HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
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 3/3. Fares are subject to change and may not be available on all flights or dates of travel.
HOU — ONT
Feb 28 — Mar 71
Sat 2/28
Sat 3/7
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 April, booked 55 days in advance, depart on a Tuesday or Wednesday and return on a Tuesday

Cheap 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 January 29, 2026.

This Expedia deal was found by Cheapflights users on 1/27. 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.
Tue 2/246:45 am
IAH
-
ONT
1 stop16h 49m
Frontier
Tue 3/38:40 am
ONT
-
IAH
1 stop8h 34m
Frontier
Deal found 1/27$128
This Frontier deal was found by Cheapflights users on 1/27. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/214:59 pm
IAH
-
ONT
1 stop9h 00m
Frontier
Wed 2/258:40 am
ONT
-
IAH
1 stop8h 34m
Frontier
Deal found 1/27$138
This CheapOair deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/186:45 am
IAH
-
ONT
1 stop16h 49m
Frontier
Wed 2/257:17 pm
ONT
-
IAH
1 stop14h 48m
Frontier
Deal found 1/28$139
This Booking.com deal was found by Cheapflights users on 1/26. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/248:45 am
IAH
-
ONT
1 stop14h 49m
Frontier
Sat 2/286:00 am
ONT
-
IAH
1 stop7h 52m
Frontier
Deal found 1/26$144
This CheapOair deal was found by Cheapflights users on 1/27. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/214:59 pm
IAH
-
ONT
1 stop9h 00m
Frontier
Mon 2/236:10 am
ONT
-
IAH
1 stop16h 23m
Frontier
Deal found 1/27$148
This CheapOair deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/256:45 am
IAH
-
ONT
1 stop16h 49m
Frontier
Wed 3/48:40 am
ONT
-
IAH
1 stop12h 52m
Frontier
Deal found 1/28$149
This Frontier deal was found by Cheapflights users on 1/27. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/144:59 pm
IAH
-
ONT
1 stop9h 00m
Frontier
Wed 2/187:30 am
ONT
-
IAH
1 stop9h 44m
Frontier
Deal found 1/27$154
This Frontier deal was found by Cheapflights users on 1/27. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/2010:31 am
IAH
-
ONT
Nonstop3h 52m
Frontier
Sat 2/216:00 am
ONT
-
IAH
1 stop7h 52m
Frontier
Deal found 1/27$159
This Booking.com deal was found by Cheapflights users on 1/27. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/178:45 am
IAH
-
ONT
1 stop14h 49m
Frontier
Sat 2/216:00 am
ONT
-
IAH
1 stop7h 52m
Frontier
Deal found 1/27$161
This Expedia deal was found by Cheapflights users on 1/27. 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.
Wed 2/118:45 am
IAH
-
ONT
1 stop14h 49m
Frontier
Mon 2/161:18 pm
ONT
-
IAH
Nonstop3h 21m
Frontier
Deal found 1/27$164
This Southwest deal was found by Cheapflights users on 1/27. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/278:00 am
HOU
-
ONT
Nonstop3h 30m
Southwest
Tue 5/1212:55 pm
ONT
-
HOU
Nonstop3h 00m
Southwest
Deal found 1/27$333
This Southwest deal was found by Cheapflights users on 1/27. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/289:00 pm
HOU
-
ONT
Nonstop3h 25m
Southwest
Sat 5/26:00 am
ONT
-
HOU
1 stop5h 50m
Southwest
Deal found 1/27$339

Find 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 January 29, 2026.

Round-trip from

$128
(Expedia)

One-way from

$55
(Kiwi.com)

Popular in

December

Cheapest in

February

Average price

$229
From Houston to Ontario
Search Deals
One-way flight from Houston to Ontario
Search Deals
Highest demand for flights based on searches. 17% potential increase in price ($48 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($15 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

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 January 29, 2026.
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

