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Ontario

$78+ 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 8/29. Fares are subject to change and may not be available on all flights or dates of travel.
HOU — ONT
Aug 5 — Aug 121
Tue 8/5
Tue 8/12
1 adult, Economy
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Cheapflights Tip: The best prices from Houston to Ontario are usually found in February or September, booked 55 days in advance, depart on a Saturday 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 July 31, 2025.

Round-trip from

$149
(CheapOair)

One-way from

$78
(Frontier)

Popular in

June

Cheapest in

February

Average price

$214
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. 11% potential increase in price ($26 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($11 potential savings vs. average RT price).
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Average for round-trip flights in July 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 July 31, 2025.

This CheapOair deal was found by Cheapflights users on 7/30. 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 10/245:14 pmIAH - ONT
Nonstop3h 26mFrontier
Sun 10/2612:40 pmONT - IAH
Nonstop3h 16mFrontier
Deal found 7/30$151
This United Airlines deal was found by Cheapflights users on 7/30. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/267:59 pmIAH - ONT
Nonstop3h 25mUnited Airlines
Mon 9/296:00 amONT - IAH
Nonstop3h 10mUnited Airlines
Deal found 7/30$191
This Southwest deal was found by Cheapflights users on 7/31. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/267:50 amHOU - ONT
Nonstop3h 15mSouthwest
Mon 9/296:20 amONT - HOU
Nonstop3h 10mSouthwest
Deal found 7/31$191
This Alaska Airlines deal was found by Cheapflights users on 7/30. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/116:00 amIAH - ONT
1 stop10h 12mAlaska Airlines
Tue 9/167:10 amONT - IAH
1 stop7h 49mAlaska Airlines
Deal found 7/30$210
This American Airlines deal was found by Cheapflights users on 7/29. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/27:47 amIAH - ONT
1 stop6h 05mAmerican Airlines
Tue 9/96:10 amONT - IAH
1 stop5h 30mAmerican Airlines
Deal found 7/29$211
This American Airlines deal was found by Cheapflights users on 7/29. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/298:25 pmHOU - ONT
1 stop5h 42mAmerican Airlines
Sun 8/3111:59 pmONT - HOU
1 stop6h 21mAmerican Airlines
Deal found 7/29$211
This Delta deal was found by Cheapflights users on 7/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/51:05 pmHOU - ONT
1 stop8h 06mDelta
Tue 9/911:45 amONT - HOU
1 stop8h 46mDelta
Deal found 7/29$237

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 July 31, 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 10/30

5:14 pm-6:40 pm

Nonstop3h 26m

Ontario

Fri 10/31

12:40 pm-5:56 pm

Nonstop3h 16m

$146

HoustonOntario

IAH - ONT

IAHONT

Houston George Bush Intcntl

Fri 9/26

7:59 pm-9:24 pm

Nonstop3h 25m

Ontario

Mon 9/29

6:00 am-11:10 am

Nonstop3h 10m

$191

HoustonOntario

HOU - ONT

HOUONT

Houston Hobby

Fri 9/26

7:50 am-9:05 am

Nonstop3h 15m

Ontario

Mon 9/29

6:20 am-11:30 am

Nonstop3h 10m

$191

HoustonOntario

IAH - ONT

IAHONT

Houston George Bush Intcntl

Thu 9/11

5:59 pm-11:54 pm

1 stop7h 55m

Ontario

Tue 9/16

7:10 am-4:59 pm

1 stop7h 49m

$210

HoustonOntario

IAH - ONT

IAHONT

Houston George Bush Intcntl

Thu 9/4

5:00 am-10:03 am

1 stop7h 03m

Ontario

Mon 9/8

4:45 pm-11:28 pm

1 stop4h 43m

$211

HoustonOntario

HOU - ONT

HOUONT

Houston Hobby

Fri 8/29

8:25 pm-12:07 am

1 stop5h 42m

Ontario

Sun 8/31

11:59 pm-8:20 am

1 stop6h 21m

$211

HoustonOntario

HOU - ONT

HOUONT

Houston Hobby

Fri 9/5

1:05 pm-7:11 pm

1 stop8h 06m

Ontario

Tue 9/9

11:45 am-10:31 pm

1 stop8h 46m

$237

HoustonOntario

IAH - ONT

IAHONT

Houston George Bush Intcntl

Fri 8/29

5:16 pm-6:34 pm

Nonstop3h 18m

$78

HoustonOntario

HOU - ONT

HOUONT

Houston Hobby

Mon 9/29

7:50 am-9:05 am

Nonstop3h 15m

$96

HoustonOntario

IAH - ONT

IAHONT

Houston George Bush Intcntl

Wed 11/19

7:00 am-3:17 pm

1 stop10h 17m

$99

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/31

Showing 1-10 of 16 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 July 25, 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 July 31, 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. Sunday 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 July 31, 2025.
See what other customers who have flown with Alaska Airlines, Southwest, and Delta 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.
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Overall

8.0

Boarding

8.1

Food

7.1

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Overall

8.0

Boarding

8.1

Food

7.1

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Southwest
8.0
Very good
4,246 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Overall

8.0

Boarding

8.1

Food

7.1

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,981 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Overall

8.0

Boarding

8.1

Food

7.1

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.8
Good
2,611 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Overall

8.0

Boarding

8.1

Food

7.1

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,900 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Overall

8.0

Boarding

8.1

Food

7.1

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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 0 inbound flights from Houston per day.

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

    Currently priced at $149, Frontier will fly you from Houston to Ontario and back. In addition to Frontier, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from United Airlines and Southwest - these airlines can fly you to your destination from $191 and $191, respectively. Frontier is currently priced 30% 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 $78 on Frontier. Other airlines that offer cheap prices include Southwest from $96 and Hawaiian Airlines from $105 one-way.

  • What are the cheapest flights from Houston to Ontario?

    On average you can expect to pay $219 for a flight from Houston to Ontario. The cheapest flight overall is $95 while the most popular route, (Houston Hobby - Ontario) is currently priced at $106.

  • 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 July 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$83Average$168FlexibilityNo cancel feeOn-time65%
FrontierCheapest$85Average$178FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$148Average$383FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$196Average$401FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$224Average$394FlexibilityNo cancel feeOn-time63%

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