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$92+ 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 5/9. Fares are subject to change and may not be available on all flights or dates of travel.
HOU — ONT
Apr 26 — May 31
Sun 4/26
Sun 5/3
1 adult, Economy
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Find cheap flights from Houston to Ontario with Cheapflights

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Cheapflights Tip: The best prices from Houston to Ontario are usually found in August or April, booked 55 days in advance, depart on a Saturday or Monday 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 March 27, 2026.

This Frontier deal was found by Cheapflights users on 3/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/56:00 am
IAH
-
ONT
Nonstop3h 35m
Frontier
Tue 5/510:50 am
ONT
-
IAH
1 stop11h 54m
Frontier
Deal found 3/25$100
This Kiwi.com deal was found by Cheapflights users on 3/25. 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.
Wed 5/276:00 am
IAH
-
ONT
Nonstop3h 35m
Frontier
Tue 6/28:06 pm
ONT
-
IAH
Nonstop3h 19m
Frontier
Deal found 3/25$105
This Frontier deal was found by Cheapflights users on 3/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/56:00 am
IAH
-
ONT
Nonstop3h 35m
Frontier
Sat 5/95:59 pm
ONT
-
IAH
Nonstop3h 20m
Frontier
Deal found 3/25$106
This Mytrip deal was found by Cheapflights users on 3/25. 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.
Sat 5/96:45 am
IAH
-
ONT
Nonstop3h 35m
Frontier
Sat 5/165:59 pm
ONT
-
IAH
Nonstop3h 20m
Frontier
Deal found 3/25$107
This Kiwi.com deal was found by Cheapflights users on 3/25. 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 5/156:00 am
IAH
-
ONT
Nonstop3h 35m
Frontier
Tue 5/198:06 pm
ONT
-
IAH
Nonstop3h 19m
Frontier
Deal found 3/25$111
This Frontier deal was found by Cheapflights users on 3/25. 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 5/13:01 pm
IAH
-
ONT
Nonstop3h 37m
Frontier
Sat 5/95:59 pm
ONT
-
IAH
Nonstop3h 20m
Frontier
Deal found 3/25$112
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/13:01 pm
IAH
-
ONT
Nonstop3h 37m
Frontier
Fri 5/112:59 am
ONT
-
IAH
1 stop8h 43m
Frontier
Deal found 3/26$114
This Kiwi.com deal was found by Cheapflights users on 3/25. 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.
Thu 4/163:01 pm
IAH
-
ONT
Nonstop3h 37m
Frontier
Sun 4/198:21 am
ONT
-
IAH
Nonstop3h 20m
Frontier
Deal found 3/25$116
This Frontier deal was found by Cheapflights users on 3/25. 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.
Thu 4/163:01 pm
IAH
-
ONT
Nonstop3h 37m
Frontier
Thu 4/308:56 am
ONT
-
IAH
Nonstop3h 20m
Frontier
Deal found 3/25$117
This Frontier deal was found by Cheapflights users on 3/25. 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 5/13:01 pm
IAH
-
ONT
Nonstop3h 37m
Frontier
Sun 5/38:21 am
ONT
-
IAH
Nonstop3h 20m
Frontier
Deal found 3/25$118
This Frontier deal was found by Cheapflights users on 3/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/96:30 am
IAH
-
ONT
1 stop5h 35m
Frontier
Tue 6/95:43 pm
ONT
-
IAH
Nonstop3h 25m
Frontier
Deal found 3/24$120
This Priceline deal was found by Cheapflights users on 3/25. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/86:00 am
IAH
-
ONT
Nonstop3h 35m
Frontier
Tue 5/128:06 pm
ONT
-
IAH
Nonstop3h 19m
Frontier
Deal found 3/25$122

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 March 27, 2026.

Round-trip from

$100
(Frontier)

One-way from

$92
(CheapOair)

Popular in

December

Cheapest in

August

Average price

$248
From Houston to Ontario
Search Deals
One-way flight from Houston to Ontario
Search Deals
Highest demand for flights based on searches. 14% potential increase in price ($42 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($14 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 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 March 27, 2026.
Use the filters below to find and compare flights from Houston to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

