ONT - IAH

$40 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 2/2. 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
41,299,237 searches in the past 7 days on KAYAK

Save 23% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Everything you should know

Cheapest round-trip
$126
Overall average: $346
Frontier
Mon 2/2Tue 2/17
ONT - IAH • Non-stop
Cheapest non-stop
$128
Typical prices: $209-$503
Frontier
Fri 2/6Fri 2/20
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
Top airlines
Alaska Airlines
Cheapest • from $257 (round-trip)
United Airlines
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
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
When to travel
March
Cheapest • 23% price drop
April
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 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

Mon, Feb 2 - Tue, Feb 17
Frontier Logo
1:46 pm - 7:07 pm
ONT
-
IAH
3h 21mnonstop
Frontier Logo
6:45 am - 9:34 pm
IAH
-
ONT
16h 49m
1 stop
$126Frontier
Fri, Feb 6 - Fri, Feb 20
Frontier Logo
1:46 pm - 7:07 pm
ONT
-
IAH
3h 21mnonstop
Frontier Logo
10:31 am - 12:23 pm
IAH
-
ONT
3h 52mnonstop
$128Frontier
Fri, Feb 27 - Tue, Mar 3
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
$129Frontier
Mon, Feb 2 - Sat, Feb 7
Frontier Logo
1:46 pm - 7:07 pm
ONT
-
IAH
3h 21mnonstop
Frontier Logo
7:00 pm - 11:24 pm
IAH
-
ONT
6h 24m
1 stop
$130Frontier
Fri, Feb 13 - Mon, Feb 16
Frontier Logo
1:18 pm - 6:39 pm
ONT
-
IAH
3h 21mnonstop
Frontier Logo
10:31 am - 12:23 pm
IAH
-
ONT
3h 52mnonstop
$131Frontier
Wed, Feb 4 - Wed, Feb 18
Frontier Logo
7:15 am - 11:39 pm
ONT
-
IAH
14h 24m
1 stop
Frontier Logo
8:45 am - 9:34 am
IAH
-
ONT
26h 49m
1 stop
$132Frontier
Fri, Feb 13 - Mon, Feb 16
Frontier Logo
1:18 pm - 6:39 pm
ONT
-
IAH
3h 21mnonstop
Frontier Logo
10:31 am - 12:23 pm
IAH
-
ONT
3h 52mnonstop
$133Frontier
Wed, Feb 4 - Mon, Feb 16
Frontier Logo
7:15 am - 11:39 pm
ONT
-
IAH
14h 24m
1 stop
Frontier Logo
10:31 am - 12:23 pm
IAH
-
ONT
3h 52mnonstop
$134Frontier
Fri, Feb 6 - Wed, Feb 18
Frontier Logo
1:46 pm - 7:07 pm
ONT
-
IAH
3h 21mnonstop
Frontier Logo
8:45 am - 9:34 am
IAH
-
ONT
26h 49m
1 stop
$135Frontier
Fri, Feb 6 - Mon, Feb 9
Multiple Airlines Logo
8:48 pm - 5:55 am
ONT
-
IAH
7h 07m
1 stop
Multiple Airlines Logo
10:51 am - 12:43 pm
IAH
-
ONT
3h 52mnonstop
$136Multiple Airlines
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 Thursday, with Sunday 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 $188 (return) on average. On the other hand, the most expensive months are February and December, where the average cost of round-trip tickets is $346 and $316 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 31% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 11 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$40
Best time to beat the crowds but there is an average 10% increase in price.
Most popular time to fly and prices are also 22% lower on average.
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 $40 for a one-way ticket and $126 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 $382 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 $366 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 $183 or less one-way and $339 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

United Airlines

United Airlines

Thursday

United Airlines

United Airlines

Friday

Frontier, United Airlines

Frontier, United Airlines

Saturday

United Airlines

United Airlines

Sunday

United Airlines

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

United Airlines

United Airlines

Thursday

United Airlines

United Airlines

Friday

Frontier, United Airlines

Frontier, United Airlines

Saturday

United Airlines

United Airlines

Sunday

United Airlines

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 9168 reviews
7.1Entertainment
6.6Food
8.1Crew
7.7Boarding
7.3Comfort
Airline reviews

Delayed, toilets did not flush, pilot parked to far away from Gate

2.0 MediocreLisa, Jan 2026
ELP - IAH
Read more United Airlines reviews

Delayed, toilets did not flush, pilot parked to far away from Gate

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.

The seats from lax to DFW was so tight that I could not move my legs . No WiFi and had to pay . Not a good selection of entertainment

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.

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 George Bush Intcntl

Information on your arrival and departure airports