$167 Cheap Flights from Billings (BIL) to St. Louis (STL)

View $167 flight on Wed, Dec 31, 2025Opens in a new window

Popular airlines from Billings Logan Intl. Airport (BIL) to St. Louis Lambert Intl. Airport (STL)

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

Prices were available within the past 7 days and start at $167 for one-way flights and $333 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Tue, Dec 2 - Tue, Dec 9
BIL
Billings
STL
St. Louis
$333 Roundtrip, found 9 hours ago
$333
Roundtrip
found 9 hours ago
Select United flight, departing Tue, Dec 2 from Billings to St. Louis, returning Tue, Dec 9, priced at $333 found 9 hours ago
Delta
Sat, Jan 31 - Sun, Feb 1
BIL
Billings
STL
St. Louis
$335 Roundtrip, found 3 days ago
$335
Roundtrip
found 3 days ago
Select Delta flight, departing Sat, Jan 31 from Billings to St. Louis, returning Sun, Feb 1, priced at $335 found 3 days ago
Delta
Tue, Dec 9 - Sun, Dec 14
BIL
Billings
STL
St. Louis
$338 Roundtrip, found 1 day ago
$338
Roundtrip
found 1 day ago
Select Delta flight, departing Tue, Dec 9 from Billings to St. Louis, returning Sun, Dec 14, priced at $338 found 1 day ago
Hawaiian Airlines
Tue, Feb 3 - Thu, Feb 12
BIL
Billings
STL
St. Louis
$348 Roundtrip, found 6 days ago
$348
Roundtrip
found 6 days ago
Select Hawaiian Airlines flight, departing Tue, Feb 3 from Billings to St. Louis, returning Thu, Feb 12, priced at $348 found 6 days ago
Delta
Tue, Dec 2 - Sun, Dec 14
BIL
Billings
STL
St. Louis
$348 Roundtrip, found 4 days ago
$348
Roundtrip
found 4 days ago
Select Delta flight, departing Tue, Dec 2 from Billings to St. Louis, returning Sun, Dec 14, priced at $348 found 4 days ago
United
Thu, Dec 11 - Mon, Dec 15
BIL
Billings
STL
St. Louis
$352 Roundtrip, found 5 days ago
$352
Roundtrip
found 5 days ago
Select United flight, departing Thu, Dec 11 from Billings to St. Louis, returning Mon, Dec 15, priced at $352 found 5 days ago
United
Sat, Jan 17 - Sun, Jan 18
BIL
Billings
STL
St. Louis
$353 Roundtrip, found 1 day ago
$353
Roundtrip
found 1 day ago
Select United flight, departing Sat, Jan 17 from Billings to St. Louis, returning Sun, Jan 18, priced at $353 found 1 day ago
United
Thu, Feb 5 - Mon, Feb 9
BIL
Billings
STL
St. Louis
$356 Roundtrip, found 6 days ago
$356
Roundtrip
found 6 days ago
Select United flight, departing Thu, Feb 5 from Billings to St. Louis, returning Mon, Feb 9, priced at $356 found 6 days ago
Alaska Airlines
Thu, Dec 11 - Sat, Dec 13
BIL
Billings
STL
St. Louis
$359 Roundtrip, found 1 day ago
$359
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Thu, Dec 11 from Billings to St. Louis, returning Sat, Dec 13, priced at $359 found 1 day ago
American Airlines
Tue, Dec 2 - Tue, Dec 9
BIL
Billings
STL
St. Louis
$407 Roundtrip, found 9 hours ago
$407
Roundtrip
found 9 hours ago
Select American Airlines flight, departing Tue, Dec 2 from Billings to St. Louis, returning Tue, Dec 9, priced at $407 found 9 hours ago

Find the cheapest month to fly from Billings (BIL) to St. Louis (STL)

September is typically the cheapest month to fly

From $292 - $693 per traveler.

Alternative airports near St. Louis

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Lambert-St. Louis Intl. STL. Cheapest option available. Average driving time to city center is 20 minutes. Flights from $392
STL
Lambert-St. Louis Intl.
Cheapest
Average driving time to city center20 min
Flights from $392

Frequently asked questions

How much does a flight from Logan Intl. Airport (BIL) to Lambert-St. Louis Intl. Airport (STL) cost?
Get a cheap one-way flight from $167 or cheap return flight from $333 from Logan Intl. Airport (BIL) to Lambert-St. Louis Intl. Airport (STL) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Logan Intl. Airport (BIL) to Lambert-St. Louis Intl. Airport (STL)?
The cheapest month to fly from BIL to STL is December, when there's less demand. Off-peak months are generally when you'll find lower airfares between these airports.
What is the cheapest airline that flies from Logan Intl. Airport (BIL) to Lambert-St. Louis Intl. Airport (STL)?
Use the filter tool on Expedia to compare different airlines and find the most affordable carrier that'll take you from BIL to STL. Then, sort your results by "Price (lowest to highest)" to snap up a great deal.
How many flights per day from Logan Intl. Airport (BIL) to Lambert-St. Louis Intl. Airport (STL)?
Nonstop flights from Logan Intl. Airport (BIL) to Lambert-St. Louis Intl. Airport (STL) aren't available daily, so you'll need to take a flight with a layover. Explore your options with Expedia's filters. Enter your travel dates and select either "1 Stop" or "2+ Stops."
What day of the week has the most flights from BIL to STL?
Generally you'll find the widest variety of flight choices on a Friday. Tuesdays are often the quietest.* However, this can vary depending on the airline, season and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Logan Intl. Airport (BIL) to Lambert-St. Louis Intl. Airport (STL)?
To touch down at Lambert-St. Louis Intl. Airport (STL) on schedule, select a flight that leaves from Logan Intl. Airport (BIL) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this hour.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Logan Intl. Airport (BIL) to Lambert-St. Louis Intl. Airport (STL) last-minute?
Booking your plane ticket from BIL to STL right before your journey is usually more expensive. But if there's some wiggle room with your travel times and dates, you could snag a cheap last-minute fare.
Is it cheaper to book a BIL to STL flight and hotel package?
You'll generally save money by booking a BIL to STL flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's easy to manage it all in one convenient place. Once you've selected your ideal accommodations and flights, consider adding extras such as car rentals, activities and tours.
Can I cancel or change the date of my flight from Logan Intl. Airport (BIL) to Lambert-St. Louis Intl. Airport (STL)?
If you reserved your BIL to STL flight in the last 24 hours, you may be able to cancel or modify it without fees. Depending on the airline and the type of ticket you purchased, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal for more details.

Travel information

Origin airport
Logan Intl.
Destination airport
Lambert-St. Louis Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, United
Roundtrip price
$332
Distance
1045 mi

Book with confidence

Billings to St. Louis Flights

The cheapest times to fly from Billings to St. Louis

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Billings to St. Louis are during the month of December. You can find some of the cheapest flights from Billings to St. Louis with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Billings to St. Louis

Sunday is one of the best days to book for cheap flights from Billings to St. Louis: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Billings to St. Louis

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Billings to St. Louis in 2025. You can also book with separate airlines for your outbound and return journeys, from $167 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Billings to St. Louis flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Billings to St. Louis airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Billings to St. Louis Flights

Explore a world of travel with Expedia

*Available to One Key members.