ONT - HRL

$160 Find Cheap Flights from Ontario to Harlingen

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Ontario to Harlingen departing on 7/3. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to Harlingen

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to Harlingen, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to Harlingen, as well as popular online travel agencies
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Flights Deals

Cheap Flights from Ontario to Harlingen (ONT-HRL)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Ontario to Harlingen that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Ontario to Harlingen

Tue, Jul 1 - Sun, Jul 6
United Airlines Logo
6:00 am - 1:20 pmONT-HRL
5h 20m1 stop
United Airlines Logo
7:10 am - 5:43 pmHRL-ONT
12h 33m2 stops
$633United Airlines
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Wed, Jul 2 - Sun, Jul 6
American Airlines Logo
2:40 pm - 12:04 amONT-HRL
7h 24m1 stop
American Airlines Logo
7:59 pm - 11:54 pmHRL-ONT
5h 55m1 stop
$683American Airlines
Find Deal
Wed, Jul 2 - Sun, Jul 6
American Airlines Logo
12:55 pm - 12:04 amONT-HRL
9h 09m2 stops
American Airlines Logo
7:59 pm - 11:54 pmHRL-ONT
5h 55m1 stop
$688American Airlines
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Mon, Jun 30 - Mon, Jul 7
United Airlines Logo
6:00 am - 4:00 pmONT-HRL
8h 00m1 stop
United Airlines Logo
5:10 am - 9:37 pmHRL-ONT
18h 27m1 stop
$727United Airlines
Find Deal
Mon, Jun 30 - Mon, Jul 7
United Airlines Logo
6:00 am - 4:00 pmONT-HRL
8h 00m1 stop
United Airlines Logo
5:10 am - 12:32 pmHRL-ONT
9h 22m2 stops
$784United Airlines
Find Deal
Tue, Jul 1 - Sun, Jul 6
United Airlines Logo
6:00 am - 1:20 pmONT-HRL
5h 20m1 stop
United Airlines Logo
1:59 pm - 9:37 pmHRL-ONT
9h 38m1 stop
$851United Airlines
Find Deal
Wed, Jul 2 - Sun, Jul 6
American Airlines Logo
12:55 pm - 12:04 amONT-HRL
9h 09m2 stops
American Airlines Logo
10:07 am - 6:08 pmHRL-ONT
10h 01m2 stops
$859American Airlines
Find Deal
Mon, Jun 30 - Mon, Jul 7
United Airlines Logo
6:00 am - 4:00 pmONT-HRL
8h 00m1 stop
United Airlines Logo
5:10 am - 9:37 pmHRL-ONT
18h 27m1 stop
$917United Airlines
Find Deal
Wed, Jul 2 - Sun, Jul 6
United Airlines Logo
6:00 am - 1:20 pmONT-HRL
5h 20m1 stop
United Airlines Logo
5:20 pm - 9:37 pmHRL-ONT
6h 17m1 stop
$1,059United Airlines
Find Deal
Wed, Jul 2 - Sun, Jul 6
United Airlines Logo
6:39 pm - 9:50 pmONT-HRL
25h 11m3 stops
United Airlines Logo
5:10 am - 12:14 pmHRL-ONT
9h 04m2 stops
$1,084United Airlines
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KAYAK's insights & trends for Ontario to Harlingen flights

Get data-powered insights and trends into flights from Ontario to Harlingen to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Ontario to Harlingen?

The average price of all round-trip flights from Ontario to Harlingen clicked on KAYAK for each day over the last 12 months.

If your flying dates are flexible, you should consider flying to Harlingen on a Sunday, as we generally find the cheapest rates on that day for this route. On the other hand, Monday is the most expensive day to fly from Ontario to Harlingen. For your return ticket, we recommend flying on a Sunday and avoiding Thursdays for the best deals.

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Good to know

Cheapest flight$160
Flight from Ontario to Harlingen

When to book flights from Ontario to Harlingen

Are your dates flexible? Find out the best times to travel from Ontario to Harlingen based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Ontario to Harlingen

  • What is the cheapest flight from Ontario to Harlingen?

    In the last 3 days, the lowest price for a flight from Ontario to Harlingen was $160 for a one-way ticket and $633 for a round-trip.

  • Do I need a passport to fly between Ontario and Harlingen?

    No

  • Which aircraft models fly most regularly from Ontario to Harlingen?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Ontario to Harlingen?

    oneworld, and Star Alliance are the airline alliances operating flights between Ontario and Harlingen, with oneworld being the most commonly used for this route.

  • How does KAYAK find such low prices on flights from Ontario to Harlingen?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Ontario to Harlingen.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Ontario to Harlingen?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Harlingen from Ontario is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Ontario to Harlingen?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Harlingen with an airline and back to Ontario with another airline. Booking your flights between Ontario and HRL can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Ontario to Harlingen?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Harlingen from Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Ontario to Harlingen

 
See real verified KAYAK customer reviews for airlines flying from Ontario to Harlingen. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Ontario to Harlingen? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.2
American AirlinesOverall score based on 10000 reviews
7.5Boarding
6.9Entertainment
6.5Food
7.2Comfort
8.0Crew
Airline reviews

The chair cushions may need an upgrade. I have been noticing they are so worn out, thin so you’d sit in a dip 😄. Other than that, all was an enjoyable trip. Thanks AA!

10.0 ExcellentFraxys, Jun 2025ONT - DFW
Read more American Airlines reviews

The chair cushions may need an upgrade. I have been noticing they are so worn out, thin so you’d sit in a dip 😄. Other than that, all was an enjoyable trip. Thanks AA!

I’m impressed that we were on time in Sacramento after having a late departure in Newark and our made it. The staff was friendly and warm.

5.5 hour delay with no explanation on why, along with no proactive effort to reaccomodate me.

Plane, flight, crew, captain were all great. The first flight had a Chipotle box lunch...delicious.

Plane, flight, crew, captain were all great. The first flight had a Chipotle box lunch...delicious. this return flight not as tasty, but filling.

So awful Unreliable Unfriendly Bad Mad Mean Smelly Hot Late Overbooked Understaffed Expensive Cramped Narcs If they were a fruit they’d be rotten durian

It’s a great flight. Service is good. Staff is awesome.

Boarding on time and fight was early but they didn't let us off the plane on time so we missed our connecting flight to Japan.

DFW-LHR Toilets not kept clean Too cramped. Aisles so narrow crew were constantly banging into people on the aisle seats. Even then, the carts used are reduced width. Other than that it was a decent flight on both legs

Eventless. It was a good flight and good crew. Can’t complaint.

Everything you need to know for your flight from Ontario to Harlingen

Information on your arrival and departure airports

Ontario (ONT)
Harlingen (HRL)

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