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$200+ Cheap flights from Harlingen, TX 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 9/21. Fares are subject to change and may not be available on all flights or dates of travel.
HRL — ONT
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
1 adult, Economy
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Cheap 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 September 15, 2025.

Round-trip from

$242
(United Airlines)

One-way from

$200
(American Airlines)

Popular in

December

Cheapest in

April

Average price

$348
From Harlingen Valley Intl to Ontario
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One-way flight from Harlingen Valley Intl to Ontario
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Highest demand for flights based on searches. 28% potential increase in price ($157 potential increase over avg. RT price).
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Cheapest flight prices on average. 9% potential price decrease ($33 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find 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 September 15, 2025.

This United Airlines deal was found by Cheapflights users on 9/14. 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 10/255:17 pmHRL - ONT
1 stop6h 07mUnited Airlines
Wed 10/296:38 pmONT - HRL
2 stops14h 21mUnited Airlines
Deal found 9/14$242
This Southwest deal was found by Cheapflights users on 9/14. 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 10/257:30 amHRL - ONT
2 stops9h 05mSouthwest
Wed 10/298:50 amONT - HRL
2 stops7h 40mSouthwest
Deal found 9/14$247
This American Airlines deal was found by Cheapflights users on 9/14. 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 10/256:37 pmHRL - ONT
1 stop6h 05mAmerican Airlines
Wed 10/2911:59 pmONT - HRL
1 stop7h 37mAmerican Airlines
Deal found 9/14$295
This United Airlines deal was found by Cheapflights users on 9/14. 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 11/112:10 pmHRL - ONT
2 stops10h 34mUnited Airlines
Wed 11/56:38 pmONT - HRL
2 stops14h 21mUnited Airlines
Deal found 9/14$319
This United Airlines deal was found by Cheapflights users on 9/14. 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 11/412:10 pmHRL - ONT
2 stops12h 41mUnited Airlines
Sat 11/86:38 pmONT - HRL
2 stops14h 21mUnited Airlines
Deal found 9/14$327
This American Airlines deal was found by Cheapflights users on 9/14. 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 11/46:40 pmHRL - ONT
1 stop5h 49mAmerican Airlines
Sat 11/812:53 pmONT - HRL
1 stop8h 29mAmerican Airlines
Deal found 9/14$331
This American Airlines deal was found by Cheapflights users on 9/14. 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 9/275:45 amHRL - ONT
1 stop8h 10mAmerican Airlines
Wed 10/18:15 amONT - HRL
1 stop7h 50mAmerican Airlines
Deal found 9/14$349
This United Airlines deal was found by Cheapflights users on 9/15. 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.
Wed 10/155:17 pmHRL - ONT
1 stop6h 07mUnited Airlines
Wed 10/226:00 amONT - HRL
1 stop8h 13mUnited Airlines
Deal found 9/15$358

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 September 15, 2025.
Use the filters below to find and compare flights from Harlingen to Ontario that are best for you.

Fly from

Harlingen

Fly to

Ontario

Route

Depart

Return

Price

HarlingenOntario

HRL - ONT

HRLONT

Harlingen Valley Intl

Sat 10/25

5:17 pm-9:24 pm

1 stop6h 07m

Ontario

Wed 10/29

6:38 pm-10:59 am

2 stops14h 21m

$242

HarlingenOntario

HRL - ONT

HRLONT

Harlingen Valley Intl

Sat 11/1

12:30 pm-4:10 pm

1 stop5h 40m

Ontario

Wed 11/5

12:45 pm-9:05 pm

2 stops6h 20m

$242

HarlingenOntario

HRL - ONT

HRLONT

Harlingen Valley Intl

Sat 10/25

7:30 am-2:35 pm

2 stops9h 05m

Ontario

Tue 10/28

5:15 am-3:05 pm

1 stop7h 50m

$242

HarlingenOntario

HRL - ONT

HRLONT

Harlingen Valley Intl

Sat 10/25

7:30 am-2:35 pm

2 stops9h 05m

Ontario

Wed 10/29

8:50 am-6:30 pm

2 stops7h 40m

$247

HarlingenOntario

HRL - ONT

HRLONT

Harlingen Valley Intl

Sat 11/1

12:10 pm-8:44 pm

2 stops10h 34m

Ontario

Wed 11/5

6:38 pm-10:59 am

2 stops14h 21m

$319

HarlingenOntario

HRL - ONT

HRLONT

Harlingen Valley Intl

Wed 11/5

12:10 pm-10:51 pm

2 stops12h 41m

Ontario

Sat 11/8

6:38 pm-10:59 am

2 stops14h 21m

$327

HarlingenOntario

HRL - ONT

HRLONT

Harlingen Valley Intl

Tue 11/4

12:10 pm-10:51 pm

2 stops12h 41m

Ontario

Sat 11/8

6:38 pm-10:59 am

2 stops14h 21m

$327

HarlingenOntario

HRL - ONT

HRLONT

Harlingen Valley Intl

Tue 11/4

6:40 pm-10:29 pm

1 stop5h 49m

Ontario

Sat 11/8

12:53 pm-11:22 pm

1 stop8h 29m

$331

HarlingenOntario

HRL - ONT

HRLONT

Harlingen Valley Intl

Wed 11/5

5:40 am-9:57 am

1 stop6h 17m

Ontario

Sat 11/8

12:53 pm-11:22 pm

1 stop8h 29m

$331

HarlingenOntario

HRL - ONT

HRLONT

Harlingen Valley Intl

Wed 12/10

5:00 pm-9:49 pm

1 stop6h 49m

Ontario

Wed 12/31

6:04 am-4:06 pm

1 stop8h 02m

$358

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/13

Showing 1-10 of 18 results
1
2

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.

Cheapflights Insights

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

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

Currently, August is the cheapest month in which you can book a flight from Harlingen, Texas to Ontario (average of $246). Flying from Harlingen, Texas to Ontario in March is currently the most expensive (average of $328). 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 Ontario

Get insights into the airlines that provide service to Ontario. 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 Ontario. Reviews last updated September 15, 2025.
Peruse reviews from past customers who have flown with Southwest and American Airlines from Harlingen to Ontario to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,242 reviews

Crew

8.6

Comfort

8.0

Overall

8.0

Entertainment

7.5

Boarding

8.1

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Southwest
8.0
Very good
4,242 reviews
Southwest
8.0
Very good
4,242 reviews

Crew

8.6

Comfort

8.0

Overall

8.0

Entertainment

7.5

Boarding

8.1

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,242 reviews

Crew

8.6

Comfort

8.0

Overall

8.0

Entertainment

7.5

Boarding

8.1

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.

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, Texas to Ontario?

    United Airlines and Southwest can get you from Harlingen, Texas to Ontario in just under 5h 40m. Your travel time can differ by up to 27m. Harlingen, Texas and Ontario are separated by a distance of 1305 mi. This flight may include one or multiple stops.

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

    Cheapflights users have booked flights from Harlingen, Texas to Ontario round-trip from $224. Another airline that can offer you cheap pricing is Southwest. American Airlines 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 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.

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

    Currently, August is the cheapest month in which you can book a flight from Harlingen, Texas to Ontario (average of $246). Flying from Harlingen, Texas to Ontario in March is currently the most expensive (average of $328). 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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Alternative routes for Harlingen to Ontario

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

Discover the top 2 airlines that operate flights from Harlingen to Ontario. 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 September 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$224Average$418FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$269Average$294FlexibilityNo cancel feeOn-time63%

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