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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 10/20. 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

American Airlines Logo
3:09 pm - 12:04 amONT-HRL
6h 55m1 stop
American Airlines Logo
5:50 am - 9:29 amHRL-ONT
5h 39m1 stop
$384American Airlines
Find Deal
Tue, Mar 10 - Wed, Mar 11
American Airlines Logo
10:30 am - 12:04 amONT-HRL
11h 34m2 stops
American Airlines Logo
5:50 am - 9:29 amHRL-ONT
5h 39m1 stop
$389American Airlines
Find Deal
Tue, Mar 10 - Wed, Mar 11
United Airlines Logo
5:40 am - 7:29 pmONT-HRL
11h 49m2 stops
United Airlines Logo
2:00 pm - 10:45 pmHRL-ONT
10h 45m2 stops
$459United Airlines
Find Deal
Tue, Mar 10 - Wed, Mar 11
United Airlines Logo
6:00 am - 4:13 pmONT-HRL
8h 13m1 stop
United Airlines Logo
5:17 pm - 9:24 pmHRL-ONT
6h 07m1 stop
$498United Airlines
Find Deal
Fri, Sep 26 - Tue, Sep 30
United Airlines Logo
6:00 am - 4:13 pmONT-HRL
8h 13m1 stop
United Airlines Logo
7:00 am - 3:02 pmHRL-ONT
10h 02m2 stops
$503United Airlines
Find Deal
Fri, Sep 26 - Tue, Sep 30
United Airlines Logo
1:15 pm - 11:18 pmONT-HRL
8h 03m2 stops
United Airlines Logo
5:00 am - 3:02 pmHRL-ONT
12h 02m2 stops
$508United Airlines
Find Deal
Fri, Sep 26 - Tue, Sep 30
United Airlines Logo
6:05 am - 3:59 pmONT-HRL
7h 54m1 stop
United Airlines Logo
5:00 pm - 9:49 pmHRL-ONT
6h 49m1 stop
$571United Airlines
Find Deal
Wed, Nov 26 - Mon, Dec 1
United Airlines Logo
1:15 pm - 11:18 pmONT-HRL
8h 03m2 stops
United Airlines Logo
5:17 pm - 9:24 pmHRL-ONT
6h 07m1 stop
$597United Airlines
Find Deal
Fri, Oct 3 - Sun, Oct 5
United Airlines Logo
9:36 am - 11:18 pmONT-HRL
11h 42m2 stops
United Airlines Logo
5:00 am - 12:13 pmHRL-ONT
9h 13m2 stops
$602United Airlines
Find Deal
Fri, Oct 3 - Sun, Oct 5
American Airlines Logo
6:10 am - 2:18 pmONT-HRL
6h 08m1 stop
American Airlines Logo
8:11 pm - 11:46 pmHRL-ONT
5h 35m1 stop
$718American Airlines
Find Deal
Sun, Dec 21 - Sat, Dec 27

United Airlines flights from Ontario to Harlingen, Texas

Our best United Airlines deals on Ontario to Harlingen, Texas flight tickets
United Airlines
Mar 10
ONT5:40 amOntario
11h 49m
2 stops
HRL7:29 pmHarlingen Valley Intl
Mar 11
HRL2:00 pmHarlingen Valley Intl
10h 45m
2 stops
ONT10:45 pmOntario
$459
Find similar
United Airlines
Sep 26
ONT6:00 amOntario
8h 13m
1 stop
HRL4:13 pmHarlingen Valley Intl
Sep 30
HRL5:17 pmHarlingen Valley Intl
6h 07m
1 stop
ONT9:24 pmOntario
$498
Find similar
United Airlines
Sep 26
ONT6:00 amOntario
8h 13m
1 stop
HRL4:13 pmHarlingen Valley Intl
Sep 30
HRL7:00 amHarlingen Valley Intl
10h 02m
2 stops
ONT3:02 pmOntario
$503
Find similar

