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Cheap flights from Ontario to Harlingen from $215

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 10/11. 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.
United Airlines Logo
6:00 am - 4:01 pmONT  Ontario-HRL Harlingen Valley Intl
8h 01m1 stop Houston George Bush Intcntl
United Airlines Logo
7:10 am - 6:01 pmHRL  Harlingen Valley Intl-ONT Ontario
12h 51m2 stops Houston George Bush Intcntl San Francisco
$318United Airlines
Tue, Oct 27 - Sat, Oct 31
United Airlines Logo
9:25 am - 10:48 pmONT  Ontario-HRL Harlingen Valley Intl
11h 23m2 stops San Francisco Houston George Bush Intcntl
United Airlines Logo
1:59 pm - 8:51 pmHRL  Harlingen Valley Intl-ONT Ontario
8h 52m2 stops Houston George Bush Intcntl Denver Intl
$323United Airlines
Tue, Oct 27 - Sat, Oct 31
United Airlines Logo
9:25 am - 10:48 pmONT  Ontario-HRL Harlingen Valley Intl
11h 23m2 stops San Francisco Houston George Bush Intcntl
United Airlines Logo
7:10 am - 6:01 pmHRL  Harlingen Valley Intl-ONT Ontario
12h 51m2 stops Houston George Bush Intcntl San Francisco
$323United Airlines
Tue, Oct 27 - Sat, Oct 31
American Airlines Logo
2:22 pm - 10:48 pmONT  Ontario-HRL Harlingen Valley Intl
6h 26m1 stop Dallas/Fort Worth
American Airlines Logo
5:51 am - 9:29 amHRL  Harlingen Valley Intl-ONT Ontario
5h 38m1 stop Dallas/Fort Worth
$339American Airlines
Wed, Sep 9 - Sat, Sep 12
Southwest Logo
6:40 am - 3:50 pmONT  Ontario-HRL Harlingen Valley Intl
7h 10m2 stops Phoenix Sky Harbor Intl Houston Hobby
Southwest Logo
11:30 am - 4:00 pmHRL  Harlingen Valley Intl-ONT Ontario
6h 30m1 stop Dallas Love Field
$344Southwest
Wed, Sep 9 - Sat, Sep 12
American Airlines Logo
2:22 pm - 10:48 pmONT  Ontario-HRL Harlingen Valley Intl
6h 26m1 stop Dallas/Fort Worth
American Airlines Logo
5:51 am - 9:29 amHRL  Harlingen Valley Intl-ONT Ontario
5h 38m1 stop Dallas/Fort Worth
$354American Airlines
Wed, Sep 30 - Sun, Oct 4
American Airlines Logo
2:22 pm - 10:48 pmONT  Ontario-HRL Harlingen Valley Intl
6h 26m1 stop Dallas/Fort Worth
American Airlines Logo
5:51 am - 9:29 amHRL  Harlingen Valley Intl-ONT Ontario
5h 38m1 stop Dallas/Fort Worth
$355American Airlines
Wed, Sep 30 - Sun, Oct 4
American Airlines Logo
6:15 am - 10:48 pmONT  Ontario-HRL Harlingen Valley Intl
14h 33m2 stops Phoenix Sky Harbor Intl Dallas/Fort Worth
American Airlines Logo
5:51 am - 9:29 amHRL  Harlingen Valley Intl-ONT Ontario
5h 38m1 stop Dallas/Fort Worth
$364American Airlines
Wed, Sep 30 - Sun, Oct 4
Southwest Logo
6:40 am - 3:50 pmONT  Ontario-HRL Harlingen Valley Intl
7h 10m2 stops Phoenix Sky Harbor Intl Houston Hobby
Southwest Logo
12:35 pm - 8:55 pmHRL  Harlingen Valley Intl-ONT Ontario
10h 20m2 stops Houston Hobby Denver Intl
$372Southwest
Wed, Sep 9 - Sat, Sep 12
American Airlines Logo
6:00 am - 4:27 pmONT  Ontario-HRL Harlingen Valley Intl
8h 27m1 stop Dallas/Fort Worth
American Airlines Logo
8:00 pm - 11:36 pmHRL  Harlingen Valley Intl-ONT Ontario
5h 36m1 stop Dallas/Fort Worth
$374American Airlines
Thu, Sep 3 - Thu, Sep 10

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United Airlines flights from Ontario to Harlingen

Our best United Airlines deals on Ontario to Harlingen flight tickets
United Airlines
Oct 27
ONT6:00 amOntario
8h 01m
1 stop
HRL4:01 pmHarlingen Valley Intl
Oct 31
HRL7:10 amHarlingen Valley Intl
12h 51m
2 stops
ONT6:01 pmOntario
$318
United Airlines
Oct 27
ONT9:25 amOntario
11h 23m
2 stops
HRL10:48 pmHarlingen Valley Intl
Oct 31
HRL7:10 amHarlingen Valley Intl
12h 51m
2 stops
ONT6:01 pmOntario
$323
United Airlines
Oct 27
ONT6:00 amOntario
8h 01m
1 stop
HRL4:01 pmHarlingen Valley Intl
Oct 31
HRL5:05 amHarlingen Valley Intl
9h 28m
2 stops
ONT12:33 pmOntario
$434

