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Cheap flights from Baton Rouge to St. Louis from $249

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Baton Rouge to St. Louis departing on 12/20. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from Baton Rouge to St. Louis

Cheap round-trip flights

Enter your travel dates to find the best prices.
Delta Logo
6:59 pm - 11:42 pmBTR-STL
4h 43m1 stop
Delta Logo
7:10 am - 1:32 pmSTL-BTR
6h 22m1 stop
$249Delta
Find Deal
Sat, Dec 20 - Tue, Jan 6
American Airlines Logo
7:00 am - 4:19 pmBTR-STL
9h 19m2 stops
American Airlines Logo
9:30 am - 1:45 pmSTL-BTR
4h 15m1 stop
$254American Airlines
Find Deal
Sat, Dec 13 - Mon, Dec 15
Delta Logo
4:02 pm - 8:41 pmBTR-STL
4h 39m1 stop
Delta Logo
10:13 am - 3:15 pmSTL-BTR
5h 02m1 stop
$264Delta
Find Deal
Thu, Feb 19 - Mon, Feb 23
United Airlines Logo
5:07 am - 10:39 amBTR-STL
5h 32m1 stop
United Airlines Logo
8:20 am - 1:22 pmSTL-BTR
5h 02m1 stop
$279United Airlines
Find Deal
Tue, Nov 18 - Sat, Nov 22
United Airlines Logo
5:07 am - 3:47 pmBTR-STL
10h 40m2 stops
United Airlines Logo
8:20 am - 3:21 pmSTL-BTR
7h 01m1 stop
$284United Airlines
Find Deal
Tue, Nov 18 - Sat, Nov 22
Delta Logo
6:59 pm - 11:42 pmBTR-STL
4h 43m1 stop
Delta Logo
3:41 pm - 9:53 pmSTL-BTR
6h 12m1 stop
$294Delta
Find Deal
Sat, Dec 20 - Sun, Jan 4
United Airlines Logo
12:11 pm - 4:46 pmBTR-STL
4h 35m1 stop
United Airlines Logo
10:30 am - 5:32 pmSTL-BTR
7h 02m1 stop
$319United Airlines
Find Deal
Wed, Dec 24 - Mon, Jan 5
United Airlines Logo
12:11 pm - 4:46 pmBTR-STL
4h 35m1 stop
United Airlines Logo
8:05 am - 5:53 pmSTL-BTR
9h 48m2 stops
$324United Airlines
Find Deal
Wed, Dec 24 - Tue, Jan 6
American Airlines Logo
5:00 am - 1:49 pmBTR-STL
8h 49m2 stops
American Airlines Logo
9:32 am - 4:00 pmSTL-BTR
6h 28m1 stop
$359American Airlines
Find Deal
Thu, Feb 19 - Mon, Feb 23
American Airlines Logo
7:11 am - 4:47 pmBTR-STL
9h 36m2 stops
American Airlines Logo
10:17 am - 5:01 pmSTL-BTR
6h 44m1 stop
$369American Airlines
Find Deal
Thu, Dec 18 - Tue, Jan 6

Delta flights from Baton Rouge to St. Louis

Our best Delta deals on Baton Rouge to St. Louis flight tickets
Delta
Dec 20
BTR6:59 pmBaton Rouge Ryan
4h 43m
1 stop
STL11:42 pmLambert-St Louis
Jan 6
STL7:10 amLambert-St Louis
6h 22m
1 stop
BTR1:32 pmBaton Rouge Ryan
$249
Find similar
Delta
Feb 19
BTR4:02 pmBaton Rouge Ryan
4h 39m
1 stop
STL8:41 pmLambert-St Louis
Feb 23
STL10:13 amLambert-St Louis
5h 02m
1 stop
BTR3:15 pmBaton Rouge Ryan
$264
Find similar
Delta
Dec 20
BTR6:59 pmBaton Rouge Ryan
4h 43m
1 stop
STL11:42 pmLambert-St Louis
Jan 4
STL3:41 pmLambert-St Louis
6h 12m
1 stop
BTR9:53 pmBaton Rouge Ryan
$294
Find similar

