IAH - ONT

$109 Find Cheap Flights from Houston George Bush Airport to Ontario - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from George Bush Intcntl to Ontario departing on 9/29. 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

Save 20% or more on flights. Compare deals from all over the web.

Never overpay with our price tracking tools.

Filter searches by price, airline and more to find your best flights.

Everything you should know

Cheapest round-trip
$144
Typical prices: $143-$212
Frontier
Sat 9/5Tue 9/8
IAH - ONT • Non-stop
Cheapest one-way
$109
Typical prices: $100-$245
Frontier
Tue 9/29
IAH - ONT • 1 stop
Advice from real travelers
AI-powered summary based on content written by travel experts. AI can make mistakes.
Frontier Economy Bundle adds a carry-on and seat choice for budget value.
United Economy Plus gives up to six extra inches of legroom on this route.
Expert advice
Expert advice
Expert advice
Expert advice
Top airlines
Cheapest • from $144 (round-trip)
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
You can fly direct with Frontier and United Airlines. Average duration is 3h 23m
Direct flights
Direct flights
+1
+1
Direct flights
Direct flights
+1
When to book
in advance
Our data shows that travelers who book at least 3 weeks in advance save around 53% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 45% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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!
Flight Deals
Booking Insights
Expert advice
Flight Deals

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

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

Sat, Sep 5 - Tue, Sep 8
Frontier Logo
5:38 pm - 7:01 pm
IAH
-
ONT
3h 23mnonstop
Frontier Logo
10:59 am - 4:23 pm
ONT
-
IAH
3h 24mnonstop
$144Frontier
Tue, Aug 18 - Tue, Aug 25
Frontier Logo
5:38 pm - 7:01 pm
IAH
-
ONT
3h 23mnonstop
Frontier Logo
10:59 am - 4:23 pm
ONT
-
IAH
3h 24mnonstop
$146Frontier
Sat, Aug 8 - Sat, Aug 15
Frontier Logo
6:10 am - 7:32 am
IAH
-
ONT
3h 22mnonstop
Frontier Logo
9:36 am - 2:56 pm
ONT
-
IAH
3h 20mnonstop
$155Frontier
Thu, Aug 6 - Thu, Aug 13
Frontier Logo
6:10 am - 7:32 am
IAH
-
ONT
3h 22mnonstop
Frontier Logo
9:36 am - 2:56 pm
ONT
-
IAH
3h 20mnonstop
$156Frontier
Thu, Aug 6 - Tue, Aug 11
Frontier Logo
6:10 am - 7:32 am
IAH
-
ONT
3h 22mnonstop
Frontier Logo
9:36 am - 2:56 pm
ONT
-
IAH
3h 20mnonstop
$158Frontier
Wed, Aug 19 - Mon, Aug 24
Frontier Logo
5:38 pm - 7:01 pm
IAH
-
ONT
3h 23mnonstop
Frontier Logo
9:33 am - 2:53 pm
ONT
-
IAH
3h 20mnonstop
$159Frontier
Wed, Aug 19 - Mon, Aug 24
Frontier Logo
5:38 pm - 7:01 pm
IAH
-
ONT
3h 23mnonstop
Frontier Logo
9:33 am - 2:53 pm
ONT
-
IAH
3h 20mnonstop
$160Frontier
Tue, Aug 4 - Wed, Aug 5
Frontier Logo
6:14 pm - 11:50 pm
IAH
-
ONT
7h 36m
1 stop
Frontier Logo
9:36 am - 2:56 pm
ONT
-
IAH
3h 20mnonstop
$161Frontier
Wed, Aug 5 - Wed, Aug 5
Frontier Logo
6:10 am - 7:32 am
IAH
-
ONT
3h 22mnonstop
Frontier Logo
9:36 am - 2:56 pm
ONT
-
IAH
3h 20mnonstop
$163Frontier
Sat, Aug 1 - Tue, Aug 4
Frontier Logo
6:10 am - 7:32 am
IAH
-
ONT
3h 22mnonstop
Frontier Logo
9:36 am - 2:56 pm
ONT
-
IAH
3h 20mnonstop
$165Frontier
Booking Insights

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

Get data-powered insights and trends into flights from George Bush Intcntl 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 George Bush Intcntl Airport 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 George Bush Intcntl Airport to Ontario departing in September.

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

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

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

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Houston George Bush Intcntl Airport 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 George Bush Intcntl Airport to Ontario is November, where tickets cost $133 (return) on average. On the other hand, the most expensive months are April and December, where the average cost of round-trip tickets is $358 and $339 respectively.

How far in advance should I book a flight from Houston George Bush Intcntl Airport 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 George Bush Intcntl Airport 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 George Bush Intcntl Airport to Ontario, you should book around 3 weeks before departure, which saves you about 53% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 6 weeks before departure.

Expert advice

Expert advice for your flight from George Bush Intcntl 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.

Good to know

Low seasonFebruary
Cheapest flight$109
Best time to beat the crowds with an average 31% drop in price.
Most popular time to fly with an average 14% increase in price.
Flight from Houston George Bush Airport to Ontario

When to book flights from George Bush Intcntl to Ontario

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

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

    In the last 5 days, the lowest price for a flight from Houston George Bush Intcntl Airport to Ontario was $109 for a one-way ticket and $144 for a round-trip.

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

    No

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

    Houston George Bush Airport and Ontario are both served by 1 main airport. You will leave Houston George Bush Airport from Houston George Bush Intcntl and will be arriving at Ontario.

