HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Ontario

$141+ 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 3/25. Fares are subject to change and may not be available on all flights or dates of travel.
HRL — ONT
Feb 28 — Mar 71
Sat 2/28
Sat 3/7
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Harlingen to Ontario 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 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 January 29, 2026.

This United Airlines deal was found by Cheapflights users on 1/26. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/185:22 pm
HRL
-
ONT
1 stop6h 37m
United Airlines
Sat 2/216:00 am
ONT
-
HRL
1 stop8h 04m
United Airlines
Deal found 1/26$410
This United Airlines deal was found by Cheapflights users on 1/28. 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.
Fri 2/275:22 pm
HRL
-
ONT
1 stop6h 37m
United Airlines
Mon 3/26:00 am
ONT
-
HRL
1 stop8h 04m
United Airlines
Deal found 1/28$419
This American Airlines deal was found by Cheapflights users on 1/27. 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 1/306:44 pm
HRL
-
ONT
1 stop6h 04m
American Airlines
Wed 2/46:00 am
ONT
-
HRL
1 stop6h 46m
American Airlines
Deal found 1/27$439
This United Airlines deal was found by Cheapflights users on 1/28. 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.
Fri 1/305:25 pm
HRL
-
ONT
1 stop6h 33m
United Airlines
Fri 2/66:00 am
ONT
-
HRL
1 stop8h 06m
United Airlines
Deal found 1/28$519
This United Airlines deal was found by Cheapflights users on 1/28. 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.
Fri 1/3012:10 pm
HRL
-
ONT
2 stops10h 48m
United Airlines
Tue 2/108:00 am
ONT
-
HRL
1 stop6h 06m
United Airlines
Deal found 1/28$524
This United Airlines deal was found by Cheapflights users on 1/27. 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 2/239:20 am
HRL
-
ONT
2 stops10h 21m
United Airlines
Sat 2/286:00 am
ONT
-
HRL
1 stop8h 04m
United Airlines
Deal found 1/27$528
This United Airlines deal was found by Cheapflights users on 1/27. 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.
Fri 1/3012:10 pm
HRL
-
ONT
2 stops12h 43m
United Airlines
Wed 2/46:00 am
ONT
-
HRL
2 stops13h 59m
United Airlines
Deal found 1/27$529
This United Airlines deal was found by Cheapflights users on 1/27. 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 3/155:25 pm
HRL
-
ONT
1 stop7h 11m
United Airlines
Tue 3/176:00 am
ONT
-
HRL
1 stop8h 04m
United Airlines
Deal found 1/27$532

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 January 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$410
(United Airlines)

One-way from

$141
(American Airlines)

Popular in

December

Cheapest in

November

Average price

$349
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. 1% potential increase in price ($5 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($19 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 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 January 29, 2026.
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

Mon 2/23

5:22 pm-10:00 pm

1 stop6h 38m

Ontario

Sat 2/28

6:00 am-4:04 pm

1 stop8h 04m

$410

HarlingenOntario

HRL - ONT

HRLONT

Harlingen Valley Intl

Wed 2/18

5:22 pm-9:59 pm

1 stop6h 37m

Ontario

Sat 2/21

6:00 am-4:04 pm

1 stop8h 04m

$410

HarlingenOntario

HRL - ONT

HRLONT

Harlingen Valley Intl

Fri 2/27

5:22 pm-9:59 pm

1 stop6h 37m

Ontario

Mon 3/2

6:00 am-4:04 pm

1 stop8h 04m

$419

HarlingenOntario

HRL - ONT

HRLONT

Harlingen Valley Intl

Fri 3/20

5:25 pm-10:36 pm

1 stop7h 11m

Ontario

Mon 3/23

6:00 am-4:04 pm

1 stop8h 04m

$532

HarlingenOntario

HRL - ONT

HRLONT

Harlingen Valley Intl

Sun 3/15

5:25 pm-10:36 pm

1 stop7h 11m

Ontario

Tue 3/17

6:00 am-4:04 pm

1 stop8h 04m

$532

HarlingenOntario

HRL - ONT

HRLONT

Harlingen Valley Intl

Wed 3/25

8:06 pm-11:59 pm

1 stop5h 53m

$141

HarlingenOntario

HRL - ONT

HRLONT

Harlingen Valley Intl

Sat 2/28

5:22 pm-9:59 pm

1 stop6h 37m

$166

HarlingenOntario

HRL - ONT

HRLONT

Harlingen Valley Intl

Fri 2/20

8:06 pm-11:59 pm

1 stop5h 53m

$175

HarlingenOntario

HRL - ONT

HRLONT

Harlingen Valley Intl

Fri 2/27

8:06 pm-11:59 pm

1 stop5h 53m

$175

HarlingenOntario

HRL - ONT

HRLONT

Harlingen Valley Intl

Thu 3/26

8:06 pm-11:59 pm

1 stop5h 53m

$177

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/29

Showing 1-10 of 16 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 January.
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 $123). 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 January 29, 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
7.2
Good
11,206 reviews

Comfort

7.2

Crew

8.0

Boarding

7.5

Overall

7.2

Entertainment

6.9

Food

6.4

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
11,206 reviews
American Airlines
7.2
Good
11,206 reviews

Comfort

7.2

Crew

8.0

Boarding

7.5

Overall

7.2

Entertainment

6.9

Food

6.4

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 38m. 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. American Airlines is priced at 39% 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, July is the cheapest month in which you can book a flight from Harlingen, Texas to Ontario (average of $123). 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

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 Harlingen to Ontario

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

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 January 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$224Average$418FlexibilityNo 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.