ONT

$98 Find Cheap Flights from Houston to Ontario

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Houston to Ontario departing on 5/11. 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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Everything you should know

Cheapest round-trip
$98
Typical prices: $276-$159
Frontier
Mon 5/11Mon 5/11
IAH - ONT • Non-stop
Cheapest one-way
$105
Typical prices: $113-$214
Frontier
Sat 5/30
IAH - ONT • 1 stop
Advice from real travelers
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
Cheapest • from $98 (round-trip)
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
You can fly direct with Frontier, Southwest and United Airlines. Average duration is 3h 34m
Direct flights
Direct flights
+1
+1
Direct flights
Direct flights
+1
Top routes
Cheapest • 40% average savings
Most popular
Insights
Insights
Insights
Insights
When to book
in advance
Our data shows that travelers who book at least 2 weeks in advance save around 20% compared to booking last minute.
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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, May 11 - Mon, May 11
Frontier Logo
6:00 am - 7:35 am
IAH
-
ONT
3h 35mnonstop
Frontier Logo
8:06 pm - 1:25 am
ONT
-
IAH
3h 19mnonstop
$98Frontier
Mon, May 4 - Sat, May 9
Frontier Logo
3:01 pm - 4:38 pm
IAH
-
ONT
3h 37mnonstop
Frontier Logo
5:59 pm - 11:19 pm
ONT
-
IAH
3h 20mnonstop
$102Frontier
Mon, May 11 - Sun, May 17
Frontier Logo
6:00 am - 7:35 am
IAH
-
ONT
3h 35mnonstop
Frontier Logo
8:06 pm - 1:25 am
ONT
-
IAH
3h 19mnonstop
$103Frontier
Fri, May 1 - Sun, May 3
Frontier Logo
3:01 pm - 4:38 pm
IAH
-
ONT
3h 37mnonstop
Frontier Logo
8:21 am - 1:41 pm
ONT
-
IAH
3h 20mnonstop
$107Frontier
Tue, Apr 28 - Tue, May 5
Delta Logo
6:00 am - 11:36 am
HOU
-
ONT
7h 36m
1 stop
Delta Logo
10:15 pm - 9:58 am
ONT
-
HOU
9h 43m
1 stop
$257Delta
Tue, Apr 28 - Tue, May 5
Delta Logo
6:00 am - 11:36 am
HOU
-
ONT
7h 36m
1 stop
Delta Logo
5:05 pm - 9:58 am
ONT
-
HOU
14h 53m
2 stops
$262Delta
Tue, Apr 28 - Wed, May 6
Southwest Logo
9:00 pm - 10:25 pm
HOU
-
ONT
3h 25mnonstop
Southwest Logo
2:25 pm - 10:20 pm
ONT
-
HOU
5h 55m
1 stop
$264Southwest
Sat, May 2 - Mon, May 4
Southwest Logo
6:15 am - 9:50 am
HOU
-
ONT
5h 35m
1 stop
Southwest Logo
1:50 pm - 6:50 pm
ONT
-
HOU
3h 00mnonstop
$267Southwest
Tue, Apr 28 - Wed, May 6
Southwest Logo
9:00 pm - 10:25 pm
HOU
-
ONT
3h 25mnonstop
Southwest Logo
11:55 pm - 12:15 pm
ONT
-
HOU
10h 20m
2 stops
$269Southwest
Fri, May 1 - Wed, May 6
Delta Logo
1:31 pm - 9:00 pm
HOU
-
ONT
9h 29m
1 stop
Delta Logo
5:05 pm - 9:32 am
ONT
-
HOU
14h 27m
2 stops
$282Delta
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.

How much is a round-trip flight from Houston to Ontario?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Houston to Ontario departing in May.

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 $108 on the route between Houston George Bush Intcntl Airport (IAH) and Ontario (ONT). Over the past month, this route was, on average, 40% 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 August, where tickets cost $178 (return) on average. On the other hand, the most expensive months are December and February, where the average cost of round-trip tickets is $394 and $309 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.
Our travel experts
Stefanie Waldek

Stefanie Waldek

Expert on Frontier and United Airlines

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.

John Walton

John Walton

Expert on IAH

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.

Jennifer Simonson

Jennifer Simonson

Expert on ONT

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.

Yulia Denisyuk

Yulia Denisyuk

Expert on HOU

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.

