$239 Cheap Flights from Bismarck (BIS) to St. Louis (STL)

View $239 flight on Mon, Apr 27, 2026Opens in a new window

Popular airlines from Bismarck, ND (BIS-Bismarck Municipal) to St. Louis Lambert Intl. Airport (STL)

Cheap Flights from Bismarck to St. Louis (BIS-STL)

Prices were available within the past 7 days and start at $239 for one-way flights and $249 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Tue, Mar 31 - Tue, Apr 21
BIS
Bismarck
STL
St. Louis
$249 Roundtrip, just found
$249
Roundtrip
just found
Select Delta flight, departing Tue, Mar 31 from Bismarck to St. Louis, returning Tue, Apr 21, priced at $249 just found
Delta
Tue, Nov 4 - Wed, Nov 12
BIS
Bismarck
STL
St. Louis
$254 Roundtrip, found 1 day ago
$254
Roundtrip
found 1 day ago
Select Delta flight, departing Tue, Nov 4 from Bismarck to St. Louis, returning Wed, Nov 12, priced at $254 found 1 day ago
Delta
Tue, Nov 4 - Sat, Nov 8
BIS
Bismarck
STL
St. Louis
$259 Roundtrip, found 1 day ago
$259
Roundtrip
found 1 day ago
Select Delta flight, departing Tue, Nov 4 from Bismarck to St. Louis, returning Sat, Nov 8, priced at $259 found 1 day ago
United
Tue, Nov 18 - Sat, Nov 22
BIS
Bismarck
STL
St. Louis
$274 Roundtrip, found 2 days ago
$274
Roundtrip
found 2 days ago
Select United flight, departing Tue, Nov 18 from Bismarck to St. Louis, returning Sat, Nov 22, priced at $274 found 2 days ago
Delta
Tue, Nov 25 - Wed, Dec 17
BIS
Bismarck
STL
St. Louis
$279 Roundtrip, found 4 hours ago
$279
Roundtrip
found 4 hours ago
Select Delta flight, departing Tue, Nov 25 from Bismarck to St. Louis, returning Wed, Dec 17, priced at $279 found 4 hours ago
Delta
Wed, Apr 1 - Tue, Apr 21
BIS
Bismarck
STL
St. Louis
$284 Roundtrip, just found
$284
Roundtrip
just found
Select Delta flight, departing Wed, Apr 1 from Bismarck to St. Louis, returning Tue, Apr 21, priced at $284 just found
American Airlines
Mon, Feb 9 - Sun, Feb 15
BIS
Bismarck
STL
St. Louis
$294 Roundtrip, found 2 days ago
$294
Roundtrip
found 2 days ago
Select American Airlines flight, departing Mon, Feb 9 from Bismarck to St. Louis, returning Sun, Feb 15, priced at $294 found 2 days ago
Delta
Tue, Nov 25 - Sat, Dec 13
BIS
Bismarck
STL
St. Louis
$309 Roundtrip, found 4 hours ago
$309
Roundtrip
found 4 hours ago
Select Delta flight, departing Tue, Nov 25 from Bismarck to St. Louis, returning Sat, Dec 13, priced at $309 found 4 hours ago
Delta
Thu, Apr 2 - Tue, Apr 21
BIS
Bismarck
STL
St. Louis
$314 Roundtrip, just found
$314
Roundtrip
just found
Select Delta flight, departing Thu, Apr 2 from Bismarck to St. Louis, returning Tue, Apr 21, priced at $314 just found
Delta
Wed, Apr 1 - Thu, Apr 23
BIS
Bismarck
STL
St. Louis
$319 Roundtrip, just found
$319
Roundtrip
just found
Select Delta flight, departing Wed, Apr 1 from Bismarck to St. Louis, returning Thu, Apr 23, priced at $319 just found

Find the cheapest month to fly from Bismarck (BIS) to St. Louis (STL)

April is typically the cheapest month to fly

From $207 - $543 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 $254
STL
Lambert-St. Louis Intl.
Cheapest
Average driving time to city center20 min
Flights from $254
Flights from Bismarck (BIS) to St. Louis (STL)
Origin airport
Bismarck Municipal
Destination airport
Lambert-St. Louis Intl.
Airlines serving
American Airlines, Delta, United
Roundtrip price
$248
Distance
764 mi

Bismarck to St. Louis Flights

The cheapest times to fly from Bismarck 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 Bismarck to St. Louis are during the month of March. You can find some of the cheapest flights from Bismarck to St. Louis with Expedia's search tool and vast selection of airlines.

 

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

Sunday is one of the best days to book for cheap flights from Bismarck 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 Bismarck 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 Bismarck to St. Louis in 2025. You can also book with separate airlines for your outbound and return journeys, from $239 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 Bismarck 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 Bismarck 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.

 

Frequently asked questions

How much does a flight from Bismarck Municipal Airport (BIS) to Lambert-St. Louis Intl. Airport (STL) cost?
Snag a cheap one-way flight from $239 or cheap return flight from $249 from Bismarck Municipal Airport (BIS) 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 Bismarck Municipal Airport (BIS) to Lambert-St. Louis Intl. Airport (STL)?
The cheapest month to fly from BIS to STL is March, when demand is low. Off-peak months are often when airlines offer better prices between these airports.
What is the cheapest airline that flies from Bismarck Municipal Airport (BIS) to Lambert-St. Louis Intl. Airport (STL)?
To find the cheapest airline flying from BIS to STL, use Expedia's filter tool. Tailor your search based on what's important to you, such as preferred carriers and seat class. You can then sort your results by "Price (lowest to highest)" to see the most affordable options first.
How many flights per day from Bismarck Municipal Airport (BIS) to Lambert-St. Louis Intl. Airport (STL)?
You'll have to hop on a flight with a layover when traveling from Bismarck Municipal Airport (BIS) to Lambert-St. Louis Intl. Airport (STL). Direct flights don't operate daily on this route. However, just filter your search to include one or more stops to find an option that works for you.
What day of the week has the most flights from BIS to STL?
Friday is typically the busiest day for flights, while Tuesday is often the quietest.* Just remember that flight schedules can vary depending on various factors, such as the time of year and airline.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Bismarck Municipal Airport (BIS) to Lambert-St. Louis Intl. Airport (STL)?
Opt for a flight from Bismarck Municipal Airport (BIS) to Lambert-St. Louis Intl. Airport (STL) that leaves before 3 PM to reduce the risk of cancellations. Departures after this time have a 22% higher chance of being canceled, on average.**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 Bismarck Municipal Airport (BIS) to Lambert-St. Louis Intl. Airport (STL) last-minute?
Last-minute bookings from BIS to STL are usually more expensive. For the lowest prices, start looking for flights as soon as possible. That said, if you can play around with your travel dates, you may score a cheap fare right before you leave.
Is it cheaper to book a BIS to STL flight and hotel package?
Booking a BIS to STL flight and hotel package tends to be cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your trip in one place. Select from our wide range of stays and then add activities, flights and car rentals to your booking. Bundle it all together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Bismarck Municipal Airport (BIS) to Lambert-St. Louis Intl. Airport (STL)?
Typically, it's possible to reschedule or cancel your BIS to STL flight. However, if the booking was made more than 24 hours ago, additional charges may apply. Refer to your airline's policies in your itinerary to see what changes are possible and if any costs are involved. You'll also find more information on our Customer Service portal.

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*Available to One Key members.