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Cheap flights from Ontario to Harlingen from $170

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Harlingen departing on 3/15. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Ontario to Harlingen

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
6:00 am - 4:04 pm
ONT
-
HRL
8h 04m
1 stop
United Airlines Logo
5:22 pm - 10:00 pm
HRL
-
ONT
6h 38m
1 stop
$374United Airlines
Sat, Feb 21 - Mon, Feb 23
United Airlines Logo
8:00 am - 4:04 pm
ONT
-
HRL
6h 04m
1 stop
United Airlines Logo
5:22 pm - 9:59 pm
HRL
-
ONT
6h 37m
1 stop
$491United Airlines
Tue, Feb 24 - Wed, Feb 25
United Airlines Logo
6:00 am - 4:04 pm
ONT
-
HRL
8h 04m
1 stop
United Airlines Logo
5:25 pm - 10:36 pm
HRL
-
ONT
7h 11m
1 stop
$506United Airlines
Sat, Mar 7 - Sat, Mar 14
United Airlines Logo
6:37 pm - 11:16 am
ONT
-
HRL
14h 39m
2 stops
United Airlines Logo
5:25 pm - 10:36 pm
HRL
-
ONT
7h 11m
1 stop
$511United Airlines
Thu, Mar 5 - Mon, Mar 9
United Airlines Logo
5:00 am - 7:58 pm
ONT
-
HRL
12h 58m
2 stops
United Airlines Logo
5:22 pm - 10:00 pm
HRL
-
ONT
6h 38m
1 stop
$529United Airlines
Sat, Feb 21 - Mon, Feb 23
United Airlines Logo
6:00 am - 4:04 pm
ONT
-
HRL
8h 04m
1 stop
United Airlines Logo
5:25 pm - 10:36 pm
HRL
-
ONT
7h 11m
1 stop
$585United Airlines
Sun, Mar 8 - Sun, Mar 15
United Airlines Logo
5:00 am - 9:59 pm
ONT
-
HRL
14h 59m
2 stops
United Airlines Logo
5:22 pm - 9:59 pm
HRL
-
ONT
6h 37m
1 stop
$615United Airlines
Tue, Feb 24 - Wed, Feb 25
United Airlines Logo
6:00 am - 4:04 pm
ONT
-
HRL
8h 04m
1 stop
United Airlines Logo
5:25 pm - 10:36 pm
HRL
-
ONT
7h 11m
1 stop
$635United Airlines
Fri, Mar 13 - Mon, Mar 16
United Airlines Logo
6:00 am - 4:04 pm
ONT
-
HRL
8h 04m
1 stop
United Airlines Logo
5:22 pm - 9:59 pm
HRL
-
ONT
6h 37m
1 stop
$687United Airlines
Sun, Feb 22 - Sun, Mar 1
United Airlines Logo
6:37 pm - 10:16 am
ONT
-
HRL
13h 39m
2 stops
United Airlines Logo
12:10 pm - 10:57 pm
HRL
-
ONT
12h 47m
2 stops
$688United Airlines
Sat, Mar 7 - Sat, Mar 14

United Airlines flights from Ontario to Harlingen, Texas

Our best United Airlines deals on Ontario to Harlingen, Texas flight tickets
United Airlines
Feb 14
ONT6:00 amOntario
8h 04m
1 stop
HRL4:04 pmHarlingen Valley Intl
Feb 18
HRL12:10 pmHarlingen Valley Intl
12h 47m
2 stops
ONT10:57 pmOntario
$282
United Airlines
Feb 14
ONT6:00 amOntario
8h 04m
1 stop
HRL4:04 pmHarlingen Valley Intl
Feb 18
HRL12:10 pmHarlingen Valley Intl
12h 47m
2 stops
ONT10:57 pmOntario
$348
United Airlines
Feb 21
ONT6:00 amOntario
8h 04m
1 stop
HRL4:04 pmHarlingen Valley Intl
Feb 23
HRL5:22 pmHarlingen Valley Intl
6h 38m
1 stop
ONT10:00 pmOntario
$374

momondo Fare Finder

 
Customize your flight search to find flights from Ontario to Harlingen, Texas 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, momondo users made 832,500 searches. Data last updated February 8, 2026.
Use the filters below to find and compare flights from Ontario to Harlingen, Texas that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

