How long is the flight from Ontario to Harlingen, Texas?

A quick flight from Ontario to Harlingen, Texas can take about 6h 04m. United Airlines provides one of the quickest options available for as low as $331. Airlines will cover a distance of 1305 mi.

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.

In terms of precipitation, rainfall in Harlingen, Texas ranges from 1.1 - 5.2 inches per month. September is typically the wettest month, when rainfall can reach 5.2 in. January is typically the driest time to visit Harlingen, Texas when rainfall is around 1.1 in.

If weather is an important factor for your trip to Harlingen, Texas, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 84.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 60.8 F).

What is the cheapest time of day to fly from ONT to HRL?

When flying from Ontario to Harlingen, Texas, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Most accurate provider : When it comes to deals on Ontario-Harlingen, Texas flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Ontario-Harlingen, Texas flight deals on Cheapflights vs. eDreams >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 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 Ontario-Harlingen, Texas flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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.

$331+ Flights from Ontario to Harlingen, TX

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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 December 23, 2025.

Wed 12/2412:45 pmONT - HRL

2 stops7h 20mSouthwest

Mon 12/295:45 pmHRL - ONT

2 stops8h 20mSouthwest

Deal found 12/22

$642

Mon 12/2211:59 pmONT - HRL

1 stop7h 41mAmerican Airlines

Fri 12/268:11 pmHRL - ONT

1 stop5h 35mAmerican Airlines

Deal found 12/22

$670

Mon 12/226:04 amONT - HRL

1 stop8h 02mUnited Airlines

Tue 12/235:20 pmHRL - ONT

1 stop6h 32mUnited Airlines

Deal found 12/21

$838

Mon 12/226:04 amONT - HRL

1 stop8h 02mUnited Airlines

Wed 12/245:00 amHRL - ONT

2 stops9h 38mUnited Airlines

Deal found 12/21

$843

Best flights from Ontario to Harlingen
Discover carefully curated flight deals from Ontario to Harlingen that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 23, 2025.

Wed 2/258:00 amONT - HRL

1 stop6h 04mUnited Airlines

Sat 2/285:20 pmHRL - ONT

1 stop6h 39mUnited Airlines

Deal found 12/20

$331

Mon 1/56:10 amONT - HRL

1 stop7h 56mUnited Airlines

Fri 1/95:25 pmHRL - ONT

1 stop6h 33mUnited Airlines

Deal found 12/20

$558

Fri 1/26:10 amONT - HRL

1 stop7h 56mUnited Airlines

Mon 1/55:20 pmHRL - ONT

1 stop6h 32mUnited Airlines

Deal found 12/22

$654

Last-minute flights from Ontario to Harlingen
Discover last-minute flight deals from Ontario to Harlingen. Data last updated December 23, 2025 and is based on user searches.

Mon 12/2211:59 pmONT - HRL

1 stop7h 41mAmerican Airlines

Fri 12/268:11 pmHRL - ONT

1 stop5h 35mAmerican Airlines

Deal found 12/22

$670

Mon 12/226:04 amONT - HRL

1 stop8h 02mUnited Airlines

Tue 12/235:20 pmHRL - ONT

1 stop6h 32mUnited Airlines

Deal found 12/21

$838

Mon 12/226:04 amONT - HRL

1 stop8h 02mUnited Airlines

Wed 12/245:00 amHRL - ONT

2 stops9h 38mUnited Airlines

Deal found 12/21

$843

Wed 12/2412:45 pmONT - HRL

2 stops7h 20mSouthwest

Mon 12/295:45 pmHRL - ONT

2 stops8h 20mSouthwest

Deal found 12/22

$642

Fri 1/26:10 amONT - HRL

1 stop7h 56mUnited Airlines

Mon 1/55:20 pmHRL - ONT

1 stop6h 32mUnited Airlines

Deal found 12/22

$654

Mon 1/56:10 amONT - HRL

1 stop7h 56mUnited Airlines

Fri 1/95:25 pmHRL - ONT

1 stop6h 33mUnited Airlines

Deal found 12/20

$558

One-way flights from Ontario to Harlingen
Search for one-way flight options from Ontario to Harlingen. Find affordable one-way fares based on user searches. Data last updated December 23, 2025.

Mon 12/296:04 amONT - HRL

1 stop8h 02mUnited Airlines

Deal found 12/23

$528

Find flight deals from Ontario to Harlingen

Most accurate provider	eDreams 3 stars
Most trusted provider	eDreams 3 stars
Round-trip from	$331 (United Airlines)
Popular in	March
Cheapest in	July
Average price	$316

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

Highest demand for flights based on searches. 11% potential increase in price ($46 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in December 2025

Search Deals

Fly from

Fly to

Route

Depart

Return

Price

OntarioHarlingen

ONT - HRL

ONTHRL

Ontario

Wed 2/25

8:00 am-4:04 pm

1 stop6h 04m

Harlingen Valley Intl

Sat 2/28

5:20 pm-9:59 pm

1 stop6h 39m

$331

OntarioHarlingen

ONT - HRL

ONTHRL

Ontario

Mon 1/5

6:10 am-4:06 pm

1 stop7h 56m

Harlingen Valley Intl

Fri 1/9

5:25 pm-9:58 pm

1 stop6h 33m

$558

OntarioHarlingen

ONT - HRL

ONTHRL

Ontario

Fri 1/2

6:10 am-4:06 pm

1 stop7h 56m

Harlingen Valley Intl

Mon 1/5

5:20 pm-9:52 pm

1 stop6h 32m

$654

OntarioHarlingen

ONT - HRL

ONTHRL

Ontario

Mon 12/29

6:04 am-4:06 pm

1 stop8h 02m

$528

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/23

Compare providers for flights from Ontario to Harlingen

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ontario to Harlingen in December.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy2 stars	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*1 star
eDreams	Price Accuracy3 stars	Trust 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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Ontario-Harlingen, Texas flight deals on Cheapflights vs. eDreams >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 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 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 $272). 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

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

4,253 reviews

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

4,253 reviews

Southwest

8.0

Very good

4,253 reviews

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

11,054 reviews

Southwest

8.0

Very good

4,253 reviews

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

How long is the flight from Ontario to Harlingen, Texas?
A quick flight from Ontario to Harlingen, Texas can take about 6h 04m. United Airlines provides one of the quickest options available for as low as $331. Airlines will cover a distance of 1305 mi.
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 $272). 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

Browse thousands of different options on Cheapflights for your next trip

Top 2 airlines flying from Ontario to Harlingen

Airline	Cheapest	Average	Flexibility	On-time
American Airlines	Cheapest$174	Average$378	FlexibilityNo cancel fee	On-time71%
Southwest	Cheapest$250	Average$263	FlexibilityNo cancel fee	On-time63%

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$331+ Cheap flights from Ontario to Harlingen, TX (ONT - HRL)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/25. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Ontario to Harlingen with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Ontario to Harlingen

Cheapest flights from Ontario to HarlingenExplore 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 December 23, 2025.

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 December 23, 2025.

Find flight deals from Ontario to Harlingen

Most accurate provider

Most trusted provider

Round-trip from

Popular in

Cheapest in

Average price

Cheapflights Fare Finder

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

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 December.

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.

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?

Reviews of airlines servicing Harlingen

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.

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?

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

Can I find deals for flights from Ontario to Harlingen that include hotel bookings?

How can I find direct flights from Ontario to Harlingen?

Can I find deals for business class flights from Ontario to Harlingen?

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

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.

Top 2 airlines flying from Ontario to Harlingen

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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 December 23, 2025.