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Ontario

$55+ Cheap flights from Houston 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 12/5. Fares are subject to change and may not be available on all flights or dates of travel.
HOU — ONT
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
1 adult, Economy
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Cheapflights Tip: The best prices from Houston to Ontario are usually found in February or April, booked 55 days in advance, depart on a Tuesday or Wednesday and return on a Tuesday

Cheap flight deals from Houston to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Houston (HO1) 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 15, 2025.

Round-trip from

$118
(Cheapflightsfares)

One-way from

$55
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$188
From Houston to Ontario
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One-way flight from Houston to Ontario
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Highest demand for flights based on searches. 16% potential increase in price ($43 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($10 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Houston to Ontario

Cheapest flights from Houston to Ontario
Explore the most affordable flight options available from Houston to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 15, 2025.

This Gotogate deal was found by Cheapflights users on 9/12. 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.
Fri 9/269:08 pmIAH - ONT
1 stop24h 46mFrontier
Fri 10/312:28 pmONT - IAH
Nonstop3h 19mFrontier
Deal found 9/12$120
This Frontier deal was found by Cheapflights users on 9/14. 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 11/145:23 pmIAH - ONT
Nonstop3h 26mFrontier
Sat 11/1512:05 pmONT - IAH
1 stop9h 34mFrontier
Deal found 9/14$123
This Mytrip deal was found by Cheapflights users on 9/13. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/166:00 amIAH - ONT
1 stop19h 50mFrontier
Mon 10/2012:32 pmONT - IAH
Nonstop3h 16mFrontier
Deal found 9/13$124
This Mytrip deal was found by Cheapflights users on 9/13. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/86:00 amIAH - ONT
1 stop19h 50mFrontier
Thu 10/1612:32 pmONT - IAH
Nonstop3h 16mFrontier
Deal found 9/13$125
This Cheapflightsfares deal was found by Cheapflights users on 9/14. 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
Fri 10/1012:32 pmONT - IAH
Nonstop3h 16mFrontier
Deal found 9/14$127
This Kiwi.com deal was found by Cheapflights users on 9/13. 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.
Fri 10/102:59 pmIAH - ONT
Nonstop3h 29mFrontier
Sun 10/1212:49 pmONT - IAH
Nonstop3h 16mFrontier
Deal found 9/13$130
This Cheapflightsfares deal was found by Cheapflights users on 9/12. 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.
Sun 10/55:07 pmIAH - ONT
Nonstop3h 28mFrontier
Sun 10/1212:49 pmONT - IAH
Nonstop3h 16mFrontier
Deal found 9/12$133
This Kiwi.com deal was found by Cheapflights users on 9/13. 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.
Fri 9/265:07 pmIAH - ONT
Nonstop3h 28mMultiple Airlines
Tue 9/308:00 amONT - IAH
1 stop6h 43mMultiple Airlines
Deal found 9/13$137
This CheapOair deal was found by Cheapflights users on 9/14. 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.
Mon 10/136:00 amIAH - ONT
1 stop19h 50mFrontier
Mon 10/2012:32 pmONT - IAH
Nonstop3h 16mFrontier
Deal found 9/14$139
This Booking.com deal was found by Cheapflights users on 9/13. 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 10/811:36 amIAH - ONT
1 stop14h 14mFrontier
Sun 10/1212:49 pmONT - IAH
Nonstop3h 16mFrontier
Deal found 9/13$140
This Kiwi.com deal was found by Cheapflights users on 9/13. 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 9/219:26 pmIAH - ONT
1 stop11h 51mMultiple Airlines
Thu 9/2512:28 pmONT - IAH
Nonstop3h 19mMultiple Airlines
Deal found 9/13$142
This CheapOair deal was found by Cheapflights users on 9/14. 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.
Fri 10/35:07 pmIAH - ONT
Nonstop3h 28mFrontier
Wed 10/86:53 amONT - IAH
1 stop14h 43mFrontier
Deal found 9/14$143

Cheapflights Fare Finder

 
Customize your flight search to find flights from Houston 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 15, 2025.
Use the filters below to find and compare flights from Houston to Ontario that are best for you.

