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$48+ 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 4/12. Fares are subject to change and may not be available on all flights or dates of travel.
HOU — ONT
Feb 25 — Mar 41
Tue 2/25
Tue 3/4
1 adult, Economy
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The best prices from Houston to Ontario are usually found in February or September, booked 55 days in advance, depart on a Wednesday or Monday and return on a Tuesday

Cheap 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 February 20, 2025.

Round-trip from

$82
(Frontier)

One-way from

$48
(Kiwi.com)

Popular in

November

Cheapest in

February

Average price

$140
From Houston to Ontario
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One-way flight from Houston to Ontario
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Highest demand for flights based on searches. 17% potential increase in price ($41 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($7 potential savings vs. average RT price).
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Average for round-trip flights in February 2025
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Find 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 February 20, 2025.

This Frontier deal was found by Cheapflights users on 2/18. 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 3/1612:22 pmIAH - ONT
Nonstop3h 36mFrontier
Wed 3/194:04 pmONT - IAH
Nonstop3h 17mFrontier
Deal found 2/18$82
This Delta deal was found by Cheapflights users on 2/20. 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.
Tue 4/111:52 amIAH - ONT
1 stop6h 42mDelta
Wed 4/26:00 amONT - IAH
1 stop7h 20mDelta
Deal found 2/20$237
This FlightHub deal was found by Cheapflights users on 2/19. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/158:14 pmHOU - ONT
1 stop15h 17mFrontier
Tue 3/1812:59 amONT - HOU
1 stop6h 37mFrontier
Deal found 2/19$292
This American Airlines deal was found by Cheapflights users on 2/20. 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.
Tue 3/118:17 pmHOU - ONT
1 stop5h 37mAmerican Airlines
Fri 3/1411:59 pmONT - HOU
1 stop6h 39mAmerican Airlines
Deal found 2/20$322
This Southwest deal was found by Cheapflights users on 2/20. 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.
Fri 4/258:35 amHOU - ONT
Nonstop3h 30mSouthwest
Sun 4/272:35 pmONT - HOU
Nonstop3h 00mSouthwest
Deal found 2/20$358
This Delta deal was found by Cheapflights users on 2/20. 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.
Tue 4/222:45 pmHOU - ONT
1 stop9h 51mDelta
Sat 4/267:00 amONT - HOU
1 stop8h 49mDelta
Deal found 2/20$403

Find flights from Houston to Ontario within your budget

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 February 20, 2025.

Fly from

Houston

Fly to

Ontario

Route

Depart

Return

Price

HoustonOntario

IAH - ONT

IAHONT

Houston George Bush Intcntl

Fri 3/14

12:07 pm-1:43 pm

Nonstop3h 36m

Ontario

Wed 3/26

4:04 pm-9:21 pm

Nonstop3h 17m

$82

HoustonOntario

IAH - ONT

IAHONT

Houston George Bush Intcntl

Tue 4/1

6:10 am-4:34 pm

2 stops12h 24m

Ontario

Wed 4/2

12:46 pm-11:59 pm

1 stop9h 13m

$242

HoustonOntario

IAH - ONT

IAHONT

Houston George Bush Intcntl

Tue 4/1

6:00 am-11:59 am

2 stops7h 59m

Ontario

Wed 4/2

12:50 pm-10:55 pm

2 stops8h 05m

$247

HoustonOntario

HOU - ONT

HOUONT

Houston Hobby

Sat 3/15

8:14 pm-9:31 am

1 stop15h 17m

Ontario

Tue 3/18

12:59 am-9:36 am

1 stop6h 37m

$292

HoustonOntario

HOU - ONT

HOUONT

Houston Hobby

Tue 3/11

8:17 pm-11:54 pm

1 stop5h 37m

Ontario

Fri 3/14

11:59 pm-8:38 am

1 stop6h 39m

$322

HoustonOntario

HOU - ONT

HOUONT

Houston Hobby

Fri 4/25

8:35 am-10:05 am

Nonstop3h 30m

Ontario

Sun 4/27

2:35 pm-7:35 pm

Nonstop3h 00m

$358

HoustonOntario

HOU - ONT

HOUONT

Houston Hobby

Tue 4/22

2:45 pm-10:36 pm

1 stop9h 51m

Ontario

Sat 4/26

7:00 am-5:49 pm

1 stop8h 49m

$403

HoustonOntario

IAH - ONT

IAHONT

Houston George Bush Intcntl

Sat 4/12

11:59 am-1:32 pm

Nonstop3h 33m

$48

HoustonOntario

HOU - ONT

HOUONT

Houston Hobby

Sat 4/12

12:27 pm-5:57 pm

1 stop7h 30m

$83

HoustonOntario

IAH - ONT

IAHONT

Houston George Bush Intcntl

Tue 4/22

8:20 pm-9:58 pm

Nonstop3h 38m

$109

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/19

Showing 1-10 of 17 results
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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.

