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Cheap flights from Ontario to Harlingen from $144

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 8/1. 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
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Ontario to Harlingen

Cheap round-trip flights

Enter your travel dates to find the best prices.
Southwest Logo
7:05 am - 2:55 pm
ONT
-
HRL
5h 50m
1 stop
Southwest Logo
11:30 am - 4:00 pm
HRL
-
ONT
6h 30m
1 stop
$257Southwest
Sat, Aug 22 - Sat, Aug 29
Southwest Logo
10:15 am - 6:50 pm
ONT
-
HRL
6h 35m
2 stops
Southwest Logo
6:05 am - 9:35 am
HRL
-
ONT
5h 30m
1 stop
$262Southwest
Sat, Aug 22 - Sat, Aug 29
Southwest Logo
5:40 am - 3:50 pm
ONT
-
HRL
8h 10m
2 stops
Southwest Logo
6:05 am - 11:15 am
HRL
-
ONT
7h 10m
2 stops
$267Southwest
Sat, Aug 22 - Sat, Aug 29
Southwest Logo
12:50 pm - 8:30 pm
ONT
-
HRL
5h 40m
1 stop
Southwest Logo
6:35 am - 11:50 am
HRL
-
ONT
7h 15m
1 stop
$308Southwest
Thu, Aug 20 - Tue, Aug 25
Southwest Logo
12:50 pm - 8:30 pm
ONT
-
HRL
5h 40m
1 stop
Southwest Logo
4:25 pm - 8:55 pm
HRL
-
ONT
6h 30m
2 stops
$313Southwest
Thu, Aug 20 - Tue, Aug 25
Southwest Logo
5:40 am - 4:05 pm
ONT
-
HRL
8h 25m
2 stops
Southwest Logo
7:25 am - 12:40 pm
HRL
-
ONT
7h 15m
2 stops
$318Southwest
Thu, Aug 20 - Tue, Aug 25
United Airlines Logo
5:00 am - 3:59 pm
ONT
-
HRL
8h 59m
2 stops
United Airlines Logo
7:15 am - 8:01 pm
HRL
-
ONT
14h 46m
2 stops
$518United Airlines
Tue, Sep 1 - Wed, Sep 2
United Airlines Logo
9:15 am - 9:52 pm
ONT
-
HRL
10h 37m
1 stop
United Airlines Logo
7:15 am - 8:01 pm
HRL
-
ONT
14h 46m
2 stops
$587United Airlines
Tue, Sep 1 - Wed, Sep 2
United Airlines Logo
5:00 am - 3:59 pm
ONT
-
HRL
8h 59m
2 stops
United Airlines Logo
1:59 pm - 6:11 pm
HRL
-
ONT
30h 12m
2 stops
$592United Airlines
Tue, Sep 1 - Wed, Sep 2
United Airlines Logo
5:00 am - 3:59 pm
ONT
-
HRL
8h 59m
2 stops
United Airlines Logo
1:59 pm - 6:11 pm
HRL
-
ONT
30h 12m
2 stops
$593United Airlines
Tue, Sep 1 - Wed, Sep 2

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Southwest flights from Ontario to Harlingen

Our best Southwest deals on Ontario to Harlingen flight tickets
Southwest
Aug 22
ONT7:05 amOntario
5h 50m
1 stop
HRL2:55 pmHarlingen Valley Intl
Aug 29
HRL11:30 amHarlingen Valley Intl
6h 30m
1 stop
ONT4:00 pmOntario
$257
Southwest
Aug 22
ONT10:15 amOntario
6h 35m
2 stops
HRL6:50 pmHarlingen Valley Intl
Aug 29
HRL6:05 amHarlingen Valley Intl
5h 30m
1 stop
ONT9:35 amOntario
$262
Southwest
Aug 22
ONT5:40 amOntario
8h 10m
2 stops
HRL3:50 pmHarlingen Valley Intl
Aug 29
HRL6:05 amHarlingen Valley Intl
7h 10m
2 stops
ONT11:15 amOntario
$267

