ONT

$78 Find Cheap Flights from Houston 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 Houston to Ontario departing on 9/4. 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 Houston 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 Houston to Ontario, as well as popular online travel agencies
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Flight Deals

Cheap Flights from Houston to Ontario

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

Thu, Sep 18 - Sun, Sep 21
Frontier Logo
5:07 pm - 6:35 pmIAH-ONT
3h 28mnonstop
Frontier Logo
12:28 pm - 5:47 pmONT-IAH
3h 19mnonstop
$118Frontier
Find Deal
Thu, Sep 11 - Thu, Sep 18
Frontier Logo
5:07 pm - 6:35 pmIAH-ONT
3h 28mnonstop
Frontier Logo
12:28 pm - 5:47 pmONT-IAH
3h 19mnonstop
$119Frontier
Find Deal
Fri, Sep 26 - Mon, Sep 29
Frontier Logo
5:07 pm - 6:35 pmIAH-ONT
3h 28mnonstop
Frontier Logo
8:59 pm - 9:14 pmONT-IAH
22h 15m1 stop
$122Frontier
Find Deal
Tue, Nov 11 - Sun, Nov 16
Frontier Logo
4:37 pm - 11:50 pmIAH-ONT
9h 13m1 stop
Frontier Logo
1:46 pm - 7:11 pmONT-IAH
3h 25mnonstop
$124Frontier
Find Deal
Wed, Oct 29 - Thu, Oct 30
American Airlines Logo
6:00 am - 10:07 amHOU-ONT
6h 07m1 stop
American Airlines Logo
10:57 am - 7:41 pmONT-HOU
6h 44m1 stop
$211American Airlines
Find Deal
Fri, Sep 26 - Mon, Sep 29
Southwest Logo
7:50 am - 9:05 amHOU-ONT
3h 15mnonstop
Southwest Logo
6:20 am - 11:30 amONT-HOU
3h 10mnonstop
$224Southwest
Find Deal
Mon, Sep 22 - Fri, Sep 26
Southwest Logo
7:50 am - 9:05 amHOU-ONT
3h 15mnonstop
Southwest Logo
6:20 am - 11:30 amONT-HOU
3h 10mnonstop
$236Southwest
Find Deal
Tue, Oct 21 - Fri, Oct 24
Delta Logo
2:22 pm - 10:22 pmHOU-ONT
10h 00m1 stop
Delta Logo
10:00 pm - 9:18 amONT-HOU
9h 18m1 stop
$237Delta
Find Deal
Tue, Oct 14 - Sat, Nov 1
American Airlines Logo
6:00 am - 10:07 amHOU-ONT
6h 07m1 stop
American Airlines Logo
12:47 pm - 10:14 pmONT-HOU
7h 27m1 stop
$256American Airlines
Find Deal
Wed, Oct 15 - Mon, Oct 20
Delta Logo
2:22 pm - 10:22 pmHOU-ONT
10h 00m1 stop
Delta Logo
10:00 pm - 9:18 amONT-HOU
9h 18m1 stop
$257Delta
Find Deal
Expert advice

Expert advice for your flight from Houston to Ontario

 
Snippets provided in this section are AI-generated based on a summarization of KAYAK-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Airlines
Frontier

Frontier's Premium Bundle includes priority boarding and extra legroom seats.


Avoid Basic Fare to prevent extra fees for carry-ons and seat selection.

Read more about Frontierby Stefanie Waldek
United Airlines

United's Economy Plus offers up to 6 inches more legroom than standard economy seats.


Purchase Priority Boarding to ensure overhead bin space for your carry-on.

Airports
IAH

IAH's free Wi-Fi and multiple lounges enhance comfort for travelers. United's Polaris Lounge offers premium amenities for eligible passengers.

Read more about IAHby John Walton
HOU

HOU offers a compact layout with easy navigation, making it ideal for quick departures. Expect short security lines and efficient baggage claim.

