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Harlingen

$210+ Cheap flights from Ontario to Harlingen, TX (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 3/31. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — HRL
Feb 28 — Mar 71
Sat 2/28
Sat 3/7
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 January 29, 2026.

This American Airlines deal was found by Cheapflights users on 1/27. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/2711:58 pm
ONT
-
HRL
1 stop8h 14m
American Airlines
Sun 3/16:00 am
HRL
-
ONT
1 stop6h 06m
American Airlines
Deal found 1/27$378
This American Airlines deal was found by Cheapflights users on 1/27. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/2811:58 pm
ONT
-
HRL
1 stop8h 14m
American Airlines
Sun 3/18:06 pm
HRL
-
ONT
1 stop5h 53m
American Airlines
Deal found 1/27$389
This United Airlines deal was found by Cheapflights users on 1/27. 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.
Wed 2/118:00 am
ONT
-
HRL
1 stop6h 06m
United Airlines
Sun 2/155:22 pm
HRL
-
ONT
1 stop6h 37m
United Airlines
Deal found 1/27$419
This American Airlines deal was found by Cheapflights users on 1/27. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/1411:58 pm
ONT
-
HRL
1 stop8h 14m
American Airlines
Sun 3/228:06 pm
HRL
-
ONT
1 stop5h 53m
American Airlines
Deal found 1/27$486
This United Airlines deal was found by Cheapflights users on 1/26. 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 2/146:00 am
ONT
-
HRL
1 stop8h 04m
United Airlines
Wed 2/185:22 pm
HRL
-
ONT
1 stop6h 37m
United Airlines
Deal found 1/26$489
This United Airlines deal was found by Cheapflights users on 1/26. 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 2/36:00 am
ONT
-
HRL
2 stops13h 59m
United Airlines
Fri 2/65:25 pm
HRL
-
ONT
1 stop6h 33m
United Airlines
Deal found 1/26$494
This United Airlines deal was found by Cheapflights users on 1/29. 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.
Tue 3/316:05 am
ONT
-
HRL
1 stop7h 59m
United Airlines
Sat 4/45:18 pm
HRL
-
ONT
1 stop6h 32m
United Airlines
Deal found 1/29$495
This American Airlines deal was found by Cheapflights users on 1/27. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/132:39 pm
ONT
-
HRL
1 stop6h 14m
American Airlines
Sun 3/228:06 pm
HRL
-
ONT
1 stop5h 53m
American Airlines
Deal found 1/27$509
This American Airlines deal was found by Cheapflights users on 1/29. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/3111:58 pm
ONT
-
HRL
1 stop8h 14m
American Airlines
Sat 4/46:00 am
HRL
-
ONT
2 stops12h 22m
American Airlines
Deal found 1/29$522
This Southwest deal was found by Cheapflights users on 1/27. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/148:30 am
ONT
-
HRL
1 stop7h 10m
Southwest
Sun 3/226:20 am
HRL
-
ONT
2 stops9h 45m
Southwest
Deal found 1/27$534

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 January 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$378
(American Airlines)

One-way from

$210
(United Airlines)

Popular in

March

Cheapest in

July

Average price

$398
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. 18% potential increase in price ($80 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($23 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 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 January 29, 2026.
Use the filters below to find and compare flights from Ontario to Harlingen that are best for you.

