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Cheap flights from Baton Rouge to St. Louis from $159

This is the cheapest one-way 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 6/1. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
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
6:03 am - 12:22 pm
BTR
-
STL
6h 19m
1 stop
Delta Logo
10:49 am - 3:07 pm
STL
-
BTR
4h 18m
1 stop
$305Delta
Tue, May 12 - Tue, May 19
American Airlines Logo
4:53 pm - 10:59 pm
BTR
-
STL
6h 06m
1 stop
American Airlines Logo
3:24 pm - 8:45 pm
STL
-
BTR
5h 21m
1 stop
$315American Airlines
Tue, May 5 - Tue, May 12
Delta Logo
7:04 pm - 11:59 pm
BTR
-
STL
4h 55m
1 stop
Delta Logo
6:00 am - 12:49 pm
STL
-
BTR
6h 49m
1 stop
$317Delta
Mon, Jun 1 - Thu, Jun 4
American Airlines Logo
2:33 pm - 7:30 pm
BTR
-
STL
4h 57m
1 stop
American Airlines Logo
12:27 pm - 8:45 pm
STL
-
BTR
8h 18m
2 stops
$320American Airlines
Tue, May 5 - Tue, May 12
Delta Logo
7:08 pm - 11:36 pm
BTR
-
STL
4h 28m
1 stop
Delta Logo
4:41 pm - 9:56 pm
STL
-
BTR
5h 15m
1 stop
$325Delta
Fri, Apr 24 - Mon, Apr 27
American Airlines Logo
6:32 pm - 10:59 pm
BTR
-
STL
4h 27m
1 stop
American Airlines Logo
12:27 pm - 9:25 pm
STL
-
BTR
8h 58m
2 stops
$330American Airlines
Fri, Apr 24 - Mon, Apr 27
Delta Logo
4:07 pm - 9:40 pm
BTR
-
STL
5h 33m
1 stop
Delta Logo
9:21 am - 3:12 pm
STL
-
BTR
5h 51m
1 stop
$331Delta
Sat, Jun 13 - Fri, Jun 19
Delta Logo
7:04 pm - 11:59 pm
BTR
-
STL
4h 55m
1 stop
Delta Logo
5:20 pm - 10:00 pm
STL
-
BTR
4h 40m
1 stop
$337Delta
Fri, May 22 - Mon, May 25
American Airlines Logo
6:32 pm - 10:59 pm
BTR
-
STL
4h 27m
1 stop
American Airlines Logo
8:54 am - 6:02 pm
STL
-
BTR
9h 08m
2 stops
$350American Airlines
Fri, Apr 24 - Tue, Apr 28
United Airlines Logo
5:00 am - 10:07 am
BTR
-
STL
5h 07m
1 stop
United Airlines Logo
6:00 am - 3:34 pm
STL
-
BTR
9h 34m
2 stops
$351United Airlines
Wed, May 27 - Wed, Jul 8

American Airlines flights from Baton Rouge to St. Louis

Our best American Airlines deals on Baton Rouge to St. Louis flight tickets
American Airlines
May 5
BTR4:53 pmBaton Rouge Ryan
6h 06m
1 stop
STL10:59 pmLambert-St Louis
May 12
STL3:24 pmLambert-St Louis
5h 21m
1 stop
BTR8:45 pmBaton Rouge Ryan
$315
American Airlines
May 5
BTR2:33 pmBaton Rouge Ryan
4h 57m
1 stop
STL7:30 pmLambert-St Louis
May 12
STL12:27 pmLambert-St Louis
8h 18m
2 stops
BTR8:45 pmBaton Rouge Ryan
$320
American Airlines
Apr 24
BTR6:32 pmBaton Rouge Ryan
4h 27m
1 stop
STL10:59 pmLambert-St Louis
Apr 27
STL12:27 pmLambert-St Louis
8h 58m
2 stops
BTR9:25 pmBaton Rouge Ryan
$330

United Airlines flights from Baton Rouge to St. Louis

Our best United Airlines deals on Baton Rouge to St. Louis flight tickets
United Airlines
May 27
BTR5:00 amBaton Rouge Ryan
5h 07m
1 stop
STL10:07 amLambert-St Louis
Jul 8
STL6:00 amLambert-St Louis
9h 34m
2 stops
BTR3:34 pmBaton Rouge Ryan
$351
United Airlines
Apr 12
BTR5:00 amBaton Rouge Ryan
4h 25m
1 stop
STL9:25 amLambert-St Louis
Apr 25
STL6:00 amLambert-St Louis
5h 21m
1 stop
BTR11:21 amBaton Rouge Ryan
$371
United Airlines
Apr 12
BTR5:00 amBaton Rouge Ryan
4h 25m
1 stop
STL9:25 amLambert-St Louis
Apr 25
STL7:45 amLambert-St Louis
7h 48m
2 stops
BTR3:33 pmBaton Rouge Ryan
$376