United Airlines flights from Ontario to Harlingen

Our best United Airlines deals on Ontario to Harlingen flight tickets
United Airlines
Sep 1
ONT5:00 amOntario
8h 59m
2 stops
HRL3:59 pmHarlingen Valley Intl
Sep 2
HRL7:15 amHarlingen Valley Intl
14h 46m
2 stops
ONT8:01 pmOntario
$518
United Airlines
Sep 1
ONT9:15 amOntario
10h 37m
1 stop
HRL9:52 pmHarlingen Valley Intl
Sep 2
HRL7:15 amHarlingen Valley Intl
14h 46m
2 stops
ONT8:01 pmOntario
$587
United Airlines
Sep 1
ONT5:00 amOntario
8h 59m
2 stops
HRL3:59 pmHarlingen Valley Intl
Sep 2
HRL1:59 pmHarlingen Valley Intl
30h 12m
2 stops
ONT6:11 pmOntario
$592

momondo Fare Finder

 
Customize your flight search to find flights from Ontario to Harlingen 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 July 3, 2026.
Use the filters below to find and compare flights from Ontario to Harlingen that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioHarlingen

ONT - HRL

ONTHRL

Ontario

Sat 8/22

7:05 am-2:55 pm

1 stop5h 50m

Harlingen Valley Intl

Sat 8/29

11:30 am-4:00 pm

1 stop6h 30m

$257
Quickest round-trip

OntarioHarlingen

ONT - HRL

ONTHRL

Ontario

Sat 8/22

10:15 am-6:50 pm

2 stops6h 35m

Harlingen Valley Intl

Sat 8/29

6:05 am-9:35 am

1 stop5h 30m

$262

OntarioHarlingen

ONT - HRL

ONTHRL

Ontario

Sat 8/22

5:40 am-3:50 pm

2 stops8h 10m

Harlingen Valley Intl

Sat 8/29

6:05 am-11:15 am

2 stops7h 10m

$267

OntarioHarlingen

ONT - HRL

ONTHRL

Ontario

Thu 8/20

12:50 pm-8:30 pm

1 stop5h 40m

Harlingen Valley Intl

Tue 8/25

6:35 am-11:50 am

1 stop7h 15m

$308

OntarioHarlingen

ONT - HRL

ONTHRL

Ontario

Thu 8/20

12:50 pm-8:30 pm

1 stop5h 40m

Harlingen Valley Intl

Tue 8/25

4:25 pm-8:55 pm

2 stops6h 30m

$313

OntarioHarlingen

ONT - HRL

ONTHRL

Ontario

Thu 8/20

5:40 am-4:05 pm

2 stops8h 25m

Harlingen Valley Intl

Tue 8/25

7:25 am-12:40 pm

2 stops7h 15m

$318

OntarioHarlingen

ONT - HRL

ONTHRL

Ontario

Tue 9/1

5:00 am-3:59 pm

2 stops8h 59m

Harlingen Valley Intl

Wed 9/2

7:15 am-8:01 pm

2 stops14h 46m

$518

OntarioHarlingen

ONT - HRL

ONTHRL

Ontario

Tue 9/1

9:15 am-9:52 pm

1 stop10h 37m

Harlingen Valley Intl

Wed 9/2

7:15 am-8:01 pm

2 stops14h 46m

$587

OntarioHarlingen

ONT - HRL

ONTHRL

Ontario

Tue 9/1

5:00 am-3:59 pm

2 stops8h 59m

Harlingen Valley Intl

Wed 9/2

1:59 pm-6:11 pm

2 stops30h 12m

$592

OntarioHarlingen

ONT - HRL

ONTHRL

Ontario

Tue 9/1

5:00 am-3:59 pm

2 stops8h 59m

Harlingen Valley Intl

Wed 9/2

1:59 pm-6:11 pm

2 stops30h 12m

$593

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 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

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 flights?

You could potentially save up to 17% on your flight if you consider stops on a Ontario to Harlingen flight.

When to book flights from Ontario to Harlingen

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

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

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

Fastest flight time

5h 40m

Direct flights

None
The fastest flight from Ontario to Harlingen takes 5h 40m
There are no direct flights from Ontario to Harlingen. There are no popular flight routes from Ontario to Harlingen.
Search flight deals

Frequently asked questions about flying from Ontario to Harlingen

  • 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 5h 40m.

  • 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?

Best airlines flying from Ontario to Harlingen

Compare and see reviews for airlines that fly from Ontario to Harlingen with momondo
Airline
Rating
Free Cancellation
Price
SouthwestPriceFrom $250Free CancellationRating
7.9
4,250 reviews
Search Southwest flights
American AirlinesPriceFrom $256Free CancellationRating
7.1
11,766 reviews
Search American Airlines 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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