ONT

$55 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 3/2. 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 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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41,299,237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$101
Overall average: $130
Frontier
Mon 2/9Tue 2/10
IAH - ONT • Non-stop
Cheapest non-stop
$111
Typical prices: $82-$290
Frontier
Mon 2/2Mon 2/9
IAH - ONT • Non-stop
Our travelers' advice
AI-powered summary based on content written by travel experts. AI can make mistakes.
United's Economy Plus offers more legroom than standard.
ONT has budget-friendly public transport options.
Expert advice
Expert advice
Expert advice
Expert advice
Top airlines
Frontier
Cheapest • from $245 (round-trip)
Southwest
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Top routes
IAH-ONT
Cheapest • 54% average savings
IAH-ONT
Most popular
Insights
Insights
Insights
Insights
When to book
2 weeks
in advance
Our data shows that travelers who book at least 2 weeks in advance save around 20% compared to booking last minute.
Insights
Insights
Insights
Insights
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 Ontario!
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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

Mon, Feb 9 - Tue, Feb 10
Frontier Logo
10:51 am - 12:43 pm
IAH
-
ONT
3h 52mnonstop
Frontier Logo
8:36 am - 11:32 pm
ONT
-
IAH
12h 56m1 stop
$101Frontier
Mon, Feb 2 - Mon, Feb 9
Frontier Logo
10:51 am - 12:43 pm
IAH
-
ONT
3h 52mnonstop
Frontier Logo
1:46 pm - 7:07 pm
ONT
-
IAH
3h 21mnonstop
$111Frontier
Mon, Mar 16 - Mon, Mar 23
Frontier Logo
1:00 pm - 2:45 pm
IAH
-
ONT
3h 45mnonstop
Frontier Logo
4:22 pm - 9:42 pm
ONT
-
IAH
3h 20mnonstop
$112Frontier
Mon, Mar 9 - Mon, Mar 16
Frontier Logo
7:19 pm - 9:04 pm
IAH
-
ONT
3h 45mnonstop
Frontier Logo
4:22 pm - 9:42 pm
ONT
-
IAH
3h 20mnonstop
$113Frontier
Wed, Feb 4 - Tue, Feb 10
Delta Logo
5:45 am - 11:31 am
HOU
-
ONT
7h 46m1 stop
Delta Logo
12:41 pm - 10:33 pm
ONT
-
HOU
7h 52m1 stop
$261Delta
Tue, Feb 17 - Tue, Feb 24
Delta Logo
1:06 pm - 11:49 pm
HOU
-
ONT
12h 43m2 stops
Delta Logo
10:20 pm - 10:01 am
ONT
-
HOU
9h 41m1 stop
$266Delta
Tue, Feb 17 - Tue, Feb 24
Delta Logo
1:06 pm - 11:49 pm
HOU
-
ONT
12h 43m2 stops
Delta Logo
5:00 pm - 10:01 am
ONT
-
HOU
15h 01m2 stops
$272Delta
Tue, Feb 17 - Tue, Feb 24
Southwest Logo
8:00 am - 9:35 am
HOU
-
ONT
3h 35mnonstop
Southwest Logo
5:15 am - 10:15 am
ONT
-
HOU
3h 00mnonstop
$295Southwest
Wed, Jan 28 - Wed, Feb 4
Southwest Logo
3:35 pm - 5:10 pm
HOU
-
ONT
3h 35mnonstop
Southwest Logo
5:15 am - 10:15 am
ONT
-
HOU
3h 00mnonstop
$303Southwest
Tue, Feb 17 - Tue, Feb 24
Southwest Logo
8:00 am - 9:35 am
HOU
-
ONT
3h 35mnonstop
Southwest Logo
6:30 am - 3:25 pm
ONT
-
HOU
6h 55m1 stop
$305Southwest
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 $97 on the route between Houston George Bush Intcntl Airport (IAH) and Ontario (ONT). Over the past month, this route was, on average, 54% 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 Friday 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 $152 (return) on average. On the other hand, the most expensive months are December and June, where the average cost of round-trip tickets is $394 and $326 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 20% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 3 weeks before departure.

Expert advice

Expert advice for your flight from Houston to Ontario

 
AI-powered summary based on content written by travel experts. AI can make mistakes.
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.

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.