Read more about HOUby Yulia Denisyuk
ONT

ONT provides budget-friendly public transport options, including the Omnitrans Bus and Metrolink, for easy access to Southern California destinations.

Read more about ONTby Jennifer Simonson
Our travel experts
Stefanie Waldek

Stefanie Waldek

Expert on Frontier and United Airlines

Stefanie Waldek

Stefanie Waldek

Stefanie Waldek is a freelance space, travel, and design writer based in Saratoga Springs, NY. Her words have appeared in Space.com, Travel + Leisure, Condé Nast Traveler, Architectural Digest, and House Beautiful, among other publications. An expert in aviation and expedition cruising, Stefanie is frequently up in the air or on the sea, likely en route to Antarctica or the Arctic.

Read more
John Walton

John Walton

Expert on IAH

John Walton

John Walton

Independent aviation journalist John Walton took his first flight at eight weeks old and hasn’t stopped travelling since. A world-renowned expert in airlines and the passenger experience, he writes in depth on aviation, is a resident expert on travel in Japan and France, and offers a uniquely queer perspective on travelling the world.

Read more
Jennifer Simonson

Jennifer Simonson

Expert on ONT

Jennifer Simonson

Jennifer Simonson

Jennifer Simonson is driven by her lifelong commitment to exploring the globe. Her insatiable curiosity had led her to immerse herself into diverse locations like Oklahoma City and Pismo. Her hotel recommendations are the result of the myriad hotels she's stayed at across her travels. Along her journey, she cherishes engaging conversations with locals, indulging in the finest ice cream, trying her hand at surfing, and embarking on nature-filled hikes.

Read more
Yulia Denisyuk

Yulia Denisyuk

Expert on HOU

Yulia Denisyuk

Yulia Denisyuk

Yulia is a freelance journalist who’s dispatched from 90+ countries. Her work focuses on cultures, adventure trips and air travel, appearing in NatGeo, NYT, CNTraveler, and more. For past assignments, she’s stayed with nomads in Mongolia and learned the art of Imigongo in Rwanda. She’s based in Chicago; in winter she often questions that decision.

Read more
Booking Insights

KAYAK's insights & trends for Houston to Ontario flights

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

What is the cheapest Houston to Ontario flight route?

Data is based on round-trip flight searches on KAYAK over the past month.

The cheapest return flight from Houston to Ontario costs $82 on the route between Houston George Bush Intcntl Airport (IAH) and Ontario (ONT). Over the past month, this route was, on average, 46% cheaper than other Houston-Ontario routes. It is also the most popular route.

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

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

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

What is the cheapest month to fly from Houston to Ontario?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Houston to Ontario, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Houston to Ontario is February, where tickets cost $141 (return) on average. On the other hand, the most expensive months are June and December, where the average cost of round-trip tickets is $331 and $277 respectively.

How far in advance should I book a flight from Houston to Ontario?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Houston to Ontario, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Houston to Ontario, you should book around 2 weeks before departure, which saves you about 29% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 3 weeks before departure.

Good to know

Cheapest flight$78
Flight from Houston George Bush Airport to Ontario

When to book flights from Houston to Ontario

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

  • What is the cheapest flight from Houston to Ontario?

    In the last 3 days, the lowest price for a flight from Houston to Ontario was $78 for a one-way ticket and $118 for a round-trip.

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

    A passport is required to fly from Houston to Ontario.

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

    Houston is served by 2 major airports and there is only 1 main airport in Ontario. You will leave Houston from one of these airports: Houston Hobby or Houston George Bush Intcntl. You will be arriving at Ontario.

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

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

  • Which airline alliances offer flights from Houston to Ontario?

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

  • How does KAYAK find such low prices on flights from Houston 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 Houston to Ontario.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Ontario from Houston 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 Houston 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 Houston with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Houston 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 Houston up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Prefer to fly direct from Houston to Ontario?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from Houston to Ontario.
Find which airlines fly direct from Houston to Ontario Airport, which days they fly and book direct flights.

