prices on average. 4% potential price decrease ($20 potential savings vs. average RT price).

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Average for round-trip flights in July 2025

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Find flight deals from St. Louis to Billings

Cheapest flights from St. Louis to Billings
Explore the most affordable flight options available from St. Louis to Billings. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2025.

Wed 9/39:56 amSTL - BIL

1 stop12h 01mAmerican Airlines

Wed 9/1012:19 pmBIL - STL

1 stop8h 34mAmerican Airlines

Deal found 7/28

$290

Thu 8/215:15 amSTL - BIL

1 stop5h 29mUnited Airlines

Mon 8/255:57 pmBIL - STL

1 stop4h 56mUnited Airlines

Deal found 7/28

$313

Sat 9/610:15 amSTL - BIL

2 stops13h 57mDelta

Tue 9/96:25 amBIL - STL

2 stops11h 35mDelta

Deal found 7/29

$323

Fri 9/126:30 pmSTL - BIL

2 stops19h 54mAlaska Airlines

Mon 9/157:18 pmBIL - STL

1 stop18h 21mAlaska Airlines

Deal found 7/29

$409

Tue 8/53:24 pmSTL - BIL

1 stop9h 44mHawaiian Airlines

Tue 8/122:03 pmBIL - STL

1 stop8h 56mHawaiian Airlines

Deal found 7/29

$831

Best flights from St. Louis to Billings
Discover carefully curated flight deals from St. Louis to Billings that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 29, 2025.

Wed 9/39:56 amSTL - BIL

1 stop12h 01mAmerican Airlines

Wed 9/1012:19 pmBIL - STL

1 stop8h 34mAmerican Airlines

Deal found 7/28

$290

Thu 8/215:15 amSTL - BIL

1 stop5h 29mUnited Airlines

Mon 8/255:57 pmBIL - STL

1 stop4h 56mUnited Airlines

Deal found 7/28

$313

Sat 9/610:15 amSTL - BIL

2 stops13h 57mDelta

Tue 9/96:25 amBIL - STL

2 stops11h 35mDelta

Deal found 7/29

$323

Fri 9/126:30 pmSTL - BIL

2 stops19h 54mAlaska Airlines

Mon 9/157:18 pmBIL - STL

1 stop18h 21mAlaska Airlines

Deal found 7/29

$409

Last-minute flights from St. Louis to Billings
Discover last-minute flight deals from St. Louis to Billings. Data last updated July 29, 2025 and is based on user searches.

Tue 8/53:24 pmSTL - BIL

1 stop9h 44mHawaiian Airlines

Tue 8/122:03 pmBIL - STL

1 stop8h 56mHawaiian Airlines

Deal found 7/29

$831

Tue 8/56:14 amSTL - BIL

2 stops18h 54mAlaska Airlines

Tue 8/122:03 pmBIL - STL

1 stop8h 56mAlaska Airlines

Deal found 7/29

$1,019

Thu 8/215:15 amSTL - BIL

1 stop5h 29mUnited Airlines

Mon 8/255:57 pmBIL - STL

1 stop4h 56mUnited Airlines

Deal found 7/28

$313

Sat 8/235:30 pmSTL - BIL

1 stop6h 32mDelta

Sun 8/316:25 amBIL - STL

1 stop7h 05mDelta

Deal found 7/27

$346

Mon 8/256:30 pmSTL - BIL

2 stops19h 54mAlaska Airlines

Mon 9/13:43 pmBIL - STL

2 stops45h 56mAlaska Airlines

Deal found 7/28

$689

Tue 8/266:06 amSTL - BIL

1 stop13h 45mAmerican Airlines

Tue 9/25:49 amBIL - STL

1 stop15h 28mAmerican Airlines

Deal found 7/29

$309

One-way flights from St. Louis to Billings
Search for one-way flight options from St. Louis to Billings. Find affordable one-way fares based on user searches. Data last updated July 29, 2025.