American Airlines flights from Ontario to Harlingen

Our best American Airlines deals on Ontario to Harlingen flight tickets
American Airlines
Sep 9
ONT2:22 pmOntario
6h 26m
1 stop
HRL10:48 pmHarlingen Valley Intl
Sep 12
HRL5:51 amHarlingen Valley Intl
5h 38m
1 stop
ONT9:29 amOntario
$339
American Airlines
Sep 30
ONT2:22 pmOntario
6h 26m
1 stop
HRL10:48 pmHarlingen Valley Intl
Oct 4
HRL5:51 amHarlingen Valley Intl
5h 38m
1 stop
ONT9:29 amOntario
$354
American Airlines
Sep 30
ONT2:22 pmOntario
6h 26m
1 stop
HRL10:48 pmHarlingen Valley Intl
Oct 4
HRL5:51 amHarlingen Valley Intl
5h 38m
1 stop
ONT9:29 amOntario
$355

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 August 17, 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 Ontario - HRL Harlingen Valley Intl

ONTHRL

Ontario

Tue 10/27

6:00 am-4:01 pm

1 stop8h 01m

Harlingen Valley Intl

Sat 10/31

7:10 am-6:01 pm

2 stops12h 51m

$318

OntarioHarlingen

ONT Ontario - HRL Harlingen Valley Intl

ONTHRL

Ontario

Tue 10/27

9:25 am-10:48 pm

2 stops11h 23m

Harlingen Valley Intl

Sat 10/31

1:59 pm-8:51 pm

2 stops8h 52m

$323

OntarioHarlingen

ONT Ontario - HRL Harlingen Valley Intl

ONTHRL

Ontario

Tue 10/27

9:25 am-10:48 pm

2 stops11h 23m

Harlingen Valley Intl

Sat 10/31

7:10 am-6:01 pm

2 stops12h 51m

$323
Quickest round-trip

OntarioHarlingen

ONT Ontario - HRL Harlingen Valley Intl

ONTHRL

Ontario

Wed 9/9

2:22 pm-10:48 pm

1 stop6h 26m

Harlingen Valley Intl

Sat 9/12

5:51 am-9:29 am

1 stop5h 38m

$339

OntarioHarlingen

ONT Ontario - HRL Harlingen Valley Intl

ONTHRL

Ontario

Wed 9/9

6:40 am-3:50 pm

2 stops7h 10m

Harlingen Valley Intl

Sat 9/12

11:30 am-4:00 pm

1 stop6h 30m

$344

OntarioHarlingen

ONT Ontario - HRL Harlingen Valley Intl

ONTHRL

Ontario

Wed 9/30

2:22 pm-10:48 pm

1 stop6h 26m

Harlingen Valley Intl

Sun 10/4

5:51 am-9:29 am

1 stop5h 38m

$354

OntarioHarlingen

ONT Ontario - HRL Harlingen Valley Intl

ONTHRL

Ontario

Wed 9/30

2:22 pm-10:48 pm

1 stop6h 26m

Harlingen Valley Intl

Sun 10/4

5:51 am-9:29 am

1 stop5h 38m

$355

OntarioHarlingen

ONT Ontario - HRL Harlingen Valley Intl

ONTHRL

Ontario

Wed 9/30

6:15 am-10:48 pm

2 stops14h 33m

Harlingen Valley Intl

Sun 10/4

5:51 am-9:29 am

1 stop5h 38m

$364

OntarioHarlingen

ONT Ontario - HRL Harlingen Valley Intl

ONTHRL

Ontario

Wed 9/9

6:40 am-3:50 pm

2 stops7h 10m

Harlingen Valley Intl

Sat 9/12

12:35 pm-8:55 pm

2 stops10h 20m

$372

OntarioHarlingen

ONT Ontario - HRL Harlingen Valley Intl

ONTHRL

Ontario

Thu 9/3

6:00 am-4:27 pm

1 stop8h 27m

Harlingen Valley Intl

Thu 9/10

8:00 pm-11:36 pm

1 stop5h 36m

$374

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 19 resultsSorted by cheapest first
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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

Best Price Found

$215

Fastest flight time

7h 59m

Direct flights

None
The best one-way flight to Harlingen from Ontario in the past 72 hours is $215. The best round-trip flight deal from Ontario to Harlingen found on momondo in the last 72 hours is $318.
The fastest flight from Ontario to Harlingen takes 7h 59m
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 7h 59m.

  • 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
American AirlinesPriceFrom $256Free CancellationRating
7.1
11,945 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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