$55 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 3/16. 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
$129
Overall average: $346
Frontier
Wed 2/4Wed 2/18
ONT - IAH • 1 stop
Cheapest non-stop
$156
Typical prices: $209-$503
Frontier
Mon 2/9Mon 2/16
ONT - IAH • Non-stop
Our travelers' advice
AI-powered summary based on content written by travel experts. AI can make mistakes.
Southwest's two free checked bags suit luggage needs.
HOU is closer to downtown than IAH, saving travel time.
Expert advice
Expert advice
Expert advice
Expert advice
Top airlines
United Airlines
Cheapest • from $331 (round-trip)
Southwest
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Top routes
ONT
-
IAH
Cheapest • 18% average savings
ONT
-
IAH
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 31% compared to booking last minute.
Insights
Insights
Insights
Insights
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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

Wed, Feb 4 - Wed, Feb 18
Frontier Logo
7:15 am - 3:13 pm
ONT
-
IAH
5h 58m
1 stop
Frontier Logo
6:45 am - 9:34 am
IAH
-
ONT
28h 49m
1 stop
$129Frontier
Wed, Feb 11 - Tue, Feb 17
Frontier Logo
8:10 am - 7:14 pm
ONT
-
IAH
9h 04m
1 stop
Frontier Logo
6:45 am - 9:34 pm
IAH
-
ONT
16h 49m
1 stop
$142Frontier
Sat, Jan 31 - Tue, Feb 3
Frontier Logo
7:15 am - 3:13 pm
ONT
-
IAH
5h 58m
1 stop
Frontier Logo
10:30 am - 3:07 pm
IAH
-
ONT
6h 37m
1 stop
$147Frontier
Tue, Feb 10 - Mon, Feb 16
Frontier Logo
8:36 am - 11:32 pm
ONT
-
IAH
12h 56m
1 stop
Frontier Logo
10:31 am - 12:23 pm
IAH
-
ONT
3h 52mnonstop
$148Frontier
Fri, Feb 27 - Wed, Mar 4
Frontier Logo
1:18 pm - 6:39 pm
ONT
-
IAH
3h 21mnonstop
Frontier Logo
6:45 am - 9:34 pm
IAH
-
ONT
16h 49m
1 stop
$149Frontier
Wed, Feb 18 - Sat, Feb 21
American Airlines Logo
11:58 pm - 9:43 am
ONT
-
HOU
7h 45m
1 stop
American Airlines Logo
6:00 am - 4:19 pm
HOU
-
ONT
12h 19m
1 stop
$330American Airlines
Wed, Feb 18 - Tue, Feb 24
Southwest Logo
5:15 am - 10:15 am
ONT
-
HOU
3h 00mnonstop
Southwest Logo
3:35 pm - 5:10 pm
HOU
-
ONT
3h 35mnonstop
$333Southwest
Tue, Mar 10 - Tue, Mar 17
Southwest Logo
6:00 am - 12:45 pm
ONT
-
HOU
4h 45m
1 stop
Southwest Logo
9:30 pm - 11:05 pm
HOU
-
ONT
3h 35mnonstop
$339Southwest
Sat, Feb 14 - Tue, Feb 17
American Airlines Logo
11:58 pm - 9:43 am
ONT
-
HOU
7h 45m
1 stop
American Airlines Logo
6:00 am - 10:06 am
HOU
-
ONT
6h 06m
1 stop
$351American Airlines
Wed, Mar 25 - Wed, Apr 8
Delta Logo
12:50 pm - 10:42 pm
ONT
-
HOU
7h 52m
1 stop
Delta Logo
6:00 am - 11:40 am
HOU
-
ONT
7h 40m
1 stop
$353Delta
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.

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 $181 on the route between Ontario (ONT) and Houston George Bush Intcntl Airport (IAH). Over the past month, this route was, on average, 18% 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 Wednesdays and the most expensive ones on Saturdays.

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 March, where tickets cost $195 (return) on average. On the other hand, the most expensive months are November and December, where the average cost of round-trip tickets is $362 and $267 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 31% 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.
Airports
ONT

ONT offers streamlined security with average wait times of 6-15 minutes, making it ideal for quick departures.

IAH

For domestic arrivals at IAH, head through baggage claim in your terminal to ground transportation.

HOU

HOU is closer to downtown than IAH, making rideshares about twice as fast and cheaper.

Our travel experts
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 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 3 days, the lowest price for a flight from Ontario to Houston was $55 for a one-way ticket and $129 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

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

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

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 4255 reviews
7.5Entertainment
8.0Comfort
8.6Crew
8.1Boarding
7.0Food
Airline reviews

We got exit row seats both flights. Everything was running on time

10.0 ExcellentMaggie, Jan 2026
FAT - LAS
Read more Southwest reviews

We got exit row seats both flights. Everything was running on time

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.

No delays and arrived to destination 30 min early. Staff was super friendly.

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

Crew could have been friendlier, maybe I'm spoiled by SW crews. In flight wifi was good. Would be nice to have more food offerings on a 4 plus hour flight

Everything a cheap airline should be at normal airline rates.

Full cans of soda would be nice. A choice between two snacks would be appreciated.

Tried watching free movie and it kept freezing so I couldn’t finish.

I was re-booked onto another flight because my original flight was delayed and I would have missed my connector. I ended up in the “C” group after paying extra to be in the “A “ group on the original flight. At least if you’re going to re-book people, re-book them into the same group.

