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$129+ 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 6/13. Fares are subject to change and may not be available on all flights or dates of travel.
HRL — ONT
Apr 21 — Apr 281
Tue 4/21
Tue 4/28
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 March 22, 2026.

This American Airlines deal was found by Cheapflights users on 3/20. 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.
Fri 4/177:53 pm
HRL
-
ONT
1 stop5h 53m
American Airlines
Tue 4/2111:59 pm
ONT
-
HRL
1 stop8h 18m
American Airlines
Deal found 3/20$257
This Southwest deal was found by Cheapflights users on 3/18. 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.
Tue 4/144:40 pm
HRL
-
ONT
1 stop7h 45m
Southwest
Fri 4/1712:40 pm
ONT
-
HRL
2 stops8h 20m
Southwest
Deal found 3/18$262
This American Airlines deal was found by Cheapflights users on 3/18. 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.
Tue 4/146:45 pm
HRL
-
ONT
1 stop5h 51m
American Airlines
Fri 4/1711:59 pm
ONT
-
HRL
1 stop8h 18m
American Airlines
Deal found 3/18$265
This United Airlines deal was found by Cheapflights users on 3/17. 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 4/255:18 pm
HRL
-
ONT
1 stop6h 32m
United Airlines
Tue 4/286:05 am
ONT
-
HRL
1 stop7h 59m
United Airlines
Deal found 3/17$277
This United Airlines deal was found by Cheapflights users on 3/18. 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.
Sat 5/235:20 pm
HRL
-
ONT
1 stop6h 35m
United Airlines
Sat 5/305:45 am
ONT
-
HRL
1 stop8h 14m
United Airlines
Deal found 3/18$297
This United Airlines deal was found by Cheapflights users on 3/19. 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.
Tue 4/289:20 am
HRL
-
ONT
2 stops10h 42m
United Airlines
Wed 4/296:05 am
ONT
-
HRL
1 stop7h 59m
United Airlines
Deal found 3/19$302

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 March 22, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$257
(American Airlines)

One-way from

$129
(United Airlines)

Popular in

December

Cheapest in

September

Average price

$446
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. 6% potential increase in price ($24 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($13 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
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 March 22, 2026.
Use the filters below to find and compare flights from Harlingen to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

HarlingenOntario

HRL - ONT

HRLONT

Harlingen Valley Intl

Tue 4/28

5:18 pm-9:50 pm

1 stop6h 32m

Ontario

Wed 4/29

6:05 am-4:04 pm

1 stop7h 59m

$257

HarlingenOntario

HRL - ONT

HRLONT

Harlingen Valley Intl

Sat 4/25

5:18 pm-9:50 pm

1 stop6h 32m

Ontario

Tue 4/28

6:05 am-4:04 pm

1 stop7h 59m

$277
Quickest round-trip

HarlingenOntario

HRL - ONT

HRLONT

Harlingen Valley Intl

Fri 4/17

7:53 pm-11:46 pm

1 stop5h 53m

Ontario

Tue 4/21

12:19 pm-10:51 pm

2 stops8h 32m

$287

HarlingenOntario

HRL - ONT

HRLONT

Harlingen Valley Intl

Sat 6/13

5:20 pm-9:55 pm

1 stop6h 35m

Ontario

Sat 6/20

5:45 am-3:59 pm

1 stop8h 14m

$297

HarlingenOntario

HRL - ONT

HRLONT

Harlingen Valley Intl

Sat 5/23

5:18 pm-10:38 pm

1 stop7h 20m

Ontario

Sat 5/30

11:59 pm-10:13 am

1 stop8h 14m

$332

HarlingenOntario

HRL - ONT

HRLONT

Harlingen Valley Intl

Sat 6/6

5:20 pm-9:55 pm

1 stop6h 35m

Ontario

Sun 6/21

5:45 am-3:59 pm

1 stop8h 14m

$392
Cheapest one-way
Quickest one-way

HarlingenOntario

HRL - ONT

HRLONT

Harlingen Valley Intl

Sat 6/13

5:20 pm-9:55 pm

1 stop6h 35m

$129

HarlingenOntario

HRL - ONT

HRLONT

Harlingen Valley Intl

Tue 6/9

7:20 am-5:28 pm

2 stops12h 08m

$258

HarlingenOntario

HRL - ONT

HRLONT

Harlingen Valley Intl

Mon 6/8

5:20 pm-12:12 pm

2 stops20h 52m

$298

HarlingenOntario

HRL - ONT

HRLONT

Harlingen Valley Intl

Wed 6/10

5:20 pm-9:55 pm

1 stop6h 35m

$320

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/19

Showing 1-10 of 14 resultsSorted by cheapest first
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 March.
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 Harlingen, Texas-Ontario flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Harlingen, Texas-Ontario flight deals on Cheapflights vs. FlightHub >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 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 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 $253). 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 March 22, 2026.
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
7.1
Good
11,487 reviews

Crew

7.9

Food

6.4

Boarding

7.5

Overall

7.1

Comfort

7.2

Entertainment

6.9

Reviews

1 / 20
2.0
Mediocre

Anonymous,Mar 2026

MIA - SFO

Horrible. When they power flights for other airlines there is nothing they can do to change or accommodate any changes
American Airlines
7.1
Good
11,487 reviews
American Airlines
7.1
Good
11,487 reviews

Crew

7.9

Food

6.4

Boarding

7.5

Overall

7.1

Comfort

7.2

Entertainment

6.9

Reviews

1 / 20
2.0
Mediocre

Anonymous,Mar 2026

MIA - SFO

Horrible. When they power flights for other airlines there is nothing they can do to change or accommodate any changes

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 American Airlines can get you from Harlingen, Texas to Ontario in just under 5h 53m. Your travel time can differ by up to 39m. Harlingen, Texas and Ontario are separated by a distance of 1305 mi. This flight may include one or multiple stops.

  • 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 $308.

  • 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 $253). 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 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 March 22, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$308Average$418FlexibilityNo cancel feeOn-time71%

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