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$79+ 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 9/20. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — HOU
Jun 2 — Jun 91
Mon 6/2
Mon 6/9
1 adult, Economy
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Cheapflights Tip: The best prices from Ontario to Houston are usually found in October or September, booked 88 days in advance, depart on a Tuesday or Monday and return on a Wednesday

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 May 28, 2025.

Round-trip from

$176
(Cheapflightsfares)

One-way from

$88
(Kiwi.com)

Popular in

February

Cheapest in

October

Average price

$242
From Ontario to Houston
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One-way flight from Ontario to Houston
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Highest demand for flights based on searches. 9% potential increase in price ($22 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($8 potential savings vs. average RT price).
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Average for round-trip flights in May 2025
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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 May 28, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 5/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/63:54 pmONT - IAH
Nonstop3h 24mFrontier
Mon 9/85:14 pmIAH - ONT
Nonstop3h 26mFrontier
Deal found 5/27$166
This Southwest deal was found by Cheapflights users on 5/27. 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.
Thu 8/146:20 amONT - HOU
Nonstop3h 10mSouthwest
Mon 8/187:50 amHOU - ONT
Nonstop3h 15mSouthwest
Deal found 5/27$217
This American Airlines deal was found by Cheapflights users on 5/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/236:17 amONT - IAH
1 stop5h 16mAmerican Airlines
Sat 8/232:45 pmIAH - ONT
1 stop5h 07mAmerican Airlines
Deal found 5/27$231
This Alaska Airlines deal was found by Cheapflights users on 5/27. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/37:22 pmONT - IAH
1 stop9h 02mAlaska Airlines
Tue 9/95:59 pmIAH - ONT
1 stop7h 54mAlaska Airlines
Deal found 5/27$236
This Delta deal was found by Cheapflights users on 5/28. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/2512:00 pmONT - IAH
1 stop9h 56mDelta
Tue 10/286:00 amIAH - ONT
1 stop7h 24mDelta
Deal found 5/28$237
This Delta deal was found by Cheapflights users on 5/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/67:05 amONT - HOU
1 stop8h 34mDelta
Tue 9/96:00 amHOU - ONT
1 stop7h 24mDelta
Deal found 5/27$237
This American Airlines deal was found by Cheapflights users on 5/28. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/811:59 pmONT - HOU
1 stop7h 45mAmerican Airlines
Fri 8/158:51 amHOU - ONT
1 stop5h 01mAmerican Airlines
Deal found 5/28$257
This United Airlines deal was found by Cheapflights users on 5/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/86:00 amONT - IAH
Nonstop3h 15mUnited Airlines
Sat 7/128:17 pmIAH - ONT
Nonstop3h 20mUnited Airlines
Deal found 5/27$287
This Kissandfly.com deal was found by Cheapflights users on 5/27. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/137:36 pmONT - IAH
2 stops11h 06mMultiple Airlines
Sun 6/155:12 pmIAH - ONT
1 stop5h 39mMultiple Airlines
Deal found 5/27$378

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 May 28, 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 - IAH

