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$374+ Cheap flights from Ontario to Brownsville (ONT - 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 3/7. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BRO
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
1 adult, Economy
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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 September 15, 2025.

Round-trip from

$374
(United Airlines)

Popular in

May

Cheapest in

August

Average price

$348
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).
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Cheapest flight prices on average. 2% potential price decrease ($12 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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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 September 15, 2025.

This United Airlines deal was found by Cheapflights users on 9/13. 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 10/39:36 amONT - BRO
2 stops11h 57mUnited Airlines
Tue 10/75:15 pmBRO - ONT
1 stop6h 09mUnited Airlines
Deal found 9/13$379
This American Airlines deal was found by Cheapflights users on 9/14. 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.
Mon 10/1311:59 pmONT - BRO
1 stop7h 54mAmerican Airlines
Thu 10/167:08 pmBRO - ONT
1 stop6h 51mAmerican Airlines
Deal found 9/14$468
This United Airlines deal was found by Cheapflights users on 9/15. 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 10/91:15 pmONT - BRO
2 stops8h 18mUnited Airlines
Thu 10/165:15 pmBRO - ONT
1 stop6h 09mUnited Airlines
Deal found 9/15$494
This American Airlines deal was found by Cheapflights users on 9/13. 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.
Mon 12/222:42 pmONT - BRO
1 stop6h 04mAmerican Airlines
Fri 12/267:48 pmBRO - ONT
1 stop5h 58mAmerican Airlines
Deal found 9/13$735
This American Airlines deal was found by Cheapflights users on 9/13. 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 12/2011:59 pmONT - BRO
1 stop7h 52mAmerican Airlines
Fri 12/267:48 pmBRO - ONT
1 stop5h 58mAmerican Airlines
Deal found 9/13$771
This American Airlines deal was found by Cheapflights users on 9/13. 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.
Sun 12/2112:55 pmONT - BRO
2 stops7h 51mAmerican Airlines
Sat 12/277:48 pmBRO - ONT
1 stop5h 58mAmerican Airlines
Deal found 9/13$776
This American Airlines deal was found by Cheapflights users on 9/13. 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.
Mon 12/222:42 pmONT - BRO
1 stop6h 04mAmerican Airlines
Sat 12/277:48 pmBRO - ONT
1 stop5h 58mAmerican Airlines
Deal found 9/13$781

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 September 15, 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

Sat 3/7

6:02 am-1:36 pm

1 stop5h 34m

Brownsville South Padre Is. Intl

Wed 3/11

5:25 pm-9:21 pm

1 stop5h 56m

$374

OntarioBrownsville

ONT - BRO

ONTBRO

Ontario

Fri 10/3

9:36 am-11:33 pm

2 stops11h 57m

Brownsville South Padre Is. Intl

Tue 10/7

5:15 pm-9:24 pm

1 stop6h 09m

$379

OntarioBrownsville

ONT - BRO

ONTBRO

Ontario

Thu 10/9

1:15 pm-11:33 pm

2 stops8h 18m

Brownsville South Padre Is. Intl

Thu 10/16

5:15 pm-9:24 pm

1 stop6h 09m

$494

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/13

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, August is the cheapest month in which you can book a flight from Ontario to Brownsville (average of $328). Flying from Ontario to Brownsville in March is currently the most expensive (average of $474). 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 September 15, 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
10,000 reviews

Entertainment

6.9

Crew

8.0

Comfort

7.2

Boarding

7.5

Food

6.4

Overall

7.2

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
10,000 reviews
American Airlines
7.2
Good
10,000 reviews

Entertainment

6.9

Crew

8.0

Comfort

7.2

Boarding

7.5

Food

6.4

Overall

7.2

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 $374, United Airlines can have you in Brownsville from Ontario in 5h 34m. The distance between Ontario and Brownsville is about 1328 mi.

  • 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, August is the cheapest month in which you can book a flight from Ontario to Brownsville (average of $328). Flying from Ontario to Brownsville in March is currently the most expensive (average of $474). 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 Ontario to Brownsville

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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 September 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$268Average$466FlexibilityNo cancel feeOn-time71%

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