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$70+ Cheap flights from Ontario (ONT) to Houston

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 6/23. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — HOU
May 8 — May 151
Fri 5/8
Fri 5/15
1 adult, Economy
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Find cheap flights from Ontario to Houston with Cheapflights

1. Tell us where you want to go

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Cheapflights Tip: The best prices from Ontario to Houston are usually found in October or September, booked 51 days in advance, depart on a Tuesday or Wednesday and return on a Saturday

Cheap flight deals from Ontario to Houston

Cheapest flights from Ontario to Houston
Explore the most affordable flight options available from Ontario to Houston. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 8, 2026.

This Priceline deal was found by Cheapflights users on 4/7. 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.
Thu 4/2311:47 am
ONT
-
IAH
1 stop5h 49m
Frontier
Sat 5/166:45 am
IAH
-
ONT
Nonstop3h 35m
Frontier
Deal found 4/7$144
This Frontier deal was found by Cheapflights users on 4/7. 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.
Mon 4/2012:59 am
ONT
-
IAH
1 stop12h 08m
Frontier
Fri 5/13:01 pm
IAH
-
ONT
Nonstop3h 37m
Frontier
Deal found 4/7$149
This CheapOair deal was found by Cheapflights users on 4/6. 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.
Thu 4/238:26 am
ONT
-
IAH
Nonstop3h 20m
Frontier
Mon 4/276:45 am
IAH
-
ONT
1 stop19h 10m
Frontier
Deal found 4/6$150
This Super.com deal was found by Cheapflights users on 4/4. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/238:26 am
ONT
-
IAH
Nonstop3h 20m
Frontier
Sun 4/262:36 pm
IAH
-
ONT
Nonstop3h 41m
Frontier
Deal found 4/4$151
This Kiwi.com deal was found by Cheapflights users on 4/4. 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 4/198:21 am
ONT
-
IAH
Nonstop3h 20m
Frontier
Tue 4/214:02 pm
IAH
-
ONT
1 stop9h 53m
Frontier
Deal found 4/4$152
This Frontier deal was found by Cheapflights users on 4/4. 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.
Sun 4/198:21 am
ONT
-
IAH
Nonstop3h 20m
Frontier
Fri 4/243:01 pm
IAH
-
ONT
Nonstop3h 37m
Frontier
Deal found 4/4$153
This Frontier deal was found by Cheapflights users on 4/6. 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 5/288:06 pm
ONT
-
IAH
Nonstop3h 19m
Frontier
Fri 5/295:40 pm
IAH
-
ONT
1 stop8h 09m
Frontier
Deal found 4/6$154
This Frontier deal was found by Cheapflights users on 4/6. 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.
Mon 4/278:26 am
ONT
-
IAH
Nonstop3h 20m
Frontier
Wed 4/293:32 pm
IAH
-
ONT
1 stop10h 23m
Frontier
Deal found 4/6$155
This Kiwi.com deal was found by Cheapflights users on 4/3. 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.
Mon 4/2012:59 am
ONT
-
IAH
1 stop12h 08m
Frontier
Sat 4/257:15 am
IAH
-
ONT
1 stop18h 40m
Frontier
Deal found 4/3$156
This Kiwi.com deal was found by Cheapflights users on 4/5. 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.
Mon 5/188:06 pm
ONT
-
IAH
Nonstop3h 19m
Frontier
Wed 5/2012:06 pm
IAH
-
ONT
2 stops13h 43m
Frontier
Deal found 4/5$157
This Frontier deal was found by Cheapflights users on 4/6. 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.
Wed 5/138:06 pm
ONT
-
IAH
Nonstop3h 19m
Frontier
Sat 5/235:40 pm
IAH
-
ONT
1 stop8h 09m
Frontier
Deal found 4/6$158
This Southwest deal was found by Cheapflights users on 4/5. 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 5/512:55 pm
ONT
-
HOU
Nonstop3h 00m
Southwest
Tue 5/129:00 pm
HOU
-
ONT
Nonstop3h 25m
Southwest
Deal found 4/5$197

Find flight deals from Ontario to Houston

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Houston (HO1). 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 April 8, 2026.

Round-trip from

$149
(Frontier)

One-way from

$70
(Super.com)

Popular in

March

Cheapest in

October

Average price

$247
From Ontario to Houston
Search Deals
One-way flight from Ontario to Houston
Search Deals
Highest demand for flights based on searches. 15% potential increase in price ($51 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($11 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Houston 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 April 8, 2026.
Use the filters below to find and compare flights from Ontario to Houston that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioHouston

