HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Brownsville

$235+ Cheap flights from Ontario to Brownsville (ONT - BRO)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/30. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BRO
Nov 21 — Nov 281
Fri 11/21
Fri 11/28
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Ontario to Brownsville with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Ontario to Brownsville

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) 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 October 22, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$349
(United Airlines)

One-way from

$235
(American Airlines)

Popular in

May

Cheapest in

August

Average price

$468
Provider with most accurate pricing for Ontario-Brownsville South Padre Is. Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Ontario-Brownsville South Padre Is. Intl flights.
Search Deals
From Ontario to Brownsville South Padre Is. Intl
Search Deals
One-way flight from Ontario to Brownsville South Padre Is. Intl
Search Deals
Highest demand for flights based on searches. 5% potential increase in price ($26 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($12 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

Find flight deals from Ontario to Brownsville

Cheapest flights from Ontario to Brownsville
Explore the most affordable flight options available from Ontario to Brownsville. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 22, 2025.

This United Airlines deal was found by Cheapflights users on 10/19. 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 12/136:00 amONT - BRO
1 stop8h 05mUnited Airlines
Fri 1/95:25 pmBRO - ONT
1 stop6h 33mUnited Airlines
Deal found 10/19$349
This United Airlines deal was found by Cheapflights users on 10/19. 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 12/136:00 amONT - BRO
1 stop8h 05mUnited Airlines
Thu 1/89:30 amBRO - ONT
2 stops10h 13mUnited Airlines
Deal found 10/19$354
This United Airlines deal was found by Cheapflights users on 10/19. 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.
Mon 12/151:34 pmONT - BRO
2 stops8h 02mUnited Airlines
Thu 1/812:13 pmBRO - ONT
2 stops12h 40mUnited Airlines
Deal found 10/19$359
This American Airlines deal was found by Cheapflights users on 10/20. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/136:10 amONT - BRO
1 stop6h 07mAmerican Airlines
Wed 11/195:42 pmBRO - ONT
1 stop6h 47mAmerican Airlines
Deal found 10/20$374
This American Airlines deal was found by Cheapflights users on 10/19. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/133:04 pmONT - BRO
1 stop5h 55mAmerican Airlines
Tue 1/66:44 pmBRO - ONT
1 stop6h 05mAmerican Airlines
Deal found 10/19$399
This American Airlines deal was found by Cheapflights users on 10/19. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/123:04 pmONT - BRO
1 stop5h 55mAmerican Airlines
Wed 1/76:00 amBRO - ONT
1 stop6h 08mAmerican Airlines
Deal found 10/19$404
This United Airlines deal was found by Cheapflights users on 10/19. 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.
Fri 12/126:00 amONT - BRO
1 stop15h 36mUnited Airlines
Fri 1/95:25 pmBRO - ONT
1 stop6h 33mUnited Airlines
Deal found 10/19$435
This United Airlines deal was found by Cheapflights users on 10/21. 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 10/296:05 amONT - BRO
1 stop7h 55mUnited Airlines
Sat 11/812:15 pmBRO - ONT
2 stops10h 29mUnited Airlines
Deal found 10/21$439
This United Airlines deal was found by Cheapflights users on 10/19. 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 12/175:05 amONT - BRO
2 stops9h 00mUnited Airlines
Thu 1/812:13 pmBRO - ONT
2 stops12h 40mUnited Airlines
Deal found 10/19$444
This American Airlines deal was found by Cheapflights users on 10/19. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/123:04 pmONT - BRO
1 stop5h 55mAmerican Airlines
Tue 1/66:44 pmBRO - ONT
1 stop6h 05mAmerican Airlines
Deal found 10/19$454

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario 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 October 22, 2025.
Use the filters below to find and compare flights from Ontario to Brownsville that are best for you.

