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$299+ Cheap flights from St. Louis to Brownsville (STL - BRO)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/7. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BRO
Apr 10 — Apr 171
Fri 4/10
Fri 4/17
1 adult, Economy
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Cheap flight deals from St. Louis to Brownsville

Cheapest flights from St. Louis to Brownsville
Explore the most affordable flight options available from St. Louis to Brownsville. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 11, 2026.

This United Airlines deal was found by Cheapflights users on 3/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/710:09 am
STL
-
BRO
1 stop6h 15m
United Airlines
Tue 4/145:25 pm
BRO
-
STL
1 stop5h 03m
United Airlines
Deal found 3/8$299
This United Airlines deal was found by Cheapflights users on 3/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/256:00 am
STL
-
BRO
1 stop5h 19m
United Airlines
Wed 4/299:15 am
BRO
-
STL
1 stop6h 53m
United Airlines
Deal found 3/11$319
This United Airlines deal was found by Cheapflights users on 3/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/56:15 am
STL
-
BRO
1 stop5h 07m
United Airlines
Wed 12/912:07 pm
BRO
-
STL
1 stop4h 28m
United Airlines
Deal found 3/8$369
This United Airlines deal was found by Cheapflights users on 3/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/137:45 am
STL
-
BRO
2 stops8h 39m
United Airlines
Wed 5/205:17 pm
BRO
-
STL
1 stop5h 13m
United Airlines
Deal found 3/7$374
This United Airlines deal was found by Cheapflights users on 3/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/2610:05 am
STL
-
BRO
1 stop6h 17m
United Airlines
Mon 3/305:25 pm
BRO
-
STL
1 stop5h 03m
United Airlines
Deal found 3/11$375

Find flight deals from St. Louis to Brownsville

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Brownsville (BRO). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated March 11, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$299
(United Airlines)

Popular in

December

Cheapest in

February

Average price

$477
Provider with most accurate pricing for Lambert-St Louis-Brownsville South Padre Is. Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Lambert-St Louis-Brownsville South Padre Is. Intl flights.
Search Deals
From Lambert-St Louis to Brownsville South Padre Is. Intl
Search Deals
Highest demand for flights based on searches. 6% potential increase in price ($26 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($20 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from St. Louis to Brownsville 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, Cheapflights users made 2,558,603 searches. Data last updated March 11, 2026.
Use the filters below to find and compare flights from St. Louis to Brownsville that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisBrownsville

