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$229+ 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 1/19. Fares are subject to change and may not be available on all flights or dates of travel.
HRL — ONT
Jan 15 — Jan 221
Thu 1/15
Thu 1/22
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 December 16, 2025.

This United Airlines deal was found by Cheapflights users on 12/14. 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 12/305:20 pmHRL - ONT
1 stop6h 32mUnited Airlines
Wed 1/78:00 amONT - HRL
1 stop6h 06mUnited Airlines
Deal found 12/14$575
This United Airlines deal was found by Cheapflights users on 12/14. 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.
Wed 12/317:00 amHRL - ONT
1 stop16h 52mUnited Airlines
Wed 1/78:00 amONT - HRL
1 stop6h 06mUnited Airlines
Deal found 12/14$610
This United Airlines deal was found by Cheapflights users on 12/14. 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 12/305:20 pmHRL - ONT
1 stop6h 32mUnited Airlines
Thu 1/86:00 amONT - HRL
1 stop8h 06mUnited Airlines
Deal found 12/14$638
This United Airlines deal was found by Cheapflights users on 12/14. 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 12/305:20 pmHRL - ONT
1 stop6h 32mUnited Airlines
Tue 1/68:00 amONT - HRL
1 stop6h 06mUnited Airlines
Deal found 12/14$655
This United Airlines deal was found by Cheapflights users on 12/14. 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.
Wed 12/317:00 amHRL - ONT
1 stop16h 52mUnited Airlines
Thu 1/86:00 amONT - HRL
1 stop8h 06mUnited Airlines
Deal found 12/14$673
This United Airlines deal was found by Cheapflights users on 12/14. 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.
Mon 12/2912:15 pmHRL - ONT
1 stop11h 37mUnited Airlines
Wed 1/78:00 amONT - HRL
1 stop6h 06mUnited Airlines
Deal found 12/14$737
This United Airlines deal was found by Cheapflights users on 12/16. 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 12/305:20 pmHRL - ONT
1 stop6h 32mUnited Airlines
Wed 12/316:04 amONT - HRL
1 stop8h 02mUnited Airlines
Deal found 12/16$933
This United Airlines deal was found by Cheapflights users on 12/15. 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.
Sun 12/287:00 amHRL - ONT
1 stop16h 52mUnited Airlines
Fri 1/26:10 amONT - HRL
1 stop7h 56mUnited Airlines
Deal found 12/15$1,004
This United Airlines deal was found by Cheapflights users on 12/16. 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 12/2412:15 pmHRL - ONT
1 stop11h 37mUnited Airlines
Sun 12/286:04 amONT - HRL
1 stop5h 22mUnited Airlines
Deal found 12/16$1,015

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 December 16, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$331
(United Airlines)

One-way from

$229
(United Airlines)

Popular in

December

Cheapest in

September

Average price

$471
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. 12% potential increase in price ($45 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($14 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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 December 16, 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

Tue 2/10

5:25 pm-9:59 pm

1 stop6h 34m

Ontario

Wed 2/11

8:00 am-4:06 pm

1 stop6h 06m

$331

HarlingenOntario

HRL - ONT

HRLONT

Harlingen Valley Intl

Sat 5/9

7:00 am-5:47 pm

2 stops12h 47m

Ontario

Tue 5/12

6:05 am-4:03 pm

1 stop7h 58m

$454

HarlingenOntario

HRL - ONT

HRLONT

Harlingen Valley Intl

Tue 12/30

5:20 pm-9:52 pm

1 stop6h 32m

Ontario

Wed 1/7

8:00 am-4:06 pm

1 stop6h 06m

$575

HarlingenOntario

HRL - ONT

HRLONT

Harlingen Valley Intl

Wed 12/31

7:00 am-9:52 pm

1 stop16h 52m

Ontario

Wed 1/7

5:05 am-8:01 pm

2 stops12h 56m

$615

HarlingenOntario

HRL - ONT

HRLONT

Harlingen Valley Intl

Tue 12/30

5:20 pm-9:52 pm

1 stop6h 32m

Ontario

Thu 1/8

6:00 am-4:06 pm

1 stop8h 06m

$638

HarlingenOntario

HRL - ONT

HRLONT

Harlingen Valley Intl

Tue 12/30

5:20 pm-9:52 pm

1 stop6h 32m

Ontario

Tue 1/6

8:00 am-4:06 pm

1 stop6h 06m

$655

HarlingenOntario

HRL - ONT

HRLONT

Harlingen Valley Intl

Mon 1/19

5:25 pm-9:58 pm

1 stop6h 33m

$229

HarlingenOntario

HRL - ONT

HRLONT

Harlingen Valley Intl

Sat 1/17

5:25 pm-9:58 pm

1 stop6h 33m

$348

HarlingenOntario

HRL - ONT

HRLONT

Harlingen Valley Intl

Mon 12/29

5:20 pm-9:52 pm

1 stop6h 32m

$390

HarlingenOntario

HRL - ONT

HRLONT

Harlingen Valley Intl

Sun 12/28

8:11 pm-11:46 pm

1 stop5h 35m

$400

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/14

Showing 1-10 of 11 results
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 December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice 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, Texas-Ontario flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Harlingen, Texas-Ontario flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Harlingen, Texas-Ontario flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Harlingen, Texas-Ontario flights, Cheapflights users trust eDreams the most. eDreams 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, Texas-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.

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, July is the cheapest month in which you can book a flight from Harlingen, Texas to Ontario (average of $122). Flying from Harlingen, Texas to Ontario in December is currently the most expensive (average of $263). 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 December 16, 2025.
Peruse reviews from past customers who have flown with 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.
American Airlines
7.2
Good
11,049 reviews

Food

6.5

Crew

8.0

Boarding

7.5

Entertainment

6.9

Overall

7.2

Comfort

7.2

Reviews

1 / 20
6.0
Good

sheila,Mar 2025

DFW - MSP

We were delayed for 3 hours with no real reason or offer for compensation
American Airlines
7.2
Good
11,049 reviews
American Airlines
7.2
Good
11,049 reviews

Food

6.5

Crew

8.0

Boarding

7.5

Entertainment

6.9

Overall

7.2

Comfort

7.2

Reviews

1 / 20
6.0
Good

sheila,Mar 2025

DFW - MSP

We were delayed for 3 hours with no real reason or offer for compensation

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 can get you from Harlingen, Texas to Ontario in just under 6h 34m. Your travel time can differ by up to . Harlingen, Texas and Ontario are separated by a distance of 1305 mi.

  • What is the cheapest airline to fly from Harlingen, Texas to Ontario round-trip?

    Cheapflights users have booked flights from Harlingen, Texas to Ontario round-trip from $224.

  • 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, July is the cheapest month in which you can book a flight from Harlingen, Texas to Ontario (average of $122). Flying from Harlingen, Texas to Ontario in December is currently the most expensive (average of $263). 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

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Top airline flying from Harlingen to Ontario

Discover the top airline 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 December 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$224Average$418FlexibilityNo cancel feeOn-time71%

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