Fly from

Ontario

Fly to

Harlingen

Route

Depart

Return

Price

OntarioHarlingen

ONT - HRL

ONTHRL

Ontario

Fri 2/27

11:58 pm-10:12 am

1 stop8h 14m

Harlingen Valley Intl

Sun 3/1

6:00 am-10:06 am

1 stop6h 06m

$378

OntarioHarlingen

ONT - HRL

ONTHRL

Ontario

Sat 2/28

11:58 pm-10:12 am

1 stop8h 14m

Harlingen Valley Intl

Sun 3/1

8:06 pm-11:59 pm

1 stop5h 53m

$389

OntarioHarlingen

ONT - HRL

ONTHRL

Ontario

Wed 2/11

8:00 am-4:06 pm

1 stop6h 06m

Harlingen Valley Intl

Sun 2/15

5:22 pm-9:59 pm

1 stop6h 37m

$419

OntarioHarlingen

ONT - HRL

ONTHRL

Ontario

Sat 3/14

11:58 pm-10:12 am

1 stop8h 14m

Harlingen Valley Intl

Sun 3/22

8:06 pm-11:59 pm

1 stop5h 53m

$486

OntarioHarlingen

ONT - HRL

ONTHRL

Ontario

Sat 2/14

6:00 am-4:04 pm

1 stop8h 04m

Harlingen Valley Intl

Wed 2/18

5:22 pm-9:59 pm

1 stop6h 37m

$489

OntarioHarlingen

ONT - HRL

ONTHRL

Ontario

Tue 3/31

6:05 am-4:04 pm

1 stop7h 59m

Harlingen Valley Intl

Sat 4/4

5:18 pm-9:50 pm

1 stop6h 32m

$495

OntarioHarlingen

ONT - HRL

ONTHRL

Ontario

Fri 3/13

2:39 pm-10:53 pm

1 stop6h 14m

Harlingen Valley Intl

Sun 3/22

8:06 pm-11:59 pm

1 stop5h 53m

$509

OntarioHarlingen

ONT - HRL

ONTHRL

Ontario

Tue 3/31

11:58 pm-10:12 am

1 stop8h 14m

Harlingen Valley Intl

Sat 4/4

6:00 am-4:22 pm

2 stops12h 22m

$522

OntarioHarlingen

ONT - HRL

ONTHRL

Ontario

Sat 3/14

8:30 am-5:40 pm

1 stop7h 10m

Harlingen Valley Intl

Sun 3/22

6:20 am-2:05 pm

2 stops9h 45m

$534

OntarioHarlingen

ONT - HRL

ONTHRL

Ontario

Tue 3/31

6:05 am-4:04 pm

1 stop7h 59m

$210

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/29

Showing 1-10 of 16 results
1
2

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

Cheapflights Insights

Everything you need to know about your flight from Ontario to Harlingen

What is the cheapest month to book a flight from Ontario to Harlingen, Texas?

Currently, April is the cheapest month in which you can book a flight from Ontario to Harlingen, Texas (average of $83). Flying from Ontario to Harlingen, Texas in March is currently the most expensive (average of $278). 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 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 January 29, 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
4,267 reviews

Comfort

8.0

Crew

8.6

Food

7.0

Overall

8.0

Boarding

8.1

Entertainment

7.5

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
4,267 reviews
Southwest
8.0
Very good
4,267 reviews

Comfort

8.0

Crew

8.6

Food

7.0

Overall

8.0

Boarding

8.1

Entertainment

7.5

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
7.2
Good
11,205 reviews
Southwest
8.0
Very good
4,267 reviews

Comfort

8.0

Crew

8.6

Food

7.0

Overall

8.0

Boarding

8.1

Entertainment

7.5

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, Texas?

    A quick flight from Ontario to Harlingen, Texas can take about 6h 06m. American Airlines provides one of the quickest options available for as low as $419. Airlines will cover a distance of 1305 mi. This flight may include one or multiple stops.

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

    Flying on American Airlines is currently your cheapest option to Harlingen, Texas, with prices starting at $174. Another option worth looking into is Southwest, starting at $250 round trip.

  • 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.

  • What is the cheapest month to book a flight from Ontario to Harlingen, Texas?

    Currently, April is the cheapest month in which you can book a flight from Ontario to Harlingen, Texas (average of $83). Flying from Ontario to Harlingen, Texas in March is currently the most expensive (average of $278). 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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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 January 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$174Average$378FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$250Average$263FlexibilityNo cancel feeOn-time63%

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