$96 Cheap Flights from Houston (IAH) to Ontario (ONT)

View $96 flight on Fri, Sep 26, 2025Opens in a new window

Popular airlines from George Bush Intercontinental Airport (IAH) to Los Angeles - Ontario Intl. Airport (ONT)

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Cheap Flights from Houston to Ontario (IAH-ONT)

Prices were available within the past 7 days and start at $96 for one-way flights and $141 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Fri, Oct 10 - Thu, Oct 16
IAH
Houston
ONT
Ontario
$141 Roundtrip, found 5 days ago
$141
Roundtrip
found 5 days ago
Select Frontier Airlines flight, departing Fri, Oct 10 from Houston to Ontario, returning Thu, Oct 16, priced at $141 found 5 days ago
Frontier Airlines
Fri, Aug 8 - Fri, Aug 22
IAH
Houston
ONT
Ontario
$158 Roundtrip, found 5 days ago
$158
Roundtrip
found 5 days ago
Select Frontier Airlines flight, departing Fri, Aug 8 from Houston to Ontario, returning Fri, Aug 22, priced at $158 found 5 days ago
Frontier Airlines
Fri, Aug 1 - Mon, Aug 4
IAH
Houston
ONT
Ontario
$160 Roundtrip, found 1 hour ago
$160
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Fri, Aug 1 from Houston to Ontario, returning Mon, Aug 4, priced at $160 found 1 hour ago
Frontier Airlines
Fri, Oct 10 - Thu, Oct 16
IAH
Houston
ONT
Ontario
$161 Roundtrip, found 5 days ago
$161
Roundtrip
found 5 days ago
Select Frontier Airlines flight, departing Fri, Oct 10 from Houston to Ontario, returning Thu, Oct 16, priced at $161 found 5 days ago
Frontier Airlines
Fri, Aug 1 - Thu, Sep 4
IAH
Houston
ONT
Ontario
$168 Roundtrip, found 5 hours ago
$168
Roundtrip
found 5 hours ago
Select Frontier Airlines flight, departing Fri, Aug 1 from Houston to Ontario, returning Thu, Sep 4, priced at $168 found 5 hours ago
Frontier Airlines
Mon, Aug 18 - Mon, Aug 25
IAH
Houston
ONT
Ontario
$169 Roundtrip, found 5 hours ago
$169
Roundtrip
found 5 hours ago
Select Frontier Airlines flight, departing Mon, Aug 18 from Houston to Ontario, returning Mon, Aug 25, priced at $169 found 5 hours ago
United
Fri, Sep 26 - Sun, Oct 5
IAH
Houston
ONT
Ontario
$191 Roundtrip, just found
$191
Roundtrip
just found
Select United flight, departing Fri, Sep 26 from Houston to Ontario, returning Sun, Oct 5, priced at $191 just found
Alaska Airlines
Tue, Aug 19 - Thu, Sep 4
IAH
Houston
ONT
Ontario
$203 Roundtrip, just found
$203
Roundtrip
just found
Select Alaska Airlines flight, departing Tue, Aug 19 from Houston to Ontario, returning Thu, Sep 4, priced at $203 just found
Hawaiian Airlines
Mon, Sep 29 - Mon, Oct 6
IAH
Houston
ONT
Ontario
$210 Roundtrip, just found
$210
Roundtrip
just found
Select Hawaiian Airlines flight, departing Mon, Sep 29 from Houston to Ontario, returning Mon, Oct 6, priced at $210 just found
American Airlines
Sat, Oct 18 - Tue, Oct 21
IAH
Houston
ONT
Ontario
$211 Roundtrip, just found
$211
Roundtrip
just found
Select American Airlines flight, departing Sat, Oct 18 from Houston to Ontario, returning Tue, Oct 21, priced at $211 just found

Find the cheapest month to fly from Houston (IAH) to Ontario (ONT)

March is typically the cheapest month to fly

From $69 - $446 per traveler.

Graph displaying average flight prices per month

Flights from Houston (IAH) to Ontario (ONT)
Origin airport
George Bush Intercontinental
Destination airport
Los Angeles - Ontario Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, Hawaiian Airlines, United
Roundtrip price
$141
Distance
1330 mi
Average flight time
3 hours 17 mins

Houston to Ontario Flights

The cheapest times to fly from Houston to Ontario

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Houston to Ontario are during the month of October. You can find some of the cheapest flights from Houston to Ontario with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Houston to Ontario

Sunday is one of the best days to book for cheap flights from Houston to Ontario: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Houston to Ontario