American Airlines flights from Ontario to Harlingen, Texas

Our best American Airlines deals on Ontario to Harlingen, Texas flight tickets
American Airlines
Mar 10
ONT3:09 pmOntario
6h 55m
1 stop
HRL12:04 amHarlingen Valley Intl
Mar 11
HRL5:50 amHarlingen Valley Intl
5h 39m
1 stop
ONT9:29 amOntario
$384
Find similar
American Airlines
Mar 10
ONT10:30 amOntario
11h 34m
2 stops
HRL12:04 amHarlingen Valley Intl
Mar 11
HRL5:50 amHarlingen Valley Intl
5h 39m
1 stop
ONT9:29 amOntario
$389
Find similar
American Airlines
Dec 21
ONT6:10 amOntario
6h 08m
1 stop
HRL2:18 pmHarlingen Valley Intl
Dec 27
HRL8:11 pmHarlingen Valley Intl
5h 35m
1 stop
ONT11:46 pmOntario
$718
Find similar

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 September 16, 2025.
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

Tue 3/10

3:09 pm-12:04 am

1 stop6h 55m

Harlingen Valley Intl

Wed 3/11

5:50 am-9:29 am

1 stop5h 39m

$384

OntarioHarlingen

ONT - HRL

ONTHRL

Ontario

Tue 3/10

10:30 am-12:04 am

2 stops11h 34m

Harlingen Valley Intl

Wed 3/11

5:50 am-9:29 am

1 stop5h 39m

$389

OntarioHarlingen

ONT - HRL

ONTHRL

Ontario

Tue 3/10

5:40 am-7:29 pm

2 stops11h 49m

Harlingen Valley Intl

Wed 3/11

2:00 pm-10:45 pm

2 stops10h 45m

$459

OntarioHarlingen

ONT - HRL

ONTHRL

Ontario

Fri 9/26

6:00 am-4:13 pm

1 stop8h 13m

Harlingen Valley Intl

Tue 9/30

5:17 pm-9:24 pm

1 stop6h 07m

$498

OntarioHarlingen

ONT - HRL

ONTHRL

Ontario

Fri 9/26

6:00 am-4:13 pm

1 stop8h 13m

Harlingen Valley Intl

Tue 9/30

7:00 am-3:02 pm

2 stops10h 02m

$503

OntarioHarlingen

ONT - HRL

ONTHRL

Ontario

Fri 9/26

1:15 pm-11:18 pm

2 stops8h 03m

Harlingen Valley Intl

Tue 9/30

5:00 am-3:02 pm

2 stops12h 02m

$508

OntarioHarlingen

ONT - HRL

ONTHRL

Ontario

Wed 11/26

6:05 am-3:59 pm

1 stop7h 54m

Harlingen Valley Intl

Mon 12/1

5:00 pm-9:49 pm

1 stop6h 49m

$571

OntarioHarlingen

ONT - HRL

ONTHRL

Ontario

Fri 10/3

1:15 pm-11:18 pm

2 stops8h 03m

Harlingen Valley Intl

Sun 10/5

5:17 pm-9:24 pm

1 stop6h 07m

$597

OntarioHarlingen

ONT - HRL

ONTHRL

Ontario

Fri 10/3

9:36 am-11:18 pm

2 stops11h 42m

Harlingen Valley Intl

Sun 10/5

5:00 am-12:13 pm

2 stops9h 13m

$602

OntarioHarlingen

ONT - HRL

ONTHRL

Ontario

Sun 12/21

6:10 am-2:18 pm

1 stop6h 08m

Harlingen Valley Intl

Sat 12/27

8:11 pm-11:46 pm

1 stop5h 35m

$718

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 13 resultsSorted by cheapest first
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See travel insights to Harlingen from

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

What is the cheapest day to depart on your flight to Harlingen, Texas?

The cheapest day to depart on your flight to Harlingen, Texas is on a Wednesday when prices can be found for as low as $285. This is often the case because there is less demand to fly during this day of the week. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from Ontario to Harlingen, Texas for around $488.

What is the cheapest time of day to depart on your flight to Harlingen, Texas?

Our most recent data shows that the best time of day to fly to Harlingen, Texas is at noon. Flights from Ontario to Harlingen, Texas during this time can be as low as $293. Flights in the morning are often more expensive with an average ticket price of $415.

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

Direct flights

None
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 6h 03m.

  • 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
10,000 reviews
Search American Airlines flights
SouthwestPriceFrom $250Free CancellationRating
8.0
4,242 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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