Sun 9/146:05 amSTL - BIL

1 stop6h 44mAmerican Airlines

Deal found 7/26

$157

Sun 9/1412:05 pmSTL - BIL

3 stops33h 38mMultiple Airlines

Deal found 7/26

$234

Wed 8/134:45 pmSTL - BIL

1 stop7h 02mUnited Airlines

Deal found 7/29

$261

Wed 8/132:15 pmSTL - BIL

2 stops9h 55mDelta

Deal found 7/29

$266

Sun 9/146:20 amSTL - BIL

2 stops32h 04mAlaska Airlines

Deal found 7/26

$394

Fly from

Fly to

Route

Depart

Return

Price

St. LouisBillings

STL - BIL

STLBIL

Lambert-St Louis

Wed 9/3

9:56 am-8:57 pm

1 stop12h 01m

Billings Logan Intl

Wed 9/10

12:19 pm-9:53 pm

1 stop8h 34m

$290

St. LouisBillings

STL - BIL

STLBIL

Lambert-St Louis

Thu 8/21

5:15 am-9:44 am

1 stop5h 29m

Billings Logan Intl

Mon 8/25

5:57 pm-11:53 pm

1 stop4h 56m

$313

St. LouisBillings

STL - BIL

STLBIL

Lambert-St Louis

Sat 9/6

10:15 am-11:12 pm

2 stops13h 57m

Billings Logan Intl

Tue 9/9

6:25 am-7:00 pm

2 stops11h 35m

$323

St. LouisBillings

STL - BIL

STLBIL

Lambert-St Louis

Fri 9/12

6:30 pm-1:24 pm

2 stops19h 54m

Billings Logan Intl

Mon 9/15

7:18 pm-2:39 pm

1 stop18h 21m

$409

St. LouisBillings

STL - BIL

STLBIL

Lambert-St Louis

Sun 9/14

6:05 am-11:49 am

1 stop6h 44m

$157

St. LouisBillings

STL - BIL

STLBIL

Lambert-St Louis

Sun 9/14

12:05 pm-8:43 pm

3 stops33h 38m

$234

St. LouisBillings

STL - BIL

STLBIL

Lambert-St Louis

Wed 8/13

4:45 pm-10:47 pm

1 stop7h 02m

$261

St. LouisBillings

STL - BIL

STLBIL

Lambert-St Louis

Wed 8/13

2:15 pm-11:10 pm

2 stops9h 55m

$266

St. LouisBillings

STL - BIL

STLBIL

Lambert-St Louis

Sun 9/14

6:20 am-1:24 pm

2 stops32h 04m

$394

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/26

Best time to book a flight from St. Louis to Billings

Have a flexible travel schedule? Discover the best time to fly to Billings from St. Louis with our price prediction graph.

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from St. Louis to Billings

What is the cheapest month to book a flight from St. Louis to Billings?

Currently, January is the cheapest month in which you can book a flight from St. Louis to Billings (average of $396). Flying from St. Louis to Billings in June is currently the most expensive (average of $512). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

How much does it cost to fly round-trip from St. Louis to Billings?

Reviews of airlines servicing Billings

Get a feel of what it's like to fly with Alaska Airlines, Delta, and United Airlines from St. Louis to Billings by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Alaska Airlines

8.0

Very good

10,000 reviews

Reviews

1 / 20

10.0

Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.

Alaska Airlines

8.0

Very good

10,000 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

Reviews

1 / 20

10.0

Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.

Delta

8.0

Very good

7,977 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

Reviews

1 / 20

10.0

Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.

United Airlines

7.4

Good

8,899 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

Reviews

1 / 20

10.0

Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.

American Airlines

7.2

Good

10,000 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

Reviews

1 / 20

10.0

Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.

Related info for your journey

What are the cheapest airlines flying from St. Louis to Billings round-trip?
American Airlines, at $290, was found to be the cheapest airline from St. Louis to Billings.Alternate airlines to your destination round-trip include United Airlines and Delta. American Airlines is currently priced 39% below the average price you’ll pay for this route.
What are the cheapest airlines to fly from St. Louis to Billings one-way?
For one-way options, check prices for American Airlines. According to our data, you can fly for as low as $157. Users have also found prices from $261 and $266 on United Airlines and Delta, respectively.
Can I find deals for flights from St. Louis to Billings that include hotel bookings?
Yes. In addition to deals on St. Louis to Billings flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from St. Louis to Billings?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Billings.
Can I find deals for business class flights from St. Louis to Billings?
Yes. Cheapflights offers flight deals from St. Louis to Billings by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from St. Louis to Billings?
Currently, January is the cheapest month in which you can book a flight from St. Louis to Billings (average of $396). Flying from St. Louis to Billings in June is currently the most expensive (average of $512). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Other flights to Billings

Top 3 airlines flying from St. Louis to Billings

Airline	Cheapest	Average	Flexibility	On-time
Delta	Cheapest$258	Average$375	FlexibilityNo cancel fee	On-timeN/A
American Airlines	Cheapest$268	Average$428	FlexibilityNo cancel fee	On-time71%
United Airlines	Cheapest$278	Average$534	FlexibilityNo cancel fee	On-time69%

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$157+ Cheap flights from St. Louis to Billings (STL - BIL)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/14. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from St. Louis to Billings with Cheapflights

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Cheap flight deals from St. Louis to Billings

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from St. Louis to Billings

Cheapest flights from St. Louis to BillingsExplore the most affordable flight options available from St. Louis to Billings. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2025.

Explore the most affordable flight options available from St. Louis to Billings. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from St. Louis to Billings that are best for you.

Best time to book a flight from St. Louis to Billings

Have a flexible travel schedule? Discover the best time to fly to Billings from St. Louis with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from St. Louis to Billings

What is the cheapest month to book a flight from St. Louis to Billings?

How much does it cost to fly round-trip from St. Louis to Billings?

Reviews of airlines servicing Billings

Get a feel of what it's like to fly with Alaska Airlines, Delta, and United Airlines from St. Louis to Billings by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Billings. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What are the cheapest airlines flying from St. Louis to Billings round-trip?

What are the cheapest airlines to fly from St. Louis to Billings one-way?

Can I find deals for flights from St. Louis to Billings that include hotel bookings?

How can I find direct flights from St. Louis to Billings?

Can I find deals for business class flights from St. Louis to Billings?

What is the cheapest month to book a flight from St. Louis to Billings?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for St. Louis to Billings

See prices for flight routes from nearby airports that may be better suited for you.

Top 3 airlines flying from St. Louis to Billings

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Cheapest flights from St. Louis to Billings
Explore the most affordable flight options available from St. Louis to Billings. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2025.