ONT - IAH

$57 Find Cheap Flights from Ontario to Houston George Bush Airport

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 George Bush Intcntl departing on 12/15. 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 George Bush Intcntl Airport

 
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
Travelers love KAYAK
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Everything you should know

Cheapest round-trip
$109
Overall average: $318
Frontier
Thu 2/5Mon 2/9
ONT - IAH • 1 stop
Cheapest non-stop
$115
Typical prices: $149-$389
Frontier
Mon 12/8Mon 12/15
ONT - IAH • Non-stop
Our travelers' advice
AI-powered summary based on content written by travel experts. AI can make mistakes.
Frontier's Economy Bundle includes carry-on and seat choice.
Expect ample parking and easy security at Ontario.
Expert advice
Expert advice
Expert advice
Expert advice
When to book
2 weeks
in advance
Our data shows that travelers who book at least 2 weeks in advance save around 37% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
March
Cheapest • 22% price drop
December
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to George Bush Intcntl!
Flight Deals
Booking Insights
Expert advice
Flight Deals

Cheap Flights from Ontario to George Bush Intcntl (ONT-IAH)

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

Thu, Feb 5 - Mon, Feb 9
Frontier Logo
6:20 am - 2:16 pmONT-IAH
5h 56m1 stop
Frontier Logo
10:51 am - 12:43 pmIAH-ONT
3h 52mnonstop
$109Frontier
Find Deal
Fri, Jan 23 - Sun, Jan 25
Frontier Logo
1:46 pm - 7:07 pmONT-IAH
3h 21mnonstop
Frontier Logo
10:12 pm - 7:10 pmIAH-ONT
22h 58m1 stop
$110Frontier
Find Deal
Thu, Jan 22 - Mon, Jan 26
Frontier Logo
6:20 am - 12:33 amONT-IAH
16h 13m1 stop
Frontier Logo
10:51 am - 12:43 pmIAH-ONT
3h 52mnonstop
$111Frontier
Find Deal
Fri, Jan 23 - Sun, Jan 25
Frontier Logo
1:46 pm - 7:07 pmONT-IAH
3h 21mnonstop
Frontier Logo
10:12 pm - 12:10 pmIAH-ONT
15h 58m1 stop
$118Frontier
Find Deal
Wed, Jan 14 - Sat, Jan 17
Frontier Logo
7:15 am - 6:36 pmONT-IAH
9h 21m1 stop
Frontier Logo
4:10 pm - 10:59 pmIAH-ONT
8h 49m1 stop
$120Frontier
Find Deal
Tue, Jan 13 - Fri, Jan 16
Frontier Logo
7:15 am - 10:55 pmONT-IAH
13h 40m1 stop
Frontier Logo
12:15 pm - 2:08 pmIAH-ONT
3h 53mnonstop
$125Frontier
Find Deal
Wed, Jan 7 - Fri, Jan 9
Frontier Logo
7:00 am - 12:31 amONT-IAH
15h 31m1 stop
Frontier Logo
7:41 pm - 9:23 pmIAH-ONT
3h 42mnonstop
$126Frontier
Find Deal
Thu, Jan 22 - Sat, Jan 24
Frontier Logo
6:20 am - 2:16 pmONT-IAH
5h 56m1 stop
Frontier Logo
7:00 pm - 11:24 pmIAH-ONT
6h 24m1 stop
$127Frontier
Find Deal
Thu, Feb 5 - Mon, Feb 9
Frontier Logo
6:20 am - 2:16 pmONT-IAH
5h 56m1 stop
Frontier Logo
4:47 pm - 12:20 amIAH-ONT
9h 33m1 stop
$128Frontier
Find Deal
Thu, Jan 22 - Mon, Jan 26
Frontier Logo
6:20 am - 2:16 pmONT-IAH
5h 56m1 stop
Frontier Logo
8:02 pm - 12:20 amIAH-ONT
6h 18m1 stop
$129Frontier
Find Deal
Booking Insights

KAYAK's insights & trends for Ontario to George Bush Intcntl flights

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

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

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

For Ontario to Houston George Bush Airport, Friday is the cheapest day to fly on average and Sunday is the most expensive. Flying from Houston George Bush Airport back to Ontario, the best deals are generally found on Friday, with Saturday being the most expensive.