American Airlines flights from Baton Rouge to St. Louis

Our best American Airlines deals on Baton Rouge to St. Louis flight tickets
American Airlines
Dec 13
BTR7:00 amBaton Rouge Ryan
9h 19m
2 stops
STL4:19 pmLambert-St Louis
Dec 15
STL9:30 amLambert-St Louis
4h 15m
1 stop
BTR1:45 pmBaton Rouge Ryan
$254
Find similar
American Airlines
Nov 7
BTR3:08 pmBaton Rouge Ryan
7h 59m
1 stop
STL11:07 pmLambert-St Louis
Nov 9
STL5:00 amLambert-St Louis
7h 29m
1 stop
BTR12:29 pmBaton Rouge Ryan
$354
Find similar
American Airlines
Feb 19
BTR5:00 amBaton Rouge Ryan
8h 49m
2 stops
STL1:49 pmLambert-St Louis
Feb 23
STL9:32 amLambert-St Louis
6h 28m
1 stop
BTR4:00 pmBaton Rouge Ryan
$359
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Baton Rouge to St. Louis that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated November 3, 2025.
Use the filters below to find and compare flights from Baton Rouge to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Baton RougeSt. Louis

BTR - STL

BTRSTL

Baton Rouge Ryan

Sat 12/20

6:59 pm-11:42 pm

1 stop4h 43m

Lambert-St Louis

Tue 1/6

7:10 am-1:32 pm

1 stop6h 22m

$249

Baton RougeSt. Louis

BTR - STL

BTRSTL

Baton Rouge Ryan

Sat 12/13

7:00 am-4:19 pm

2 stops9h 19m

Lambert-St Louis

Mon 12/15

9:30 am-1:45 pm

1 stop4h 15m

$254

Baton RougeSt. Louis

BTR - STL

BTRSTL

Baton Rouge Ryan

Thu 2/19

4:02 pm-8:41 pm

1 stop4h 39m

Lambert-St Louis

Mon 2/23

10:13 am-3:15 pm

1 stop5h 02m

$264

Baton RougeSt. Louis

BTR - STL

BTRSTL

Baton Rouge Ryan

Tue 11/18

5:07 am-10:39 am

1 stop5h 32m

Lambert-St Louis

Sat 11/22

8:20 am-1:22 pm

1 stop5h 02m

$279

Baton RougeSt. Louis

BTR - STL

BTRSTL

Baton Rouge Ryan

Tue 11/18

5:07 am-3:47 pm

2 stops10h 40m

Lambert-St Louis

Sat 11/22

8:20 am-3:21 pm

1 stop7h 01m

$284

Baton RougeSt. Louis

BTR - STL

BTRSTL

Baton Rouge Ryan

Sat 12/20

6:59 pm-11:42 pm

1 stop4h 43m

Lambert-St Louis

Sun 1/4

3:41 pm-9:53 pm

1 stop6h 12m

$294

Baton RougeSt. Louis

BTR - STL

BTRSTL

Baton Rouge Ryan

Wed 12/24

12:11 pm-4:46 pm

1 stop4h 35m

Lambert-St Louis

Mon 1/5

10:30 am-5:32 pm

1 stop7h 02m

$319

Baton RougeSt. Louis

BTR - STL

BTRSTL

Baton Rouge Ryan

Wed 12/24

12:11 pm-4:46 pm

1 stop4h 35m

Lambert-St Louis

Tue 1/6

8:05 am-5:53 pm

2 stops9h 48m

$324

Baton RougeSt. Louis

BTR - STL

BTRSTL

Baton Rouge Ryan

Thu 2/19

5:00 am-1:49 pm

2 stops8h 49m

Lambert-St Louis

Mon 2/23

9:32 am-4:00 pm

1 stop6h 28m

$359

Baton RougeSt. Louis

BTR - STL

BTRSTL

Baton Rouge Ryan

Thu 12/18

7:11 am-4:47 pm

2 stops9h 36m

Lambert-St Louis

Tue 1/6

10:17 am-5:01 pm

1 stop6h 44m

$369

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

See travel insights to St. Louis from

How to get the cheapest flight ticket from Baton Rouge to St. Louis

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between Baton Rouge and St. Louis?