ONTIAH

Ontario

Sat 9/6

3:54 pm-9:18 pm

Nonstop3h 24m

Houston George Bush Intcntl

Mon 9/8

5:14 pm-6:40 pm

Nonstop3h 26m

$166

OntarioHouston

ONT - HOU

ONTHOU

Ontario

Thu 8/14

6:20 am-11:30 am

Nonstop3h 10m

Houston Hobby

Mon 8/18

7:50 am-9:05 am

Nonstop3h 15m

$217

OntarioHouston

ONT - IAH

ONTIAH

Ontario

Sat 8/23

6:17 am-1:33 pm

1 stop5h 16m

Houston George Bush Intcntl

Sat 8/23

2:45 pm-5:52 pm

1 stop5h 07m

$231

OntarioHouston

ONT - IAH

ONTIAH

Ontario

Wed 9/3

7:22 pm-6:24 am

1 stop9h 02m

Houston George Bush Intcntl

Tue 9/9

5:59 pm-11:53 pm

1 stop7h 54m

$236

OntarioHouston

ONT - IAH

ONTIAH

Ontario

Sat 10/25

12:00 pm-11:56 pm

1 stop9h 56m

Houston George Bush Intcntl

Tue 10/28

6:00 am-11:24 am

1 stop7h 24m

$237

OntarioHouston

ONT - HOU

ONTHOU

Ontario

Sat 9/6

7:05 am-5:39 pm

1 stop8h 34m

Houston Hobby

Tue 9/9

6:00 am-11:24 am

1 stop7h 24m

$237

OntarioHouston

ONT - HOU

ONTHOU

Ontario

Fri 8/8

11:59 pm-9:44 am

1 stop7h 45m

Houston Hobby

Fri 8/15

8:51 am-11:52 am

1 stop5h 01m

$257

OntarioHouston

ONT - IAH

ONTIAH

Ontario

Tue 7/8

6:00 am-11:15 am

Nonstop3h 15m

Houston George Bush Intcntl

Fri 7/11

8:17 pm-9:37 pm

Nonstop3h 20m

$287

OntarioHouston

ONT - IAH

ONTIAH

Ontario

Sat 8/16

7:30 am-4:50 pm

1 stop7h 20m

Houston George Bush Intcntl

Mon 8/18

6:00 am-1:27 pm

1 stop9h 27m

$290

OntarioHouston

ONT - IAH

ONTIAH

Ontario

Fri 6/13

7:36 pm-8:42 am

2 stops11h 06m

Houston George Bush Intcntl

Sun 6/15

5:12 pm-8:51 pm

1 stop5h 39m

$378

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/27

Showing 1-10 of 23 results
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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

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 May 23, 2025.

The best time to book flights from Ontario to Houston is 88 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, September is the cheapest month in which you can book a flight from Ontario to Houston (average of $230). Flying from Ontario to Houston in March is currently the most expensive (average of $332). 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 May 28, 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 56% on your trip compared to booking a flight at noon.

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 June 30, 2024.

Travelers seeking maximum savings on their Ontario to Houston flight should consider departing on Sunday evenings when fares are most often at their lowest. Saturday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Rainfall in Houston by month

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

In terms of precipitation, rainfall in Houston ranges from 3.2 - 5.9 inches per month. June is typically the wettest month, when rainfall can reach 5.9 in. February is typically the driest time to visit Houston when rainfall is around 3.2 in.

Temperature in Houston by month

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

If weather is an important factor for your trip to Houston, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 84.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 53.6 F).

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 May 28, 2025.
Read through reviews of airlines operating flights from Ontario to Houston, such as Alaska Airlines, Southwest and Delta. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Overall

8.0

Crew

8.5

Entertainment

7.1

Food

7.1

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Overall

8.0

Crew

8.5

Entertainment

7.1

Food

7.1

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Southwest
8.0
Very good
4,287 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Overall

8.0

Crew

8.5

Entertainment

7.1

Food

7.1

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,957 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Overall

8.0

Crew

8.5

Entertainment

7.1

Food

7.1

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.9
Good
2,460 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Overall

8.0

Crew

8.5

Entertainment

7.1

Food

7.1

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Qatar Airways
7.4
Good
3,580 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Overall

8.0

Crew

8.5

Entertainment

7.1

Food

7.1

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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 6 different airlines.

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

    Frontier, at $176, was found to be the cheapest airline from Ontario to Houston.Alternate airlines to your destination round-trip include Southwest and American Airlines. Frontier is priced at 23% 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?

    $88 is the cheapest one-way deal found within the past few days, from Frontier. You may also be able to find cheap deals on Southwest and Delta, with prices starting from $109 and $119, respectively.

  • What are the cheapest flights from Ontario to Houston?

    The cheapest flight price from Ontario to Houston is $140. On average you can expect to pay $313. The most popular route, (Ontario - Houston Hobby), can usually be booked for $176.

  • 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, September is the cheapest month in which you can book a flight from Ontario to Houston (average of $230). Flying from Ontario to Houston in March is currently the most expensive (average of $332). 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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Top 6 airlines flying from Ontario to Houston

Discover the top 6 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 May 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$74Average$167FlexibilityNo cancel feeOn-time65%
FrontierCheapest$77Average$171FlexibilityNo cancel feeOn-time62%
DeltaCheapest$173Average$337FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$188Average$390FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$192Average$402FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$258Average$395FlexibilityNo cancel feeOn-time63%

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