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$57+ 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 12/8. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — HOU
dic. 26 — ene. 21
vie. 12/26
vie. 1/2
1 adult, Economy
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Cheapflights Tip: The best prices from Ontario to Houston are usually found in March or April, booked 25 days in advance, depart on a Tuesday or Wednesday and return on a Tuesday

Find 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 noviembre 26, 2025.

This Kiwi.com deal was found by Cheapflights users on 11/25. 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.
dom. 12/72:59 pmONT - IAH
Nonstop3h 22mFrontier
lun. 12/82:51 pmIAH - ONT
Nonstop3h 42mFrontier
Deal found 11/25$117
This Super.com deal was found by Cheapflights users on 11/26. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 12/52:05 pmONT - IAH
Nonstop3h 22mFrontier
dom. 12/72:51 pmIAH - ONT
Nonstop3h 42mFrontier
Deal found 11/26$119
This Kiwi.com deal was found by Cheapflights users on 11/26. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 12/82:59 pmONT - IAH
Nonstop3h 22mFrontier
vie. 12/122:51 pmIAH - ONT
Nonstop3h 42mFrontier
Deal found 11/26$127
This CheapOair deal was found by Cheapflights users on 11/26. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 12/72:59 pmONT - IAH
Nonstop3h 22mFrontier
vie. 12/122:51 pmIAH - ONT
Nonstop3h 42mFrontier
Deal found 11/26$128
This Kiwi.com deal was found by Cheapflights users on 11/24. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 12/82:59 pmONT - IAH
Nonstop3h 22mFrontier
jue. 12/112:52 pmIAH - ONT
1 stop8h 25mFrontier
Deal found 11/24$147
This Kiwi.com deal was found by Cheapflights users on 11/25. 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.
dom. 12/72:59 pmONT - IAH
Nonstop3h 22mFrontier
jue. 12/112:52 pmIAH - ONT
1 stop8h 25mFrontier
Deal found 11/25$151
This Frontier deal was found by Cheapflights users on 11/25. 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.
mié. 12/36:15 amONT - IAH
1 stop12h 19mFrontier
lun. 12/82:51 pmIAH - ONT
Nonstop3h 42mFrontier
Deal found 11/25$152
This Delta deal was found by Cheapflights users on 11/24. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 12/1410:25 pmONT - HOU
1 stop9h 09mDelta
mar. 12/162:32 pmHOU - ONT
1 stop10h 32mDelta
Deal found 11/24$250
This American Airlines deal was found by Cheapflights users on 11/25. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 12/910:47 amONT - HOU
1 stop5h 12mAmerican Airlines
jue. 12/118:19 pmHOU - ONT
1 stop5h 36mAmerican Airlines
Deal found 11/25$283
This American Airlines deal was found by Cheapflights users on 11/24. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 12/112:56 pmONT - HOU
1 stop7h 02mAmerican Airlines
lun. 12/156:36 pmHOU - ONT
1 stop5h 52mAmerican Airlines
Deal found 11/24$307
This American Airlines deal was found by Cheapflights users on 11/26. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 12/1212:46 pmONT - HOU
1 stop5h 32mAmerican Airlines
dom. 12/146:29 pmHOU - ONT
1 stop7h 26mAmerican Airlines
Deal found 11/26$320
This American Airlines deal was found by Cheapflights users on 11/23. 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.
jue. 12/1111:59 pmONT - HOU
1 stop6h 33mAmerican Airlines
jue. 12/1810:13 amHOU - ONT
1 stop5h 39mAmerican Airlines
Deal found 11/23$331

Cheap 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 noviembre 26, 2025.

Round-trip from

$117
(Kiwi.com)

One-way from

$57
(CheapOair)

Popular in

November

Cheapest in

March

Average price

$317
From Ontario to Houston
Search Deals
One-way flight from Ontario to Houston
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($33 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($7 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
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 noviembre 26, 2025.
Use the filters below to find and compare flights from Ontario to Houston that are best for you.