OntarioHarlingen

ONT - HRL

ONTHRL

Ontario

Sat 2/21

6:00 am-4:04 pm

1 stop8h 04m

Harlingen Valley Intl

Mon 2/23

5:22 pm-10:00 pm

1 stop6h 38m

$374

OntarioHarlingen

ONT - HRL

ONTHRL

Ontario

Tue 2/24

8:00 am-4:04 pm

1 stop6h 04m

Harlingen Valley Intl

Wed 2/25

5:22 pm-9:59 pm

1 stop6h 37m

$491

OntarioHarlingen

ONT - HRL

ONTHRL

Ontario

Sat 3/7

6:00 am-4:04 pm

1 stop8h 04m

Harlingen Valley Intl

Sat 3/14

5:25 pm-10:36 pm

1 stop7h 11m

$506

OntarioHarlingen

ONT - HRL

ONTHRL

Ontario

Thu 3/5

6:37 pm-11:16 am

2 stops14h 39m

Harlingen Valley Intl

Mon 3/9

5:25 pm-10:36 pm

1 stop7h 11m

$511

OntarioHarlingen

ONT - HRL

ONTHRL

Ontario

Sat 2/21

5:00 am-7:58 pm

2 stops12h 58m

Harlingen Valley Intl

Mon 2/23

5:22 pm-10:00 pm

1 stop6h 38m

$529

OntarioHarlingen

ONT - HRL

ONTHRL

Ontario

Sun 3/8

6:00 am-4:04 pm

1 stop8h 04m

Harlingen Valley Intl

Sun 3/15

5:25 pm-10:36 pm

1 stop7h 11m

$585

OntarioHarlingen

ONT - HRL

ONTHRL

Ontario

Tue 2/24

5:00 am-9:59 pm

2 stops14h 59m

Harlingen Valley Intl

Wed 2/25

5:22 pm-9:59 pm

1 stop6h 37m

$615

OntarioHarlingen

ONT - HRL

ONTHRL

Ontario

Fri 3/13

6:00 am-4:04 pm

1 stop8h 04m

Harlingen Valley Intl

Mon 3/16

5:25 pm-10:36 pm

1 stop7h 11m

$635

OntarioHarlingen

ONT - HRL

ONTHRL

Ontario

Sun 2/22

6:00 am-4:04 pm

1 stop8h 04m

Harlingen Valley Intl

Sun 3/1

5:22 pm-9:59 pm

1 stop6h 37m

$687

OntarioHarlingen

ONT - HRL

ONTHRL

Ontario

Sat 3/7

6:37 pm-10:16 am

2 stops13h 39m

Harlingen Valley Intl

Sat 3/14

12:10 pm-10:57 pm

2 stops12h 47m

$688

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 17 resultsSorted by cheapest first
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How to get the cheapest flight ticket from Ontario to Harlingen, Texas

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

Can stopping save me money on Ontario to Harlingen, Texas flights?

You could potentially save up to 1% on your flight if you consider stops on a Ontario to Harlingen, Texas flight.

When to book flights from Ontario to Harlingen, Texas

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

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

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

Fastest flight time

7h 20m

Direct flights

None
The fastest flight from Ontario to Harlingen, Texas takes 7h 20m
There are no direct flights from Ontario to Harlingen, Texas. There are no popular flight routes from Ontario to Harlingen, Texas.
Search flight deals

  • How far is Ontario to Harlingen Valley Intl by plane?

    The straight-line distance from Ontario to Harlingen Valley Intl is 1306.7 mi. By plane, this route typically takes 7h 20m.

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

    Prices for flights from Ontario Airport to Harlingen Valley Intl Airport are refreshed on a daily basis.

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

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

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario Airport to Harlingen Valley Intl Airport.

  • What documentation or ID do you need to fly to Harlingen Valley Intl Airport?

    The necessary travel and health documents for your Harlingen Valley Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from Ontario to Harlingen, Texas?

Best airlines flying from Ontario to Harlingen, Texas

Compare and see reviews for airlines that fly from Ontario to Harlingen, Texas with momondo
Airline
Rating
Free Cancellation
Price
American AirlinesPriceFrom $174Free CancellationRating
7.2
11,258 reviews
Search American Airlines flights
SouthwestPriceFrom $250Free CancellationRating
8.0
4,282 reviews
Search Southwest flights

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Harlingen from Ontario.

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

momondo does allow users to show only those flights to Harlingen from Ontario which offer a flexible booking policy as well as other useful filters and features.

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

Once you have performed a search for Ontario to Harlingen flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

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

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