HRL - ONT

$260 Find Cheap Flights from Harlingen to Ontario

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Harlingen to Ontario departing on 10/17. 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

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

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

Cheap Flights from Harlingen to Ontario (HRL-ONT)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Harlingen to Ontario 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 Harlingen to Ontario

Fri, Oct 31 - Wed, Nov 5
American Airlines Logo
10:06 am - 6:35 pmHRL-ONT
10h 29m2 stops
American Airlines Logo
7:00 am - 3:32 pmONT-HRL
6h 32m1 stop
$274American Airlines
Find Deal
Fri, Oct 31 - Wed, Nov 5
American Airlines Logo
10:06 am - 6:35 pmHRL-ONT
10h 29m2 stops
American Airlines Logo
12:55 pm - 11:14 pmONT-HRL
8h 19m2 stops
$279American Airlines
Find Deal
Fri, Oct 31 - Wed, Nov 5
American Airlines Logo
10:06 am - 2:01 pmHRL-ONT
5h 55m1 stop
American Airlines Logo
7:00 am - 3:32 pmONT-HRL
6h 32m1 stop
$304American Airlines
Find Deal
Tue, Mar 3 - Wed, Mar 4
American Airlines Logo
8:00 pm - 11:43 pmHRL-ONT
5h 43m1 stop
American Airlines Logo
3:05 pm - 12:01 amONT-HRL
6h 56m1 stop
$331American Airlines
Find Deal
Tue, Mar 3 - Wed, Mar 4
American Airlines Logo
8:00 pm - 11:43 pmHRL-ONT
5h 43m1 stop
American Airlines Logo
1:30 pm - 12:01 amONT-HRL
8h 31m2 stops
$336American Airlines
Find Deal
Tue, Mar 3 - Wed, Mar 4
American Airlines Logo
8:00 pm - 11:43 pmHRL-ONT
5h 43m1 stop
American Airlines Logo
6:47 am - 4:13 pmONT-HRL
7h 26m1 stop
$349American Airlines
Find Deal
Tue, Mar 3 - Wed, Mar 4
American Airlines Logo
8:00 pm - 11:43 pmHRL-ONT
5h 43m1 stop
American Airlines Logo
1:30 pm - 12:01 amONT-HRL
8h 31m2 stops
$354American Airlines
Find Deal
Tue, Mar 3 - Wed, Mar 4
United Airlines Logo
12:10 pm - 10:57 pmHRL-ONT
12h 47m2 stops
United Airlines Logo
6:37 pm - 10:59 amONT-HRL
14h 22m2 stops
$403United Airlines
Find Deal
Tue, Nov 4 - Sat, Nov 8
United Airlines Logo
5:00 pm - 9:49 pmHRL-ONT
6h 49m1 stop
United Airlines Logo
6:05 am - 3:59 pmONT-HRL
7h 54m1 stop
$438United Airlines
Find Deal
Tue, Mar 3 - Wed, Mar 4
American Airlines Logo
10:05 am - 5:55 pmHRL-ONT
9h 50m2 stops
American Airlines Logo
1:30 pm - 12:01 amONT-HRL
8h 31m2 stops
$444American Airlines
Find Deal

Everything you should know

Top airlines
American Airlines
Cheapest • from $274 (round-trip)
Southwest
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Cheapest round-trip
$274
American Airlines
Fri 10/31Wed 11/5
HRL - ONT • 2 stops
Cheapest one-way
$260
United Airlines
Fri 10/17
HRL - ONT • 1 stop
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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 Ontario!
Booking Insights

KAYAK's insights & trends for Harlingen to Ontario flights

Get data-powered insights and trends into flights from Harlingen to Ontario 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 Harlingen to Ontario?

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

When flying from Harlingen to Ontario, you should consider leaving on a Sunday and avoid Thursdays if you are looking for the best rates. For your return to Harlingen, you’ll find the best rates on Sundays and the most expensive ones on Mondays.

Good to know

Low seasonApril
Cheapest flight$260
Best time to beat the crowds with an average 26% drop in price.
Most popular time to fly and prices are also 7% lower on average.
Flight from Harlingen to Ontario

When to book flights from Harlingen to Ontario

Are your dates flexible? Find out the best times to travel from Harlingen to Ontario 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 Harlingen to Ontario

  • What is the cheapest flight from Harlingen to Ontario?

