HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
George Bush Intcntl

$73+ Cheap flights from Ontario (ONT) to George Bush Intcntl (IAH)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/10. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — IAH
Aug 26 — Sep 21
Wed 8/26
Wed 9/2
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Ontario to George Bush Intcntl with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.
Cheapflights Tip: The best prices from Ontario to Houston George Bush Intcntl are usually found in August or October, booked 71 days in advance, depart on a Friday or Thursday and return on a Friday

Cheap flight deals from Ontario to George Bush Intcntl

Cheapest flights from Ontario to George Bush Intcntl
Explore the most affordable flight options available from Ontario to George Bush Intcntl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 27, 2026.

This Kiwi.com deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/123:47 pm
ONT
-
IAH
Nonstop3h 23m
Frontier
Tue 11/176:30 am
IAH
-
ONT
1 stop9h 10m
Frontier
Deal found 7/24$162
This Kiwi.com deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/39:33 am
ONT
-
IAH
Nonstop3h 20m
Frontier
Wed 9/96:25 am
IAH
-
ONT
1 stop19h 22m
Frontier
Deal found 7/27$163
This Kiwi.com deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/179:36 am
ONT
-
IAH
Nonstop3h 20m
Frontier
Mon 8/176:14 pm
IAH
-
ONT
1 stop7h 36m
Frontier
Deal found 7/24$164
This Frontier deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/39:33 am
ONT
-
IAH
Nonstop3h 20m
Frontier
Sun 9/66:10 am
IAH
-
ONT
Nonstop3h 22m
Frontier
Deal found 7/25$165
This Kiwi.com deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/126:15 am
ONT
-
IAH
1 stop10h 48m
Frontier
Mon 11/161:05 pm
IAH
-
ONT
Nonstop3h 32m
Frontier
Deal found 7/24$167
This Kiwi.com deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/246:00 am
ONT
-
IAH
1 stop13h 19m
Frontier
Wed 8/2611:35 am
IAH
-
ONT
1 stop14h 15m
Frontier
Deal found 7/26$168
This Kiwi.com deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/116:15 am
ONT
-
IAH
1 stop10h 48m
Frontier
Tue 11/176:30 am
IAH
-
ONT
1 stop9h 10m
Frontier
Deal found 7/26$170
This Super.com deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/219:33 am
ONT
-
IAH
Nonstop3h 20m
Frontier
Tue 8/255:38 pm
IAH
-
ONT
Nonstop3h 23m
Frontier
Deal found 7/22$172
This Kiwi.com deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/159:36 am
ONT
-
IAH
Nonstop3h 20m
Frontier
Sat 8/156:14 pm
IAH
-
ONT
1 stop7h 36m
Frontier
Deal found 7/24$173
This Kiwi.com deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/123:47 pm
ONT
-
IAH
Nonstop3h 23m
Frontier
Sat 11/146:30 am
IAH
-
ONT
1 stop9h 10m
Frontier
Deal found 7/26$174
This Frontier deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/139:36 am
ONT
-
IAH
Nonstop3h 20m
Frontier
Mon 8/176:10 am
IAH
-
ONT
Nonstop3h 22m
Frontier
Deal found 7/25$175
This Frontier deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/123:47 pm
ONT
-
IAH
Nonstop3h 23m
Frontier
Thu 11/191:05 pm
IAH
-
ONT
Nonstop3h 32m
Frontier
Deal found 7/24$176

Find flight deals from Ontario to George Bush Intcntl

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to George Bush Intcntl (IAH). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated July 27, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$162
(Kiwi.com)

One-way from

$73
(Kiwi.com)

Popular in

March

Cheapest in

August

Average price

$338

Good round-trip deal

$274 or less

Good one-way deal

$183 or less
Provider with most accurate pricing for Ontario-Houston George Bush Intcntl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Ontario-Houston George Bush Intcntl flights.
Search Deals
From Ontario to Houston George Bush Intcntl
Search Deals
One-way flight from Ontario to Houston George Bush Intcntl
Search Deals
Highest demand for flights based on searches. 16% potential increase in price ($59 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($11 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals
Price to beat on a round-trip flight from Ontario to Houston George Bush Intcntl.
Search Deals
Price to beat on a one-way flight from Ontario to Houston George Bush Intcntl.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to George Bush Intcntl that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 27, 2026.
Use the filters below to find and compare flights from Ontario to Houston George Bush Intcntl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioHouston

