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$340+ 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 12/21. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BRO
Jan 16 — Jan 231
Fri 1/16
Fri 1/23
1 adult, Economy
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Cheap 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 December 17, 2025.

This United Airlines deal was found by Cheapflights users on 12/15. 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.
Mon 12/151:34 pmONT - BRO
2 stops8h 02mUnited Airlines
Mon 12/224:55 pmBRO - ONT
1 stop6h 57mUnited Airlines
Deal found 12/15$645
This United Airlines deal was found by Cheapflights users on 12/16. 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.
Sun 12/216:04 amONT - BRO
1 stop8h 03mUnited Airlines
Sun 12/285:10 amBRO - ONT
1 stop18h 42mUnited Airlines
Deal found 12/16$1,091
This United Airlines deal was found by Cheapflights users on 12/16. 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 12/226:04 amONT - BRO
1 stop8h 03mUnited Airlines
Sun 12/284:55 pmBRO - ONT
1 stop6h 57mUnited Airlines
Deal found 12/16$1,206

Find 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 December 17, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$369
(United Airlines)

One-way from

$340
(American Airlines)

Popular in

November

Cheapest in

August

Average price

$528
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.
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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. 19% potential increase in price ($111 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 7% potential price decrease ($35 potential savings vs. average RT price).
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Average for round-trip flights in December 2025
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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 December 17, 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

Thu 1/8

6:00 am-4:12 pm

1 stop8h 12m

Brownsville South Padre Is. Intl

Mon 1/12

5:25 pm-9:58 pm

1 stop6h 33m

$369

OntarioBrownsville

ONT - BRO

ONTBRO

Ontario

Fri 1/9

6:00 am-4:12 pm

1 stop8h 12m

Brownsville South Padre Is. Intl

Mon 1/12

5:25 pm-9:58 pm

1 stop6h 33m

$369

OntarioBrownsville

ONT - BRO

ONTBRO

Ontario

Tue 1/6

8:00 am-4:12 pm

1 stop6h 12m

Brownsville South Padre Is. Intl

Mon 1/12

5:25 pm-9:58 pm

1 stop6h 33m

$369

OntarioBrownsville

ONT - BRO

ONTBRO

Ontario

Sat 4/11

6:00 am-4:23 pm

1 stop8h 23m

Brownsville South Padre Is. Intl

Wed 4/15

5:25 pm-10:11 pm

1 stop6h 46m

$369

OntarioBrownsville

ONT - BRO

ONTBRO

Ontario

Thu 1/8

6:00 am-4:12 pm

1 stop8h 12m

Brownsville South Padre Is. Intl

Sun 1/11

5:25 pm-9:58 pm

1 stop6h 33m

$429

OntarioBrownsville

ONT - BRO

ONTBRO

Ontario

Wed 1/7

5:05 am-6:02 pm

2 stops10h 57m

Brownsville South Padre Is. Intl

Sun 1/11

5:25 pm-9:58 pm

1 stop6h 33m

$434

OntarioBrownsville

ONT - BRO

ONTBRO

Ontario

Sun 12/21

11:59 pm-9:59 am

1 stop8h 00m

$340

OntarioBrownsville

ONT - BRO

ONTBRO

Ontario

Mon 12/22

12:45 pm-10:46 pm

1 stop8h 01m

$340

OntarioBrownsville

ONT - BRO

ONTBRO

Ontario

Mon 12/29

5:05 am-4:07 pm

2 stops9h 02m

$474

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/16

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 December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Ontario-Brownsville flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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 $272). 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.

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 $369, United Airlines can have you in Brownsville from Ontario in 8h 12m. The distance between Ontario and Brownsville is about 1328 mi.

  • 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 $272). 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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