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$56+ Cheap flights from George Bush Intcntl (IAH) to Ontario (ONT)

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 10/2. Fares are subject to change and may not be available on all flights or dates of travel.
IAH — ONT
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheapflights Tip: The best prices from Houston George Bush Intcntl to Ontario are usually found in September or February, booked 84 days in advance, depart on a Thursday or Tuesday and return on a Friday

Cheap flight deals from George Bush Intcntl to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from George Bush Intcntl (IAH) to Ontario (ONT). 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 September 11, 2025.

Round-trip from

$120
(CheapOair)

One-way from

$56
(Cheapflightsfares)

Popular in

June

Cheapest in

September

Average price

$128

Good round-trip deal

$136 or less

Good one-way deal

$102 or less
From Houston George Bush Intcntl to Ontario
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One-way flight from Houston George Bush Intcntl to Ontario
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Highest demand for flights based on searches. 17% potential increase in price ($42 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($9 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Houston George Bush Intcntl to Ontario.
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Price to beat on a one-way flight from Houston George Bush Intcntl to Ontario.
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Find flight deals from George Bush Intcntl to Ontario

Cheapest flights from George Bush Intcntl to Ontario
Explore the most affordable flight options available from George Bush Intcntl to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.

This CheapOair deal was found by Cheapflights users on 9/10. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/25:07 pmIAH - ONT
Nonstop3h 28mFrontier
Tue 10/286:53 amONT - IAH
1 stop14h 46mFrontier
Deal found 9/10$124
This Gotogate deal was found by Cheapflights users on 9/11. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/25:07 pmIAH - ONT
Nonstop3h 28mFrontier
Wed 10/86:53 amONT - IAH
1 stop14h 43mFrontier
Deal found 9/11$125
This Cheapflightsfares deal was found by Cheapflights users on 9/9. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/35:07 pmIAH - ONT
Nonstop3h 28mFrontier
Sun 10/512:28 pmONT - IAH
Nonstop3h 19mFrontier
Deal found 9/9$132
This Cheapflightsfares deal was found by Cheapflights users on 9/10. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/25:07 pmIAH - ONT
Nonstop3h 28mFrontier
Sun 10/512:28 pmONT - IAH
Nonstop3h 19mFrontier
Deal found 9/10$133
This Frontier deal was found by Cheapflights users on 9/10. 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.
Sun 10/55:07 pmIAH - ONT
Nonstop3h 28mFrontier
Thu 10/912:32 pmONT - IAH
Nonstop3h 16mFrontier
Deal found 9/10$134
This Booking.com deal was found by Cheapflights users on 9/9. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/102:59 pmIAH - ONT
Nonstop3h 29mFrontier
Sun 10/1212:49 pmONT - IAH
Nonstop3h 16mFrontier
Deal found 9/9$135
This Frontier deal was found by Cheapflights users on 9/9. 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.
Sun 10/124:24 pmIAH - ONT
Nonstop3h 25mFrontier
Thu 10/1612:32 pmONT - IAH
Nonstop3h 16mFrontier
Deal found 9/9$136
This CheapOair deal was found by Cheapflights users on 9/11. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/247:30 amIAH - ONT
1 stop25h 53mFrontier
Thu 10/912:32 pmONT - IAH
Nonstop3h 16mFrontier
Deal found 9/11$137
This Kiwi.com deal was found by Cheapflights users on 9/10. 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 10/17:30 amIAH - ONT
1 stop14h 24mFrontier
Fri 10/1012:32 pmONT - IAH
Nonstop3h 16mFrontier
Deal found 9/10$138
This CheapOair deal was found by Cheapflights users on 9/8. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/76:00 amIAH - ONT
1 stop19h 50mFrontier
Sun 10/1212:49 pmONT - IAH
Nonstop3h 16mFrontier
Deal found 9/8$139
This CheapOair deal was found by Cheapflights users on 9/8. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/17:30 amIAH - ONT
1 stop25h 53mFrontier
Thu 10/212:28 pmONT - IAH
Nonstop3h 19mFrontier
Deal found 9/8$141

Cheapflights Fare Finder

 
Customize your flight search to find flights from George Bush Intcntl to Ontario 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 September 11, 2025.
Use the filters below to find and compare flights from Houston George Bush Intcntl Airport to Ontario that are best for you.

