HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Ontario

$57+ 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 4/19. Fares are subject to change and may not be available on all flights or dates of travel.
HOU — ONT
Apr 2 — Apr 91
Wed 4/2
Wed 4/9
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Houston to Ontario with Cheapflights

1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”
2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.
3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from Houston to Ontario are usually found in February or September, booked 55 days in advance, depart on a Wednesday or Tuesday 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 March 28, 2025.

Round-trip from

$109
(Cheapflightsfares)

One-way from

$58
(CheapOair)

Popular in

November

Cheapest in

February

Average price

$200
From Houston to Ontario
Search Deals
One-way flight from Houston to Ontario
Search Deals
Highest demand for flights based on searches. 18% potential increase in price ($45 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($7 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2025
Search Deals

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 March 28, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/1112:09 pmIAH - ONT
Nonstop3h 33mFrontier
Mon 4/144:09 pmONT - IAH
Nonstop3h 02mFrontier
Deal found 3/27$113
This Southwest deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/26:20 amHOU - ONT
1 stop6h 40mSouthwest
Tue 5/61:15 pmONT - HOU
Nonstop3h 00mSouthwest
Deal found 3/26$187
This American Airlines deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/236:00 amHOU - ONT
1 stop7h 46mAmerican Airlines
Wed 4/302:44 pmONT - HOU
1 stop7h 12mAmerican Airlines
Deal found 3/27$197
This American Airlines deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/38:26 amIAH - ONT
1 stop5h 33mAmerican Airlines
Wed 5/710:00 amONT - IAH
2 stops6h 47mAmerican Airlines
Deal found 3/27$202
This United Airlines deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/317:50 pmIAH - ONT
Nonstop3h 20mUnited Airlines
Mon 6/26:00 amONT - IAH
Nonstop3h 15mUnited Airlines
Deal found 3/26$257
This Delta deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/17:40 amIAH - ONT
1 stop6h 38mDelta
Tue 7/810:59 pmONT - IAH
1 stop7h 33mDelta
Deal found 3/27$268
This Alaska Airlines deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/315:54 pmIAH - ONT
1 stop8h 03mAlaska Airlines
Thu 6/57:20 pmONT - IAH
1 stop9h 00mAlaska Airlines
Deal found 3/26$277
This Delta deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/126:00 amHOU - ONT
1 stop7h 29mDelta
Sat 4/1910:15 pmONT - HOU
1 stop9h 03mDelta
Deal found 3/27$277
This Cheapflightsfares deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/910:36 amHOU - ONT
1 stop5h 51mFrontier
Tue 4/1512:59 amONT - HOU
1 stop6h 33mFrontier
Deal found 3/27$295
This Expedia deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/295:54 pmIAH - ONT
1 stop8h 03mMultiple Airlines
Mon 6/912:40 pmONT - IAH
Nonstop3h 30mMultiple Airlines
Deal found 3/27$314

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 March 28, 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

Fri 4/11

12:09 pm-1:42 pm

Nonstop3h 33m

Ontario

Mon 4/14

4:09 pm-9:11 pm

Nonstop3h 02m

$113

HoustonOntario

HOU - ONT

HOUONT

Houston Hobby

Fri 5/2

6:20 am-11:00 am

1 stop6h 40m

Ontario

Tue 5/6

1:15 pm-6:15 pm

Nonstop3h 00m

$187

HoustonOntario

HOU - ONT

HOUONT

Houston Hobby

Wed 4/23

6:00 am-11:46 am

1 stop7h 46m

Ontario

Wed 4/30

2:44 pm-11:56 pm

1 stop7h 12m

$197

HoustonOntario

IAH - ONT

IAHONT

Houston George Bush Intcntl

Sat 5/3

8:26 am-11:59 am

1 stop5h 33m

Ontario

Wed 5/7

10:00 am-6:47 pm

2 stops6h 47m

$202

HoustonOntario

IAH - ONT

IAHONT

Houston George Bush Intcntl

Sat 5/31

7:50 pm-9:10 pm

Nonstop3h 20m

Ontario

Mon 6/2

6:00 am-11:15 am

Nonstop3h 15m

$257

HoustonOntario

IAH - ONT

IAHONT

Houston George Bush Intcntl

Sat 5/31

5:54 pm-11:57 pm

1 stop8h 03m

Ontario

Thu 6/5

7:20 pm-6:20 am

1 stop9h 00m

$277

HoustonOntario

HOU - ONT

HOUONT

Houston Hobby

Sat 4/12

6:00 am-11:29 am

1 stop7h 29m

Ontario

Sat 4/19

10:15 pm-9:18 am

1 stop9h 03m

$277

HoustonOntario

HOU - ONT

HOUONT

Houston Hobby

Wed 4/9

10:36 am-2:27 pm

1 stop5h 51m

Ontario

Tue 4/15

12:59 am-9:32 am

1 stop6h 33m

$295

HoustonOntario

IAH - ONT

IAHONT

Houston George Bush Intcntl

Tue 5/27

5:54 pm-11:57 pm

1 stop8h 03m

Ontario

Sat 5/31

12:59 am-10:23 am

1 stop7h 24m

$313

HoustonOntario

IAH - ONT

IAHONT

Houston George Bush Intcntl

Fri 4/18

2:51 pm-11:41 pm

2 stops10h 50m

Ontario

Sun 4/20

6:00 am-6:40 pm

2 stops10h 40m

$343

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/27

Showing 1-10 of 19 results
1
2

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 security wait times on the IAH Depart tab for all terminals to plan your arrival time efficiently.