Tue 5/12

6:18 pm-11:48 pm

1 stop7h 30m

Ontario

Wed 5/13

7:41 pm-6:23 am

1 stop8h 42m

$257

HoustonOntario

IAH - ONT

IAHONT

Houston George Bush Intcntl

Sat 2/21

4:59 pm-11:59 pm

1 stop9h 00m

Ontario

Sun 2/22

6:10 am-9:36 am

1 stop25h 26m

$272

HoustonOntario

IAH - ONT

IAHONT

Houston George Bush Intcntl

Thu 3/5

8:49 pm-10:36 pm

Nonstop3h 47m

Ontario

Mon 3/9

6:00 am-11:11 am

Nonstop3h 11m

$333

HoustonOntario

IAH - ONT

IAHONT

Houston George Bush Intcntl

Mon 6/8

8:17 pm-9:40 pm

Nonstop3h 23m

Ontario

Mon 7/13

6:02 am-10:59 am

Nonstop2h 57m

$333

HoustonOntario

HOU - ONT

HOUONT

Houston Hobby

Tue 4/28

8:50 am-3:10 pm

1 stop8h 20m

Ontario

Sat 5/2

6:00 am-1:50 pm

1 stop5h 50m

$348

HoustonOntario

HOU - ONT

HOUONT

Houston Hobby

Tue 6/2

7:00 am-11:35 am

2 stops6h 35m

Ontario

Tue 6/9

1:05 pm-6:20 pm

Nonstop3h 15m

$348

HoustonOntario

IAH - ONT

IAHONT

Houston George Bush Intcntl

Tue 6/2

6:30 am-12:32 pm

1 stop8h 02m

Ontario

Tue 6/9

1:00 pm-8:55 pm

1 stop5h 55m

$353

HoustonOntario

HOU - ONT

HOUONT

Houston Hobby

Wed 3/4

6:20 am-10:05 am

1 stop5h 45m

Ontario

Mon 3/9

11:55 pm-9:15 am

1 stop7h 20m

$353

HoustonOntario

IAH - ONT

IAHONT

Houston George Bush Intcntl

Wed 2/25

8:12 pm-9:59 pm

Nonstop3h 47m

Ontario

Wed 3/4

1:50 pm-10:00 pm

1 stop6h 10m

$355

HoustonOntario

HOU - ONT

HOUONT

Houston Hobby

Wed 2/25

3:35 pm-5:10 pm

Nonstop3h 35m

Ontario

Wed 3/4

11:15 am-5:50 pm

1 stop4h 35m

$355

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/28

Showing 1-10 of 38 results
1
2
3
4

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 January 23, 2026.

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, November is the cheapest month in which you can book a flight from Houston to Ontario (average of $54). Flying from Houston to Ontario in June is currently the most expensive (average of $88). 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 January 29, 2026.

A simple way to save on the total cost of your ticket is to fly from Houston to Ontario in the morning. If you’re flexible enough to do this you can expect to save up to 8% 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 January 24, 2026.

Travelers seeking maximum savings on their Houston 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 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 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
Scott Laird

Scott Laird

Expert on HOU

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

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 January 29, 2026.
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
4,267 reviews

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Crew

8.6

Overall

8.0

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
4,267 reviews
Southwest
8.0
Very good
4,267 reviews

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Crew

8.6

Overall

8.0

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
9,215 reviews
Southwest
8.0
Very good
4,267 reviews

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Crew

8.6

Overall

8.0

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
11,206 reviews
Southwest
8.0
Very good
4,267 reviews

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Crew

8.6

Overall

8.0

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
5.7
Fair
3,056 reviews
Southwest
8.0
Very good
4,267 reviews

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Crew

8.6

Overall

8.0

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. 4 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.

  • How long is the flight from Houston to Ontario?

    There are many flights that can get you from Houston to Ontario in 3h 47m. Fly via Alaska Airlines, Frontier, or United Airlines to get the fastest option. The distance between Houston and Ontario is about 1330 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    Currently priced at $60, 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 American Airlines - these airlines can fly you to your destination from $134 and $186, respectively. Frontier is currently priced 73% 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 $42 on Frontier. Other airlines that offer cheap prices include Southwest from $88 and United Airlines from $95 one-way.

  • What are the cheapest flights from Houston to Ontario?

    On average you can expect to pay $441 for a flight from Houston to Ontario. The cheapest flight overall is $333 while the most popular route, (Houston Hobby - Ontario) is currently priced at $139.

  • 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, November is the cheapest month in which you can book a flight from Houston to Ontario (average of $54). Flying from Houston to Ontario in June is currently the most expensive (average of $88). 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
Dallas/Fort Worth to San Francisco flights
Dallas/Fort Worth to Los Angeles flights
Hobby to Los Angeles flights
Austin to Las Vegas flights
Hobby to Las Vegas flights
George Bush Intcntl to Las Vegas flights
George Bush Intcntl to Los Angeles flights
Dallas/Fort Worth to Ontario flights
San Antonio to Las Vegas flights
Dallas/Fort Worth to Santa Ana flights
Austin to Los Angeles flights
Love Field to Las Vegas flights
Dallas/Fort Worth to San Diego flights
Hobby to San Francisco flights
Austin to San Francisco flights
Hobby to Ontario flights
George Bush Intcntl to Ontario flights
Dallas/Fort Worth to San Jose flights
Love Field to Los Angeles flights
Hobby to San Diego flights
George Bush Intcntl to San Francisco flights
San Antonio to Los Angeles flights
Hobby to Santa Ana flights
George Bush Intcntl to San Diego flights
Austin to San Diego flights
Love Field to San Francisco flights
Dallas/Fort Worth to Burbank flights
George Bush Intcntl to Santa Ana flights
Dallas/Fort Worth to Sacramento flights
Hobby to Burbank flights
Dallas/Fort Worth to Oakland flights
George Bush Intcntl to Burbank flights
Austin to Ontario flights
Dallas/Fort Worth to Palm Springs flights
El Paso to Las Vegas flights
Austin to San Jose flights
Love Field to Ontario flights
Dallas/Fort Worth to Reno flights
Love Field to San Diego flights
Hobby to Sacramento flights
Hobby to Reno flights
Hobby to Palm Springs flights
Austin to Oakland flights
Hobby to San Jose flights
Austin to Santa Ana flights
San Antonio to Ontario flights
George Bush Intcntl to Sacramento flights
El Paso to Los Angeles flights
San Antonio to San Francisco flights

Top 4 airlines flying from Houston to Ontario

Discover the top 4 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 January 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$60Average$166FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$134Average$380FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$186Average$370FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$224Average$372FlexibilityNo 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.
Site
©2026 Cheapflights