ONT - IAH

ONTIAH

Ontario

Tue 11/3

6:00 am-11:10 am

Nonstop3h 10m

Houston George Bush Intcntl

Tue 11/10

5:20 pm-10:53 pm

1 stop7h 33m

$215

OntarioHouston

ONT - IAH

ONTIAH

Ontario

Wed 8/26

9:43 am-6:02 pm

1 stop6h 19m

Houston George Bush Intcntl

Wed 9/9

7:00 am-4:35 pm

2 stops11h 35m

$230

OntarioHouston

ONT - IAH

ONTIAH

Ontario

Mon 8/17

10:00 pm-8:37 am

1 stop8h 37m

Houston George Bush Intcntl

Wed 8/19

3:15 pm-11:34 pm

2 stops10h 19m

$232

OntarioHouston

ONT - IAH

ONTIAH

Ontario

Mon 9/28

9:52 am-6:06 pm

1 stop6h 14m

Houston George Bush Intcntl

Mon 10/5

7:06 pm-11:47 pm

1 stop6h 41m

$235

OntarioHouston

ONT - IAH

ONTIAH

Ontario

Sat 8/22

12:00 pm-11:52 pm

1 stop9h 52m

Houston George Bush Intcntl

Tue 8/25

4:14 pm-11:34 pm

2 stops9h 20m

$240

OntarioHouston

ONT - IAH

ONTIAH

Ontario

Sat 11/7

1:24 pm-9:58 pm

1 stop6h 34m

Houston George Bush Intcntl

Wed 12/16

7:41 pm-11:58 pm

1 stop6h 17m

$255

OntarioHouston

ONT - IAH

ONTIAH

Ontario

Thu 9/10

1:04 pm-9:57 pm

1 stop6h 53m

Houston George Bush Intcntl

Wed 9/16

7:06 pm-11:47 pm

1 stop6h 41m

$255
Quickest round-trip

OntarioHouston

ONT - IAH

ONTIAH

Ontario

Thu 12/3

6:00 am-11:10 am

Nonstop3h 10m

Houston George Bush Intcntl

Wed 12/9

8:00 pm-9:21 pm

Nonstop3h 21m

$325

OntarioHouston

ONT - IAH

ONTIAH

Ontario

Sat 10/17

6:00 am-11:15 am

Nonstop3h 15m

Houston George Bush Intcntl

Mon 10/19

8:30 pm-9:59 pm

Nonstop3h 29m

$325

OntarioHouston

ONT - IAH

ONTIAH

Ontario

Thu 8/20

6:20 am-9:50 pm

2 stops13h 30m

Houston George Bush Intcntl

Sat 8/22

7:20 am-4:24 pm

2 stops11h 04m

$356

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/23

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

Compare providers for flights from Ontario to George Bush Intcntl

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ontario to George Bush Intcntl in July.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
JustAirTicketPrice Accuracy-Trust Score*1 star
Kiwi.comPrice Accuracy3 starsTrust Score*3 stars
CheapOairPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars
CheapfaremartPrice Accuracy-Trust Score*1 star

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Ontario-Houston George Bush Intcntl Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-Houston George Bush Intcntl Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ontario-Houston George Bush Intcntl Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Ontario-Houston George Bush Intcntl Airport flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ontario-Houston George Bush Intcntl Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Ontario to George Bush Intcntl

Have a flexible travel schedule? Discover the best time to fly to George Bush Intcntl from Ontario with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Ontario to Houston George Bush Intcntl Airport

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

The best time to book flights from Ontario to Houston George Bush Intcntl Airport is 70 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Ontario to Houston George Bush Intcntl Airport?

Currently, August is the cheapest month in which you can book a flight from Ontario to Houston George Bush Intcntl Airport (average of $196). Flying from Ontario to Houston George Bush Intcntl Airport in March is currently the most expensive (average of $408). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ONT to IAH?

Find hourly flight availability from Ontario to George Bush Intcntl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 27, 2026.

When flying from Ontario to Houston George Bush Intcntl Airport, the time of day you fly usually plays a role in the price. Save by searching for a flight at noon, which can drop the price by up to 51% versus a flight in the morning.

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

Use this chart to determine the cheapest time to fly round-trip from Ontario to George Bush Intcntl. Price data was last updated on July 25, 2026.

Travelers seeking maximum savings on their Ontario to Houston George Bush Intcntl Airport flight should consider departing on Saturday evenings when fares are most often at their lowest. Sunday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

How much does it cost to fly round-trip from Ontario to Houston George Bush Intcntl Airport?

Airfare is below average for this route at the moment.

Ontario to Houston George Bush Intcntl Airport flights typically cost between $167 and $281 in November.
The cheapest round-trip price found within the last 5 days was $162 on Frontier (Nov 12-Nov 17).

The best insider tips for Ontario to Houston George Bush Intcntl Airport flights

AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your Ontario to Houston George Bush Intcntl Airport trip
Our travel experts
Marisa Garcia

Marisa Garcia

Expert on Frontier

Marisa knows planes inside and out, spending 16 years working on aircraft in hangars at airports around the world. She is an aviation industry expert, specialized in airline interiors and regulations. Ten years ago, she pivoted to journalism. She shares her insights in leading aviation, travel, and business publications and on her site FlightChic.

Read more
Harriet Baskas

Harriet Baskas

Expert on United Airlines

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Read more
Evie Carrick

Evie Carrick

Expert on IAH

Evie Carrick is a writer and editor who has lived in five countries and traveled to over 50, with extensive experience flying around the world. She was born in Colorado, but has spent time flying to both coasts to visit family. She writes regularly for Travel + Leisure, BuzzFeed, and SKI and recently published seven travel journals with Simon & Schuster.

