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

Currently priced at $61, 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 United Airlines and American Airlines - these airlines can fly you to your destination from $172 and $186, respectively. Frontier is currently priced 78% 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 $56 on Frontier. Other airlines that offer cheap prices include United Airlines from $76 and Southwest from $117 one-way.

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.

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).

What are the cheapest flights from Houston to Ontario?

On average you can expect to pay $298 for a flight from Houston to Ontario. The cheapest flight overall is $117 while the most popular route, (Houston Hobby - Ontario) is currently priced at $183.

What are the most popular airlines that fly from Houston to Ontario?

When booking a flight from Houston to Ontario, you may want to consider flying on Frontier, United Airlines or Southwest as they are the most popular for this route.

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. 4 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 1 inbound flight from Houston per day.

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.

Find Cheap Flights from Houston to Ontario

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Cheapflights Tip: The best prices from Houston to Ontario are usually found in August or May, booked 57 days in advance, depart on a Thursday or Friday and return on a Thursday

Find flight deals from Houston to Ontario

Popular in	December
Cheapest in	August
Average price	$324

Highest demand for flights based on searches. 4% potential increase in price ($13 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease ($11 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in September 2026

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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.

HO1-ONT

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 Houston to Ontario

How far ahead should I book a flight from Houston to Ontario?

The best time to book flights from Houston to Ontario is 22 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 $176). Flying from Houston to Ontario in December is currently the most expensive (average of $362). 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?

A simple way to save on the total cost of your ticket is to fly from Houston to Ontario at noon. If you’re flexible enough to do this you can expect to save up to 22% on your trip compared to booking a flight in the evening.

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

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

The best insider tips for Houston to Ontario flights

Cheapflights partnered with top experts to bring you the best recommendations for your Houston to Ontario trip

Our travel experts

Marisa Garcia

Expert on Frontier

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.

Harriet Baskas

Expert on United Airlines

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.

Evie Carrick

Expert on IAH

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.

Bill Fink

Expert on ONT

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.

Scott Laird

Expert on HOU

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.

See what other customers who have flown with Southwest,United Airlines, andAmerican Airlines 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

8.0

Very good

4,201 reviews

Reviews

1 / 20

6.0

Good

Scott,Feb 2026

HOU - FLL

Delayed by 45 minutes leaving Houston, making a 3.5 hour layover that much longer.

Southwest

8.0

Very good

4,201 reviews

Southwest

8.0

Very good

4,201 reviews

Reviews

1 / 20

6.0

Good

Scott,Feb 2026

HOU - FLL

Delayed by 45 minutes leaving Houston, making a 3.5 hour layover that much longer.

United Airlines

7.4

Good

10,246 reviews

Southwest

8.0

Very good

4,201 reviews

Reviews

1 / 20

6.0

Good

Scott,Feb 2026

HOU - FLL

Delayed by 45 minutes leaving Houston, making a 3.5 hour layover that much longer.

American Airlines

7.0

Good

12,099 reviews

Southwest

8.0

Very good

4,201 reviews

Reviews

1 / 20

6.0

Good

Scott,Feb 2026

HOU - FLL

Delayed by 45 minutes leaving Houston, making a 3.5 hour layover that much longer.

Frontier

5.6

Fair

2,573 reviews

Southwest

8.0

Very good

4,201 reviews

Reviews

1 / 20

6.0

Good

Scott,Feb 2026

HOU - FLL

Delayed by 45 minutes leaving Houston, making a 3.5 hour layover that much longer.

Related info for your journey

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. 4 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 1 inbound flight from Houston per day.
What are the cheapest airlines flying from Houston to Ontario round-trip?
Currently priced at $61, 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 United Airlines and American Airlines - these airlines can fly you to your destination from $172 and $186, respectively. Frontier is currently priced 78% 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 $56 on Frontier. Other airlines that offer cheap prices include United Airlines from $76 and Southwest from $117 one-way.
What are the cheapest flights from Houston to Ontario?
On average you can expect to pay $298 for a flight from Houston to Ontario. The cheapest flight overall is $117 while the most popular route, (Houston Hobby - Ontario) is currently priced at $183.
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 $176). Flying from Houston to Ontario in December is currently the most expensive (average of $362). 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 4 airlines flying from Houston to Ontario

Airline	Cheapest	Average	Flexibility	On-time
Frontier	Cheapest$61	Average$211	FlexibilityNo cancel fee	On-time62%
United Airlines	Cheapest$172	Average$369	FlexibilityNo cancel fee	On-time69%
American Airlines	Cheapest$186	Average$398	FlexibilityNo cancel fee	On-time71%
Southwest	Cheapest$235	Average$391	FlexibilityNo cancel fee	On-time63%

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Cheap flights from Houston to Ontario (ONT)

Find cheap flights from Houston to Ontario with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Find flight deals from Houston to Ontario

Popular in

Cheapest in

Average price

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.

Cheapflights Insights

How far ahead should I book a flight from Houston to Ontario?

The best time to book flights from Houston to Ontario is 22 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?

What is the cheapest time of day to fly from HOU to ONT?

A simple way to save on the total cost of your ticket is to fly from Houston to Ontario at noon. If you’re flexible enough to do this you can expect to save up to 22% on your trip compared to booking a flight in the evening.

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

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

The best insider tips for Houston to Ontario flights

AI-powered summary based on content written by travel experts. AI can make mistakes.

Cheapflights partnered with top experts to bring you the best recommendations for your Houston to Ontario trip

Our travel experts

Reviews of airlines servicing Ontario

See what other customers who have flown with Southwest,United Airlines, andAmerican Airlines 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.

Related info for your journey

What airport do you fly into for flights to Ontario from Houston?

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

What are the cheapest airlines to fly from Houston to Ontario one-way?

What are the cheapest flights from Houston to Ontario?

Can I find deals for flights from Houston to Ontario that include hotel bookings?

How can I find direct flights from Houston to Ontario?

Can I find deals for business class flights from Houston to Ontario?

What is the cheapest month to book a flight from Houston to Ontario?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Houston to Ontario

See prices for flight routes from nearby airports that may be better suited for you.

Complete your trip

Complete your trip to Ontario by adding a car rental and/or hotel reservation to your travel itinerary.

Search flights from Houston to Ontario by cabin class

Find flights from Houston to Ontario, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Other flights to Ontario

Explore flights to Ontario departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on September 27, 2026.

Houston and Ontario flights

Browse other Houston and Ontario flight options. Last updated on September 27, 2026.

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Top 4 airlines flying from Houston to Ontario

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