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

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

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

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

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

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

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

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

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

    The two airlines most popular with KAYAK users for flights from Houston to Ontario are United Airlines and American Airlines. With an average price for the route of $398 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 $400 and an overall rating of 7.1.

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

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Ontario from Houston George Bush Airport 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 George Bush Airport 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 George Bush Airport with another airline. Booking your flights between Houston George Bush Airport and ONT 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 Houston George Bush Airport 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 George Bush Airport 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 Houston George Bush Intcntl Airport to Ontario

  • Looking for a cheap flight? 25% of our users found flights on this route for $135 or less one-way and $238 or less round-trip.

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

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

Direct departures

Houston George Bush Intcntl to Ontario

Monday

Frontier,United Airlines

Frontier,United Airlines

Tuesday

Frontier,United Airlines

Frontier,United Airlines

Wednesday

Frontier,United Airlines

Frontier,United Airlines

Thursday

Frontier,United Airlines

Frontier,United Airlines

Friday

Frontier,United Airlines

Frontier,United Airlines

Saturday

Frontier,United Airlines

Frontier,United Airlines

Sunday

Frontier,United Airlines

Frontier,United Airlines

See more direct flights

Direct returns

Ontario to Houston George Bush Intcntl

Monday

Frontier,United Airlines

Frontier,United Airlines

Tuesday

Frontier,United Airlines

Frontier,United Airlines

Wednesday

Frontier,United Airlines

Frontier,United Airlines

Thursday

Frontier,United Airlines

Frontier,United Airlines

Friday

Frontier,United Airlines

Frontier,United Airlines

Saturday

Frontier,United Airlines

Frontier,United Airlines

Sunday

Frontier,United Airlines

Frontier,United Airlines

See more direct flights

Reviews of the top 3 airlines serving from George Bush Intcntl 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 George Bush Intcntl 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.
7.4
United AirlinesOverall score based on 9948 reviews
7.3Comfort
8.1Crew
7.1Entertainment
6.7Food
7.7Boarding
Airline reviews

Packed flight, which makes it tough on crew and boarding staff (and the customers of course). But this was great boarding, clear instructions, etc. Traveling on the weekends are always fraught with danger as you have families and less frequent flyers thus more confusion. But this flight went as planned.

10.0 ExcellentBill, Jun 2026
IAH - LAX
Read more United Airlines reviews

Packed flight, which makes it tough on crew and boarding staff (and the customers of course). But this was great boarding, clear instructions, etc. Traveling on the weekends are always fraught with danger as you have families and less frequent flyers thus more confusion. But this flight went as planned.

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

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.

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

Plane was crowded and even when we hit altitude, the plane was hot, not enough air flow.

I was refused to used the toilet closes to my seat and had to go to the back of the plane .. it was difficult for me I’m a wheelchair customer

Crew was very cooperative and professional. Passenger's first checked in bag should be free.

Over two hours wait to get wheelchair assistance from arrival to the departure gate for LA was unreasonable even though there appreared to be heavy demand.

The crew was nice but the people going to Orange County are so entitled. Everyone thinks everything is suppose for be perfect for them. Tough crowd.

Flight was absolutely sold out, so that just makes the crews job that much tougher. I will say people (customers) are behaving better over the last year.

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

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

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

They changed my seat from one that I had paid for as an upgrade to a regular seat at the last minute.

Very aggressive and unhelpful ground crew. Wanted to check my hand luggage for 3 flights. I had lots of delicate items and computer equipment. So the silly lady wanted to rebook 3 international flights because of a carry on. What nonsense. The baggage handler suggested I put it under my seat - so I did. And this was during the rebooking chaos of the Microsoft crash. She was the most arrogant annoying and aggressive ground staff member I’ve met in 20yrs. (AA flight out of Houston).

Everything was great except for the wifi was junk. Crew was super friendly and helpful

Was as expected. Good leg room on planes - much appreciated.

I know that there is nothing than can be done about rude customers. I did find a couple of them were very rude and inconsiderate In my case the guy who was sitting in the same row as I was in, was trying to watch a movie with no headphones, a crew member did ask him to turn it down or off (thumbs up for that.) Another thing, as we were about to land another young man must have taken his phone off airplane mode was talking with his friends and using fowl language which I found inappropriate to the ppl who were sitting in the same row as him and other ppl around him. I understand how no one wanted to address this person and not get involved. We all just wanted to get home safely with out any incident.

The food service was limited and not good. For a seven hour flight they could do better.

It was fine. I didn't love the food but it was at least a real attempt at serving a meal, unlike my earlier flight from Nashville to Dallas.

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

The reps working at the airport counter were dumber than a second coat of paint.

Delayed each time on a round trip with no significant weather interference. Updates to flight times came after the fact. 30 min behind in boarding and board and phone still show an on time departure. Some mysterious extra 300 miles that came so surprising they had to fuel while we were already on board?

Airline changed the gate from Terminal A to Terminal D which is quite far and only sent a text message few minutes before boarding. Around 50 people missed their flight and as plane didn’t wait for them.

Flight was cancelled and was not able to get another flight thru Frontier. Per frontier a refund was issued but I do not see a refund on my Afirm account.

Bad experience… crew are extremely strict with personal bags… they overcharge me coz my bag was one inch H

The agent at check-in was strident, unwelcoming, and condescending to customers ahead of me.

Was charged 99 dollars for a bag despite agents previously telling me it would be ok. Customer service was unhelpful

I will like you ( Frontier Airlines) to fly into LAX instead of ONT because I live in LA and the subway takes me to my house in just 15 minutes

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

Information on your arrival and departure airports