$96 Find Cheap Flights from Ontario to Houston

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 Houston departing on 7/29. 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 Houston

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to Houston, 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 Houston, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$193
Typical prices: $380-$194
Frontier
Tue 7/21Tue 7/28
ONT - IAH • Non-stop
Cheapest one-way
$96
Typical prices: $115-$185
Frontier
Wed 7/29
ONT - IAH • 1 stop
Top airlines
Cheapest • from $193 (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 16m
Direct flights
Direct flights
+1
+1
Direct flights
Direct flights
+1
Top routes
Cheapest • 48% average savings
Most popular
Insights
Insights
Insights
Insights
Avoid delays
Most punctual • 93% on-time
Best time • Fewest delays
Insights
Insights
Insights
Insights
When to book
in advance
Our data shows that travelers who book at least 2 weeks in advance save around 37% compared to booking last minute.
Insights
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Expert advice
Flight Deals

Cheap Flights from Ontario to Houston (ONT-HOU)

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

Tue, Jul 21 - Tue, Jul 28
Frontier Logo
9:32 am - 2:52 pm
ONT
-
IAH
3h 20mnonstop
Frontier Logo
6:10 am - 7:32 am
IAH
-
ONT
3h 22mnonstop
$193Frontier
Tue, Jul 21 - Tue, Jul 28
Frontier Logo
9:32 am - 2:52 pm
ONT
-
IAH
3h 20mnonstop
Frontier Logo
6:10 am - 7:32 am
IAH
-
ONT
3h 22mnonstop
$194Frontier
Wed, Jul 15 - Wed, Jul 22
Frontier Logo
9:32 am - 2:52 pm
ONT
-
IAH
3h 20mnonstop
Frontier Logo
6:10 am - 7:32 am
IAH
-
ONT
3h 22mnonstop
$195Frontier
Fri, Jul 24 - Wed, Jul 29
Frontier Logo
9:32 am - 2:52 pm
ONT
-
IAH
3h 20mnonstop
Frontier Logo
6:10 am - 7:32 am
IAH
-
ONT
3h 22mnonstop
$196Frontier
Thu, Aug 6 - Mon, Aug 10
Frontier Logo
9:32 am - 2:52 pm
ONT
-
IAH
3h 20mnonstop
Frontier Logo
6:10 am - 7:32 am
IAH
-
ONT
3h 22mnonstop
$197Frontier
Fri, Jul 31 - Sat, Aug 8
Frontier Logo
9:32 am - 2:52 pm
ONT
-
IAH
3h 20mnonstop
Frontier Logo
6:10 am - 7:32 am
IAH
-
ONT
3h 22mnonstop
$198Frontier
Sun, Aug 16 - Sat, Aug 29
Frontier Logo
9:32 am - 2:52 pm
ONT
-
IAH
3h 20mnonstop
Frontier Logo
4:21 pm - 5:52 pm
IAH
-
ONT
3h 31mnonstop
$199Frontier
Tue, Jul 7 - Thu, Aug 6
Frontier Logo
9:32 am - 2:52 pm
ONT
-
IAH
3h 20mnonstop
Frontier Logo
6:10 am - 7:32 am
IAH
-
ONT
3h 22mnonstop
$200Frontier
Wed, Aug 5 - Tue, Aug 11
Southwest Logo
12:30 pm - 5:35 pm
ONT
-
HOU
3h 05mnonstop
Southwest Logo
8:50 pm - 10:05 pm
HOU
-
ONT
3h 15mnonstop
$297Southwest
Tue, Aug 25 - Mon, Aug 31
Southwest Logo
12:30 pm - 5:35 pm
ONT
-
HOU
3h 05mnonstop
Southwest Logo
8:05 am - 9:15 am
HOU
-
ONT
3h 10mnonstop
$305Southwest
Booking Insights

KAYAK's insights & trends for Ontario to Houston flights

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

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

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

What is the cheapest Ontario to Houston flight route?

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

The cheapest return flight from Ontario to Houston costs $128 on the route between Ontario (ONT) and Houston George Bush Intcntl Airport (IAH). Over the past month, this route was, on average, 48% cheaper than other Ontario-Houston routes. It is also the most popular route.

