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Harlingen

$163+ Cheap flights from Ontario to Harlingen (ONT - HRL)

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 9/8. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — HRL
mai 22 — mai 291
sex 5/22
sex 5/29
1 adult, Economy
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Cheap flight deals from Ontario to Harlingen

Cheapest flights from Ontario to Harlingen
Explore the most affordable flight options available from Ontario to Harlingen. Find the lowest fares from popular airlines and budget airlines, with prices last updated on abril 22, 2026.

This United Airlines deal was found by Cheapflights users on 4/19. 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.
ter 5/56:00 am
ONT
-
HRL
2 stops13h 59m
United Airlines
qua 5/65:18 pm
HRL
-
ONT
1 stop6h 40m
United Airlines
Deal found 4/19$352
This American Airlines deal was found by Cheapflights users on 4/20. 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.
sáb 5/1612:19 pm
ONT
-
HRL
2 stops8h 32m
American Airlines
dom 5/177:53 pm
HRL
-
ONT
1 stop5h 53m
American Airlines
Deal found 4/20$362
This United Airlines deal was found by Cheapflights users on 4/20. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
qui 10/16:00 am
ONT
-
HRL
1 stop7h 58m
United Airlines
seg 10/55:18 pm
HRL
-
ONT
1 stop6h 40m
United Airlines
Deal found 4/20$387
This United Airlines deal was found by Cheapflights users on 4/18. 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.
dom 5/36:00 am
ONT
-
HRL
1 stop8h 04m
United Airlines
qui 5/77:00 am
HRL
-
ONT
2 stops12h 52m
United Airlines
Deal found 4/18$413
This American Airlines deal was found by Cheapflights users on 4/18. 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.
dom 5/311:59 pm
ONT
-
HRL
1 stop8h 18m
American Airlines
qui 5/77:53 pm
HRL
-
ONT
1 stop5h 53m
American Airlines
Deal found 4/18$414
This Southwest deal was found by Cheapflights users on 4/18. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom 5/36:10 am
ONT
-
HRL
2 stops9h 45m
Southwest
qui 5/76:00 am
HRL
-
ONT
2 stops6h 55m
Southwest
Deal found 4/18$419

Find flight deals from Ontario to Harlingen

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Harlingen (HRL). 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 abril 22, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$352
(United Airlines)

One-way from

$163
(United Airlines)

Popular in

November

Cheapest in

August

Average price

$422
Provider with most accurate pricing for Ontario-Harlingen Valley Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Ontario-Harlingen Valley Intl flights.
Search Deals
From Ontario to Harlingen Valley Intl
Search Deals
One-way flight from Ontario to Harlingen Valley Intl
Search Deals
Highest demand for flights based on searches. 37% potential increase in price ($258 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 13% potential price decrease ($52 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Harlingen 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 abril 22, 2026.
Use the filters below to find and compare flights from Ontario to Harlingen that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioHarlingen

ONT - HRL

ONTHRL

Ontario

ter 5/5

6:00 am-9:59 pm

2 stops13h 59m

Harlingen Valley Intl

qua 5/6

5:18 pm-9:58 pm

1 stop6h 40m

$352
Quickest round-trip

OntarioHarlingen

ONT - HRL

ONTHRL

Ontario

sáb 5/16

12:19 pm-10:51 pm

2 stops8h 32m

Harlingen Valley Intl

dom 5/17

7:53 pm-11:46 pm

1 stop5h 53m

$362

OntarioHarlingen

ONT - HRL

ONTHRL

Ontario

qui 10/1

6:00 am-3:58 pm

1 stop7h 58m

Harlingen Valley Intl

seg 10/5

5:18 pm-9:58 pm

1 stop6h 40m

$387
Cheapest one-way
Quickest one-way

OntarioHarlingen

ONT - HRL

ONTHRL

Ontario

ter 9/8

5:45 am-3:34 pm

1 stop7h 49m

$163

OntarioHarlingen

ONT - HRL

ONTHRL

Ontario

qua 4/29

11:59 pm-10:17 am

1 stop8h 18m

$169

OntarioHarlingen

ONT - HRL

ONTHRL

Ontario

qui 4/30

11:59 pm-10:17 am

1 stop8h 18m

$169

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/22

Sorted by cheapest first

Compare providers for flights from Ontario to Harlingen

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

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

Reviews of airlines servicing Harlingen

Get insights into the airlines that provide service to Harlingen. 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 Harlingen. Reviews last updated abril 22, 2026.
Read through reviews of airlines operating flights from Ontario to Harlingen, such as Southwest and American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,330 reviews

Entertainment

7.5

Boarding

8.1

Overall

8.0

Crew

8.6

Food

7.0

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.
Southwest
8.0
Very good
4,330 reviews
Southwest
8.0
Very good
4,330 reviews

Entertainment

7.5

Boarding

8.1

Overall

8.0

Crew

8.6

Food

7.0

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.
American Airlines
7.1
Good
11,647 reviews
Southwest
8.0
Very good
4,330 reviews

Entertainment

7.5

Boarding

8.1

Overall

8.0

Crew

8.6

Food

7.0

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.

Related info for your journey

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

    A quick flight from Ontario to Harlingen can take about 8h 32m. United Airlines provides one of the quickest options available for as low as $362. The distance from Ontario to Harlingen is about 1305 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines flying from Ontario to Harlingen round-trip?

    Southwest, at $250, was found to be the cheapest airline from Ontario to Harlingen. An alternate airline flying to your destination would be American Airlines. Southwest is priced at 43% lower than the current average price of a flight leaving 3 months from now.

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

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

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

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

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

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

See more FAQs

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Alternative routes for Ontario to Harlingen

See prices for flight routes from nearby airports that may be better suited for you.
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Top 2 airlines flying from Ontario to Harlingen

Discover the top 2 airlines that operate flights from Ontario to Harlingen. 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 abril 22, 2026.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$250Average$263FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$262Average$487FlexibilityNo cancel feeOn-time71%

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