Fly from

Ontario

Fly to

Brownsville

Route

Depart

Return

Price

OntarioBrownsville

ONT - BRO

ONTBRO

Ontario

Tue 12/16

6:00 am-4:05 pm

1 stop8h 05m

Brownsville South Padre Is. Intl

Fri 1/9

5:25 pm-9:58 pm

1 stop6h 33m

$349

OntarioBrownsville

ONT - BRO

ONTBRO

Ontario

Wed 12/17

6:00 am-4:05 pm

1 stop8h 05m

Brownsville South Padre Is. Intl

Fri 1/9

5:25 pm-9:58 pm

1 stop6h 33m

$349

OntarioBrownsville

ONT - BRO

ONTBRO

Ontario

Sat 12/13

12:55 pm-10:59 pm

2 stops8h 04m

Brownsville South Padre Is. Intl

Wed 1/7

6:00 am-10:08 am

1 stop6h 08m

$354

OntarioBrownsville

ONT - BRO

ONTBRO

Ontario

Sat 12/13

6:00 am-4:05 pm

1 stop8h 05m

Brownsville South Padre Is. Intl

Thu 1/8

9:30 am-5:43 pm

2 stops10h 13m

$354

OntarioBrownsville

ONT - BRO

ONTBRO

Ontario

Mon 12/15

1:34 pm-11:36 pm

2 stops8h 02m

Brownsville South Padre Is. Intl

Fri 1/9

5:25 pm-9:58 pm

1 stop6h 33m

$354

OntarioBrownsville

ONT - BRO

ONTBRO

Ontario

Sat 12/13

6:00 am-4:05 pm

1 stop8h 05m

Brownsville South Padre Is. Intl

Fri 1/9

12:13 pm-10:53 pm

2 stops12h 40m

$354

OntarioBrownsville

ONT - BRO

ONTBRO

Ontario

Wed 12/17

6:00 am-4:05 pm

1 stop8h 05m

Brownsville South Padre Is. Intl

Thu 1/8

12:13 pm-10:53 pm

2 stops12h 40m

$354

OntarioBrownsville

ONT - BRO

ONTBRO

Ontario

Tue 12/16

1:34 pm-11:36 pm

2 stops8h 02m

Brownsville South Padre Is. Intl

Thu 1/8

12:13 pm-10:53 pm

2 stops12h 40m

$359

OntarioBrownsville

ONT - BRO

ONTBRO

Ontario

Sun 12/14

11:59 pm-9:56 am

1 stop7h 57m

Brownsville South Padre Is. Intl

Tue 1/6

6:00 am-10:08 am

1 stop6h 08m

$399

OntarioBrownsville

ONT - BRO

ONTBRO

Ontario

Sun 12/14

11:59 pm-9:56 am

1 stop7h 57m

Brownsville South Padre Is. Intl

Fri 1/9

10:53 am-5:22 pm

1 stop8h 29m

$404

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/21

Showing 1-10 of 20 results
1
2

Compare providers for flights from Ontario 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 Ontario to Brownsville in October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice 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 Ontario-Brownsville flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-Brownsville flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ontario-Brownsville flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Ontario-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 Ontario-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 Ontario to Brownsville

Have a flexible travel schedule? Discover the best time to fly to Brownsville from Ontario 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 Ontario to Brownsville

What is the cheapest month to book a flight from Ontario to Brownsville?

Currently, April is the cheapest month in which you can book a flight from Ontario to Brownsville (average of $83). Flying from Ontario to Brownsville in March is currently the most expensive (average of $269). 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.

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 October 22, 2025.
See what other customers who have flown with American Airlines from Ontario to Brownsville have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
American Airlines
7.2
Good
11,028 reviews

Crew

8.0

Entertainment

6.9

Comfort

7.2

Food

6.4

Overall

7.2

Boarding

7.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2025

PIT - DFW

Due to gate changes,we nearly missed our flight. The gate agent reassigned our seats and would NOT give us our assigned seats,but she did honor that same request to the man who arrived after us. Her rudeness and difficulty was not appropriate.
American Airlines
7.2
Good
11,028 reviews
American Airlines
7.2
Good
11,028 reviews

Crew

8.0

Entertainment

6.9

Comfort

7.2

Food

6.4

Overall

7.2

Boarding

7.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2025

PIT - DFW

Due to gate changes,we nearly missed our flight. The gate agent reassigned our seats and would NOT give us our assigned seats,but she did honor that same request to the man who arrived after us. Her rudeness and difficulty was not appropriate.

Related info for your journey

Find useful and relevant information for your journey from Ontario 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 Ontario to Brownsville?

    For as low as $354, United Airlines can have you in Brownsville from Ontario in 8h 04m. The distance between Ontario and Brownsville is about 1328 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What is the cheapest airline to fly from Ontario to Brownsville round-trip?

    Our cheapest airline available from Ontario to Brownsville is American Airlines. Our recent data shows that you can find tickets from as low as $268 on this airline.

  • Can I find deals for flights from Ontario to Brownsville that include hotel bookings?

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

  • How can I find direct flights from Ontario to Brownsville?

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

  • Can I find deals for business class flights from Ontario to Brownsville?

    Yes. Cheapflights offers flight deals from Ontario 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 Ontario to Brownsville?

    Currently, April is the cheapest month in which you can book a flight from Ontario to Brownsville (average of $83). Flying from Ontario to Brownsville in March is currently the most expensive (average of $269). 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

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

Alternative routes for Ontario to Brownsville

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to Dallas/Fort Worth flights
San Francisco to Dallas/Fort Worth flights
Los Angeles to Hobby flights
Ontario to Dallas/Fort Worth flights
Santa Ana to Dallas/Fort Worth flights
Los Angeles to Austin flights
San Jose to Dallas/Fort Worth flights
Ontario to Hobby flights
Los Angeles to George Bush Intcntl flights
San Francisco to Hobby flights
Ontario to George Bush Intcntl flights
San Francisco to Austin flights
Los Angeles to Love Field flights
San Diego to Dallas/Fort Worth flights
Burbank to Dallas/Fort Worth flights
San Francisco to George Bush Intcntl flights
Oakland to Dallas/Fort Worth flights
Los Angeles to San Antonio flights
Santa Ana to Hobby flights
Sacramento to Dallas/Fort Worth flights
San Francisco to Love Field flights
Las Vegas to Dallas/Fort Worth flights
Santa Ana to George Bush Intcntl flights
Ontario to Austin flights
San Diego to Hobby flights
Burbank to Hobby flights
San Jose to Hobby flights
Santa Ana to Austin flights
San Diego to Austin flights
San Diego to George Bush Intcntl flights
Burbank to George Bush Intcntl flights
Ontario to Love Field flights
Sacramento to Hobby flights
San Jose to Love Field flights
San Jose to George Bush Intcntl flights
San Francisco to San Antonio flights
Las Vegas to Hobby flights
Ontario to San Antonio flights
San Jose to Austin flights
Burbank to Austin flights
Sacramento to George Bush Intcntl flights
Santa Ana to Love Field flights
San Diego to Love Field flights
Long Beach to Dallas/Fort Worth flights
Las Vegas to George Bush Intcntl flights
Los Angeles to El Paso flights
Oakland to Hobby flights
Sacramento to Love Field flights
Burbank to San Antonio flights
Fresno to Dallas/Fort Worth flights

Top airline flying from Ontario to Brownsville

Discover the top airline that operate flights from Ontario 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 October 22, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$268Average$466FlexibilityNo cancel feeOn-time71%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.