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

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

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

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Ontario to Houston, 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 Ontario to Houston is September, where tickets cost $34 (return) on average. On the other hand, the most expensive months are January and June, where the average cost of round-trip tickets is $102 and $95 respectively.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Ontario to Houston, 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 Ontario to Houston, you should book around 2 weeks before departure, which saves you about 37% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 9 weeks before departure.

Expert advice

Expert advice for your flight from Ontario to Houston

 
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
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$96
Flight from Ontario to Houston George Bush Airport

When to book flights from Ontario to Houston

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

  • What is the cheapest flight from Ontario to Houston?

    In the last 5 days, the lowest price for a flight from Ontario to Houston was $96 for a one-way ticket and $193 for a round-trip.

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

    Yes

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

    On your way to Houston, you’ll fly out from Ontario. You’ll be landing in one of Houston’s 2 airports: Houston Hobby or Houston George Bush Intcntl.

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

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

  • Which airline alliances offer flights from Ontario to Houston?

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

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

    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 Houston.

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

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

    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 Houston with an airline and back to Ontario with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Ontario to Houston?

    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 Houston from Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Prefer to fly direct from Ontario to Houston?

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

Direct departures

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

Direct returns

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

Reviews of the top 4 airlines serving from Ontario to Houston

 
See real verified KAYAK customer reviews for airlines flying from Ontario to Houston. 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 Houston? 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 4254 reviews
8.1Boarding
7.0Food
7.5Entertainment
8.6Crew
8.0Comfort
Airline reviews

One major problem that was very unprofessional and uncalled for. Plane landed and we had to wait 20 minutes to get off the plane since they were waiting for someone to come to the gate to drive the jetway. Southwest couldn't have someone available and waiting for the plane to land? Is there only one person in Hobby airport who knows to drive the jetway? Was he at lunch? In the bar? Uncomfortable and uncalled for!

4.0 OkayAnonymous, May 2026
MSY - HOU
Read more Southwest reviews

One major problem that was very unprofessional and uncalled for. Plane landed and we had to wait 20 minutes to get off the plane since they were waiting for someone to come to the gate to drive the jetway. Southwest couldn't have someone available and waiting for the plane to land? Is there only one person in Hobby airport who knows to drive the jetway? Was he at lunch? In the bar? Uncomfortable and uncalled for!

Southwest is kind of a slum airline. It’s gotten more expensive over the years for less and less service. I am a Southwest Chase Visa card holder and was forced to choose a seat in the 26th row in the middle seat. However my wife who is a rewards member but doesn’t hold a card or anything else, gets randomly assigned a normally paid seat in row 6! How does that work?

The seat was not comfortable. 1D. My back was sore all night and the next day.

One of the best airlines for fast boarding, on time arrivals, and top notch service!

I elected to pay for the upgrades and found very little difference

The new seating arrangement is so over priced for what you get.

Snacks are always pretzels. Why can't you also offer peanuts ?

Flight was hours late, unable to sit next to spouse, I have had so much better experiences. Substantially better, only saving grace was that it was a short flight.

An entire day of delays. Cost lots of money. Meals and a hotel.

Only downside was the legroom and seat width, which is always a problem unless I spend more for a premium seat.

Even through the flight was delayed due to storms near IAH The flight was great! The crew was so hospitable and professional

Seat pitch is horrible especially on the 15 hour flight. Gate crew at SFO was Outstanding. The flight crew was also great.

The flight had a delay but I made it to my connection. Flight was smooth overall

No screens or meal options. Freezing cold. Dirty seats. Left late.

Overall flight was ok. Flight attendant was receptive to assisting passengers with tight connections.

This was the first flight in the morning. We boarded fine. The cabin door was closed and we were ready to go. We were notified by the Captain that ATC issued and ground stop for 40 minutes. So, without even pushing back from the gate, we were already 40 minutes late. We actually were released to push-back and taxi at 30 minutes. But, some passengers had tight connections and were not going to make their connections. Some passengers asked about the delay and the effect on the connections and were told by the cabin attendant that all flights will be delayed and so they should be OK. However, that was not true. My connecting flight was on time and I arrived at IAH with 21 minutes to make my connection. I did and I'm happy about that, but the flight crew should not have given assurances to the passengers who might have missed their connections.

