HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Harlingen

$215+ 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 8/28. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — HRL
Aug 28 — Sep 41
Fri 8/28
Fri 9/4
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Ontario to Harlingen with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 July 29, 2026.

This American Airlines deal was found by Cheapflights users on 7/24. 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.
Thu 9/32:27 pm
ONT
-
HRL
1 stop6h 27m
American Airlines
Thu 9/108:00 pm
HRL
-
ONT
1 stop5h 36m
American Airlines
Deal found 7/24$335
This American Airlines deal was found by Cheapflights users on 7/26. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/3012:37 pm
ONT
-
HRL
1 stop8h 11m
American Airlines
Sun 10/45:51 am
HRL
-
ONT
1 stop5h 38m
American Airlines
Deal found 7/26$414
This United Airlines deal was found by Cheapflights users on 7/28. 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 9/95:00 am
ONT
-
HRL
2 stops14h 52m
United Airlines
Sat 9/125:18 pm
HRL
-
ONT
1 stop6h 41m
United Airlines
Deal found 7/28$451
This American Airlines deal was found by Cheapflights users on 7/26. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/12:22 pm
ONT
-
HRL
1 stop6h 26m
American Airlines
Mon 10/55:50 am
HRL
-
ONT
1 stop5h 45m
American Airlines
Deal found 7/26$453

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 July 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$335
(American Airlines)

One-way from

$215
(United Airlines)

Popular in

May

Cheapest in

June

Average price

$566
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. 13% potential increase in price ($66 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 7% potential price decrease ($30 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 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 July 29, 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

Thu 9/3

2:27 pm-10:54 pm

1 stop6h 27m

Harlingen Valley Intl

Thu 9/10

4:53 pm-11:36 pm

1 stop8h 43m

$393
Quickest round-trip

OntarioHarlingen

ONT - HRL

ONTHRL

Ontario

Wed 9/30

12:37 pm-10:48 pm

1 stop8h 11m

Harlingen Valley Intl

Sun 10/4

5:51 am-9:29 am

1 stop5h 38m

$414

OntarioHarlingen

ONT - HRL

ONTHRL

Ontario

Wed 9/9

5:00 am-9:52 pm

2 stops14h 52m

Harlingen Valley Intl

Sat 9/12

5:18 pm-9:59 pm

1 stop6h 41m

$451

OntarioHarlingen

ONT - HRL

ONTHRL

Ontario

Tue 8/25

1:18 pm-3:59 pm

2 stops24h 41m

Harlingen Valley Intl

Sat 8/29

1:59 pm-6:12 pm

1 stop6h 13m

$476

OntarioHarlingen

ONT - HRL

ONTHRL

Ontario

Sat 11/14

9:25 am-10:48 pm

2 stops11h 23m

Harlingen Valley Intl

Wed 11/18

5:05 am-12:29 pm

2 stops9h 24m

$480
Cheapest one-way

OntarioHarlingen

ONT - HRL

ONTHRL

Ontario

Fri 8/28

6:00 am-3:59 pm

1 stop7h 59m

$215

OntarioHarlingen

ONT - HRL

ONTHRL

Ontario

Sat 8/22

5:00 am-3:59 pm

2 stops8h 59m

$353

OntarioHarlingen

ONT - HRL

ONTHRL

Ontario

Sat 8/15

5:00 am-3:59 pm

2 stops8h 59m

$413
Quickest one-way

OntarioHarlingen

ONT - HRL

ONTHRL

Ontario

Mon 8/3

5:45 am-1:30 pm

1 stop5h 45m

$430

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/25

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 July.
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 July 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
4,227 reviews

Entertainment

7.5

Boarding

8.1

Crew

8.6

Overall

8.0

Comfort

8.0

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Southwest
8.0
Very good
4,227 reviews
Southwest
8.0
Very good
4,227 reviews

Entertainment

7.5

Boarding

8.1

Crew

8.6

Overall

8.0

Comfort

8.0

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
American Airlines
7.1
Good
11,839 reviews
Southwest
8.0
Very good
4,227 reviews

Entertainment

7.5

Boarding

8.1

Crew

8.6

Overall

8.0

Comfort

8.0

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

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 6h 27m. American Airlines provides one of the quickest options available for as low as $393. The distance from Ontario to Harlingen is about 1305 mi.

  • 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.

  • 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Ontario to Harlingen

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to Dallas/Fort Worth flights
Los Angeles to Hobby flights
Los Angeles to George Bush Intcntl flights
San Francisco to Dallas/Fort Worth flights
Ontario to Hobby flights
Ontario to Dallas/Fort Worth flights
Los Angeles to Austin flights
Ontario to George Bush Intcntl flights
Santa Ana to Dallas/Fort Worth flights
Los Angeles to San Antonio flights
San Francisco to Hobby flights
San Francisco to Austin flights
Los Angeles to Love Field flights
San Diego to Dallas/Fort Worth flights
San Francisco to George Bush Intcntl flights
San Jose to Dallas/Fort Worth flights
Las Vegas to Dallas/Fort Worth flights
Burbank to Dallas/Fort Worth flights
Long Beach to Dallas/Fort Worth flights
Sacramento to Dallas/Fort Worth flights
San Diego to Hobby flights
Las Vegas to Hobby flights
San Francisco to Love Field flights
Burbank to Hobby flights
Oakland to Dallas/Fort Worth flights
San Diego to George Bush Intcntl flights
Santa Ana to Hobby flights
Sacramento to Hobby flights
Las Vegas to George Bush Intcntl flights
Burbank to George Bush Intcntl flights
Ontario to Austin flights
Ontario to San Antonio flights
Santa Ana to George Bush Intcntl flights
Santa Ana to Love Field flights
San Jose to Austin flights
Las Vegas to Austin flights
San Francisco to San Antonio flights
Sacramento to George Bush Intcntl flights
San Diego to Austin flights
Ontario to Love Field flights
Sacramento to Austin flights
Fresno to Dallas/Fort Worth flights
Reno to Dallas/Fort Worth flights
Palm Springs to Dallas/Fort Worth flights
Los Angeles to El Paso flights
Santa Ana to Austin flights
Las Vegas to Love Field flights
Sacramento to Love Field flights
San Diego to Love Field flights
San Jose to Hobby flights

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 July 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$250Average$263FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$256Average$573FlexibilityNo cancel feeOn-time71%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.