$72 Cheap Flights from Ontario (ONT) to Houston (IAH)

View $72 flight on Fri, Aug 29, 2025Opens in a new window

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

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Today's featured flight deals from Los Angeles - Ontario Intl. Airport (ONT) to George Bush Intercontinental Airport (IAH)

Nonstop
Carry-on included
Lower price than typical

Cheap Flights from Ontario to Houston (ONT-IAH)

Prices were available within the past 7 days and start at $72 for one-way flights and $142 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Fri, Oct 3 - Mon, Oct 13
ONT
Ontario
IAH
Houston
$142 Roundtrip, found 5 days ago
$142
Roundtrip
found 5 days ago
Select Frontier Airlines flight, departing Fri, Oct 3 from Ontario to Houston, returning Mon, Oct 13, priced at $142 found 5 days ago
Frontier Airlines
Fri, Aug 29 - Fri, Sep 5
ONT
Ontario
IAH
Houston
$149 Roundtrip, just found
$149
Roundtrip
just found
Select Frontier Airlines flight, departing Fri, Aug 29 from Ontario to Houston, returning Fri, Sep 5, priced at $149 just found
Frontier Airlines
Thu, Oct 30 - Mon, Nov 3
ONT
Ontario
IAH
Houston
$152 Roundtrip, just found
$152
Roundtrip
just found
Select Frontier Airlines flight, departing Thu, Oct 30 from Ontario to Houston, returning Mon, Nov 3, priced at $152 just found
Frontier Airlines
Fri, Sep 26 - Fri, Oct 3
ONT
Ontario
IAH
Houston
$158 Roundtrip, found 4 days ago
$158
Roundtrip
found 4 days ago
Select Frontier Airlines flight, departing Fri, Sep 26 from Ontario to Houston, returning Fri, Oct 3, priced at $158 found 4 days ago
Frontier Airlines
Fri, Oct 10 - Sun, Oct 12
ONT
Ontario
IAH
Houston
$159 Roundtrip, found 4 hours ago
$159
Roundtrip
found 4 hours ago
Select Frontier Airlines flight, departing Fri, Oct 10 from Ontario to Houston, returning Sun, Oct 12, priced at $159 found 4 hours ago
Frontier Airlines
Thu, Sep 11 - Fri, Sep 19
ONT
Ontario
IAH
Houston
$160 Roundtrip, found 3 days ago
$160
Roundtrip
found 3 days ago
Select Frontier Airlines flight, departing Thu, Sep 11 from Ontario to Houston, returning Fri, Sep 19, priced at $160 found 3 days ago
American Airlines
Wed, Aug 27 - Sat, Aug 30
ONT
Ontario
IAH
Houston
$168 Roundtrip, found 2 hours ago
$168
Roundtrip
found 2 hours ago
Select American Airlines flight, departing Wed, Aug 27 from Ontario to Houston, returning Sat, Aug 30, priced at $168 found 2 hours ago
United
Tue, Oct 21 - Sat, Oct 25
ONT
Ontario
IAH
Houston
$169 Roundtrip, found 3 hours ago
$169
Roundtrip
found 3 hours ago
Select United flight, departing Tue, Oct 21 from Ontario to Houston, returning Sat, Oct 25, priced at $169 found 3 hours ago
Alaska Airlines
Wed, Oct 15 - Sat, Oct 18
ONT
Ontario
IAH
Houston
$181 Roundtrip, found 13 hours ago
$181
Roundtrip
found 13 hours ago
Select Alaska Airlines flight, departing Wed, Oct 15 from Ontario to Houston, returning Sat, Oct 18, priced at $181 found 13 hours ago
Hawaiian Airlines
Sat, Sep 27 - Tue, Oct 7
ONT
Ontario
IAH
Houston
$203 Roundtrip, just found
$203
Roundtrip
just found
Select Hawaiian Airlines flight, departing Sat, Sep 27 from Ontario to Houston, returning Tue, Oct 7, priced at $203 just found

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

March is typically the cheapest month to fly

From $69 - $474 per traveler.

Graph displaying average flight prices per month

Alternative airports near Houston

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to George Bush Intercontinental IAH. Cheapest option available. Average driving time to city center is 24 minutes. Flights from $233
IAH
George Bush Intercontinental
Cheapest
Average driving time to city center24 min
Flights from $233
Flights from Ontario (ONT) to Houston (IAH)
Origin airport
Los Angeles - Ontario Intl.
Destination airport
George Bush Intercontinental
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, Hawaiian Airlines, United
Roundtrip price
$142
Distance
1330 mi
Average flight time
5 hours 23 mins

Ontario to Houston Flights

The cheapest times to fly from Ontario to Houston

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 Ontario to Houston are during the month of October. You can find some of the cheapest flights from Ontario to Houston with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Ontario to Houston

Sunday is one of the best days to book for cheap flights from Ontario to Houston: 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 Ontario to Houston