Fly from

George Bush Intcntl

Fly to

Ontario

Route

Depart

Return

Price

HoustonOntario

IAH - ONT

IAHONT

Houston George Bush Intcntl

Thu 9/25

5:07 pm-6:35 pm

Nonstop3h 28m

Ontario

Fri 9/26

12:28 pm-5:47 pm

Nonstop3h 19m

$223

HoustonOntario

IAH - ONT

IAHONT

Houston George Bush Intcntl

Tue 9/30

7:59 pm-9:24 pm

Nonstop3h 25m

Ontario

Tue 10/7

6:00 am-11:10 am

Nonstop3h 10m

$229

HoustonOntario

IAH - ONT

IAHONT

Houston George Bush Intcntl

Tue 10/14

7:59 pm-9:24 pm

Nonstop3h 25m

Ontario

Sat 10/18

6:00 am-11:10 am

Nonstop3h 10m

$229

HoustonOntario

IAH - ONT

IAHONT

Houston George Bush Intcntl

Sat 10/18

7:59 pm-9:24 pm

Nonstop3h 25m

Ontario

Sat 10/25

6:00 am-11:10 am

Nonstop3h 10m

$229

HoustonOntario

IAH - ONT

IAHONT

Houston George Bush Intcntl

Tue 9/30

7:59 pm-9:24 pm

Nonstop3h 25m

Ontario

Sat 10/11

6:00 am-11:10 am

Nonstop3h 10m

$229

HoustonOntario

IAH - ONT

IAHONT

Houston George Bush Intcntl

Sat 10/4

7:59 pm-9:24 pm

Nonstop3h 25m

Ontario

Tue 10/7

6:00 am-11:10 am

Nonstop3h 10m

$229

HoustonOntario

IAH - ONT

IAHONT

Houston George Bush Intcntl

Wed 10/1

7:59 pm-9:24 pm

Nonstop3h 25m

Ontario

Tue 10/7

6:00 am-11:10 am

Nonstop3h 10m

$229

HoustonOntario

IAH - ONT

IAHONT

Houston George Bush Intcntl

Tue 2/3

8:15 pm-9:58 pm

Nonstop3h 43m

Ontario

Sat 2/7

6:00 am-11:12 am

Nonstop3h 12m

$229

HoustonOntario

IAH - ONT

IAHONT

Houston George Bush Intcntl

Tue 9/30

5:45 am-10:42 am

1 stop6h 57m

Ontario

Tue 10/7

7:35 am-9:32 pm

2 stops11h 57m

$242

HoustonOntario

IAH - ONT

IAHONT

Houston George Bush Intcntl

Fri 10/3

7:59 pm-9:24 pm

Nonstop3h 25m

Ontario

Tue 10/7

6:00 am-11:10 am

Nonstop3h 10m

$245

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/11

Showing 1-10 of 24 results
1
2
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The best insider tips for Houston George Bush Intcntl Airport to Ontario flights

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
Cheapflights partnered with top experts to bring you the best recommendations for your Houston George Bush Intcntl Airport to Ontario trip
Airlines
Frontier

Frontier's UpFront Plus offers empty middle seats for added comfort on 3-hour flights.


Frontier's Zone 1 boarding available with carry-on purchase, ensuring early boarding.

Read more about Frontierby Marisa Garcia
United Airlines

United's Economy Plus offers extra legroom, ideal for comfort on 3-hour flights.


United's Basic Economy restricts carry-ons; consider this when booking for a 3-hour flight.

Read more about United Airlinesby Harriet Baskas
Airports
IAH

Check security wait times on the IAH website to plan your arrival and avoid delays.

Read more about IAHby Evie Carrick
ONT

Consider renting a car at ONT for easy access to Southern California destinations like Palm Springs.

Read more about ONTby Bill Fink
Our travel experts
Marisa Garcia

Marisa Garcia

Expert on Frontier

Marisa Garcia

Marisa Garcia

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 Baskas

Harriet Baskas

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

Evie Carrick

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 Fink

Bill Fink

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

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

Have a flexible travel schedule? Discover the best time to fly to Ontario from George Bush Intcntl 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 Houston George Bush Intcntl Airport to Ontario

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

Use this chart to determine the optimal time to book a round-trip flight from George Bush Intcntl to Ontario. Price data was last updated on August 29, 2025.

The best time to book flights from Houston George Bush Intcntl Airport to Ontario is 84 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 Houston George Bush Intcntl Airport to Ontario?

Currently, August is the cheapest month in which you can book a flight from Houston George Bush Intcntl Airport to Ontario (average of $246). Flying from Houston George Bush Intcntl Airport to Ontario in March is currently the most expensive (average of $328). 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 IAH to ONT?

Find hourly flight availability from George Bush Intcntl to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 11, 2025.

A simple way to save on the total cost of your ticket is to fly from Houston George Bush Intcntl Airport to Ontario in the morning. If you’re flexible enough to do this you can expect to save up to 30% on your trip compared to booking a flight in the evening.

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

Use this chart to determine the cheapest time to fly round-trip from George Bush Intcntl to Ontario. Price data was last updated on September 7, 2025.