Boarding was again a "free for all". We were boarding group 4, and almost the entire plane was able to board before us. It's a shame that someone who follows the rules, gets the short end of the stick. Not fair.

Fine. The issues I had were associated with luggage being delayed from Turkey to Tanzania

We purchase first class seats for the first time for multiples of standard economy ticket. There was no access to the club lounge and no priority boarding. The meal and the service once on the plane were superior and the seat was nicer, but not worth the price difference. I will be happy to seat in economy and spend the difference on more travel.

My flight was canceled a few hours before boarding. I was rebooked on Copa airlines and missed an important meeting .

The flight took off an hour late which made the connection concerning

The flight from Dallas to Tokyo was not on Japan Airlines. It was on American Airlines. Very disappointed that we did not fly on Japan Airlines. Will not be using you liars again. I’ll just book direct from the airline next time. Wish you could make this right and has us fly on Japan Air when heading back home to the US.

They made nearly everyone check their bag because the overhead bins are way too small. Extremely inconvenient

It was what i expected. I like the movies you can access from your phone. It would be nice if there was a gluten free snack offered. But I did bring my own snack knowing there would not be a gluten free option

Ontario airport boarding was very easy to park and access, is clean and TSA took 10 minutes total. Check-in was a breeze and cruise was very nice.

We got delayed getting out of DFW for broken overhead bins. Once the flight got underway the captain kept the seatbelt sign lit the entire flight despite little perceptible turbulence, preventing use of the rest rooms and any sort of refreshment service in the main cabin.

There were flight delays making our flight arrive at our destination after midnight didn’t seem to have enough crew or airplanes for the flights laid over in Dallas should’ve had plenty of time to make it to our next flight only made it because that flight was also delayed because our plane wasn’t even at the airport yet overall have not had a good experience on American

Seat comfort was poor (no lumbar or lower back support).

The passenger in front of of me reclined their seat back all the way the entire flight. Their headrest was in my face the entire flight! I barely had room for the little plastic cup of water to fit on my tray table; can you make the seats and space between the rows any smaller??? You can’t even get up to use the restroom! Worst flight I’ve had in a very long time!

My Frequent Flyer nber wasn't put on as I was told it was..... This resulted in a last group boarding and no priority tags on My bags.

They didn’t offer a water, even after I asked

Remind customers of the need to have passport or new ID for boarding.

The flight never took off and we spent 7 hours at the airport

It was ok. It was expensive to check 2 bags ($75.00 per bag), and then it took a long time to wait for shuttle to take us from one terminal to the terminal where the plane was taking off at LAX. And all of this for a flight where we had to pay for any food or drink that was not water.

When I wanted to check in 3 hours prior to boarding time, the employees mentioned “a little over an hour delay” so I waited for an hour then I went to go look for food in the terminal and most people from that flight were in the same area looking for food. Finally I decided after food to check to see if it’s anytime closer and now it’s 2 mins until boarding closes?! What are you kidding me? I didn’t receive anything via sms about boarding now nor via email or on the intercom. I luckily made it through, barely, and then there’s no room for my carry on mind you I’m in the very first row so I had to place my purse in one further row back and my carry on sections down. Not sure who pays for better seats to get your stuff placed all over the plane but that was the worst experience I’ve ever had flying with anyone.

This airline sucks. They offer low rates then charge you for everything, the app does not work well, the seats are the most uncomfortable. Maintenance issues on the flight, and you still have to sit through their credit card commercials. People are nice enough but does not make up for overall poor experience.

baggage clamed had to wait over a hour and half for all people on my flight it was terrible

My flight was canceled I was promised a reginf still not received.

The confirmation # CK8GNW and my name was not recognized/in Frontier system. I was able to check in on Frintier app so i went to the Frontier ticket agent, at time they told me that my name/ confirmation did not show up as a purchased ticket. I had to purchase a new ticket that cost $289.00 one way.

Cancelled flight after I arrived at airport after 75 min drive and parking. Next flight was 4 days in the future. Had to scramble and buy a much more expensive flight on another carrier.

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

Information on your arrival and departure airports