HoustonOntario

HOU - ONT

HOUONT

Houston Hobby

Wed 5/20

9:00 pm-10:25 pm

Nonstop3h 25m

Ontario

Wed 6/3

1:55 pm-9:35 pm

1 stop5h 40m

$253

HoustonOntario

HOU - ONT

HOUONT

Houston Hobby

Sat 4/25

8:10 am-9:35 am

Nonstop3h 25m

Ontario

Sun 4/26

6:10 am-2:05 pm

1 stop5h 55m

$257

HoustonOntario

HOU - ONT

HOUONT

Houston Hobby

Wed 4/15

6:00 am-11:36 am

1 stop7h 36m

Ontario

Wed 4/22

12:49 pm-11:07 pm

1 stop8h 18m

$258

HoustonOntario

HOU - ONT

HOUONT

Houston Hobby

Thu 5/7

1:06 pm-11:34 pm

2 stops12h 28m

Ontario

Mon 5/11

12:08 pm-10:26 pm

1 stop8h 18m

$264

HoustonOntario

HOU - ONT

HOUONT

Houston Hobby

Fri 4/24

8:05 am-9:30 am

Nonstop3h 25m

Ontario

Sun 4/26

6:10 am-2:05 pm

1 stop5h 55m

$287

HoustonOntario

IAH - ONT

IAHONT

Houston George Bush Intcntl

Wed 4/22

8:14 pm-9:50 pm

Nonstop3h 36m

Ontario

Sat 4/25

6:05 am-11:15 am

Nonstop3h 10m

$305

HoustonOntario

IAH - ONT

IAHONT

Houston George Bush Intcntl

Tue 4/14

8:14 pm-9:50 pm

Nonstop3h 36m

Ontario

Sat 4/18

6:05 am-11:15 am

Nonstop3h 10m

$305

HoustonOntario

IAH - ONT

IAHONT

Houston George Bush Intcntl

Thu 6/4

10:05 pm-10:05 am

1 stop14h 00m

Ontario

Sat 6/13

3:34 pm-8:15 pm

1 stop26h 41m

$315

HoustonOntario

IAH - ONT

IAHONT

Houston George Bush Intcntl

Sat 4/25

7:00 am-12:38 pm

1 stop7h 38m

Ontario

Sat 5/2

6:00 am-11:11 am

Nonstop3h 11m

$316

HoustonOntario

HOU - ONT

HOUONT

Houston Hobby

Tue 5/5

3:10 pm-9:50 pm

2 stops8h 40m

Ontario

Tue 6/2

12:55 pm-5:55 pm

Nonstop3h 00m

$322

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/25

Showing 1-10 of 43 resultsSorted by cheapest first
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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 13, 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 March is currently the most expensive (average of $98). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from 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 27, 2026.

A simple way to save on the total cost of your ticket is to fly from Houston to Ontario at noon. If you’re flexible enough to do this you can expect to save up to 39% on your trip compared to booking a flight in the evening.

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 March 23, 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.

How much does it cost to fly round-trip from Houston to Ontario?

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 March 27, 2026.
See what other customers who have flown with Southwest,United Airlines, andAmerican 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
4,331 reviews

Overall

8.0

Food

7.0

Comfort

8.0

Entertainment

7.5

Boarding

8.1

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Southwest
8.0
Very good
4,331 reviews
Southwest
8.0
Very good
4,331 reviews

Overall

8.0

Food

7.0

Comfort

8.0

Entertainment

7.5

Boarding

8.1

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
United Airlines
7.4
Good
9,491 reviews
Southwest
8.0
Very good
4,331 reviews

Overall

8.0

Food

7.0

Comfort

8.0

Entertainment

7.5

Boarding

8.1

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
American Airlines
7.1
Good
11,507 reviews
Southwest
8.0
Very good
4,331 reviews

Overall

8.0

Food

7.0

Comfort

8.0

Entertainment

7.5

Boarding

8.1

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Frontier
5.7
Fair
3,013 reviews
Southwest
8.0
Very good
4,331 reviews

Overall

8.0

Food

7.0

Comfort

8.0

Entertainment

7.5

Boarding

8.1

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.

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 1 inbound flight 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 25m. Fly via Southwest, Delta, or United Airlines to get the fastest option. The distance between Houston and Ontario is about 1341 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 $62, 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 74% 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 $60 on Frontier. Other airlines that offer cheap prices include American Airlines from $84 and Southwest from $88 one-way.

  • What are the cheapest flights from Houston to Ontario?

    On average you can expect to pay $316 for a flight from Houston to Ontario. The cheapest flight overall is $118 while the most popular route, (Houston Hobby - Ontario) is currently priced at $113.

  • 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 March is currently the most expensive (average of $98). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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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 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 March 27, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$62Average$180FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$134Average$375FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$186Average$372FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$224Average$370FlexibilityNo cancel feeOn-time63%

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