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Houston to Ontario in 2025. You can also book with separate airlines for your outbound and return journeys, from $96 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Houston to Ontario flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Houston to Ontario airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from George Bush Intercontinental Airport (IAH) to Los Angeles - Ontario Intl. Airport (ONT) cost?
Cheap round-trip flights from George Bush Intercontinental Airport (IAH) to Los Angeles - Ontario Intl. Airport (ONT) start at $125. This information is based on the cheapest price found on Expedia for this return journey departing within the next three months. This airfare is for a Frontier Airlines and Spirit Airlines flight leaving IAH on August 4 2025 and touching down at ONT. The price was last updated on July 11 2025 and has not changed since.
What is the cheapest month to fly from IAH to ONT?
The cheapest flights from IAH to ONT are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
Which airlines fly direct from George Bush Intercontinental Airport (IAH) to Los Angeles - Ontario Intl. Airport (ONT)?
You can travel nonstop from George Bush Intercontinental Airport (IAH) to Los Angeles - Ontario Intl. Airport (ONT) on a United Airlines flight.
What is the cheapest airline that flies from IAH to ONT?
Currently, the cheapest airline operating one-way flights from IAH to ONT is Frontier Airlines. You can jet off on this route from $69. This fare is based on the lowest price found on Expedia departing within the next three months. The flight takes off from IAH on October 5 2025. Prices were last updated on July 11 2025 and have not changed since.
How many flights per day from George Bush Intercontinental Airport (IAH) to Los Angeles - Ontario Intl. Airport (ONT)?
On average, you'll only find 1 nonstop flight operating from George Bush Intercontinental Airport (IAH) to Los Angeles - Ontario Intl. Airport (ONT) per day. If this doesn't suit your schedule, think about flights with a layover. Simply filter your search results on Expedia to include one or more stops to find the next best option.
What are the most popular departure times for flights from George Bush Intercontinental Airport (IAH) to Los Angeles - Ontario Intl. Airport (ONT)?
More travelers fly between IAH and ONT at 8 PM than at any other time of day. Looking for a quieter experience? Consider flying outside peak hours and you could save on your ticket as well.
What day of the week has the most flights from IAH to ONT?
Friday has the most flights from George Bush Intercontinental Airport (IAH) to Los Angeles - Ontario Intl. Airport (ONT). Consider jetting off on this day and you'll have the best chance of finding a departure that fits your plans.
What is the earliest flight from George Bush Intercontinental Airport (IAH) to Los Angeles - Ontario Intl. Airport (ONT)?
The first flight of the day jetting off from George Bush Intercontinental Airport (IAH) is at around 7:10PM UTC-6. Hop on this flight and you'll arrive at Los Angeles - Ontario Intl. Airport (ONT) at approximately 8:46PM UTC-8. The total travel time is 3h 36m.
How long does it take to fly from George Bush Intercontinental Airport (IAH) to Los Angeles - Ontario Intl. Airport (ONT)?
Flights from IAH to ONT have an average travel time of 3 hours and 41 minutes. The distance between the two is 1,350 mi.
What airline has the least delays from IAH to ONT?
Consider traveling with United Airlines if you'd like to go straight from George Bush Intercontinental Airport (IAH) to Los Angeles - Ontario Intl. Airport (ONT) without any delays. This carrier has the best track record for punctuality, with an on-time performance of 81%. Want to get notified of any changes? You can check your flight status using the Expedia App.
What is the best time to fly from George Bush Intercontinental Airport (IAH) to Los Angeles - Ontario Intl. Airport (ONT)?
Choose a flight from George Bush Intercontinental Airport (IAH) to Los Angeles - Ontario Intl. Airport (ONT) that takes off before 3 PM to reduce the risk of cancellations. Departures later than this are on average 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports do you fly into for Ontario from George Bush Intercontinental Airport (IAH)?
Take a direct flight from George Bush Intercontinental Airport (IAH) to Ontario and come in for landing at one of these hubs:

  • Los Angeles Intl. Airport (LAX)
  • John Wayne Airport (SNA)
  • Los Angeles - Ontario Intl. Airport (ONT)

Is it cheaper to buy a plane ticket from George Bush Intercontinental Airport (IAH) to Los Angeles - Ontario Intl. Airport (ONT) last-minute?
Booking your flight from IAH to ONT just before your journey is generally more expensive. However, if you're flexible with your departure dates and times, you could snag a cheap last-minute fare.
Is it cheaper to book an IAH to ONT flight and hotel package?
Compared with arranging flights and hotels separately, booking an IAH to ONT flight and hotel package with Expedia could result in significant savings. Better still, managing everything in one place will take the stress out of travel planning. Just secure your flights and choose from our extensive range of hotels, then tailor your trip with extras like tours and car rentals.
Can I cancel or change the date of my flight from George Bush Intercontinental Airport (IAH) to Los Angeles - Ontario Intl. Airport (ONT)?
You can usually reschedule or cancel your IAH to ONT flight. However, for bookings made more than 24 hours ago, additional charges may apply. Check your airline's policies in your itinerary to see what changes are allowed and whether any costs are involved. You'll also find further details on our Customer Service portal.

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