What is the cheapest month to fly from Ontario to Houston George Bush Intcntl Airport?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Ontario to Houston George Bush Intcntl Airport, 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 George Bush Intcntl Airport is March, where tickets cost $184 (return) on average. On the other hand, the most expensive months are February and December, where the average cost of round-trip tickets is $318 and $276 respectively.

How far in advance should I book a flight from Ontario to Houston George Bush Intcntl Airport?

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 George Bush Intcntl Airport, 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 George Bush Intcntl Airport, 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 13 weeks before departure.

Expert advice

Expert advice for your flight from Ontario to George Bush Intcntl

 
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 Economy Bundle includes a carry-on and seat choice, ideal for budget travelers.


Opt for Premium Bundle for priority boarding and extra legroom, just $20 more than Economy.

United Airlines

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


Purchase Priority Boarding to ensure overhead bin space, placing you in Zone 2.

Airports
ONT

ONT offers ample parking options and streamlined security, making it a stress-free departure point for travelers heading to Houston.

IAH

For arrivals at IAH, rideshare apps like Uber and Lyft are convenient, with pickup points at Terminals A, B, and C.

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

Good to know

Low seasonSeptember
Cheapest flight$57
Best time to beat the crowds but there is an average 15% increase in price.
Most popular time to fly with an average 17% increase in price.
Flight from Ontario to Houston George Bush Airport

When to book flights from Ontario to George Bush Intcntl

Are your dates flexible? Find out the best times to travel from Ontario to George Bush Intcntl 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 Ontario to Houston George Bush Airport flights

  • What is the cheapest flight from Ontario to Houston George Bush Intcntl Airport?

    In the last 3 days, the lowest price for a flight from Ontario to Houston George Bush Intcntl Airport was $57 for a one-way ticket and $109 for a round-trip.

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

    No

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

    Ontario airport is called Ontario and the only airport in Houston George Bush Airport is Houston George Bush Intcntl.

  • Which airlines offer Wi-Fi service onboard planes from Ontario to Houston George Bush Airport?

    Alaska Airlines, Delta, JetBlue, American Airlines, and Aeromexico offer inflight Wi-Fi service on the Ontario to Houston George Bush Airport flight route.

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

    The Boeing 737-900 is the aircraft model that flies most regularly on the Ontario to Houston George Bush Airport flight route.

  • Which airline alliances offer flights from Ontario to Houston George Bush Airport?

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

  • On which days can I fly direct from Ontario to Houston George Bush Airport?

    There are nonstop flights from Ontario to Houston George Bush Airport on a daily basis.

  • Which is the best airline for flights from Ontario to Houston, United Airlines or American Airlines?

    The two airlines most popular with KAYAK users for flights from Ontario to Houston are United Airlines and American Airlines. With an average price for the route of $377 and an overall rating of 7.4, United Airlines is the most popular choice. American Airlines is also a great choice for the route, with an average price of $377 and an overall rating of 7.2.

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

    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 George Bush Airport.

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

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

    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 George Bush Airport with an airline and back to Ontario with another airline. Booking your flights between Ontario and IAH can sometimes prove cheaper using this method.

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

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

KAYAK’s top tips for finding a cheap flight from Ontario to Houston George Bush Intcntl Airport

  • Looking for a cheap flight? 25% of our users found flights on this route for $139 or less one-way and $250 or less round-trip.

Prefer to fly direct from Ontario to Houston George Bush Airport?