STL - BRO

STLBRO

Lambert-St Louis

Tue 4/7

10:09 am-4:24 pm

1 stop6h 15m

Brownsville South Padre Is. Intl

Tue 4/14

5:25 pm-10:28 pm

1 stop5h 03m

$299

St. LouisBrownsville

STL - BRO

STLBRO

Lambert-St Louis

Sat 4/25

6:00 am-11:19 am

1 stop5h 19m

Brownsville South Padre Is. Intl

Wed 4/29

9:15 am-4:08 pm

1 stop6h 53m

$319

St. LouisBrownsville

STL - BRO

STLBRO

Lambert-St Louis

Wed 5/13

6:00 am-11:27 am

1 stop5h 27m

Brownsville South Padre Is. Intl

Wed 5/20

5:17 pm-10:30 pm

1 stop5h 13m

$369

St. LouisBrownsville

STL - BRO

STLBRO

Lambert-St Louis

Thu 3/26

10:05 am-4:22 pm

1 stop6h 17m

Brownsville South Padre Is. Intl

Mon 3/30

9:25 am-11:57 pm

2 stops14h 32m

$454

St. LouisBrownsville

STL - BRO

STLBRO

Lambert-St Louis

Sun 3/22

6:00 am-11:34 am

1 stop5h 34m

Brownsville South Padre Is. Intl

Thu 3/26

5:15 am-4:23 pm

2 stops11h 08m

$477
Quickest round-trip

St. LouisBrownsville

STL - BRO

STLBRO

Lambert-St Louis

Wed 3/25

5:12 am-10:17 am

1 stop5h 05m

Brownsville South Padre Is. Intl

Sun 3/29

5:40 am-10:59 am

1 stop5h 19m

$568

St. LouisBrownsville

STL - BRO

STLBRO

Lambert-St Louis

Fri 5/15

5:20 am-10:14 am

1 stop4h 54m

Brownsville South Padre Is. Intl

Sun 5/17

2:50 pm-11:56 pm

2 stops9h 06m

$568

St. LouisBrownsville

STL - BRO

STLBRO

Lambert-St Louis

Thu 3/26

10:05 am-4:22 pm

1 stop6h 17m

Brownsville South Padre Is. Intl

Sun 3/29

5:25 pm-10:28 pm

1 stop5h 03m

$574

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/8

Sorted by cheapest first

Compare providers for flights from St. Louis to Brownsville

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to Brownsville in March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on St. Louis-Brownsville flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Brownsville flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Brownsville flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on St. Louis-Brownsville flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Louis-Brownsville flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from St. Louis to Brownsville

Have a flexible travel schedule? Discover the best time to fly to Brownsville from St. Louis with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from St. Louis to Brownsville

What is the cheapest month to book a flight from St. Louis to Brownsville?

Currently, May is the cheapest month in which you can book a flight from St. Louis to Brownsville (average of $196). Flying from St. Louis to Brownsville in June is currently the most expensive (average of $336). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

How much does it cost to fly round-trip from St. Louis to Brownsville?

Reviews of airlines servicing Brownsville

Get insights into the airlines that provide service to Brownsville. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Brownsville. Reviews last updated March 11, 2026.
Read through reviews of airlines operating flights from St. Louis to Brownsville, such as United Airlines and American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,414 reviews

Overall

7.4

Comfort

7.3

Crew

8.1

Food

6.6

Entertainment

7.1

Boarding

7.7

Reviews

1 / 20
8.0
Excellent

FERNANDO,Sep 2024

YYC - IAH

Everything was good, maybe can give better foof flys more than 4 hours
United Airlines
7.4
Good
9,414 reviews
United Airlines
7.4
Good
9,414 reviews

Overall

7.4

Comfort

7.3

Crew

8.1

Food

6.6

Entertainment

7.1

Boarding

7.7

Reviews

1 / 20
8.0
Excellent

FERNANDO,Sep 2024

YYC - IAH

Everything was good, maybe can give better foof flys more than 4 hours
American Airlines
7.1
Good
11,419 reviews
United Airlines
7.4
Good
9,414 reviews

Overall

7.4

Comfort

7.3

Crew

8.1

Food

6.6

Entertainment

7.1

Boarding

7.7

Reviews

1 / 20
8.0
Excellent

FERNANDO,Sep 2024

YYC - IAH

Everything was good, maybe can give better foof flys more than 4 hours

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Brownsville. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from St. Louis to Brownsville?

    United Airlines can get you from St. Louis to Brownsville in just under 6h 15m. Your travel time can differ by up to . St. Louis and Brownsville are separated by a distance of 977 mi.

  • What are the cheapest airlines flying from St. Louis to Brownsville round-trip?

    United Airlines, at $258, was found to be the cheapest airline from St. Louis to Brownsville. An alternate airline flying to your destination would be American Airlines. United Airlines is priced at 32% lower than the current average price of a flight leaving 3 months from now.

  • Can I find deals for flights from St. Louis to Brownsville that include hotel bookings?

    Yes. In addition to deals on St. Louis to Brownsville flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from St. Louis to Brownsville?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Brownsville.

  • Can I find deals for business class flights from St. Louis to Brownsville?

    Yes. Cheapflights offers flight deals from St. Louis to Brownsville by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from St. Louis to Brownsville?

    Currently, May is the cheapest month in which you can book a flight from St. Louis to Brownsville (average of $196). Flying from St. Louis to Brownsville in June is currently the most expensive (average of $336). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Alternative routes for St. Louis to Brownsville

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Top 2 airlines flying from St. Louis to Brownsville

Discover the top 2 airlines that operate flights from St. Louis to Brownsville. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated March 11, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$258Average$349FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$273Average$497FlexibilityNo cancel feeOn-time71%

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