Fly from

Ontario

Fly to

Houston

Route

Depart

Return

Price

OntarioHouston

ONT - HOU

ONTHOU

Ontario

mar. 2/17

12:55 pm-5:55 pm

Nonstop3h 00m

Houston Hobby

jue. 2/19

8:00 am-9:35 am

Nonstop3h 35m

$303

OntarioHouston

ONT - HOU

ONTHOU

Ontario

sáb. 1/24

12:41 pm-10:33 pm

1 stop7h 52m

Houston Hobby

jue. 1/29

5:45 am-11:31 am

1 stop7h 46m

$323

OntarioHouston

ONT - HOU

ONTHOU

Ontario

mié. 3/18

1:20 pm-6:15 pm

Nonstop2h 55m

Houston Hobby

lun. 3/30

8:55 pm-10:30 pm

Nonstop3h 35m

$333

OntarioHouston

ONT - HOU

ONTHOU

Ontario

vie. 1/16

12:55 pm-5:55 pm

Nonstop3h 00m

Houston Hobby

mar. 1/20

3:35 pm-5:10 pm

Nonstop3h 35m

$341

OntarioHouston

ONT - HOU

ONTHOU

Ontario

mié. 1/7

5:15 am-10:15 am

Nonstop3h 00m

Houston Hobby

dom. 1/11

7:45 am-9:20 am

Nonstop3h 35m

$341

OntarioHouston

ONT - IAH

ONTIAH

Ontario

mié. 12/10

6:00 am-11:06 am

Nonstop3h 06m

Houston George Bush Intcntl

lun. 12/15

8:18 pm-9:49 pm

Nonstop3h 31m

$348

OntarioHouston

ONT - IAH

ONTIAH

Ontario

mié. 4/22

7:00 am-4:32 pm

1 stop7h 32m

Houston George Bush Intcntl

mar. 4/28

11:55 am-4:14 pm

1 stop6h 19m

$353

OntarioHouston

ONT - HOU

ONTHOU

Ontario

sáb. 12/13

10:47 am-5:59 pm

1 stop5h 12m

Houston Hobby

dom. 12/14

5:44 am-11:53 am

1 stop8h 09m

$355

OntarioHouston

ONT - HOU

ONTHOU

Ontario

sáb. 12/6

7:05 am-5:33 pm

1 stop8h 28m

Houston Hobby

mar. 12/9

2:32 pm-11:04 pm

1 stop10h 32m

$355

OntarioHouston

ONT - HOU

ONTHOU

Ontario

dom. 12/7

10:25 pm-9:34 am

1 stop9h 09m

Houston Hobby

mié. 12/10

2:32 pm-11:04 pm

1 stop10h 32m

$355

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/26

Showing 1-10 of 40 results
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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 November 21, 2025.

The best time to book flights from Ontario to Houston is 25 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, January is the cheapest month in which you can book a flight from Ontario to Houston (average of $58). Flying from Ontario to Houston in August is currently the most expensive (average of $100). 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 noviembre 26, 2025.

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 60% on your trip compared to booking a flight in the morning.

What is the cheapest day to fly from Ontario to Houston?

Use this chart to determine the cheapest time to fly round-trip from Ontario to Houston. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Ontario to Houston flight should consider departing on Tuesday afternoons when fares are most often at their lowest. Sunday mornings 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 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 136 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 in the early afternoon 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 Wednesday 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, Atlas Air have had the lowest number of delays on this route, with no flights being classified as delayed.

The best insider tips for Ontario to Houston 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 Ontario to Houston trip
Airlines
Frontier

Frontier's UpFront Plus guarantees an empty middle seat for extra comfort.


Frontier offers Zone 1 boarding with carry-on purchase or special fare bundle.

Read more about Frontierby Marisa Garcia
United Airlines

Basic Economy allows a personal item only; no carry-on bags unless exceptions apply.


Economy Plus offers extra legroom seats towards the front of the economy cabin.

Read more about United Airlinesby Harriet Baskas
Airports
ONT

For a smooth security experience, ONT's checkpoints are quicker than LAX, especially during weekday business travel.

Read more about ONTby Bill Fink
IAH

For a quick city transfer, use Uber or Lyft from Terminals A, B, and C at IAH, taking about 25 minutes to downtown Houston.

Read more about IAHby Evie Carrick
HOU

HOU is easy to navigate with congestion-free roadways, making pickups and drop-offs convenient even during peak times.

