What is the cheapest airline that flies from Harlingen Valley Intl to Ontario?

American Airlines and United Airlines are the most popular carriers operating from Harlingen Valley Intl to Ontario

What airlines fly to Ontario?

American Airlines, United Airlines and Delta are the top three most popular airlines that fly to Ontario from Harlingen, Texas according to our data. American Airlines is the first choice among our users, with 56% of people opting to fly with this airline when traveling to Ontario. Keep in mind that there are 5 different airlines that fly to Ontario on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from Harlingen Valley Intl Airport to Ontario Airport?

Prices for flights from Harlingen Valley Intl Airport to Ontario Airport refresh daily.

How many operators does momondo search for flights from Harlingen Valley Intl Airport to Ontario Airport?

As of November 2025, there is 1 operator available to choose from for flights from Harlingen Valley Intl Airport to Ontario Airport.

How old do you have to be to fly from Harlingen Valley Intl Airport to Ontario Airport?

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Harlingen Valley Intl Airport to Ontario Airport.

What documentation or ID do you need to fly to Ontario Airport?

The travel and health documents required for your trip to Ontario Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Ontario Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$166 Cheap Flights from Harlingen to Ontario in 2025/26

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Find the cheapest flights from Harlingen, Texas to Los Angeles

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

7:30 am - 5:20 pmHRL-ONT

11h 50m1 stop

5:25 am - 5:05 pmONT-HRL

9h 40m1 stop

$317Southwest

Find Deal

Wed, Dec 24 - Wed, Dec 31

12:10 pm - 10:53 pmHRL-ONT

12h 43m2 stops

6:10 am - 4:06 pmONT-HRL

7h 56m1 stop

$328United Airlines

Find Deal

Sat, Jan 17 - Tue, Jan 20

5:20 pm - 10:00 pmHRL-ONT

6h 40m1 stop

8:00 am - 4:04 pmONT-HRL

6h 04m1 stop

$331United Airlines

Find Deal

Tue, Mar 3 - Wed, Mar 4

12:10 pm - 8:50 pmHRL-ONT

10h 40m2 stops

8:00 am - 4:04 pmONT-HRL

6h 04m1 stop

$336United Airlines

Find Deal

Tue, Mar 3 - Wed, Mar 4

5:00 am - 2:50 pmHRL-ONT

11h 50m1 stop

5:25 am - 5:05 pmONT-HRL

9h 40m1 stop

$372Southwest

Find Deal

Mon, Dec 22 - Wed, Dec 31

9:20 am - 8:58 pmHRL-ONT

13h 38m2 stops

6:00 am - 8:01 pmONT-HRL

12h 01m2 stops

$377United Airlines

Find Deal

Sat, Jan 17 - Tue, Jan 20

12:10 pm - 8:50 pmHRL-ONT

10h 40m2 stops

6:37 pm - 11:16 amONT-HRL

14h 39m2 stops

$381United Airlines

Find Deal

Tue, Mar 3 - Wed, Mar 4

3:40 pm - 10:20 pmHRL-ONT

8h 40m2 stops

5:25 am - 5:05 pmONT-HRL

9h 40m1 stop

$382Southwest

Find Deal

Mon, Dec 22 - Wed, Dec 31

5:25 pm - 9:58 pmHRL-ONT

6h 33m1 stop

6:00 am - 4:04 pmONT-HRL

8h 04m1 stop

$398United Airlines

Find Deal

Tue, Feb 10 - Fri, Feb 13

5:20 pm - 9:52 pmHRL-ONT

6h 32m1 stop

6:10 am - 4:06 pmONT-HRL

7h 56m1 stop

$400United Airlines

Find Deal

Mon, Jan 5 - Sat, Jan 10

United Airlines flights from Harlingen, Texas to Ontario

Our best United Airlines deals on Harlingen, Texas to Ontario flight tickets

United Airlines

Jan 17

HRL12:10 pmHarlingen Valley Intl

12h 43m

2 stops

ONT10:53 pmOntario

Jan 20

ONT6:10 amOntario

7h 56m

1 stop

HRL4:06 pmHarlingen Valley Intl

$328

Find similar

United Airlines

Mar 3

HRL5:20 pmHarlingen Valley Intl

6h 40m

1 stop

ONT10:00 pmOntario

Mar 4

ONT8:00 amOntario

6h 04m

1 stop

HRL4:04 pmHarlingen Valley Intl

$331

Find similar

United Airlines

Mar 3

HRL12:10 pmHarlingen Valley Intl

10h 40m

2 stops

ONT8:50 pmOntario

Mar 4

ONT8:00 amOntario

6h 04m

1 stop

HRL4:04 pmHarlingen Valley Intl

$336

Find similar

Southwest flights from Harlingen, Texas to Ontario

Our best Southwest deals on Harlingen, Texas to Ontario flight tickets

Southwest

Dec 24

HRL7:30 amHarlingen Valley Intl

11h 50m

1 stop

ONT5:20 pmOntario

Dec 31

ONT5:25 amOntario

9h 40m

1 stop

HRL5:05 pmHarlingen Valley Intl

$317

Find similar

Southwest

Dec 22

HRL5:00 amHarlingen Valley Intl

11h 50m

1 stop

ONT2:50 pmOntario

Dec 31

ONT5:25 amOntario

9h 40m

1 stop

HRL5:05 pmHarlingen Valley Intl

$372

Find similar

Southwest

Dec 22

HRL3:40 pmHarlingen Valley Intl

8h 40m

2 stops

ONT10:20 pmOntario

Dec 31

ONT5:25 amOntario

9h 40m

1 stop

HRL5:05 pmHarlingen Valley Intl

$382

Find similar

momondo Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

HarlingenOntario

HRL - ONT

HRLONT

Harlingen Valley Intl

Wed 12/24

7:30 am-5:20 pm

1 stop11h 50m

Ontario

Wed 12/31

5:25 am-5:05 pm

1 stop9h 40m

$317

HarlingenOntario

HRL - ONT

HRLONT

Harlingen Valley Intl

Sat 1/17

12:10 pm-10:53 pm

2 stops12h 43m

Ontario

Tue 1/20

6:10 am-4:06 pm

1 stop7h 56m

$328

HarlingenOntario

HRL - ONT

HRLONT

Harlingen Valley Intl

Tue 3/3

5:20 pm-10:00 pm