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

Direct departures

Ontario to Houston George Bush Intcntl

Monday

Frontier, United Airlines

Frontier, United Airlines

Tuesday

United Airlines

United Airlines

Wednesday

Frontier, United Airlines

Frontier, United Airlines

Thursday

United Airlines

United Airlines

Friday

Frontier, United Airlines

Frontier, United Airlines

Saturday

United Airlines

United Airlines

Sunday

Frontier, United Airlines

Frontier, United Airlines

See more direct flights

Direct returns

Houston George Bush Intcntl to Ontario

Monday

Frontier, United Airlines

Frontier, United Airlines

Tuesday

United Airlines

United Airlines

Wednesday

Frontier, United Airlines

Frontier, United Airlines

Thursday

United Airlines

United Airlines

Friday

Frontier, United Airlines

Frontier, United Airlines

Saturday

United Airlines

United Airlines

Sunday

Frontier, United Airlines

Frontier, United Airlines

See more direct flights

Reviews of the top 3 airlines serving from Ontario to George Bush Intcntl

 
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 George Bush Intcntl? 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.
7.4
United AirlinesOverall score based on 9064 reviews
7.7Boarding
7.1Entertainment
7.3Comfort
8.1Crew
6.6Food
Airline reviews

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

8.0 ExcellentAnonymous, Nov 2025BTR - IAH
Read more United Airlines reviews

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. .

I flew with my dog and had already purchased my dog’s ticket. Even that morning I had called costumer service to insure that my husband and I had seats together since the website was giving me an error when choosing our seats and the representative mentioned our dog. I showed up early to the airport and when I got to the gate and we started boarding I was help back and told that I was supposed to have a yellow tag and that I should have checked in at the counter for them to give me that tag. I was not aware of this, the representative on the phone did not say anything. Nor did I see it anywhere in the checking process online, so if you travel with a pet and are not checking in luggage, just know that you still have to go to the check in counter when arriving at the airport unless you want to be the last one to board and not have room for your carry on in the overhead bins. Other than that, I had a great experience.

This flight was perfect. No complaints and only the highest regard for the crew and ground staff and how they executed perfectly. I fly a lot with United and would request predictability and transparency in their operations instead of last minute changes.

This is for UA2274 from Houston to Sacramento. The flight was delayed arriving due to mechanical issues so we left about 3 hours later than scheduled. When boarding the plane the temperature inside was excessive - likely close to 100. Pilot apologized and said it was going to improve at altitude, which it did. But before that I honestly thought there might have been more delays removing passengers made ill from the heat. We were delayed leaving due to another mechanical issue. There was not water on the plane due to a panel that was not secured. They did that quickly, but the combination of mechanical issues was rather disturbing and did not reflect well on United.

United sent me a mileage plus number last year but that number is invalid so I can’t use it to check into flights or collect mileage. There is human to speak about the problem, only computers who keep asking me if I am using the correct email. It’s so frustrating and I cannot resolve it.

After arriving in Dallas, the aircraft taxied for an unusually long time and was unable to park at the gate, which caused a significant delay and made me miss my connecting flight. I then had to wait in a very long line to be rebooked, and I was told that no hotel or meal accommodations would be provided. What is even more unacceptable is that my luggage was mishandled and has still not been located. My suitcase contains important medications that I urgently need, and I have been unable to access them due to the airline’s mishandling. This situation has caused me considerable stress and inconvenience, and I need this issue to be resolved immediately.

I appreciated that it was on time, safe and professional. I didn’t like that I wasn’t in a place where I had a window at my window seat. It would have been nice to know that in advance. If it was mentioned in the ticketing, I didn’t notice it.

I have a gluten allergy so didn't have any food

Baggage handling poor. Second time this has happened. My bag went to San Francisco instead of Fiji. No apology. Luckily Nadi airport staff are fantastic. My bag arrived in Fiji the next day.

Wish a flight with more than 2 hours with some snack rather than just cookie/biscuit.

Flight delayed and missed connection. Rescheduled flight cancelled after 6 hrs wait. Rerouted thru ORD, flight cancelled, overnight stay in ORD. Still in the air on new flight!

Delayed delayed delayed and no offer for food or vouchers

A couple ladies from the crew were so rude and nasty. Thought they were mad at having to be there especially if you asked a question. This will make me think twice next time if I book a flight with you.

Always seated jammed in rear of aircraft Admirals Club food at DFW terminal D was absolute worst food experience and I pay $600/year to eat this dried out junk

Flight attendants on this flight were very attentive and friendly

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.

It was a short flight so no food or entertainment….

Everything you need to know for your flight from Ontario to George Bush Intcntl

Information on your arrival and departure airports