Travel insights for flights from Houston to Ontario

Get recent, data-driven insights about flights from Houston to Ontario including ideal travel times, pricing trends, and more.

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 February 14, 2025.

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, August is the cheapest month in which you can book a flight from Houston to Ontario (average of $246). Flying from Houston to Ontario in March is currently the most expensive (average of $315). 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 February 20, 2025.

A simple way to save on the total cost of your ticket is to fly from Houston to Ontario in the evening. If you’re flexible enough to do this you can expect to save up to 55% 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 October 27, 2024.

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

Rainfall in Ontario by month

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

In terms of precipitation, rainfall in Ontario ranges from 0.1 - 3.4 inches per month. February is typically the wettest month, when rainfall can reach 3.4 in. June is typically the driest time to visit Ontario when rainfall is around 0.1 in.

Temperature in Ontario by month

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

If weather is an important factor for your trip to Ontario, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 53.6 F).

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 February 20, 2025.
See what other customers who have flown with Southwest, Alaska Airlines and Delta 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
8.1
Very good
4,411 reviews

Entertainment

7.6

Overall

8.1

Food

7.1

Crew

8.7

Boarding

8.2

Comfort

8.1

Reviews

1 / 20

8.0
Excellent

Christine,Aug 2024

DEN - LGB

No issues. I needed pre boarding and I was able to get it without issue

Southwest
8.1
Very good
4,411 reviews
Southwest
8.1
Very good
4,411 reviews

Entertainment

7.6

Overall

8.1

Food

7.1

Crew

8.7

Boarding

8.2

Comfort

8.1

Reviews

1 / 20

8.0
Excellent

Christine,Aug 2024

DEN - LGB

No issues. I needed pre boarding and I was able to get it without issue

Alaska Airlines
8.0
Very good
9,692 reviews
Southwest
8.1
Very good
4,411 reviews

Entertainment

7.6

Overall

8.1

Food

7.1

Crew

8.7

Boarding

8.2

Comfort

8.1

Reviews

1 / 20

8.0
Excellent

Christine,Aug 2024

DEN - LGB

No issues. I needed pre boarding and I was able to get it without issue

Delta
8.0
Very good
8,220 reviews
Southwest
8.1
Very good
4,411 reviews

Entertainment

7.6

Overall

8.1

Food

7.1

Crew

8.7

Boarding

8.2

Comfort

8.1

Reviews

1 / 20

8.0
Excellent

Christine,Aug 2024

DEN - LGB

No issues. I needed pre boarding and I was able to get it without issue

United Airlines
7.4
Good
8,766 reviews
Southwest
8.1
Very good
4,411 reviews

Entertainment

7.6

Overall

8.1

Food

7.1

Crew

8.7

Boarding

8.2

Comfort

8.1

Reviews

1 / 20

8.0
Excellent

Christine,Aug 2024

DEN - LGB

No issues. I needed pre boarding and I was able to get it without issue

American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
4,411 reviews

Entertainment

7.6

Overall

8.1

Food

7.1

Crew

8.7

Boarding

8.2

Comfort

8.1

Reviews

1 / 20

8.0
Excellent

Christine,Aug 2024

DEN - LGB

No issues. I needed pre boarding and I was able to get it without issue

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. 6 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.

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

    Currently priced at $82, 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 Delta and American Airlines - these airlines can fly you to your destination from $237 and $237, respectively. Frontier is currently priced 59% 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 $48 on Frontier. Other airlines that offer cheap prices include United Airlines from $109 and Delta from $119 one-way.

  • What are the cheapest flights from Houston to Ontario?

    On average you can expect to pay $335 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 $58.

  • 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, August is the cheapest month in which you can book a flight from Houston to Ontario (average of $246). Flying from Houston to Ontario in March is currently the most expensive (average of $315). 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.

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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 6 airlines flying from Houston to Ontario

Discover the top 6 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 February 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$88Average$175FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$93Average$189FlexibilityNo cancel feeOn-time65%
United AirlinesCheapest$179Average$366FlexibilityNo cancel feeOn-time69%
DeltaCheapest$193Average$306FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$247Average$379FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$267Average$409FlexibilityNo cancel feeOn-time63%
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