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

In general, April is the cheapest month to fly from Baton Rouge to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $298. The month of July is another great option to travel to St. Louis, with average flight prices from Baton Rouge averaging around $307.

What is the cheapest day to depart on your flight to St. Louis?

The cheapest day to depart on your flight to St. Louis is on a Tuesday when prices can be found for as low as $273. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around $431. These prices are subject to change though, so be sure to set up a Price Alert for flights to St. Louis.

What is the cheapest time of day to depart on your flight to St. Louis?

Flying to St. Louis from Baton Rouge in the evening is the least expensive time of day to depart. momondo users have found prices as low as $337 when looking at flights departing in the evening. In the afternoon is when there is more demand to fly to St. Louis, so prices are often more expensive at around $392 per ticket.

When to book flights from Baton Rouge to St. Louis

Are you open to changing your travel dates? Check out the ideal times to fly from Baton Rouge to St. Louis according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Baton Rouge to St. Louis (BTR to STL) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Baton Rouge to St. Louis

Direct flights

None
There are no direct flights from Baton Rouge to St. Louis. There are no popular flight routes from Baton Rouge to St. Louis.
Search flight deals

  • How far is Baton Rouge Ryan to Lambert-St Louis by plane?

    Lambert-St Louis is 567.0 mi away from Baton Rouge Ryan. 4h 12m is a normal flight duration for this route.

  • When did momondo last update prices for flights from Baton Rouge Ryan Airport to Lambert-St Louis Airport?

    Prices for flights from Baton Rouge Ryan Airport to Lambert-St Louis Airport refresh daily.

  • How many operators does momondo search for flights from Baton Rouge Ryan Airport to Lambert-St Louis Airport?

  • How old do you have to be to fly from Baton Rouge Ryan Airport to Lambert-St Louis Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Baton Rouge Ryan Airport to Lambert-St Louis Airport.

  • What documentation or ID do you need to fly to Lambert-St Louis Airport?

    The travel and health documents required for your trip to Lambert-St Louis Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Lambert-St Louis Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular airline from Baton Rouge to St. Louis?

Best airlines flying from Baton Rouge to St. Louis

Compare and see reviews for airlines that fly from Baton Rouge to St. Louis with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $248Free CancellationRating
7.4
8,997 reviews
Search United Airlines flights
DeltaPriceFrom $248Free CancellationRating
7.9
8,002 reviews
Search Delta flights
American AirlinesPriceFrom $253Free CancellationRating
7.2
11,038 reviews
Search American Airlines flights

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
St. Charles
Chesterfield
Hermann
Fairview Heights
Florissant
Maryland Heights
O'Fallon
Wentzville
Fenton
Collinsville
St. Peters
Alton
Farmington
Festus
Glencoe
Edwardsville
Clayton
Eureka
Litchfield
Shrewsbury

Why use momondo?

Why should I use momondo to find a flight deal from Baton Rouge to St. Louis?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Baton Rouge to St. Louis. momondo saves you time and could save you money on your trip.

Can I find flights from Baton Rouge to St. Louis with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Baton Rouge to St. Louis flights to just show those with flexible booking policies.

How can momondo help me find flights from Baton Rouge to St. Louis?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Baton Rouge to St. Louis.

I’m not ready to book a flight from Baton Rouge to St. Louis right now. Can momondo alert me if prices change?

If you are simply researching potential flights to St. Louis, momondo offers a useful price alert feature which will track prices for flights to St. Louis from Baton Rouge and alert you when they change.

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