BIL - STL

$292 Find Cheap Flights from Billings to St. Louis - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Billings to St. Louis departing on 8/21. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$379
United Airlines
Fri 8/7Tue 8/11
BIL - STL • 1 stop
Cheapest one-way
$292
Alaska Airlines
Fri 8/21
BIL - STL • 1 stop
Top airlines
Cheapest • from $379 (round-trip)
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
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Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Billings and St. Louis. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $420 (round-trip)
Shortest trip • 4h 36m (one-way)
Insights
Insights
Insights
Insights
When to travel
Cheapest • 100% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to St. Louis!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Billings to St. Louis (BIL-STL)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Billings to St. Louis that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Billings to St. Louis

Fri, Aug 7 - Tue, Aug 11
United Airlines Logo
6:00 pm - 11:57 pm
BIL
-
STL
4h 57m
1 stop
United Airlines Logo
4:40 pm - 10:07 pm
STL
-
BIL
6h 27m
1 stop
$379United Airlines
Sat, Oct 31 - Wed, Nov 4
United Airlines Logo
10:30 am - 4:57 pm
BIL
-
STL
5h 27m
1 stop
United Airlines Logo
4:39 pm - 10:30 pm
STL
-
BIL
6h 51m
1 stop
$419United Airlines
Sat, Oct 31 - Wed, Nov 4
United Airlines Logo
7:00 am - 12:38 pm
BIL
-
STL
4h 38m
1 stop
United Airlines Logo
9:40 am - 9:14 pm
STL
-
BIL
12h 34m
2 stops
$424United Airlines
Sat, Oct 31 - Wed, Nov 4
United Airlines Logo
5:00 am - 12:38 pm
BIL
-
STL
6h 38m
1 stop
United Airlines Logo
11:38 am - 10:30 pm
STL
-
BIL
11h 52m
2 stops
$424United Airlines
Fri, Sep 25 - Mon, Sep 28
American Airlines Logo
12:28 pm - 10:20 am
BIL
-
STL
20h 52m
1 stop
American Airlines Logo
5:18 pm - 11:57 am
STL
-
BIL
19h 39m
1 stop
$486American Airlines
Fri, Sep 25 - Mon, Sep 28
Alaska Airlines Logo
3:42 pm - 5:10 pm
BIL
-
STL
24h 28m
1 stop
Alaska Airlines Logo
3:19 pm - 3:02 pm
STL
-
BIL
24h 43m
2 stops
$573Alaska Airlines
Fri, Sep 25 - Mon, Sep 28
Alaska Airlines Logo
3:42 pm - 2:21 pm
BIL
-
STL
21h 39m
2 stops
Alaska Airlines Logo
6:08 pm - 11:40 am
STL
-
BIL
18h 32m
2 stops
$623Alaska Airlines
Booking Insights

KAYAK's insights & trends for Billings to St. Louis flights

Get data-powered insights and trends into flights from Billings to St. Louis to help you find the cheapest flights, the best time to fly and much more.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Billings to St. Louis, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Billings to St. Louis is February, where tickets cost $0 (return) on average. On the other hand, the most expensive months are November and October, where the average cost of round-trip tickets is $819 and $665 respectively.

Good to know

Low season

May

Cheapest flight

$292
Best time to beat the crowds with an average 49% drop in price.
Most popular time to fly and prices are also 49% lower on average.
Flight from Billings to St. Louis

When to book flights from Billings to St. Louis

Are your dates flexible? Find out the best times to travel from Billings to St. Louis based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Billings to St. Louis

  • What is the cheapest flight from Billings to St. Louis?

    In the last 5 days, the lowest price for a flight from Billings to St. Louis was $292 for a one-way ticket and $379 for a round-trip.

  • Do I need a passport to fly between Billings and St. Louis?

    No

  • Which aircraft models fly most regularly from Billings to St. Louis?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Billings to St. Louis?

    Star Alliance is the only airline alliance operating flights between Billings and St. Louis.

  • How does KAYAK find such low prices on flights from Billings to St. Louis?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Billings to St. Louis.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Billings to St. Louis?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to St. Louis from Billings is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Billings to St. Louis?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to St. Louis with an airline and back to Billings with another airline. Booking your flights between Billings and STL can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Billings to St. Louis?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to St. Louis from Billings up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Billings to St. Louis

 
See real verified KAYAK customer reviews for airlines flying from Billings to St. Louis. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Billings to St. Louis? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.4
United AirlinesOverall score based on 10049 reviews
6.6Food
8.1Crew
7.1Entertainment
7.7Boarding
7.3Comfort
Airline reviews

Flight was delayed “due to earlier delays of that plane”, so we were nearly three hours late.

8.0 ExcellentTodd, Jul 2026
DEN - STL
Read more United Airlines reviews

Flight was delayed “due to earlier delays of that plane”, so we were nearly three hours late.

Crew was amazing, takeoff wonderful. The bathroom was disgusting from before takeoff the odor made the flight uncomfortable as you could smell the bathroom from the center of the plane where we were sitting. Smelled like raw sewage. My daughter was throwing up as we landed due to the smell and horrible turbulence as we approached Newark.

No complaints other than luggage carousel was incorrectly guiding passengers to the wrong carousel on the screen.

Airport terminal was outdated, flight was on a small jet with no wifi

Essy to get on. The hostess gave very little pop, the plane was late getting in, and we are still waiting for our bags. This sucks. :/

Lately I like the planes have been exceptionally filthy. There’s lines of dust and dirt all across the ceiling in the vents, and the cracks in between the seats are literally full of food. It’s definitely not the quality of service that I was used to with United. I’m also very disappointed with the Wi-Fi! All I wanna do is knock out a few work jobs while I’m trapped in my seat And it spools so bad. They did provide me with a refund, but the process of getting that refund is so complicated. It’s unfortunate.

Excellent flight. Smooth, efficient boarding. Quick flight. Arrived early at STL.

Short flight - no food understandable. Flight was delayed for over an hour. Overall, it was good.

We boarded and buckled and then deplaned due to no pilot. Had to wait over 3 hours for a new pilot. Not weather related, just poor management.

Last minute gate change nearly caused us to miss our flight. Change was not announced or displayed in the main board at the old gate. Terrible communication. When we landed we had to wait 20 minutes because there was another plane at the assigned gate. Not the crew’s fault, but adding 20 minutes to a 45 minute flight sucked.

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

Information on your arrival and departure airports