Direct departures

Houston to Ontario

Monday

Southwest, United Airlines, Frontier

Southwest, United Airlines, +1 more

Tuesday

Southwest, United Airlines

Southwest, United Airlines

Wednesday

Southwest, United Airlines

Southwest, United Airlines

Thursday

Frontier, Southwest, United Airlines

Frontier, Southwest, +1 more

Friday

Frontier, Southwest, United Airlines

Frontier, Southwest, +1 more

Saturday

Southwest, United Airlines

Southwest, United Airlines

Sunday

Frontier, Southwest, United Airlines

Frontier, Southwest, +1 more

See more direct flights

Direct returns

Ontario to Houston

Monday

Southwest, United Airlines, Frontier

Southwest, United Airlines, +1 more

Tuesday

Southwest, United Airlines

Southwest, United Airlines

Wednesday

Southwest, United Airlines

Southwest, United Airlines

Thursday

Frontier, Southwest, United Airlines

Frontier, Southwest, +1 more

Friday

Frontier, Southwest, United Airlines

Frontier, Southwest, +1 more

Saturday

Southwest, United Airlines

Southwest, United Airlines

Sunday

Frontier, Southwest, United Airlines

Frontier, Southwest, +1 more

See more direct flights

Reviews of the top 5 airlines serving from Houston to Ontario

 
See real verified KAYAK customer reviews for airlines flying from Houston 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 Houston 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 4242 reviews
7.5Entertainment
8.1Boarding
8.6Crew
7.0Food
8.0Comfort
Airline reviews

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

10.0 ExcellentGordon, Jul 2025GEG - OAK
Read more Southwest reviews

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.

Flight crew and cabin crew were great. I had to rearrange flights because my original flight was 3hrs delayed for weather, the rub is the flight I moved to boarded on time then we sat at the gate for 2 hours because scheduling stole our first officer for another flight, TWICE. Then our actual FO was an hour delayed. To make it worse my original flight went from a 3 hour delay to departing 15min EARLY. Just poor scheduling operations all around.

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.

Plane was crowded and even when we hit altitude, the plane was hot, not enough air flow.

Flight was delayed and missed my connection Lufthansa didn’t respond.

the delay for 3 hours was understandable due to weather conditions but the flight should’ve provided some on flight compensations or at least provide more food.

United could have one single once of customer service. No human United employee would help me with the invalid mileage plus number, they said I had to speak with the computer.

Overall it was good. I missed my connection but I was put on another flight.

Although the flight was delayed the crew and the flight itself were very good. Couldn't fault anything and after the disappointment of being abandoned in the US by BA it was a welcome relief to travel with United

Boarding experience was smooth. Flight attendants were friendly and helpful. Entertainment system on the Houston-Edmonton flight did not function for passengers on the left side of the aisle. On the bird's eye flight from Quito to Houston, they should not serve a meal. No one needs to eat after midnight and it is disturbing for those passengers trying to sleep.

Smooth flight. Boarding was chaotic. Could not hear the gate agent over the intercom. People were lined up in the wrong lines. Groups one and two were told to board through line one and group 3 through line 2. All very confusing. Once in the air, the flight was smooth. There was no entertainment option on this aircraft, even though it was a larger aircraft.

My suitcase was completed destroyed. The top part is broken and unusable now.

We boarded but then sat there waiting on some missed connection people to get on so we sat for about 15 minutes for that. Then we sat again because the passenger manifest was wrong and they had to figure it out before we could leave. That took about another 20 minutes or so. The crew was working hard to figure it out so it’s not their fault. It ended up being a system glitch where someone was upgraded to first class while another person was also in the same seat and it just created a mess that took a little while to figure out. They literally went to every person on the plane asking their names to see who was sitting in the wrong seat. I also hate the entertainment that must be watched on your phone or tablet. Just give us setback screens. It’s so much better. Almost every Delta flight has this now and it is so nice to have them. The crew did a great job. I have no complaints from them. They were very hard working, even with the mishap and a disgruntled passenger.