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 Ontario to Houston in 2025. You can also book with separate airlines for your outbound and return journeys, from $72 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 Ontario to Houston 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 Ontario to Houston 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 Los Angeles - Ontario Intl. Airport (ONT) to George Bush Intercontinental Airport (IAH) cost?
Snag a cheap one-way flight from $72 or cheap return flight from $142 from Los Angeles - Ontario Intl. Airport (ONT) to George Bush Intercontinental Airport (IAH) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from Los Angeles - Ontario Intl. Airport (ONT) to George Bush Intercontinental Airport (IAH)?
The cheapest month to fly from ONT to IAH is October, when demand is low. Off-peak season is typically when you'll find lower airfares between these airports.
Which airlines fly direct from Los Angeles - Ontario Intl. Airport (ONT) to George Bush Intercontinental Airport (IAH)?
Take a nonstop flight with United Airlines and head straight from Los Angeles - Ontario Intl. Airport (ONT) to George Bush Intercontinental Airport (IAH).
What is the cheapest airline that flies from Los Angeles - Ontario Intl. Airport (ONT) to George Bush Intercontinental Airport (IAH)?
Frontier Airlines and United Airlines are popular airlines offering reasonable fares. Don't forget that flight prices from Los Angeles - Ontario Intl. Airport (ONT) to George Bush Intercontinental Airport (IAH) can change depending on travel dates, demand and how early you book. With Expedia's search tool, you can easily find an ONT to IAH flight that works with your plans and budget.
How many flights per day from Los Angeles - Ontario Intl. Airport (ONT) to George Bush Intercontinental Airport (IAH)?
On average, Los Angeles - Ontario Intl. Airport (ONT) only offers 1 direct flight to George Bush Intercontinental Airport (IAH) every day. For more options, try our easy-to-use filter tool. Simply enter your preferred travel dates, then click on "1 Stop" or "2+ Stops" to discover flights offering layovers.
What are the most popular departure times for flights from Los Angeles - Ontario Intl. Airport (ONT) to George Bush Intercontinental Airport (IAH)?
More people fly between ONT and IAH at 6 AM than at any other point in the day. Looking for a quieter experience? Consider flying outside peak hours and there's a chance you'll save on your ticket as well.
What day of the week has the most flights from ONT to IAH?
If you fly on a Friday, you'll get the biggest range of choices for flights from Los Angeles - Ontario Intl. Airport (ONT) to George Bush Intercontinental Airport (IAH).
What is the earliest flight from Los Angeles - Ontario Intl. Airport (ONT) to George Bush Intercontinental Airport (IAH)?
The earliest flight jetting off from Los Angeles - Ontario Intl. Airport (ONT) is at around 6:00AM UTC-8. Hop on this flight and you'll reach George Bush Intercontinental Airport (IAH) at approximately 11:03AM UTC-6. The entire trip takes 3h 3m.
How long does it take to fly from Los Angeles - Ontario Intl. Airport (ONT) to George Bush Intercontinental Airport (IAH)?
Flights from ONT to IAH have an average travel time of 3 hours and 3 minutes. The total distance between the two airports is 1,350 mi.
What airline has the least delays from ONT to IAH?
Consider traveling with United Airlines if you'd like to fly straight from Los Angeles - Ontario Intl. Airport (ONT) to George Bush Intercontinental Airport (IAH) without any delays. This carrier has the best track record for punctuality, with an on-time score of 84%. Want real-time updates? You can check your flight status using the Expedia App.
What is the best time to fly from Los Angeles - Ontario Intl. Airport (ONT) to George Bush Intercontinental Airport (IAH)?
To avoid possible delays on the Los Angeles - Ontario Intl. Airport (ONT) to George Bush Intercontinental Airport (IAH) route, aim to fly before 3 PM. Departures after this hour have a 22% higher chance of cancellation.**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 Houston from Los Angeles - Ontario Intl. Airport (ONT)?
You can touch down at George Bush Intercontinental Airport (IAH) or William P. Hobby Airport (HOU) when you travel to Houston on a direct flight from Los Angeles - Ontario Intl. Airport (ONT).
Is it cheaper to buy a plane ticket from Los Angeles - Ontario Intl. Airport (ONT) to George Bush Intercontinental Airport (IAH) last-minute?
Booking your flight from ONT to IAH just before your journey is typically more expensive. However, if you're flexible with your itinerary, you could score a cheap last-minute fare.
Is it cheaper to book an ONT to IAH flight and hotel package?
Booking an ONT to IAH flight and hotel package tends to be cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your trip all in one place. Choose from our impressive range of stays and then add activities, flights and car rentals to your booking. Bundle it all together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Los Angeles - Ontario Intl. Airport (ONT) to George Bush Intercontinental Airport (IAH)?
If you booked your ONT to IAH flight within the last 24 hours, you may be able to cancel or modify it without any fees. Depending on the airline and the ticket type you purchased, additional charges may apply for changes beyond that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal for further details.

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*Available to One Key members.