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$89+ 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 4/6. Fares are subject to change and may not be available on all flights or dates of travel.
IAH — ONT
Apr 21 — Apr 281
Tue 4/21
Tue 4/28
1 adult, Economy
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Find cheap flights from George Bush Intcntl to Ontario with Cheapflights

1. Tell us where you want to go

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Cheapflights Tip: The best prices from Houston George Bush Intcntl to Ontario are usually found in November or September, booked 31 days in advance, depart on a Thursday or Tuesday and return on a Friday

Cheap 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 March 22, 2026.

This Frontier deal was found by Cheapflights users on 3/20. 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.
Wed 5/65:40 pm
IAH
-
ONT
1 stop8h 09m
Frontier
Thu 5/78:06 pm
ONT
-
IAH
Nonstop3h 19m
Frontier
Deal found 3/20$124
This Frontier deal was found by Cheapflights users on 3/19. 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.
Sat 5/96:45 am
IAH
-
ONT
Nonstop3h 35m
Frontier
Sat 5/95:59 pm
ONT
-
IAH
Nonstop3h 20m
Frontier
Deal found 3/19$128
This Booking.com deal was found by Cheapflights users on 3/19. 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.
Wed 5/66:00 am
IAH
-
ONT
Nonstop3h 35m
Frontier
Tue 5/128:06 pm
ONT
-
IAH
Nonstop3h 19m
Frontier
Deal found 3/19$129
This Frontier deal was found by Cheapflights users on 3/18. 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.
Fri 4/243:01 pm
IAH
-
ONT
Nonstop3h 37m
Frontier
Fri 4/2412:59 am
ONT
-
IAH
1 stop8h 43m
Frontier
Deal found 3/18$130
This Frontier deal was found by Cheapflights users on 3/18. 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.
Wed 4/223:32 pm
IAH
-
ONT
1 stop10h 23m
Frontier
Thu 4/238:26 am
ONT
-
IAH
Nonstop3h 20m
Frontier
Deal found 3/18$134
This Trip.com deal was found by Cheapflights users on 3/20. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/56:00 am
IAH
-
ONT
Nonstop3h 35m
Frontier
Sat 5/95:59 pm
ONT
-
IAH
Nonstop3h 20m
Frontier
Deal found 3/20$140
This CheapOair deal was found by Cheapflights users on 3/17. 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.
Sat 4/257:15 am
IAH
-
ONT
1 stop18h 40m
Frontier
Sun 4/268:21 am
ONT
-
IAH
Nonstop3h 20m
Frontier
Deal found 3/17$141
This Frontier deal was found by Cheapflights users on 3/20. 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.
Wed 4/2910:30 am
IAH
-
ONT
1 stop10h 19m
Frontier
Wed 5/68:06 pm
ONT
-
IAH
Nonstop3h 19m
Frontier
Deal found 3/20$144
This Booking.com deal was found by Cheapflights users on 3/21. 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.
Tue 5/51:28 pm
IAH
-
ONT
1 stop8h 04m
Frontier
Tue 5/128:06 pm
ONT
-
IAH
Nonstop3h 19m
Frontier
Deal found 3/21$145
This Super.com deal was found by Cheapflights users on 3/21. 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.
Wed 5/136:00 am
IAH
-
ONT
Nonstop3h 35m
Frontier
Wed 5/208:06 pm
ONT
-
IAH
Nonstop3h 19m
Frontier
Deal found 3/21$146
This Kiwi.com deal was found by Cheapflights users on 3/18. 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.
Sun 5/106:00 am
IAH
-
ONT
Nonstop3h 35m
Frontier
Sat 5/165:59 pm
ONT
-
IAH
Nonstop3h 20m
Frontier
Deal found 3/18$147
This Frontier deal was found by Cheapflights users on 3/20. 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.
Tue 5/126:00 am
IAH
-
ONT
Nonstop3h 35m
Frontier
Fri 5/158:06 pm
ONT
-
IAH
Nonstop3h 19m
Frontier
Deal found 3/20$148

Find 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 March 22, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$124
(Frontier)

One-way from

$89
(Kiwi.com)

Popular in

December

Cheapest in

November

Average price

$244

Good round-trip deal

$206 or less

Good one-way deal

$108 or less
Provider with most accurate pricing for Houston George Bush Intcntl-Ontario flight deals.
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Provider most trusted by Cheapflights users for Houston George Bush Intcntl-Ontario flights.
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From Houston George Bush Intcntl to Ontario
Search Deals
One-way flight from Houston George Bush Intcntl to Ontario
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($20 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($10 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals
Price to beat on a round-trip flight from Houston George Bush Intcntl to Ontario.
Search Deals
Price to beat on a one-way flight from Houston George Bush Intcntl to Ontario.
Search Deals

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 March 22, 2026.
Use the filters below to find and compare flights from Houston George Bush Intcntl Airport to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

