ONT - HRL

$154 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 5/17. 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, 0 bags

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
Travelers love KAYAK
41 299 237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$257
United Airlines
Tue 4/28Sat 5/2
ONT - HRL • 1 stop
Cheapest one-way
$154
American Airlines
Sun 5/17
ONT - HRL • 1 stop
Top airlines
United Airlines
Cheapest • from $257 (round-trip)
Southwest
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Ontario and Harlingen. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Houston (HOU)
Cheapest • Avg $263 (round-trip)
Dallas (DFW)
Shortest trip • 7h 18m (one-way)
Insights
Insights
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Harlingen!
Flight Deals
Booking Insights
Flight 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, Apr 28 - Sat, May 2
United Airlines Logo
6:05 am - 4:04 pm
ONT
-
HRL
7h 59m
1 stop
United Airlines Logo
5:18 pm - 9:58 pm
HRL
-
ONT
6h 40m
1 stop
$257United Airlines
Tue, Apr 28 - Tue, May 5
United Airlines Logo
6:05 am - 4:04 pm
ONT
-
HRL
7h 59m
1 stop
United Airlines Logo
7:00 am - 5:52 pm
HRL
-
ONT
12h 52m
2 stops
$262United Airlines
Tue, Apr 28 - Wed, Apr 29
United Airlines Logo
6:05 am - 4:04 pm
ONT
-
HRL
7h 59m
1 stop
United Airlines Logo
7:00 am - 5:47 pm
HRL
-
ONT
12h 47m
2 stops
$302United Airlines
Tue, Apr 28 - Tue, May 5
United Airlines Logo
5:10 am - 7:40 pm
ONT
-
HRL
12h 30m
2 stops
United Airlines Logo
7:00 am - 5:52 pm
HRL
-
ONT
12h 52m
2 stops
$339United Airlines
Mon, Jun 1 - Fri, Jun 5
Southwest Logo
12:40 pm - 11:00 pm
ONT
-
HRL
8h 20m
2 stops
Southwest Logo
5:40 pm - 9:05 pm
HRL
-
ONT
5h 25m
1 stop
$379Southwest
Thu, May 14 - Sat, May 16
American Airlines Logo
11:59 pm - 10:17 am
ONT
-
HRL
8h 18m
1 stop
American Airlines Logo
10:47 am - 7:34 pm
HRL
-
ONT
10h 47m
2 stops
$380American Airlines
Mon, Jun 1 - Fri, Jun 5
Southwest Logo
12:40 pm - 11:00 pm
ONT
-
HRL
8h 20m
2 stops
Southwest Logo
5:40 pm - 12:05 am
HRL
-
ONT
8h 25m
2 stops
$384Southwest
Tue, Apr 28 - Wed, Apr 29
United Airlines Logo
5:10 am - 7:40 pm
ONT
-
HRL
12h 30m
2 stops
United Airlines Logo
7:00 am - 5:47 pm
HRL
-
ONT
12h 47m
2 stops
$388United Airlines
Thu, May 14 - Sat, May 16
Southwest Logo
1:50 pm - 11:00 pm
ONT
-
HRL
7h 10m
1 stop
Southwest Logo
6:05 am - 9:35 am
HRL
-
ONT
5h 30m
1 stop
$394Southwest
Tue, Apr 28 - Wed, Apr 29
United Airlines Logo
5:10 am - 7:40 pm
ONT
-
HRL
12h 30m
2 stops
United Airlines Logo
12:05 pm - 10:45 pm
HRL
-
ONT
12h 40m
2 stops
$398United Airlines
Booking Insights

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.

Which airlines provide the cheapest flights from Ontario to Harlingen?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest round-trip tickets from Ontario to Harlingen were found on United Airlines ($257) and Southwest ($379).

Find deals

Good to know

Low seasonAugust
Cheapest flight$154
Best time to beat the crowds with an average 38% drop in price.
Most popular time to fly with an average 22% increase in price.
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 $154 for a one-way ticket and $257 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 is the only airline alliance operating flights between Ontario and Harlingen.

  • Which is the best airline for flights from Ontario to Harlingen, Southwest or American Airlines?

    The two airlines most popular with KAYAK users for flights from Ontario to Harlingen are Southwest and American Airlines. With an average price for the route of $263 and an overall rating of 8.0, Southwest is the most popular choice. American Airlines is also a great choice for the route, with an average price of $487 and an overall rating of 7.1.

  • 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 airlines 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.
8.0
SouthwestOverall score based on 4334 reviews
7.5Entertainment
8.6Crew
7.0Food
8.0Comfort
8.1Boarding
Airline reviews

I elected to pay for the upgrades and found very little difference

6.0 GoodChris, Mar 2026
DAL - SAT
Read more Southwest reviews

I elected to pay for the upgrades and found very little difference

The new seating arrangement is so over priced for what you get.

Snacks are always pretzels. Why can't you also offer peanuts ?

Flight was hours late, unable to sit next to spouse, I have had so much better experiences. Substantially better, only saving grace was that it was a short flight.

An entire day of delays. Cost lots of money. Meals and a hotel.

Only downside was the legroom and seat width, which is always a problem unless I spend more for a premium seat.

Great flight but super high price. Glad it was a business trip and not personal

On time. Friendly staff. Took to long to pre bord all the specialty groups. Cramped small plane

No delays and arrived to destination 30 min early. Staff was super friendly.

Everything a cheap airline should be at normal airline rates.

Better snacks but flight and crew were amazing on this flight

It was the most un-special flight experience in my life.

The flight attendant in business class was excellent! Professional, friendly and attentive.

Terrible planning. And even worse gate agents. Absolutely rude behavior.

Rough flight No beverage service due to turbulence Bottom Seat cushion was non existent

They put me on an earlier and I got home sooner

Not good. One of my luggage is missing. And until now they can’t find it

Delay after delay with little communication then AA lost my luggage and at airport would not assist just said scan this QR code to track your luggage and submit a claim. However QR code provided did not work so have to go back to airport

Where do I start!! I was delayed with my flight from Dallas to Tampa. On the way back from Tampa to Dallas the flight was delayed over 4 hours+. I was put on another flight that was also delayed but not as long. Traveling on American Airlines is becoming exhausing.

Dloght delayed by 2.5 hrs . Common theme in my last four american floghts

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

Information on your arrival and departure airports

Ontario (ONT)
Harlingen (HRL)