Fly from

Houston

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

Thu 10/2

3:43 pm-11:39 pm

1 stop5h 56m

$187

HoustonOntario

IAH - ONT

IAHONT

Houston George Bush Intcntl

Fri 10/3

7:59 pm-9:24 pm

Nonstop3h 25m

Ontario

Mon 10/6

6:00 am-11:10 am

Nonstop3h 10m

$261

HoustonOntario

HOU - ONT

HOUONT

Houston Hobby

Thu 10/2

1:40 pm-2:55 pm

Nonstop3h 15m

Ontario

Thu 10/9

5:55 pm-12:35 am

1 stop4h 40m

$284

HoustonOntario

HOU - ONT

HOUONT

Houston Hobby

Wed 10/1

6:00 am-11:57 am

1 stop7h 57m

Ontario

Sun 10/5

11:59 pm-8:28 am

1 stop6h 29m

$294

HoustonOntario

HOU - ONT

HOUONT

Houston Hobby

Fri 12/12

2:05 pm-3:35 pm

Nonstop3h 30m

Ontario

Sun 12/14

4:40 pm-11:00 pm

1 stop4h 20m

$297

HoustonOntario

IAH - ONT

IAHONT

Houston George Bush Intcntl

Sun 10/5

7:59 pm-9:24 pm

Nonstop3h 25m

Ontario

Mon 10/6

6:00 am-11:10 am

Nonstop3h 10m

$311

HoustonOntario

IAH - ONT

IAHONT

Houston George Bush Intcntl

Tue 10/14

7:59 pm-9:24 pm

Nonstop3h 25m

Ontario

Wed 10/22

6:00 am-11:10 am

Nonstop3h 10m

$325

HoustonOntario

HOU - ONT

HOUONT

Houston Hobby

Fri 10/10

8:11 pm-11:59 pm

1 stop5h 48m

Ontario

Mon 10/20

11:59 pm-9:42 am

1 stop7h 43m

$331

HoustonOntario

IAH - ONT

IAHONT

Houston George Bush Intcntl

Fri 10/17

7:59 pm-9:24 pm

Nonstop3h 25m

Ontario

Sun 10/19

6:00 am-11:10 am

Nonstop3h 10m

$331

HoustonOntario

IAH - ONT

IAHONT

Houston George Bush Intcntl

Thu 10/16

7:59 pm-9:24 pm

Nonstop3h 25m

Ontario

Sun 10/19

6:00 am-11:10 am

Nonstop3h 10m

$331

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/13

Showing 1-10 of 38 results
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The best insider tips for Houston 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 to Ontario trip
Airlines
Frontier

Frontier offers extra comfort seats with 32” or 35” separation for a fee.


Frontier’s Zone 1 boarding is available with a carry-on purchase or special fare bundle.

Read more about Frontierby Marisa Garcia
United Airlines

United’s Economy Plus offers extra legroom seats towards the front of the economy cabin.


United’s Polaris Lounges offer showers, napping areas, and dining for premium passengers.

Read more about United Airlinesby Harriet Baskas
Airports
IAH

Check the IAH website for security wait times to manage your schedule effectively before departure.

Read more about IAHby Evie Carrick
HOU

HOU’s compact terminal allows travelers to arrive closer to departure time, minimizing wait times and making navigation easier.

Read more about HOUby Scott Laird
ONT

Consider renting a car at ONT for convenient travel around the L.A. area, with easy access to I-10.

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
Scott Laird

Scott Laird

Expert on HOU

Scott Laird

Scott Laird

Originally from Anchorage, Alaska, Scott is a frequent contributor to Fodor’s Travel Guide, Conde Nast Traveler, TravelAge West, and TravelPulse. He holds a Bachelor of Science in Organizational Management from Alaska Pacific University and a Master of Science in Airline Management from Embry-Riddle Aeronautical University, and has worked in the airline and hotel industries and as a travel consultant.

Read more

Best time to book a flight from Houston to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Houston 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 to Ontario

How far ahead should I book a flight from Houston to Ontario?

Use this chart to determine the optimal time to book a round-trip flight from Houston to Ontario. Price data was last updated on September 12, 2025.

The best time to book flights from Houston to Ontario is 55 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 to Ontario?