Read more about IAHby Evie Carrick
ONT

Consider rental cars at ONT for easy access to Southern California destinations. ONT's rental center has ten major companies on-site.

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 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 March 21, 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 $326). 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 March 28, 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 59% 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. Monday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Rainfall in Ontario by month

Plan your trip to Ontario by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Ontario ranges from 0.1 - 3.4 inches per month. February is typically the wettest month, when rainfall can reach 3.4 in. June is typically the driest time to visit Ontario when rainfall is around 0.1 in.

Temperature in Ontario by month

Plan your trip to Ontario by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Ontario, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 53.6 F).

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 28, 2025.
See what other customers who have flown with Southwest, Alaska Airlines 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.
Southwest
8.1
Very good
4,274 reviews

Entertainment

7.6

Overall

8.1

Comfort

8.1

Food

7.1

Boarding

8.2

Crew

8.7

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Southwest
8.1
Very good
4,274 reviews
Southwest
8.1
Very good
4,274 reviews

Entertainment

7.6

Overall

8.1

Comfort

8.1

Food

7.1

Boarding

8.2

Crew

8.7

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Alaska Airlines
8.0
Very good
9,798 reviews
Southwest
8.1
Very good
4,274 reviews

Entertainment

7.6

Overall

8.1

Comfort

8.1

Food

7.1

Boarding

8.2

Crew

8.7

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Delta
8.0
Very good
7,897 reviews
Southwest
8.1
Very good
4,274 reviews

Entertainment

7.6

Overall

8.1

Comfort

8.1

Food

7.1

Boarding

8.2

Crew

8.7

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
United Airlines
7.4
Good
8,603 reviews
Southwest
8.1
Very good
4,274 reviews

Entertainment

7.6

Overall

8.1

Comfort

8.1

Food

7.1

Boarding

8.2

Crew

8.7

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
4,274 reviews

Entertainment

7.6

Overall

8.1

Comfort

8.1

Food

7.1

Boarding

8.2

Crew

8.7

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

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. 6 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 $109, 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 Southwest and American Airlines - these airlines can fly you to your destination from $187 and $197, respectively. Frontier is currently priced 45% 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 $58 on Frontier. Other airlines that offer cheap prices include United Airlines from $89 and Southwest from $89 one-way.

  • What are the cheapest flights from Houston to Ontario?

    On average you can expect to pay $360 for a flight from Houston to Ontario. The cheapest flight overall is $128 while the most popular route, (Houston Hobby - Ontario) is currently priced at $109.

  • 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 $326). 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

Browse thousands of different options on Cheapflights for your next trip

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

Alternative routes for Houston to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
Dallas/Fort Worth to Las Vegas flights
Hobby to Las Vegas flights
Dallas/Fort Worth to Los Angeles flights
Hobby to Los Angeles flights
George Bush Intcntl to Las Vegas flights
George Bush Intcntl to Los Angeles flights
Dallas/Fort Worth to San Francisco flights
Dallas/Fort Worth to Burbank flights
Dallas/Fort Worth to San Diego flights
Love Field to Las Vegas flights
Austin to Las Vegas flights
Dallas/Fort Worth to Santa Ana flights
Hobby to San Francisco flights
Hobby to Ontario flights
George Bush Intcntl to Ontario flights
Austin to Los Angeles flights
Dallas/Fort Worth to Ontario flights
George Bush Intcntl to San Francisco flights
San Antonio to Las Vegas flights
Love Field to Los Angeles flights
Hobby to San Diego flights
Dallas/Fort Worth to San Jose flights
Austin to San Diego flights
Dallas/Fort Worth to Oakland flights
Austin to San Francisco flights
George Bush Intcntl to San Diego flights
Hobby to Santa Ana flights
San Antonio to Los Angeles flights
Austin to Ontario flights
George Bush Intcntl to Santa Ana flights
Hobby to Burbank flights
George Bush Intcntl to Burbank flights
Hobby to Oakland flights
Dallas/Fort Worth to Reno flights
Love Field to San Diego flights
Dallas/Fort Worth to Sacramento flights
Austin to San Jose flights
Hobby to Sacramento flights
El Paso to Las Vegas flights
Austin to Santa Ana flights
Hobby to San Jose flights
Austin to Oakland flights
George Bush Intcntl to Oakland flights
Midland to Las Vegas flights
San Antonio to San Francisco flights
Love Field to San Francisco flights
Love Field to San Jose flights
Love Field to Ontario flights
Austin to Burbank flights
George Bush Intcntl to San Jose flights

Top 6 airlines flying from Houston to Ontario

Discover the top 6 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 March 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$83Average$172FlexibilityNo cancel feeOn-time65%
FrontierCheapest$83Average$170FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$179Average$365FlexibilityNo cancel feeOn-time69%
DeltaCheapest$193Average$306FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$246Average$370FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$258Average$409FlexibilityNo cancel feeOn-time63%
100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.