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 April 11, 2026.
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

Cheapest round-trip

Baton RougeSt. Louis

BTR - STL

BTRSTL

Baton Rouge Ryan

Tue 5/12

6:03 am-12:22 pm

1 stop6h 19m

Lambert-St Louis

Tue 5/19

10:49 am-3:07 pm

1 stop4h 18m

$305

Baton RougeSt. Louis

BTR - STL

BTRSTL

Baton Rouge Ryan

Tue 5/5

4:53 pm-10:59 pm

1 stop6h 06m

Lambert-St Louis

Tue 5/12

3:24 pm-8:45 pm

1 stop5h 21m

$315

Baton RougeSt. Louis

BTR - STL

BTRSTL

Baton Rouge Ryan

Mon 6/1

7:04 pm-11:59 pm

1 stop4h 55m

Lambert-St Louis

Thu 6/4

6:00 am-12:49 pm

1 stop6h 49m

$317

Baton RougeSt. Louis

BTR - STL

BTRSTL

Baton Rouge Ryan

Tue 5/5

2:33 pm-7:30 pm

1 stop4h 57m

Lambert-St Louis

Tue 5/12

12:27 pm-8:45 pm

2 stops8h 18m

$320

Baton RougeSt. Louis

BTR - STL

BTRSTL

Baton Rouge Ryan

Fri 4/24

7:08 pm-11:36 pm

1 stop4h 28m

Lambert-St Louis

Mon 4/27

4:41 pm-9:56 pm

1 stop5h 15m

$325

Baton RougeSt. Louis

BTR - STL

BTRSTL

Baton Rouge Ryan

Fri 4/24

6:32 pm-10:59 pm

1 stop4h 27m

Lambert-St Louis

Mon 4/27

12:27 pm-9:25 pm

2 stops8h 58m

$330

Baton RougeSt. Louis

BTR - STL

BTRSTL

Baton Rouge Ryan

Sat 6/13

4:07 pm-9:40 pm

1 stop5h 33m

Lambert-St Louis

Fri 6/19

9:21 am-3:12 pm

1 stop5h 51m

$331
Quickest round-trip

Baton RougeSt. Louis

BTR - STL

BTRSTL

Baton Rouge Ryan

Fri 5/22

7:04 pm-11:59 pm

1 stop4h 55m

Lambert-St Louis

Mon 5/25

5:20 pm-10:00 pm

1 stop4h 40m

$337

Baton RougeSt. Louis

BTR - STL

BTRSTL

Baton Rouge Ryan

Fri 4/24

6:32 pm-10:59 pm

1 stop4h 27m

Lambert-St Louis

Tue 4/28

8:54 am-6:02 pm

2 stops9h 08m

$350

Baton RougeSt. Louis

BTR - STL

BTRSTL

Baton Rouge Ryan

Wed 5/27

5:00 am-10:07 am

1 stop5h 07m

Lambert-St Louis

Wed 7/8

6:00 am-3:34 pm

2 stops9h 34m

$351

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 16 resultsSorted by cheapest first
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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, January 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 $263. The month of February is another great option to travel to St. Louis, with average flight prices from Baton Rouge averaging around $273.

How have Baton Rouge to St. Louis flight prices changed over time?

As of April 2026, prices for Baton Rouge to St. Louis flights are approximately 61% more expensive when compared to flights at the same time last year.

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

Fastest flight time

4h 28m

Direct flights

None
The fastest flight from Baton Rouge to St. Louis takes 4h 28m
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

Frequently asked questions about flying from Baton Rouge to St. Louis

  • 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 28m 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
DeltaPriceFrom $247Free CancellationRating
7.9
8,406 reviews
Search Delta flights
United AirlinesPriceFrom $248Free CancellationRating
7.4
9,569 reviews
Search United Airlines flights
American AirlinesPriceFrom $248Free CancellationRating
7.1
11,572 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
Maryland Heights
O'Fallon
Florissant
St. Peters
Collinsville
Wentzville
Alton
Fenton
Farmington
Clayton
Festus
Eureka
Edwardsville
Litchfield
Shrewsbury
Grafton

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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