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$240+ Cheap flights from Harlingen to Ontario (HRL - ONT)

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 8/8. Fares are subject to change and may not be available on all flights or dates of travel.
HRL — ONT
Aug 31 — Sep 71
Mon 8/31
Mon 9/7
1 adult, Economy
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Cheap flight deals from Harlingen to Ontario

Cheapest flights from Harlingen to Ontario
Explore the most affordable flight options available from Harlingen to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 1, 2026.

This United Airlines deal was found by Cheapflights users on 7/27. 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 11/175:25 pm
HRL
-
ONT
1 stop6h 15m
United Airlines
Thu 11/196:00 am
ONT
-
HRL
1 stop8h 01m
United Airlines
Deal found 7/27$429
This United Airlines deal was found by Cheapflights users on 7/31. 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 9/25:18 pm
HRL
-
ONT
2 stops20h 54m
United Airlines
Sun 9/66:00 am
ONT
-
HRL
1 stop5h 24m
United Airlines
Deal found 7/31$467
This United Airlines deal was found by Cheapflights users on 7/29. 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 8/221:59 pm
HRL
-
ONT
1 stop6h 13m
United Airlines
Tue 8/251:56 pm
ONT
-
HRL
2 stops24h 03m
United Airlines
Deal found 7/29$471

Find flight deals from Harlingen to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Harlingen (HRL) to Ontario (ONT). 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 August 1, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$429
(United Airlines)

One-way from

$240
(Southwest)

Popular in

July

Cheapest in

January

Average price

$334
Provider with most accurate pricing for Harlingen Valley Intl-Ontario flight deals.
Search Deals
Provider most trusted by Cheapflights users for Harlingen Valley Intl-Ontario flights.
Search Deals
From Harlingen Valley Intl to Ontario
Search Deals
One-way flight from Harlingen Valley Intl to Ontario
Search Deals
Highest demand for flights based on searches. 10% potential increase in price ($44 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($13 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Harlingen to Ontario 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 August 1, 2026.
Use the filters below to find and compare flights from Harlingen to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

HarlingenOntario

HRL - ONT

HRLONT

Harlingen Valley Intl

Tue 11/17

5:25 pm-9:40 pm

1 stop6h 15m

Ontario

Thu 11/19

6:00 am-4:01 pm

1 stop8h 01m

$429
Quickest round-trip

HarlingenOntario

HRL - ONT

HRLONT

Harlingen Valley Intl

Tue 1/12

5:16 pm-9:21 pm

1 stop6h 05m

Ontario

Wed 1/13

6:00 am-3:34 pm

1 stop7h 34m

$429

HarlingenOntario

HRL - ONT

HRLONT

Harlingen Valley Intl

Wed 9/2

5:18 pm-12:12 pm

2 stops20h 54m

Ontario

Sun 9/6

6:00 am-1:24 pm

1 stop5h 24m

$467

HarlingenOntario

HRL - ONT

HRLONT

Harlingen Valley Intl

Sat 8/22

1:59 pm-6:12 pm

1 stop6h 13m

Ontario

Tue 8/25

1:56 pm-3:59 pm

2 stops24h 03m

$471
Cheapest one-way
Quickest one-way

HarlingenOntario

HRL - ONT

HRLONT

Harlingen Valley Intl

Sat 8/8

6:05 am-9:35 am

1 stop5h 30m

$240

HarlingenOntario

HRL - ONT

HRLONT

Harlingen Valley Intl

Sun 10/4

5:05 am-12:18 pm

2 stops9h 13m

$279

HarlingenOntario

HRL - ONT

HRLONT

Harlingen Valley Intl

Tue 8/11

5:15 am-12:50 pm

2 stops9h 35m

$300

HarlingenOntario

HRL - ONT

HRLONT

Harlingen Valley Intl

Tue 8/18

1:59 pm-8:53 pm

2 stops8h 54m

$385

HarlingenOntario

HRL - ONT

HRLONT

Harlingen Valley Intl

Thu 8/6

5:10 am-12:12 pm

2 stops9h 02m

$435

HarlingenOntario

HRL - ONT

HRLONT

Harlingen Valley Intl

Sat 8/8

7:20 am-6:33 pm

3 stops13h 13m

$684

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/30

Showing 1-10 of 11 resultsSorted by cheapest first
1
2

Compare providers for flights from Harlingen to Ontario

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 Harlingen to Ontario in August.
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 Harlingen-Ontario flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Harlingen-Ontario flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Harlingen-Ontario flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Harlingen-Ontario 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 Harlingen-Ontario 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 Harlingen to Ontario

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

Related info for your journey

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

    A quick flight from Harlingen to Ontario can take about 6h 15m. United Airlines provides one of the quickest options available for as low as $429. There are 1305 mi between Harlingen and Ontario.

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

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

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

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

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

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

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