ONT - HRL

$166 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 12/2. 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

Save 24% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Everything you should know

Cheapest round-trip
$256
United Airlines
Sat 12/13Tue 12/16
ONT - HRL • 1 stop
Cheapest one-way
$166
American Airlines
Tue 12/2
ONT - HRL • 1 stop
Top airlines
United Airlines
Cheapest • from $256 (round-trip)
Southwest
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Start a new search
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

Sat, Dec 13 - Tue, Dec 16
United Airlines Logo
6:00 am - 3:59 pmONT-HRL
7h 59m1 stop
United Airlines Logo
9:20 am - 5:37 pmHRL-ONT
10h 17m2 stops
$256United Airlines
Find Deal
Sat, Dec 13 - Tue, Dec 16
American Airlines Logo
3:04 pm - 11:11 pmONT-HRL
6h 07m1 stop
American Airlines Logo
5:36 am - 9:54 amHRL-ONT
6h 18m1 stop
$291American Airlines
Find Deal
Sat, Dec 13 - Tue, Dec 16
American Airlines Logo
12:55 pm - 11:11 pmONT-HRL
8h 16m2 stops
American Airlines Logo
5:36 am - 4:02 pmHRL-ONT
12h 26m2 stops
$301American Airlines
Find Deal
Thu, Jan 15 - Mon, Jan 19
American Airlines Logo
3:09 pm - 11:21 pmONT-HRL
6h 12m1 stop
American Airlines Logo
6:02 am - 10:08 amHRL-ONT
6h 06m1 stop
$327American Airlines
Find Deal
Wed, Dec 3 - Wed, Dec 10
United Airlines Logo
6:00 am - 3:59 pmONT-HRL
7h 59m1 stop
United Airlines Logo
5:00 pm - 9:49 pmHRL-ONT
6h 49m1 stop
$331United Airlines
Find Deal
Sat, Jan 17 - Sat, Jan 24
United Airlines Logo
6:10 am - 4:06 pmONT-HRL
7h 56m1 stop
United Airlines Logo
12:10 pm - 10:53 pmHRL-ONT
12h 43m2 stops
$332United Airlines
Find Deal
Tue, Dec 2 - Tue, Dec 9
United Airlines Logo
6:41 pm - 11:04 amONT-HRL
14h 23m2 stops
United Airlines Logo
5:00 pm - 9:49 pmHRL-ONT
6h 49m1 stop
$336United Airlines
Find Deal
Sat, Jan 17 - Sat, Jan 24
United Airlines Logo
5:05 am - 4:06 pmONT-HRL
9h 01m2 stops
United Airlines Logo
12:10 pm - 10:53 pmHRL-ONT
12h 43m2 stops
$337United Airlines
Find Deal
Tue, Dec 2 - Tue, Dec 9
United Airlines Logo
6:41 pm - 11:04 amONT-HRL
14h 23m2 stops
United Airlines Logo
9:20 am - 8:42 pmHRL-ONT
13h 22m2 stops
$341United Airlines
Find Deal
Tue, Dec 2 - Wed, Dec 10
American Airlines Logo
3:19 pm - 11:10 pmONT-HRL
5h 51m1 stop
American Airlines Logo
5:36 am - 9:54 amHRL-ONT
6h 18m1 stop
$371American Airlines
Find Deal
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.

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.

Find deals

Good to know

Cheapest flight$166
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 $166 for a one-way ticket and $256 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 $378 and an overall rating of 7.2.

  • 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 4244 reviews
8.0Comfort
7.0Food
7.5Entertainment
8.1Boarding
8.6Crew
Airline reviews

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

10.0 ExcellentIlevba, Nov 2025DCA - DAL
Read more Southwest reviews

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

San Diego airport is brand new, spacious, airy and very smooth checkin at SW baggage drop.

Crew could have been friendlier, maybe I'm spoiled by SW crews. In flight wifi was good. Would be nice to have more food offerings on a 4 plus hour flight

Everything a cheap airline should be at normal airline rates.

Ever since Southwest starting charging for bags, passengers don't want to pay to check their bags, so the gate agents have to beg people to check their roller bags now because there's "not enough space". This was a terrible business move by Southwest.

Full cans of soda would be nice. A choice between two snacks would be appreciated.

Tried watching free movie and it kept freezing so I couldn’t finish.

Sacrament staff are always polite and helpful. Airport is easy to maneuver and boarding is straightforward.

I was re-booked onto another flight because my original flight was delayed and I would have missed my connector. I ended up in the “C” group after paying extra to be in the “A “ group on the original flight. At least if you’re going to re-book people, re-book them into the same group.

As always, the entire Southwest experience was wonderful, from online booking to flight to baggage retrieval. Very grateful.

I have a gluten allergy so didn't have any food

Baggage handling poor. Second time this has happened. My bag went to San Francisco instead of Fiji. No apology. Luckily Nadi airport staff are fantastic. My bag arrived in Fiji the next day.

Wish a flight with more than 2 hours with some snack rather than just cookie/biscuit.

Flight delayed and missed connection. Rescheduled flight cancelled after 6 hrs wait. Rerouted thru ORD, flight cancelled, overnight stay in ORD. Still in the air on new flight!

Delayed delayed delayed and no offer for food or vouchers

A couple ladies from the crew were so rude and nasty. Thought they were mad at having to be there especially if you asked a question. This will make me think twice next time if I book a flight with you.

Always seated jammed in rear of aircraft Admirals Club food at DFW terminal D was absolute worst food experience and I pay $600/year to eat this dried out junk

Flight attendants on this flight were very attentive and friendly

You can plug your phone in & use their wifi to watch movies, etc, but the plane’s wifi was disconnected for most of the flight.

Very below average , plane from Dallas to Toyko was very poor designed plane. I had to sit for 13 hours next to fat man. Really bad seat and entertainment screen sucked

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

Information on your arrival and departure airports

Ontario (ONT)
Harlingen (HRL)