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.

Boarding was very efficient. Everyone got on board and we got on our way very quickly. It was frustrating that the entertainment app was not functioning properly. I was not able to activate some of the movies offered. The crew on this flight appears to be pretty grumpy. They had no smile on their faces. I felt like they were doing us a favor for being there.

Loved the staff, boarding and drink options! Wish the comfort of the seat could have been better nevertheless

Honestly, I haven’t flown American in years, probably due to the pandemic and my being unable to travel for certain periods in the last two years, but it was a good experience to dig out or obtain a new American Airlines account after many years of traveling for business with American in the past.

Spirit is low fare air line. Food also cost you. No free food.

Everyone was kind for the most part. I did travel with children and paid for seats and even then it was not as suitable. I tried calling their customer service prior to check in and I was told they couldn't help me because I didn't purchase my tickets with them.

I think the staff was nice. They took time to explain safety protocols. Boarding was great. They started early and our flight left a little early which was convenient. Having free games to play would have been better

Late departure by 1:45min. No explanation why. During boarding inconsistent policing of their baggage rules. Before takeoff and lamdimg strange obsession with window shade and armrest positions. Don't know why they care. 15 min tarmac delay on arrival, they blamed airport congestion but we were the o lh flight waiting, it was clear it was due to poor staff planning (only one ground crew to receive airplanes and multiple arrivals) Got there but was rrally lame the whole trip.

Better than my las vagas experience, but still dissapointed with the airline support service.

Boarding was a breeze, however, two of the flights that I boarded with Spirit did not have Wi-Fi available.

Very good. Nothing more or less than expected. No complaints.

My experience with the spirit as a first time it was OK, but the seats need a little cushion, the problem I had the most impacted me was when checking in the scales were so off and wrong. It will tell that you would have more weight, which was not true. The scale was say that it had Thirty Eight Pounds, when get in the labels when we send the luggage into the band. It says that it was overweight. I really really dislike that because the scales are not accurate. If I use Spirit and I have that issue again. That will be my last time flying with the spirit, even though I like so much to service the planes, and everything else

hahaha we are delayed for one hour plus.. but thx we arrived San Diego safe

Worst airline ever! The guy weighing my bag had his foot on the metal plate and when I called him out on it, I got this stupid little smirk. La is a scam and so is Spirit Airlines. All the flight attendants looked like they hated our flight just as much as we did.

Great for the price. No wifi or entertainment, but gate agents and crew were fantastic and we boarded quickly and left on time.

Decent clean onboard experience. Okay discount airline experience. Unfortunately, any customer service interactions are difficult and unhelpful. There is no service. Also, a premium seat only gets you premium boarding if you line up first. Once they start general boarding you must go to the back of the line. Not very premium

The crew was mostly okay. The flight attendant who answered our questions was curt and unhelpful unfortunately. He seemed upset and I understand having off days.

We were delayed three times ,and that destroyed my plans, and reservations

Very bad! No good service delayed my second connection flight

They canceled flight. Hard to believe there was even a plane incoming for us to get on

Book with frontier airlines with the mentality that they'll cancel your flight, kick you off and lose your luggage. Anything besides that is a win. Compare prices with other airlines (to include luggage) and if frontier is still worth it, book it but know all of their policies.

Plane was down graded and I lost my uncharged exit row with more leg room. No mention or offer of refund from podium. Flight attendant was nice to explain this happens often and that I could request a refund via online form submission. I did this and have heard nothing back.

Horrendous. I do not recommend Frontier. The passengers lack manners and decency, and the flight attendants lack professionalism. If I wasn’t in a bind to fly with 48 hours notice for a job interview, I would not have selected a flight with Frontier and I never plan to fly with them in the future.

The reps working at the airport counter were dumber than a second coat of paint.

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

Information on your arrival and departure airports

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