Currently, August is the cheapest month in which you can book a flight from Houston to Ontario (average of $246). Flying from Houston 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 HOU to ONT?

Find hourly flight availability from Houston 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 15, 2025.

A simple way to save on the total cost of your ticket is to fly from Houston to Ontario in the evening. If you’re flexible enough to do this you can expect to save up to 55% on your trip compared to booking a flight at noon.

What is the cheapest day to fly from Houston to Ontario?

Use this chart to determine the cheapest time to fly round-trip from Houston to Ontario. Price data was last updated on October 27, 2024.

Travelers seeking maximum savings on their Houston to Ontario flight should consider departing on Tuesday afternoons when fares are most often at their lowest. Friday at noon 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 15, 2025.
See what other customers who have flown with Southwest, United Airlines, and American Airlines from Houston to Ontario have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,242 reviews

Entertainment

7.5

Overall

8.0

Comfort

8.0

Boarding

8.1

Crew

8.6

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Southwest
8.0
Very good
4,242 reviews
Southwest
8.0
Very good
4,242 reviews

Entertainment

7.5

Overall

8.0

Comfort

8.0

Boarding

8.1

Crew

8.6

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
United Airlines
7.4
Good
8,929 reviews
Southwest
8.0
Very good
4,242 reviews

Entertainment

7.5

Overall

8.0

Comfort

8.0

Boarding

8.1

Crew

8.6

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,242 reviews

Entertainment

7.5

Overall

8.0

Comfort

8.0

Boarding

8.1

Crew

8.6

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Spirit Airlines
6.3
Okay
8,015 reviews
Southwest
8.0
Very good
4,242 reviews

Entertainment

7.5

Overall

8.0

Comfort

8.0

Boarding

8.1

Crew

8.6

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Frontier
5.8
Fair
3,172 reviews
Southwest
8.0
Very good
4,242 reviews

Entertainment

7.5

Overall

8.0

Comfort

8.0

Boarding

8.1

Crew

8.6

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.

Related info for your journey

Find useful and relevant information for your journey from Houston 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?

    Ontario (ONT), located 3.1 mi from the city center, is the airport you fly into when you book flights from Houston to Ontario. 5 airlines have flights to Ontario from Houston on a regular basis. Booking flights from Houston to Ontario should not be difficult; the airport handles an average of 2 inbound flights from Houston per day.

  • How long is the flight from Houston to Ontario?

    There are many flights that can get you from Houston to Ontario in 3h 15m. Fly via Frontier, United Airlines, or Southwest to get the fastest option. The distance between Houston and Ontario is about 1341 mi. Most flights are nonstop.

  • What are the cheapest airlines flying from Houston to Ontario round-trip?

    Currently priced at $83, Spirit Airlines will fly you from Houston to Ontario and back. In addition to Spirit Airlines, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Frontier and United Airlines - these airlines can fly you to your destination from $84 and $158, respectively. Spirit Airlines is currently priced 61% below the average price you’ll pay for this route.

  • What are the cheapest airlines to fly from Houston to Ontario one-way?

    One-way options have recently been found by users for as low as $106 on Southwest. Other airlines that offer cheap prices include Alaska Airlines from $115 and Hawaiian Airlines from $115 one-way.

  • What are the cheapest flights from Houston to Ontario?

    On average you can expect to pay $459 for a flight from Houston to Ontario. The cheapest flight overall is $214 while the most popular route, (Houston Hobby - Ontario) is currently priced at $92.

  • Can I find deals for flights from Houston to Ontario that include hotel bookings?

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

  • How can I find direct flights from Houston to Ontario?

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

  • Can I find deals for business class flights from Houston to Ontario?

    Yes. Cheapflights offers flight deals from Houston 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 to Ontario?

    Currently, August is the cheapest month in which you can book a flight from Houston to Ontario (average of $246). Flying from Houston 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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Alternative routes for Houston to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
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Top 5 airlines flying from Houston to Ontario

Discover the top 5 airlines that operate flights from Houston 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 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$83Average$189FlexibilityNo cancel feeOn-time65%
FrontierCheapest$84Average$179FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$158Average$386FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$196Average$378FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$224Average$389FlexibilityNo cancel feeOn-time63%

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