HoustonOntario

IAH - ONT

IAHONT

Houston George Bush Intcntl

Mon 4/20

4:00 pm-11:44 pm

2 stops9h 44m

Ontario

Tue 4/21

10:15 pm-8:42 am

1 stop8h 27m

$302
Quickest round-trip

HoustonOntario

IAH - ONT

IAHONT

Houston George Bush Intcntl

Wed 4/15

8:14 pm-9:50 pm

Nonstop3h 36m

Ontario

Sat 4/18

6:05 am-11:15 am

Nonstop3h 10m

$347

HoustonOntario

IAH - ONT

IAHONT

Houston George Bush Intcntl

Sat 5/2

8:22 pm-9:58 pm

Nonstop3h 36m

Ontario

Sun 5/3

6:00 am-11:11 am

Nonstop3h 11m

$357

HoustonOntario

IAH - ONT

IAHONT

Houston George Bush Intcntl

Sat 4/25

8:14 pm-9:50 pm

Nonstop3h 36m

Ontario

Sun 4/26

6:05 am-11:15 am

Nonstop3h 10m

$373

HoustonOntario

IAH - ONT

IAHONT

Houston George Bush Intcntl

Tue 6/9

11:30 am-11:44 pm

2 stops14h 14m

Ontario

Tue 6/16

10:59 pm-8:41 am

1 stop7h 42m

$388

HoustonOntario

IAH - ONT

IAHONT

Houston George Bush Intcntl

Thu 4/16

8:14 pm-9:50 pm

Nonstop3h 36m

Ontario

Sat 4/18

6:05 am-11:15 am

Nonstop3h 10m

$389

HoustonOntario

IAH - ONT

IAHONT

Houston George Bush Intcntl

Wed 4/15

8:14 pm-9:50 pm

Nonstop3h 36m

Ontario

Mon 4/20

6:05 am-11:15 am

Nonstop3h 10m

$393

HoustonOntario

IAH - ONT

IAHONT

Houston George Bush Intcntl

Wed 4/8

8:14 pm-9:50 pm

Nonstop3h 36m

Ontario

Sat 4/11

1:27 pm-10:52 pm

1 stop7h 25m

$393

HoustonOntario

IAH - ONT

IAHONT

Houston George Bush Intcntl

Tue 7/7

6:35 pm-11:44 pm

1 stop7h 09m

Ontario

Wed 7/15

9:55 am-5:47 pm

1 stop5h 52m

$397

HoustonOntario

IAH - ONT

IAHONT

Houston George Bush Intcntl

Wed 4/8

8:14 pm-9:50 pm

Nonstop3h 36m

Ontario

Fri 4/10

1:43 pm-11:14 pm

1 stop7h 31m

$397

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/21

Showing 1-10 of 21 resultsSorted by cheapest first
1
2
3

Compare providers for flights from George Bush Intcntl to Ontario

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 George Bush Intcntl to Ontario in March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy2 starsTrust Score*2 stars
CheapOairPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars

*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 Houston George Bush Intcntl Airport-Ontario flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Houston George Bush Intcntl Airport-Ontario flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Houston George Bush Intcntl Airport-Ontario flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Houston George Bush Intcntl Airport-Ontario 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 Houston George Bush Intcntl Airport-Ontario 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 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 March 13, 2026.

The best time to book flights from Houston George Bush Intcntl Airport to Ontario is 31 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, November is the cheapest month in which you can book a flight from Houston George Bush Intcntl Airport to Ontario (average of $54). Flying from Houston George Bush Intcntl Airport to Ontario in March is currently the most expensive (average of $98). 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 March 22, 2026.

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 38% 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 March 14, 2026.

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

The best insider tips for Houston George Bush Intcntl Airport to Ontario 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 Houston George Bush Intcntl Airport to Ontario 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 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 March 22, 2026.
Peruse reviews from past customers who have flown with United Airlines,American Airlines, andFrontier 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
9,459 reviews

Crew

8.1

Entertainment

7.1

Comfort

7.3

Boarding

7.7

Food

6.6

Overall

7.4

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
United Airlines
7.4
Good
9,459 reviews
United Airlines
7.4
Good
9,459 reviews

Crew

8.1

Entertainment

7.1

Comfort

7.3

Boarding

7.7

Food

6.6

Overall

7.4

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
American Airlines
7.1
Good
11,485 reviews
United Airlines
7.4
Good
9,459 reviews

Crew

8.1

Entertainment

7.1

Comfort

7.3

Boarding

7.7

Food

6.6

Overall

7.4

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
Frontier
5.7
Fair
3,020 reviews
United Airlines
7.4
Good
9,459 reviews

Crew

8.1

Entertainment

7.1

Comfort

7.3

Boarding

7.7

Food

6.6

Overall

7.4

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000

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 3 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 36m. Fly via Delta or United Airlines to get the fastest option. The distance from Houston George Bush Intcntl Airport to Ontario is about 1330 mi. This flight may include one or multiple stops.

  • 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 $63 on this airline. Additional options worth looking into are United Airlines and American Airlines, starting at $134 and $236 round-trip. You may be able to fly from Houston George Bush Intcntl Airport to Ontario for 71% 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 $64. However, be on the lookout for offers from American Airlines and United 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: Frontier (100%), Volaris (100%), United Airlines (95%).

  • 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 $210, our data shows the cheapest flight currently is $54. When looking at the most popular route, (Houston George Bush Intcntl - Ontario), you can expect to pay $124 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, November is the cheapest month in which you can book a flight from Houston George Bush Intcntl Airport to Ontario (average of $54). Flying from Houston George Bush Intcntl Airport to Ontario in March is currently the most expensive (average of $98). 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 3 airlines flying from George Bush Intcntl to Ontario

Discover the top 3 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 March 22, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$63Average$175FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$134Average$371FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$236Average$381FlexibilityNo cancel feeOn-time71%

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