ONT - HOU

ONTHOU

Ontario

Sat 5/30

11:50 am-4:55 pm

Nonstop3h 05m

Houston Hobby

Wed 6/3

9:00 pm-10:25 pm

Nonstop3h 25m

$197
Quickest round-trip

OntarioHouston

ONT - HOU

ONTHOU

Ontario

Mon 5/18

1:50 pm-6:50 pm

Nonstop3h 00m

Houston Hobby

Wed 5/20

9:00 pm-10:25 pm

Nonstop3h 25m

$212

OntarioHouston

ONT - HOU

ONTHOU

Ontario

Sat 5/9

11:50 am-4:55 pm

Nonstop3h 05m

Houston Hobby

Mon 5/11

6:25 pm-10:40 pm

1 stop6h 15m

$222

OntarioHouston

ONT - IAH

ONTIAH

Ontario

Thu 5/28

1:29 pm-10:17 pm

1 stop6h 48m

Houston George Bush Intcntl

Tue 6/2

7:59 pm-11:34 pm

1 stop5h 35m

$232

OntarioHouston

ONT - IAH

ONTIAH

Ontario

Thu 5/28

1:29 pm-10:17 pm

1 stop6h 48m

Houston George Bush Intcntl

Wed 6/3

2:45 pm-11:34 pm

2 stops10h 49m

$237

OntarioHouston

ONT - HOU

ONTHOU

Ontario

Thu 6/4

5:30 am-12:55 pm

1 stop5h 25m

Houston Hobby

Thu 6/4

3:35 pm-9:05 pm

1 stop7h 30m

$247

OntarioHouston

ONT - HOU

ONTHOU

Ontario

Thu 5/7

8:00 am-3:45 pm

1 stop5h 45m

Houston Hobby

Thu 5/7

6:25 pm-10:40 pm

1 stop6h 15m

$247

OntarioHouston

ONT - HOU

ONTHOU

Ontario

Sat 5/23

2:50 pm-9:20 pm

1 stop4h 30m

Houston Hobby

Wed 5/27

9:00 pm-10:25 pm

Nonstop3h 25m

$267

OntarioHouston

ONT - IAH

ONTIAH

Ontario

Sat 5/2

6:00 am-11:11 am

Nonstop3h 11m

Houston George Bush Intcntl

Sun 5/3

8:22 pm-9:58 pm

Nonstop3h 36m

$277

OntarioHouston

ONT - IAH

ONTIAH

Ontario

Thu 6/4

9:50 am-11:55 pm

2 stops12h 05m

Houston George Bush Intcntl

Mon 6/8

4:00 pm-11:45 pm

2 stops9h 45m

$278

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/3

Showing 1-10 of 42 resultsSorted by cheapest first
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Best time to book a flight from Ontario to Houston

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

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

Use this chart to determine the optimal time to book a round-trip flight from Ontario to Houston. Price data was last updated on April 3, 2026.

The best time to book flights from Ontario to Houston is 51 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 Ontario to Houston?

Currently, December is the cheapest month in which you can book a flight from Ontario to Houston (average of $57). Flying from Ontario to Houston in March is currently the most expensive (average of $108). 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 ONT to HOU?

Find hourly flight availability from Ontario to Houston. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 8, 2026.

A simple way to save on the total cost of your ticket is to fly from Ontario to Houston in the evening. If you’re flexible enough to do this you can expect to save up to 48% on your trip compared to booking a flight in the morning.

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

How often are flights from Ontario to Houston delayed?

About 11% of weekly flights between Ontario and Houston have experienced delays in the past year, with the average delay time being 133 minutes.

What is the most punctual flight time for Ontario to Houston flights?

Historically, flights departing in the morning are less likely to be delayed, whereas flights leaving at night tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Saturday tends to have the lowest number of delays on this route, whereas Monday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on Ontario to Houston flights?

Over the last year, United Airlines have had the lowest number of delays on this route, with just 7% of flights being delayed.

The best insider tips for Ontario to Houston 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 Ontario to Houston 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 Houston

Get insights into the airlines that provide service to Houston. 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 Houston. Reviews last updated April 8, 2026.
Read through reviews of airlines operating flights from Ontario to Houston, such as Southwest,United Airlines, andAmerican Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,337 reviews

Crew

8.6

Boarding

8.1

Entertainment

7.5

Food

7.0

Overall

8.0

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.
Southwest
8.0
Very good
4,337 reviews
Southwest
8.0
Very good
4,337 reviews

Crew

8.6

Boarding

8.1

Entertainment

7.5

Food

7.0

Overall

8.0

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.
United Airlines
7.4
Good
9,550 reviews
Southwest
8.0
Very good
4,337 reviews

Crew

8.6

Boarding

8.1

Entertainment

7.5

Food

7.0

Overall

8.0

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.
American Airlines
7.1
Good
11,552 reviews
Southwest
8.0
Very good
4,337 reviews

Crew

8.6

Boarding

8.1

Entertainment

7.5

Food

7.0

Overall

8.0

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.
Frontier
5.7
Fair
3,000 reviews
Southwest
8.0
Very good
4,337 reviews

Crew

8.6

Boarding

8.1

Entertainment

7.5

Food

7.0

Overall

8.0

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Houston. 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 from for flights from Ontario to Houston?

    Located just 3.1 mi from the city center, Ontario is the airport most travelers will use when flying to Houston from Ontario. Booking flights from Ontario (ONT) to Houston should be relatively easy as there are 0 daily outbound flights to Houston from 4 different airlines.

  • How long is the flight from Ontario to Houston?

    There are many flights that can get you from Ontario to Houston in 3h 05m. Fly via Southwest, Delta, or United Airlines to get the fastest option. The distance from Ontario to Houston is about 1341 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    Frontier, at $65, was found to be the cheapest airline from Ontario to Houston.Alternate airlines to your destination round-trip include United Airlines and Southwest. Frontier is priced at 77% lower than the current average price of a flight leaving 3 months from now.

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

    $49 is the cheapest one-way deal found within the past few days, from Frontier. You may also be able to find cheap deals on United Airlines and American Airlines, with prices starting from $72 and $104, respectively.

  • What are the cheapest flights from Ontario to Houston?

    The cheapest flight price from Ontario to Houston is $147. On average you can expect to pay $390. The most popular route, (Ontario - Houston Hobby), can usually be booked for $97.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Ontario to Houston 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 Ontario to Houston?

    Currently, December is the cheapest month in which you can book a flight from Ontario to Houston (average of $57). Flying from Ontario to Houston in March is currently the most expensive (average of $108). 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 Ontario to Houston

See prices for flight routes from nearby airports that may be better suited for you.
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Top 4 airlines flying from Ontario to Houston

Discover the top 4 airlines that operate flights from Ontario to Houston. 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 April 8, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$65Average$203FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$168Average$362FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$194Average$393FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$210Average$405FlexibilityNo cancel feeOn-time71%

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