IAH - ONT

$48 Find Cheap Flights from Houston George Bush Airport to Ontario

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 5/17. 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
$97
Typical prices: $257-$159
Frontier
Fri 5/8Sun 5/10
IAH - ONT • Non-stop
Cheapest one-way
$48
Typical prices: $88-$212
Frontier
Sun 5/17
IAH - ONT • Non-stop
Advice from real travelers
AI-powered summary based on content written by travel experts. AI can make mistakes.
Frontier's Economy Bundle includes a carry-on and seat.
IAH offers free Wi-Fi throughout all terminals.
Expert advice
Expert advice
Expert advice
Expert advice
Nonstop flights
You can fly direct with Frontier and United Airlines. Average duration is 3h 37m
Direct flights
Direct flights
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Direct flights
Direct flights
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When to book
in advance
Our data shows that travelers who book at least 2 weeks in advance save around 36% compared to booking last minute.
Insights
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Insights
When to travel
Cheapest • 41% price drop
Most popular
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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

Fri, May 8 - Sun, May 10
Frontier Logo
6:00 am - 7:35 am
IAH
-
ONT
3h 35mnonstop
Frontier Logo
8:06 pm - 1:25 am
ONT
-
IAH
3h 19mnonstop
$97Frontier
Fri, May 1 - Mon, May 4
Frontier Logo
3:01 pm - 4:38 pm
IAH
-
ONT
3h 37mnonstop
Frontier Logo
8:26 am - 1:46 pm
ONT
-
IAH
3h 20mnonstop
$98Frontier
Thu, May 7 - Wed, May 13
Frontier Logo
6:00 am - 7:35 am
IAH
-
ONT
3h 35mnonstop
Frontier Logo
8:06 pm - 1:25 am
ONT
-
IAH
3h 19mnonstop
$99Frontier
Fri, May 1 - Mon, May 18
Frontier Logo
3:01 pm - 4:38 pm
IAH
-
ONT
3h 37mnonstop
Frontier Logo
8:06 pm - 1:25 am
ONT
-
IAH
3h 19mnonstop
$102Frontier
Sun, May 10 - Wed, May 13
Frontier Logo
6:00 am - 7:35 am
IAH
-
ONT
3h 35mnonstop
Frontier Logo
8:06 pm - 1:25 am
ONT
-
IAH
3h 19mnonstop
$106Frontier
Fri, Jun 19 - Tue, Jun 23
Frontier Logo
4:21 pm - 5:52 pm
IAH
-
ONT
3h 31mnonstop
Frontier Logo
5:43 pm - 11:08 pm
ONT
-
IAH
3h 25mnonstop
$117Frontier
Tue, May 12 - Fri, May 15
Frontier Logo
5:40 pm - 10:05 am
IAH
-
ONT
18h 25m
1 stop
Frontier Logo
8:06 pm - 1:25 am
ONT
-
IAH
3h 19mnonstop
$118Frontier
Wed, May 6 - Tue, May 12
Frontier Logo
6:00 am - 7:35 am
IAH
-
ONT
3h 35mnonstop
Frontier Logo
4:39 pm - 12:33 pm
ONT
-
IAH
17h 54m
1 stop
$122Frontier
Wed, May 20 - Mon, Jun 1
Frontier Logo
6:00 am - 7:35 am
IAH
-
ONT
3h 35mnonstop
Frontier Logo
8:06 pm - 1:25 am
ONT
-
IAH
3h 19mnonstop
$123Frontier
Thu, May 7 - Sat, May 9
Frontier Logo
6:00 am - 7:35 am
IAH
-
ONT
3h 35mnonstop
Frontier Logo
6:00 am - 12:44 am
ONT
-
IAH
16h 44m
1 stop
$125Frontier
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 May.

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 Thursday and avoid Tuesdays 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 December and March, where the average cost of round-trip tickets is $330 and $283 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 2 weeks before departure, which saves you about 36% 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 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$48
Best time to beat the crowds with an average 26% drop in price.
Most popular time to fly and prices are also 42% lower on average.
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 3 days, the lowest price for a flight from Houston George Bush Intcntl Airport to Ontario was $48 for a one-way ticket and $97 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 $405 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 $386 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 $100 or less one-way and $166 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 9613 reviews
6.6Food
8.1Crew
7.1Entertainment
7.7Boarding
7.3Comfort
Airline reviews

It's a long flight and I would have liked better snacks between lunch and the arrival meal. It's fine to have fruit and nuts but I really don't like ramen because it's salty junk soup. I'd suggest sandwiches. They're not expensive nor are they hard to store for a long flight. The FA's had a couple of big services and they were super busy preparing, executing and then cleaning up. Then they disappeared.

8.0 ExcellentJesse, Apr 2026
IAH - NRT
Read more United Airlines reviews

It's a long flight and I would have liked better snacks between lunch and the arrival meal. It's fine to have fruit and nuts but I really don't like ramen because it's salty junk soup. I'd suggest sandwiches. They're not expensive nor are they hard to store for a long flight. The FA's had a couple of big services and they were super busy preparing, executing and then cleaning up. Then they disappeared.

Great flight. Got to watch a movie. Smooth flight and early arrival at ORD.

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.

Flight: Started on time. Comfortable flight. Arrived on time. Crew: Very cordial and helpful. Drinks and snack was served with a smile. Overall enjoyed the trip. Regards, Hari Doss Chanchala Doss

To have arrived on time and not 3 hours late after having already spent $100 to change to an earlier flight, only to arrive back home close to the original flight time.

American Airlines is a miserable experience. It is predictably miserable, in the sense that every time I fly American, I brace myself for the certainty that it will be unpleasant and uncomfortable. But it is unpredictable in the sense that I never know if the flight will be on time or delayed nine hours (both happened to me this week). I never know if I will be able to sit in the seat that I selected when I purchased the ticket or if I will be told by Customer Service (!!!) that I must relocate from first class to a seat in the back of the aircraft with no explanation (both happened to me this week). Will the food be frozen and half defrosted, or scalding hot? Will the drinks be warm? Will the flight attendants be surly and mean? Will the toilets be cramped and foul? Will the seats be narrow and uncomfortable? Will there be a real electric outlet at the seat, or just an unreliable USB-2 port? Will there be enough seats in the boarding lounge or just a few? Will the boarding process be smooth and efficient, or will the gate agents mess it up and delay it needlessly for 30 or 40 minutes? Will the catering and cleaning crew be prompt or will they take an extra 30 minutes? Will the brakes on the aircraft work properly, or will the pilot delay takeoff for four hours while the ground crew attends to what can only be described as routine maintenance that should have been done the night before? I've eexperienced every one of these unpleasant things this year, 2026. The only thing I can reliably count on is that American will find a new way to make the experience of flying as miserable as they possibly can.

Wifi was spotty. Tray table was very dirty when I sat down.

The WiFi would not connect enough for me to do my actual work. It permaspooled, disconnected, said it was connected, then wouldn't open an email... it was frustrating. I am not a tall person, 5'4" - and I felt cramped with little room to reach into my bag under the seat in front of me. I feel sorry for anyone taller than me having to fly. the one positive thing I will add, is the overhead bins are roomy enough to manage more bags than other carriers.

Going non stop to lax like I paid for. Not stopping in MCI for gas. Too long of delays

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.

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 George Bush Intcntl to Ontario

Information on your arrival and departure airports