Good to know

Cheapest flight$98
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 $105 for a one-way ticket and $98 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

Frontier,Southwest,United Airlines

Frontier,Southwest, +1 more

Wednesday

Frontier,Southwest,United Airlines

Frontier,Southwest, +1 more

Thursday

Frontier,Southwest,United Airlines

Frontier,Southwest, +1 more

Friday

Frontier,Southwest,United Airlines

Frontier,Southwest, +1 more

Saturday

Frontier,Southwest,United Airlines

Frontier,Southwest, +1 more

Sunday

Frontier,Southwest,United Airlines

Frontier,Southwest, +1 more

See more direct flights

Direct returns

Ontario to Houston

Monday

Frontier,Southwest,United Airlines

Frontier,Southwest, +1 more

Tuesday

Frontier,Southwest,United Airlines

Frontier,Southwest, +1 more

Wednesday

Frontier,Southwest,United Airlines

Frontier,Southwest, +1 more

Thursday

Frontier,Southwest,United Airlines

Frontier,Southwest, +1 more

Friday

Frontier,Southwest,United Airlines

Frontier,Southwest, +1 more

Saturday

Frontier,Southwest,United Airlines

Frontier,Southwest, +1 more

Sunday

Frontier,Southwest,United Airlines

Frontier,Southwest, +1 more

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 4344 reviews
8.1Boarding
8.0Comfort
8.6Crew
7.0Food
7.5Entertainment
Airline reviews

The Air hostess were very rude on my flight from Houston to Austin . Their regular communication itself felt a they are shouting at people.

4.0 Okaysangeetha, Apr 2026
AUS - SJC
Read more Southwest reviews

The Air hostess were very rude on my flight from Houston to Austin . Their regular communication itself felt a they are shouting at people.

I have roller bag with food and medication told me I couldn't bring on my 2nd flight today. 15 years flying with SW never an issue with that bag.

Boarding was easy. The seats are small and fairly uncomfortable

The problem with the seat assignments is that there were a lot of rows in the front that were empty but my row at the back was full. Just not so pleasant.

No food or entertainment, just a quick 40 minute flight. A little bumpy due to Santa Ana winds but pilot has no control over that. Good flight and landing!

Good but I prefer choose your own seat. With the new assigned seats they should board from the back I see no advantage to this new boarding. Just like every other airline

Mediocre. Boarding is now unpleasant. The employees, once friendly and nice, are now regularly speaking sternly to passengers, badgering them to do things right so they can take off on time and gate check bags because they don't have enough overhead bin space. The pretzel snack was crushed flat and broken into even smaller pieces, which happens frequently lately. Drink service was suspended before they reached my row.

The charges were ridiculous for an hour flight and the turbulence was very scary.

3 hour delay. Had to change plans and was still delayed.

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

I've been flying American mostly, and it's been very frustrating. This united flight makes me realize maybe the issue isn't flying, but the airline. United was a significantly better experience. The plane was more comfortable, with a normal amount of leg room (vs the ridiculous reductions AA has made), more comfortable seats, screens to watch movies. It was a much better experience!

We had excellent customer service despite the chaos at George Bush airport in Houston!

It isvvery small flight. No leg room . No space to put my personal item at feet.

Didn't make the flight because the first leg of my flight was canceled and the next leg was already booked.

Terrible because it was cancelled due to volcanic ash clouds in Guatemala while all other airlines kept flying. Had to pay for a hotel to stay overnight in Houston and try to fly next day.

Overall we had a good experience during our flight from San Francisco to Houston.

Airport terminal was outdated, flight was on a small jet with no wifi

The crew made our experience extremely bad. They were rude and didn’t have anything for kids.

The power at the seat didn't work and the seat itself was difficult to adjust - this was a business class seat. Flight attendant gave me miles to compensate. The attendant was very professional and on top of his game the entire flight.

I like flying first class, and United has a nice one

Delayed for mechanical and no updates on what was happening and how long the delay might be.

A first class seat should fit a fat person, and this doesn't. The trays in the armrest are less functional than an ordinary tray in the back of the seat.

The experience at checkin for my American Airlines flight from Sacramento to LAX was very good including the assistance I received in getting my bags checked in and boarding passes printed. Was pleasantly surprised the my bags were checked through all the way to my destination at Clark International Airport in Angeles, Philippines.

Forced to check bags. Crew uninterested in collecting trash. Unclean seats.

Smooth flight. From the early boarding and all were on board before departure time and arrived early in ONT. Great crew. Thank you!!!!

The flight was significantly delayed for 6.5 hours because of snow. There was no communication once the plane returned to the gate regarding when the flight would resume. Other flights were departing while our flight was being unloaded for reasons unknown. Our flight also seemed out of the queue regarding further deicing, refueling, and waiting to Taxi to the runway.

They are always late and seats was also not having working charger

did not have enough meal for first class passengers so offer us snack

Amazing I love American. I’ll never fly anyone else if I can help it.

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.

My flight was originally from SAT to MCO connecting from MCO to ORD. We got diverted to ATL and than Frontier staff there was sooo un helpful first they said they couldn’t give us any accommodation since our flight first got delayed that cancelled and now it’s 221am and I am still in ATL since they said they need to create a new flight my final destination is ORD and I have been delayed twice and cancelled. With no real help the frontier app didn’t work no email updates over all such a horrible experience

Gate not determined until I got to the airport - hard to plan the trip to the airport.

Our flight was canceled. I will never use Kayak nor Frontier for travel again. The entire experience was a headache.

Very well recently! Frontier is improving and less harrassing customer on luggages! Positive!

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.

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

Information on your arrival and departure airports