    In the last 3 days, the lowest price for a flight from Harlingen to Ontario was $260 for a one-way ticket and $274 for a round-trip.

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

    Even though you are not required to have a passport, keep in mind that an official ID is needed to board the airplane.

  • Which airports will I be using when flying from Harlingen to Ontario?

    Harlingen airport is called Harlingen Valley Intl and the only airport in Ontario is Ontario.

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

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

  • Which airline alliances offer flights from Harlingen to Ontario?

    oneworld is the only airline alliance operating flights between Harlingen and Ontario.

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

    The two airlines most popular with KAYAK users for flights from Harlingen to Ontario are Southwest and American Airlines. With an average price for the route of $294 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 $418 and an overall rating of 7.2.

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

    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 Harlingen to Ontario.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Ontario from Harlingen 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 Harlingen to Ontario?

    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 Ontario with an airline and back to Harlingen with another airline. Booking your flights between Harlingen and ONT 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 Harlingen to Ontario?

    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 Ontario from Harlingen 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 Harlingen to Ontario

 
See real verified KAYAK customer reviews for airlines flying from Harlingen to Ontario. 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 Harlingen to Ontario? 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 4248 reviews
8.6Crew
7.0Food
8.1Boarding
8.0Comfort
7.5Entertainment
Airline reviews

Connecting flight is on time and boarding was a breeze!

10.0 ExcellentGabriel, Sep 2025DEN - SMF
Read more Southwest reviews

Connecting flight is on time and boarding was a breeze!

Very smooth checking in our luggage with a super pleasant SW agent. I enjoyed a fun entertaining movie.

First time traveling on Southwest since bag fees were implemented. Usual good service. Just more expensive now.

It was a perfect flight in all aspects! Both legs!

Boarding process, crew were good. But the seats were so uncomfortable that was all I could focus on. I literally had to sit forward so that all 3 of us could fit in row. I will try to avoid Southwest in the future for any flights over 60 minutes.

Great flight, 47 passengers on a 180 seat plane. Stewardess was pleasant and cheerful.

Great experience flying Southwest. The crew was really kind and helpful, and very friendly with our toddler.

Plane late from DC to Austin 30 minutes. Crew made up much of the time enroute to San Diego.

Fine, but how to board on SW versus othrr airlines, is just lame. Goood staff though and all was solid otherwise.

Was as expected. Crowed planes. Too many carryons delaying takeoff. But the ride only took an hour and saved me a lot of time SFO is a not a great airport.

The flight crew was rude. We were in first class and no one even offered water until an hour after we were in the air. Horrible experience

Great. Quick and quiet and east. The breakfast choices were a welcome surprise!

The stewardess hit me with the food kart twice on the head and didn't say I'm sorry once. The same stewardess gave me a warm Apple Juice with No ice. The Flight was delayed for Departure 6 times, starting from 2:36pm, finally taking off 7:50pm. I was late picking up my child from the sitter by 3 hours.

Did not get the seat I selected and paid for.

My flight was delayed for several hours. Sitting at gate 16 for several hours, I got a text from Kayak the gate changed to 9 before it was announced. Very bad communication at each gate from American Airlines employees. I received 10 notifications of delay from Kayak. My vacation started off horrible! I will write to American Airlines corporate office also.

Delayed flight that lead to a missed connection and a 5-hour trip became a 12-hour flight 🙄

There is no room, no gluten free options, or any free internet/entertainment. You have to bring your own tablet or smartphone because there are no screens.

Amazing food, great staff, with one noticable detail missing ...but no seat entertainment in any of aircraft ...I am not a fan

Boarding gate in Honolulu was staffed with a great clerk with a soothing voice despite the flight delay of over an hour. Flight attendants in the plane were all grumpy, not pleasant looking bunch. Their sour attitude showed throughout the flight. Inly able to get a select few movies started. Most of the movie links in the “free entertainment” did not work.

This was a horrible experience. For a first class experience, my chair was held together by 3M tape - and I have a photo. The crew weren’t very attentive, somewhat dismissive and forgot my drink and snack, the chair reclined about 3 inches on a 6-hour cross country flight. I was also not informed that there was no lounge available in Newark airport because of renovations, so all around this was one of the worst experiences and I would actively avoid both American and Alaska Air going forward.

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

Information on your arrival and departure airports

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