1 stop6h 40m

Ontario

Wed 3/4

8:00 am-4:04 pm

1 stop6h 04m

$331

HarlingenOntario

HRL - ONT

HRLONT

Harlingen Valley Intl

Tue 3/3

12:10 pm-8:50 pm

2 stops10h 40m

Ontario

Wed 3/4

8:00 am-4:04 pm

1 stop6h 04m

$336

HarlingenOntario

HRL - ONT

HRLONT

Harlingen Valley Intl

Mon 12/22

5:00 am-2:50 pm

1 stop11h 50m

Ontario

Wed 12/31

5:25 am-5:05 pm

1 stop9h 40m

$372

HarlingenOntario

HRL - ONT

HRLONT

Harlingen Valley Intl

Sat 1/17

9:20 am-8:58 pm

2 stops13h 38m

Ontario

Tue 1/20

6:00 am-8:01 pm

2 stops12h 01m

$377

HarlingenOntario

HRL - ONT

HRLONT

Harlingen Valley Intl

Tue 3/3

12:10 pm-8:50 pm

2 stops10h 40m

Ontario

Wed 3/4

6:37 pm-11:16 am

2 stops14h 39m

$381

HarlingenOntario

HRL - ONT

HRLONT

Harlingen Valley Intl

Mon 12/22

3:40 pm-10:20 pm

2 stops8h 40m

Ontario

Wed 12/31

5:25 am-5:05 pm

1 stop9h 40m

$382

HarlingenOntario

HRL - ONT

HRLONT

Harlingen Valley Intl

Tue 2/10

5:25 pm-9:58 pm

1 stop6h 33m

Ontario

Fri 2/13

6:00 am-4:04 pm

1 stop8h 04m

$398

HarlingenOntario

HRL - ONT

HRLONT

Harlingen Valley Intl

Mon 1/5

5:20 pm-9:52 pm

1 stop6h 32m

Ontario

Sat 1/10

6:10 am-4:06 pm

1 stop7h 56m

$400

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Harlingen, Texas to Ontario

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

What is the cheapest day to depart on your flight to Ontario?

The cheapest day to depart on your flight to Ontario is on a Sunday when prices can be found for as low as $270. This is often the case because there is less demand to fly during this day of the week. When flying out on a Thursday, the most expensive travel day of the week, you can expect to see flight prices from Harlingen, Texas to Ontario for around $400.

What is the cheapest time of day to depart on your flight to Ontario?

In the morning is the cheapest time of day to fly from Harlingen, Texas to Ontario when you can find flight prices for as low as $320. Flying to Ontario in the morning is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are $385 on average. Flights to Ontario from Harlingen, Texas in the afternoon are generally more expensive because this time of day is more convenient for travelers’ schedules.

When to book flights from Harlingen, Texas to Ontario

Are you open to changing your travel dates? Check out the ideal times to fly from Harlingen, Texas to Ontario according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Harlingen, Texas to Ontario (HRL to ONT) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Harlingen, Texas to Ontario

Direct flights	None

There are no direct flights from Harlingen, Texas to Ontario. There are no popular flight routes from Harlingen, Texas to Ontario.

Search flight deals

How far is Harlingen Valley Intl to Ontario by plane?
There are 1306.7 mi between Harlingen Valley Intl and Ontario. 6h 02m is a normal flight duration for this route.
When did momondo last update prices for flights from Harlingen Valley Intl Airport to Ontario Airport?
Prices for flights from Harlingen Valley Intl Airport to Ontario Airport refresh daily.
How many operators does momondo search for flights from Harlingen Valley Intl Airport to Ontario Airport?
As of November 2025, there is 1 operator available to choose from for flights from Harlingen Valley Intl Airport to Ontario Airport.
How old do you have to be to fly from Harlingen Valley Intl Airport to Ontario Airport?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Harlingen Valley Intl Airport to Ontario Airport.
What documentation or ID do you need to fly to Ontario Airport?
The travel and health documents required for your trip to Ontario Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Ontario Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular airline from Harlingen, Texas to Ontario?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Harlingen, Texas to Ontario is American Airlines (100% of total bookings).

Best airlines flying from Harlingen, Texas to Ontario

Compare and see reviews for airlines that fly from Harlingen, Texas to Ontario with momondo

Airline	Rating	Free Cancellation	Price
American Airlines	PriceFrom $224	Free Cancellation	Rating 7.2 11,048 reviews		Search American Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Harlingen to Ontario?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Harlingen to Ontario. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Harlingen to Ontario with flexible booking policies on momondo?

Yes. All flights to Ontario from Harlingen on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Harlingen to Ontario?

momondo helps you find the best flight between Harlingen and Ontario by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Harlingen to Ontario right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Harlingen to Ontario now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Ontario and let you know when they change.