Read more
Bill Fink

Bill Fink

Expert on ONT

Bill is an award-winning travel writer with extensive credits covering airlines and the aviation industry for publications including AARP, AFAR, The Points Guy and Yahoo. Based in Portland, Oregon, Bill has traveled to more than 75 countries - and been late for his flight in most of them. He once achieved top-level frequent flier status for all of American, Delta and United Airlines during a single year.

Read more

Reviews of airlines servicing George Bush Intcntl

Get insights into the airlines that provide service to George Bush Intcntl. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to George Bush Intcntl. Reviews last updated July 27, 2026.
Read through reviews of airlines operating flights from Ontario to Houston George Bush Intcntl Airport, such as United Airlines,American Airlines, andFrontier. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
10,042 reviews

Overall

7.4

Entertainment

7.1

Boarding

7.7

Comfort

7.3

Crew

8.1

Food

6.6

Reviews

1 / 20
8.0
Excellent

FERNANDO,Sep 2024

YYC - IAH

Everything was good, maybe can give better foof flys more than 4 hours
United Airlines
7.4
Good
10,042 reviews
United Airlines
7.4
Good
10,042 reviews

Overall

7.4

Entertainment

7.1

Boarding

7.7

Comfort

7.3

Crew

8.1

Food

6.6

Reviews

1 / 20
8.0
Excellent

FERNANDO,Sep 2024

YYC - IAH

Everything was good, maybe can give better foof flys more than 4 hours
American Airlines
7.1
Good
11,842 reviews
United Airlines
7.4
Good
10,042 reviews

Overall

7.4

Entertainment

7.1

Boarding

7.7

Comfort

7.3

Crew

8.1

Food

6.6

Reviews

1 / 20
8.0
Excellent

FERNANDO,Sep 2024

YYC - IAH

Everything was good, maybe can give better foof flys more than 4 hours
Frontier
5.6
Fair
2,755 reviews
United Airlines
7.4
Good
10,042 reviews

Overall

7.4

Entertainment

7.1

Boarding

7.7

Comfort

7.3

Crew

8.1

Food

6.6

Reviews

1 / 20
8.0
Excellent

FERNANDO,Sep 2024

YYC - IAH

Everything was good, maybe can give better foof flys more than 4 hours

Related info for your journey

Find useful and relevant information for your journey from Ontario to George Bush Intcntl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Ontario to Houston George Bush Intcntl?

    Located just 3.1 mi from the city center, Ontario is the airport most travelers will use when flying to Houston George Bush Intcntl from Ontario. Booking flights from Ontario (ONT) to Houston George Bush Intcntl should be relatively easy as there are 2 daily outbound flights to Houston George Bush Intcntl from 3 different airlines.

  • How long is the flight from Ontario to Houston George Bush Intcntl Airport?

    Departing from Ontario to Houston George Bush Intcntl Airport will take you 3h 10m. The distance from Ontario to Houston George Bush Intcntl Airport is about 1330 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines flying from Ontario to Houston George Bush Intcntl Airport round-trip?

    Cheapflights users have booked flights from Ontario to Houston George Bush Intcntl Airport round-trip from $100. Other airlines that can offer you cheap pricing are United Airlines, from $221, and American Airlines, from $268. Users have found that Frontier is 66% cheaper than the other options available to this destination.

  • What are the cheapest airlines to fly from Ontario to Houston George Bush Intcntl Airport one-way?

    The cheapest airlines for a one-way flight from Ontario to Houston George Bush Intcntl Airport are Frontier ($49), United Airlines ($72), and American Airlines ($125).

  • What are the most reliable airlines from Ontario to Houston George Bush Intcntl Airport?

    The top 3 most reliable airlines when flying from Ontario to Houston George Bush Intcntl Airport are United Airlines (92%), Frontier (69%) and Volaris (69%).

  • What are the cheapest flights from Ontario to Houston George Bush Intcntl Airport?

    Looking at all options, your cheapest flight can be booked for $73. While the most popular route (Ontario - Houston George Bush Intcntl) can be booked for $160 on average, our data indicates $493 when flying from Ontario to Houston George Bush Intcntl Airport.

  • Can I find deals for flights from Ontario to George Bush Intcntl that include hotel bookings?

    Yes. In addition to deals on Ontario to George Bush Intcntl flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to George Bush Intcntl?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to George Bush Intcntl.

  • Can I find deals for business class flights from Ontario to George Bush Intcntl?

    Yes. Cheapflights offers flight deals from Ontario to George Bush Intcntl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

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

    Currently, August is the cheapest month in which you can book a flight from Ontario to Houston George Bush Intcntl Airport (average of $196). Flying from Ontario to Houston George Bush Intcntl Airport in March is currently the most expensive (average of $408). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Houston George Bush Intcntl Airport?

Book flights to Houston George Bush Intcntl Airport if you plan to visit one of these locations
Katy
The Woodlands
Spring
Conroe
Jersey Village
Humble
Tomball
Cypress
Montgomery

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 3 airlines flying from Ontario to George Bush Intcntl

Discover the top 3 airlines that operate flights from Ontario to George Bush Intcntl. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 27, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$100Average$228FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$221Average$392FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$268Average$424FlexibilityNo cancel feeOn-time71%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.