HOU

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

ONT

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

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

Good to know

Cheapest flight$55
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 $55 for a one-way ticket and $101 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 Star Alliance 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

Frontier, Southwest, United Airlines

Frontier, Southwest, +1 more

Tuesday

Southwest, United Airlines

Southwest, United Airlines

Wednesday

Southwest, United Airlines

Southwest, United Airlines

Thursday

Southwest, United Airlines

Southwest, United Airlines

Friday

Frontier, Southwest, United Airlines

Frontier, Southwest, +1 more

Saturday

Southwest, United Airlines

Southwest, United Airlines

Sunday

Southwest, United Airlines

Southwest, United Airlines

See more direct flights

Direct returns

Ontario to Houston

Monday

Frontier, Southwest, United Airlines

Frontier, Southwest, +1 more

Tuesday

Southwest, United Airlines

Southwest, United Airlines

Wednesday

Southwest, United Airlines

Southwest, United Airlines

Thursday

Southwest, United Airlines

Southwest, United Airlines

Friday

Frontier, Southwest, United Airlines

Frontier, Southwest, +1 more

Saturday

Southwest, United Airlines

Southwest, United Airlines

Sunday

Southwest, United Airlines

Southwest, United Airlines

See more direct flights

Reviews of the top 4 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 4249 reviews
8.0Comfort
8.6Crew
7.0Food
7.5Entertainment
8.1Boarding
Airline reviews

The flight crew was extremely rude and especially not helpful when our flight was delayed.

2.0 MediocreMatthew, Jan 2026
DAL - SAN
Read more Southwest reviews

The flight crew was extremely rude and especially not helpful when our flight was delayed.

The boarding and seat assignment system no longer works for me, but I know it is being replaced. Otherwise, I am good with the overall experience.

The lead steward kept singing about "San Francisco" and hotel California---more annoying than humorous....needs work. Flight was smooth and on time.

Still a fan of open seating. Flight was on schedule and arrived on time. The 737 MAX is very comfortable.

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

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.

Delays delays delays. Late taking off, late landing, wait for a gate, etc.

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.

Unbelievably poor service from flight attendants. They didn’t even do water service on a four hour flight. Just disrespectful.

Seats had less pitch than a regional jet. Food was OK. Have to buy alcohol on US based carriers flying international. Boarding was a mess. Did not have bags but overhead space was gone quick. Would like to see the airlines enforce the one bag over and one bag under policy

Lately I like the planes have been exceptionally filthy. There’s lines of dust and dirt all across the ceiling in the vents, and the cracks in between the seats are literally full of food. It’s definitely not the quality of service that I was used to with United. I’m also very disappointed with the Wi-Fi! All I wanna do is knock out a few work jobs while I’m trapped in my seat And it spools so bad. They did provide me with a refund, but the process of getting that refund is so complicated. It’s unfortunate.

Crew was excellent. This was a relatively long flight though and had very little leg room, and no entertainment.

The newer screen was super cool and had the option to watch many different shows or movies. Crew was polite and helpful. However again, many children screaming bloody murder and kicking my seat, and parents doing nothing about it as usual.

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.

Everything about the flight was lovely. My only suggestion would be to offer a few more options of tv series from Apple TV or HBO.

After the door had been closed, the cockpit makes an announcement that catering is running late and it is not the airline's fault. It is their fault in the sense that we had to sit for 2 hours or more when we could have stayed in the terminal. Poor communications between catering and airline. This caused a young man to lose his temper and he went storming out hitting objects. He had complained to the gate agent that he had already waited at the gate 7 hours and when can the airplane leave? Airilnes do a poor job of explaining delays, maintenance issues, etc. whereas being truthful may gain more sympathy or understanding.

We were told the flight was delayed 5 times, then it was moved to the next day.

The experience with American Airlines was good, although the Philippines Airlines flight was much better (better seats, better food, better entertainment options, overall better). Again, the MIA to LAX flight was fine, but nothing in comparison to the comfort and accommodations of the Philippines Airlines flight from LAX to MNL.

Loved the crew . Absolutely no complaints. Except for luggage lost

Wish some foods provided rather than just biscuit/cookie for flight more than 2 hours

We are too tired and frustrated to comment politely at this point

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!

There's nothing I liked about it. For first off I scheduled this trip two weeks in advance then they delayed my flight which messed up my whole trip. So I scheduled it for the following weekend thinking there won't be a delay and guess what as soon as I got to the airport we said in the airplane on the tarmac for an hour and a half. Not only was it delayed I missed my connecting flight meaning I had to stay the night at Dallas-Fort Worth airport sleeping on the floor. I will tell you this I will never fly American airlines ever again I have had nothing but horrible experience with them and I just throw money at them

Terrible. The canceled my entire flight when I requested a refund for a trip frontier canceled trip one way.

i was unable to check in the flight. refund requested

I think Frontier was very good at communication. Their app worked very well. Loading was great and the flight was nice and easy.

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.

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

Information on your arrival and departure airports