Read more about HOUby Scott Laird
Our travel experts
Marisa Garcia

Marisa Garcia

Expert on Frontier

Marisa Garcia

Marisa Garcia

Marisa knows planes inside and out, spending 16 years working on aircraft in hangars at airports around the world. She is an aviation industry expert, specialized in airline interiors and regulations. Ten years ago, she pivoted to journalism. She shares her insights in leading aviation, travel, and business publications and on her site FlightChic.

Read more
Harriet Baskas

Harriet Baskas

Expert on United Airlines

Harriet Baskas

Harriet Baskas

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Read more
Evie Carrick

Evie Carrick

Expert on IAH

Evie Carrick

Evie Carrick

Evie Carrick is a writer and editor who has lived in five countries and traveled to over 50, with extensive experience flying around the world. She was born in Colorado, but has spent time flying to both coasts to visit family. She writes regularly for Travel + Leisure, BuzzFeed, and SKI and recently published seven travel journals with Simon & Schuster.

Read more
Bill Fink

Bill Fink

Expert on ONT

Bill Fink

Bill Fink

Bill is an award-winning travel writer with extensive credits covering airlines and the aviation industry for publications including AARP, AFAR, The Points Guy and Yahoo. Based in Portland, Oregon, Bill has traveled to more than 75 countries - and been late for his flight in most of them. He once achieved top-level frequent flier status for all of American, Delta and United Airlines during a single year.

Read more
Scott Laird

Scott Laird

Expert on HOU

Scott Laird

Scott Laird

Originally from Anchorage, Alaska, Scott is a frequent contributor to Fodor’s Travel Guide, Conde Nast Traveler, TravelAge West, and TravelPulse. He holds a Bachelor of Science in Organizational Management from Alaska Pacific University and a Master of Science in Airline Management from Embry-Riddle Aeronautical University, and has worked in the airline and hotel industries and as a travel consultant.

Read more

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 noviembre 26, 2025.
Read through reviews of airlines operating flights from Ontario to Houston, such as Southwest, United Airlines, and American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,254 reviews

Food

7.0

Crew

8.6

Overall

8.0

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Southwest
8.0
Very good
4,254 reviews
Southwest
8.0
Very good
4,254 reviews

Food

7.0

Crew

8.6

Overall

8.0

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
United Airlines
7.4
Good
9,046 reviews
Southwest
8.0
Very good
4,254 reviews

Food

7.0

Crew

8.6

Overall

8.0

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
American Airlines
7.2
Good
11,038 reviews
Southwest
8.0
Very good
4,254 reviews

Food

7.0

Crew

8.6

Overall

8.0

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Spirit Airlines
6.3
Okay
8,158 reviews
Southwest
8.0
Very good
4,254 reviews

Food

7.0

Crew

8.6

Overall

8.0

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Frontier
5.8
Fair
3,099 reviews
Southwest
8.0
Very good
4,254 reviews

Food

7.0

Crew

8.6

Overall

8.0

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

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 is 1 daily outbound flight to Houston from 5 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. 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?

    Spirit Airlines, at $53, was found to be the cheapest airline from Ontario to Houston.Alternate airlines to your destination round-trip include Frontier and United Airlines. Spirit Airlines is priced at 78% 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?

    $137 is the cheapest one-way deal found within the past few days, from Southwest. You may also be able to find cheap deals on Delta and Alaska Airlines, with prices starting from $147 and $159, respectively.

  • What are the cheapest flights from Ontario to Houston?

    The cheapest flight price from Ontario to Houston is $178. On average you can expect to pay $412. The most popular route, (Ontario - Houston Hobby), can usually be booked for $169.

  • 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, January is the cheapest month in which you can book a flight from Ontario to Houston (average of $58). Flying from Ontario to Houston in August is currently the most expensive (average of $100). 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 5 airlines flying from Ontario to Houston

Discover the top 5 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 noviembre 26, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$53Average$180FlexibilityNo cancel feeOn-time65%
FrontierCheapest$73Average$179FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$170Average$380FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$188Average$401FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$192Average$390FlexibilityNo cancel feeOn-time63%

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