Check-in, boarding and the flight from Phoenix to Houston was quick and easy. The flight from Houston to Shreveport was delayed 5 hours. It was frustrating but I think United handled it the best they could.

The staff was hospitable and professional. The seat had a bit of wear. The winner shade was stuck 1/4 open. I received the best of both worlds. The morning sun was able to come in and blind the screen i was trying to use while at the same time it was too low to look out and enjoy the view. Rather embarrassing for a 1st class ticket.

United is an incompetent airline. They parked the plane on the tarmac for an hour after arriving because they “didn’t have a gate available” it was actually some sort of lie because as we de planed there were approximately 9 open and manned and empty gates that we walked past. Many people on the flight missed connections for the hour long sit on the tarmac. Utterly baffling and incompetent behavior from United flight ops.

I boarded flight UA#1318 at Sacramento International Airport going back to Houston TX. The flight was scheduled at 5:10am. I was able to check in virtually using the United Airlines app. When I entered the airport, there was no one outside assisting with checked bags as it was for Delta Airlines. Immediately upon entering, there was a LONG, EXTREMELY LONG line to the kiosks to get boarding passes. I stand in line to get boarding passes then had to move to ANOTHER EXTREMELY LONG line to get my bags checked in. While standing in this line, we noticed an agent taking customers to 3 at a time to her station to check their bags in. Lucky for me, she called me back, checked my bags for me and I was on my way. I then encountered another long line at the TSA check and to avoid I ending up having to sign up for CLEAR to bypass it. So glad, I did.,...Both of my flights were great with no issues, butthe check in progress at Bush Airport was so much smoother. Check-in at SMF airport needs to be anaylzed and corrected. Do better United, I know you can....thanks

Ot was overall fine. Left on time and had basic snacks. Weather was finicky but that’s not the airlines fault.

Even though we were delayed, we were able to make our connection

Crew and customer service were excellent. This flight also had plenty of leg room and seat mounted screens for entertainment. A very pleasant flight all around!

I was in first class. The outlets at my seat did not work. The plane was shabby and run down. I had prepurchsed a day subscription for internet that was not redeemable. I had to repurchase the internet for my flight and then it didn’t work anyway. Quite disappointed in what was supposed to be the launch of a great vacation.

Flight was good and crew was super polite. However, there were around 5 kids screaming the WHOLE 2 hours. I understand kids have to come but parents need to do something to control their children. They make the experience terrible, especially after finishing 16 hour shifts at the hospital I needed some sleep, which I did not get.

Armrest controller on my seat 35D and nextbooennseat 35E did not work right. Hard to press buttons to recognize and 35D had constantnpressure either upmost down somit was nearly impossible to make selections. .

The flight was good. We had to spend almost an hour on the tarmac when we arrived in Dallas. Waiting for a gate. What’s the point of arriving early if you have no gate to park at?

Lower WiFi prices; allow us to see our flight on a map; more variety of drink choices.

The flight was on time and arrived early. The crew were friendly and helpful.

Kayak was among the missing. There was not the usual advice regarding next gate after arriving in Dallas. No communication after the reminder to check in before the Moline flight. What happened?

They should have allowed for extra time to de-ice the plane before boarding passengers. This delayed us about 10-15 mins after we boarded. Overall experience was fine. Crew was friendly and on top of everything. We didn’t have any issues during the flight.

Our flight from Eagle to Vail was delayed to the point we missed our connection to Savannah. Now we’re a family of 4 in a hotel room with luggage, no toiletries, no clean clothes. Gate attendant said the delay was mechanical but it was put in the system as something else so no compensation. That’s just wrong.

I take this flight about 6-8 times per year. It is convenient and saves an hour or two by skipping PDX, SEA, PHX, or ORD (but it takes longer to get bags to the carousel than Alaska Airlines). I wish the food service were better (but they might cut back on it because it is a red-eye). The WifI seems to go down about an hour out of Anchorage, and then comes back about an hour later...so be warned if this is an issue for you.

WiFi didn’t work the entire flight. Very disappointing. Minimal food and options - sadly the state of current affairs. All other aspects of the flight were fine.

For whatever reason, the flight was not catered -we were told it would be a 45 minute delay waiting for catering - so no food. There were opened candy and peanuts in the seatback pocket. Flight landed early in DFW but due to the assigned gate not being available, we sat on the ground for 30 minutes waiting for the gate to open - making the flight actually arrive at the gate late.

The boarding was as always, the crew tried their best but not enough. The food was a disaster I had dietary restrictions that were half met because the company did not loaded the food for the flight. The entertainment screen was fine but content was not and also they removed the free messaging option from the flight and they charged 30 dollars for that crappy bandwidth. This flight is not worth the cost and the company is going down on quality.

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.

I liked the turn-style feature at gate 209B at LAX. Very efficient process. The gate staff also made several, clearly directed announcements so I felt very informed.

Worst airline experience. They were rude and kept changing our seats and/or giving our seats away so our family didn’t get to sit with each other. Almost everyone we dealt with at both airports with this airline was rude. The app kept giving us wrong information making things take longer. Dealing with them before TSA can take close to an hour…longer than I’ve ever had to deal with before. Never using this airline again.

The seats were awful, hard plastic covered in sheet vinyl. The airline tries to scam you into paying extra to get seat together when the flight wasn’t full. They were going to separate a family with young children but my wife who had a row to herself gave up her seat so the young mom could be with her young boys. I’m never giving this airline my money again.

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

Information on your arrival and departure airports