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

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. 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 Ontario. Reviews last updated September 11, 2025.
Peruse reviews from past customers who have flown with United Airlines, American Airlines, and Spirit Airlines from Houston George Bush Intcntl Airport to Ontario to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,937 reviews

Entertainment

7.1

Boarding

7.7

Comfort

7.3

Crew

8.1

Overall

7.4

Food

6.6

Reviews

1 / 20
8.0
Excellent

Mignon,Nov 2024

IAH - LGA

Good boarding process. (Nice to be able to buy Group 2 boarding option.) Plane was clean. Tried to avoid full flight by flying on Saturday, but plane was full anyway. Gate area in Houston should have charging options. Should be a lounge for people with American Express Platinum Card in Houston Airport.
United Airlines
7.4
Good
8,937 reviews
United Airlines
7.4
Good
8,937 reviews

Entertainment

7.1

Boarding

7.7

Comfort

7.3

Crew

8.1

Overall

7.4

Food

6.6

Reviews

1 / 20
8.0
Excellent

Mignon,Nov 2024

IAH - LGA

Good boarding process. (Nice to be able to buy Group 2 boarding option.) Plane was clean. Tried to avoid full flight by flying on Saturday, but plane was full anyway. Gate area in Houston should have charging options. Should be a lounge for people with American Express Platinum Card in Houston Airport.
American Airlines
7.2
Good
10,000 reviews
United Airlines
7.4
Good
8,937 reviews

Entertainment

7.1

Boarding

7.7

Comfort

7.3

Crew

8.1

Overall

7.4

Food

6.6

Reviews

1 / 20
8.0
Excellent

Mignon,Nov 2024

IAH - LGA

Good boarding process. (Nice to be able to buy Group 2 boarding option.) Plane was clean. Tried to avoid full flight by flying on Saturday, but plane was full anyway. Gate area in Houston should have charging options. Should be a lounge for people with American Express Platinum Card in Houston Airport.
Spirit Airlines
6.3
Okay
8,023 reviews
United Airlines
7.4
Good
8,937 reviews

Entertainment

7.1

Boarding

7.7

Comfort

7.3

Crew

8.1

Overall

7.4

Food

6.6

Reviews

1 / 20
8.0
Excellent

Mignon,Nov 2024

IAH - LGA

Good boarding process. (Nice to be able to buy Group 2 boarding option.) Plane was clean. Tried to avoid full flight by flying on Saturday, but plane was full anyway. Gate area in Houston should have charging options. Should be a lounge for people with American Express Platinum Card in Houston Airport.
Frontier
5.8
Fair
3,177 reviews
United Airlines
7.4
Good
8,937 reviews

Entertainment

7.1

Boarding

7.7

Comfort

7.3

Crew

8.1

Overall

7.4

Food

6.6

Reviews

1 / 20
8.0
Excellent

Mignon,Nov 2024

IAH - LGA

Good boarding process. (Nice to be able to buy Group 2 boarding option.) Plane was clean. Tried to avoid full flight by flying on Saturday, but plane was full anyway. Gate area in Houston should have charging options. Should be a lounge for people with American Express Platinum Card in Houston Airport.

Related info for your journey

Find useful and relevant information for your journey from George Bush Intcntl to Ontario. 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 into for flights to Ontario from Houston George Bush Intcntl?

    Most people fly into Ontario (ONT) if they book a flight to Ontario from Houston George Bush Intcntl. On average, Ontario has 2 inbound flights from Houston George Bush Intcntl per day from 4 airlines. Ontario is conveniently located just 3.1 mi from Ontario’s city center.

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

    There are many flights that can get you from Houston George Bush Intcntl Airport to Ontario in 3h 25m. Fly via Frontier or United Airlines to get the fastest option. The distance from Houston George Bush Intcntl Airport to Ontario is about 1330 mi. All flights are typically nonstop.

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

    Our cheapest airline available from Houston George Bush Intcntl Airport to Ontario is Frontier. Our recent data shows that you can find tickets from as low as $85 on this airline. Additional options worth looking into are Spirit Airlines and United Airlines, starting at $123 and $148 round-trip. You may be able to fly from Houston George Bush Intcntl Airport to Ontario for 58% less than the average price by searching for these airlines.

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

    The cheapest airline one-way is Frontier, with whom users have recently found tickets for as low as $56. However, be on the lookout for offers from United Airlines and Alaska Airlines, as they are both options that can get you from Houston George Bush Intcntl Airport to Ontario for a low price.

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

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Houston George Bush Intcntl Airport to Ontario on time: United Airlines (80%), Lufthansa (67%), Frontier (31%).

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

    While on average a flight from Houston George Bush Intcntl Airport to Ontario is generally $159, our data shows the cheapest flight currently is $61. When looking at the most popular route, (Houston George Bush Intcntl - Ontario), you can expect to pay $105 for that flight.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from George Bush Intcntl to Ontario 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 Houston George Bush Intcntl Airport to Ontario?

    Currently, August is the cheapest month in which you can book a flight from Houston George Bush Intcntl Airport to Ontario (average of $246). Flying from Houston George Bush Intcntl Airport to Ontario in March is currently the most expensive (average of $328). 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

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Top 4 airlines flying from George Bush Intcntl to Ontario

Discover the top 4 airlines that operate flights from George Bush Intcntl to Ontario. 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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$85Average$175FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$123Average$243FlexibilityNo cancel feeOn-time65%
United AirlinesCheapest$148Average$396FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$236Average$369FlexibilityNo cancel feeOn-time71%

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