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

American Airlines, at $259, was found to be the cheapest airline from St. Louis to Brownsville. An alternate airline flying to your destination would be United Airlines. American Airlines is priced at 31% lower than the current average price of a flight leaving 3 months from now.

What is the cheapest day to fly from St. Louis to Brownsville?

Travelers seeking maximum savings on their St. Louis to Brownsville flight should consider departing on Tuesday at noon when fares are most often at their lowest. Sunday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

In terms of precipitation, rainfall in Brownsville ranges from 1.1 - 5.9 inches per month. September is typically the wettest month, when rainfall can reach 5.9 in. February is typically the driest time to visit Brownsville when rainfall is around 1.1 in.

If weather is an important factor for your trip to Brownsville, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 86.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 60.8 F).

What is the cheapest day to fly round-trip from St. Louis to Brownsville?

It’s generally more expensive to depart on a Monday, if you have to leave on this day you can still search on Cheapflights to find great options that meet your needs.

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

Our data shows that October tends to be the cheapest month to fly to Brownsville from St. Louis. Users have commonly found prices around $381 for the month, but tickets can be as low as $250. Due to multiple factors, prepare for potentially higher prices in March.

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.

$259+ Flights from St. Louis to Brownsville

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Cheap flight deals from St. Louis to Brownsville

Round-trip from	$259 (American Airlines)
Popular in	March
Cheapest in	October
Average price	$412

From Lambert-St Louis to Brownsville South Padre Is. Intl

Search Deals

Highest demand for flights based on searches. 5% potential increase in price ($21 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 1% potential price decrease ($7 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in July 2025

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Find 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 July 11, 2025.

Tue 9/25:30 pmSTL - BRO

1 stop5h 29mAmerican Airlines

Tue 9/96:39 pmBRO - STL

1 stop4h 11mAmerican Airlines

Deal found 7/9

$259

Fri 7/256:15 pmSTL - BRO

1 stop5h 17mUnited Airlines

Tue 7/295:10 amBRO - STL

2 stops10h 37mUnited Airlines

Deal found 7/10

$373

Best flights from St. Louis to Brownsville
Discover carefully curated flight deals from St. Louis to Brownsville that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 11, 2025.

Tue 9/25:30 pmSTL - BRO

1 stop5h 29mAmerican Airlines

Tue 9/96:39 pmBRO - STL

1 stop4h 11mAmerican Airlines

Deal found 7/9

$259

Fri 7/256:15 pmSTL - BRO

1 stop5h 17mUnited Airlines

Tue 7/295:10 amBRO - STL

2 stops10h 37mUnited Airlines

Deal found 7/10

$373

Last-minute flights from St. Louis to Brownsville
Discover last-minute flight deals from St. Louis to Brownsville. Data last updated July 11, 2025 and is based on user searches.

Fri 7/256:15 pmSTL - BRO

1 stop5h 17mUnited Airlines

Tue 7/295:10 amBRO - STL

2 stops10h 37mUnited Airlines

Deal found 7/10

$373

Tue 8/1212:20 pmSTL - BRO

1 stop10h 39mAmerican Airlines

Wed 8/133:06 pmBRO - STL

1 stop8h 08mAmerican Airlines

Deal found 7/9

$415

Cheapflights Fare Finder

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

St. LouisBrownsville

STL - BRO

STLBRO

Lambert-St Louis

Tue 9/2

5:30 pm-10:59 pm

1 stop5h 29m

Brownsville South Padre Is. Intl

Tue 9/9

6:39 pm-10:50 pm

1 stop4h 11m

$259

St. LouisBrownsville

STL - BRO

STLBRO

Lambert-St Louis

Fri 7/25

6:15 pm-11:32 pm

1 stop5h 17m

Brownsville South Padre Is. Intl

Tue 7/29

5:10 am-3:47 pm

2 stops10h 37m

$373

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/9

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, August is the cheapest month in which you can book a flight from St. Louis to Brownsville (average of $328). Flying from St. Louis to Brownsville in March is currently the most expensive (average of $471). 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.

What is the cheapest time of day to fly from STL to BRO?

Unlike in the afternoon, when flights are generally more expensive, you can save up to 28% on flights from St. Louis to Brownsville by exploring options for tickets at noon.

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

Reviews of airlines servicing Brownsville

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

8,846 reviews

Reviews

1 / 20

2.0

Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!

United Airlines

7.4

Good

8,846 reviews

United Airlines

7.4

Good

8,846 reviews

Reviews

1 / 20

2.0

Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!

American Airlines

7.2

Good

10,000 reviews

United Airlines

7.4

Good

8,846 reviews

Reviews

1 / 20

2.0

Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!

Related info for your journey

What are the cheapest airlines flying from St. Louis to Brownsville round-trip?
American Airlines, at $259, was found to be the cheapest airline from St. Louis to Brownsville. An alternate airline flying to your destination would be United Airlines. American Airlines is priced at 31% 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, August is the cheapest month in which you can book a flight from St. Louis to Brownsville (average of $328). Flying from St. Louis to Brownsville in March is currently the most expensive (average of $471). 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

Browse thousands of different options on Cheapflights for your next trip

Top 2 airlines flying from St. Louis to Brownsville

Airline	Cheapest	Average	Flexibility	On-time
United Airlines	Cheapest$258	Average$349	FlexibilityNo cancel fee	On-time69%
American Airlines	Cheapest$260	Average$413	FlexibilityNo cancel fee	On-time71%

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$259+ 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 9/2. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from St. Louis to Brownsville with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from St. Louis to Brownsville

Round-trip from

Popular in

Cheapest in

Average price

Find flight deals from St. Louis to Brownsville

Cheapest flights from St. Louis to BrownsvilleExplore 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 July 11, 2025.

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 July 11, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from St. Louis to Brownsville that are best for you.

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.

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?

What is the cheapest time of day to fly from STL to BRO?

Find hourly flight availability from St. Louis to Brownsville. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 11, 2025.

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

Reviews of airlines servicing Brownsville

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.

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.

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

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

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

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

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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for St. Louis to Brownsville

See prices for flight routes from nearby airports that may be better suited for you.

Top 2 airlines flying from St. Louis to Brownsville

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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 July 11, 2025.