How often are flights from Ontario to Houston delayed?

About 12% of weekly flights between Ontario and Houston have experienced delays in the past year, with the average delay time being 117 minutes.

What is the most punctual flight time for Ontario to Houston flights?

Historically, flights departing in the morning are less likely to be delayed, whereas flights leaving in the early afternoon tend to experience delays more often.

Which airline has the best punctuality record on Ontario to Houston flights?

Over the last year, United Airlines have had the lowest number of delays on this route, with just 5% of flights being delayed.

What day of the week experiences the fewest flight delays on this route?

Sunday tends to have the lowest number of delays on this route, whereas Monday has historically faced a higher average of delays compared to other days of the week.

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

Frontier, at $97, was found to be the cheapest airline from Ontario to Houston.Alternate airlines to your destination round-trip include Delta and United Airlines. Frontier is priced at 70% 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?

$49 is the cheapest one-way deal found within the past few days, from Frontier. You may also be able to find cheap deals on United Airlines and American Airlines, with prices starting from $72 and $115, respectively.

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.

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).

What are the cheapest flights from Ontario to Houston?

The cheapest flight price from Ontario to Houston is $176. On average you can expect to pay $360. The most popular route, (Ontario - Houston Hobby), can usually be booked for $180.

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

Consider Frontier, United Airlines or Southwest when booking your flight. These represent the most popular airlines when flying from Ontario to Houston.

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.

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.

Find Cheap Flights from Ontario to Houston

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Cheapflights Tip: The best prices from Ontario to Houston are usually found in October or September, booked 60 days in advance, depart on a Thursday or Tuesday and return on a Thursday

Find flight deals from Ontario to Houston

Most accurate provider	Expedia 1 star
Most trusted provider	Expedia 3 stars
Popular in	March
Cheapest in	October
Average price	$284

Provider with most accurate pricing for Los Angeles-Houston flight deals.

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Provider most trusted by Cheapflights users for Los Angeles-Houston flights.

Search Deals

Highest demand for flights based on searches. 11% potential increase in price ($42 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease ($8 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in September 2026

Search Deals

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.

ONT-HO1

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

Prices

Delays

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

The best time to book flights from Ontario to Houston is 86 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, October is the cheapest month in which you can book a flight from Ontario to Houston (average of $255). Flying from Ontario to Houston in March is currently the most expensive (average of $408). 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?

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 43% on your trip compared to booking a flight in the morning.

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

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

The best insider tips for Ontario to Houston flights

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

Read through reviews of airlines operating flights from Ontario to Houston, such as Southwest,United Airlines, andJetBlue. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Southwest

8.0

Very good

4,201 reviews

Reviews

1 / 20

2.0

Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

Southwest

8.0

Very good

4,201 reviews

Southwest

8.0

Very good

4,201 reviews

Reviews

1 / 20

2.0

Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

United Airlines

7.4

Good

10,243 reviews

Southwest

8.0

Very good

4,201 reviews

Reviews

1 / 20

2.0

Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

JetBlue

7.1

Good

3,041 reviews

Southwest

8.0

Very good

4,201 reviews

Reviews

1 / 20

2.0

Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

American Airlines

7.0

Good

12,098 reviews

Southwest

8.0

Very good

4,201 reviews

Reviews

1 / 20

2.0

Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

Frontier

5.6

Fair

2,572 reviews

Southwest

8.0

Very good

4,201 reviews

Reviews

1 / 20

2.0

Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

Related info for your journey

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 $97, was found to be the cheapest airline from Ontario to Houston.Alternate airlines to your destination round-trip include Delta and United Airlines. Frontier is priced at 70% 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?
$49 is the cheapest one-way deal found within the past few days, from Frontier. You may also be able to find cheap deals on United Airlines and American Airlines, with prices starting from $72 and $115, respectively.
What are the cheapest flights from Ontario to Houston?
The cheapest flight price from Ontario to Houston is $176. On average you can expect to pay $360. The most popular route, (Ontario - Houston Hobby), can usually be booked for $180.
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, October is the cheapest month in which you can book a flight from Ontario to Houston (average of $255). Flying from Ontario to Houston in March is currently the most expensive (average of $408). 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

Browse thousands of different options on Cheapflights for your next trip

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Oakland to George Bush Intcntl flights

Top 6 airlines flying from Ontario to Houston

Airline	Cheapest	Average	Flexibility	On-time
Frontier	Cheapest$97	Average$246	FlexibilityNo cancel fee	On-time62%
Delta	Cheapest$127	Average$209	FlexibilityNo cancel fee	On-timeN/A
United Airlines	Cheapest$177	Average$387	FlexibilityNo cancel fee	On-time69%
American Airlines	Cheapest$186	Average$408	FlexibilityNo cancel fee	On-time71%
Southwest	Cheapest$235	Average$391	FlexibilityNo cancel fee	On-time63%
JetBlue	Cheapest$236	Average$356	FlexibilityNo cancel fee	On-time62%

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Cheap flights from Ontario (ONT) to Houston

Find cheap flights from Ontario to Houston with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Find flight deals from Ontario to Houston

Most accurate provider

Most trusted provider

Popular in

Cheapest in

Average price

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.

Cheapflights Insights

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

The best time to book flights from Ontario to Houston is 86 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?

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

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 43% on your trip compared to booking a flight in the morning.

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

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

How often are flights from Ontario to Houston delayed?

About 12% of weekly flights between Ontario and Houston have experienced delays in the past year, with the average delay time being 117 minutes.

What is the most punctual flight time for Ontario to Houston flights?

Historically, flights departing in the morning are less likely to be delayed, whereas flights leaving in the early afternoon tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Sunday tends to have the lowest number of delays on this route, whereas Monday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on Ontario to Houston flights?

Over the last year, United Airlines have had the lowest number of delays on this route, with just 5% of flights being delayed.

The best insider tips for Ontario to Houston 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 Ontario to Houston trip

Our travel experts

Reviews of airlines servicing Houston

Read through reviews of airlines operating flights from Ontario to Houston, such as Southwest,United Airlines, andJetBlue. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

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

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

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

What are the cheapest flights from Ontario to Houston?

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

How can I find direct flights from Ontario to Houston?

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

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

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Ontario to Houston

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

Complete your trip

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

Search flights from Ontario to Houston by cabin class

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

Ontario and Houston flights

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

Other flights from Ontario

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

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Top 6 airlines flying from Ontario to Houston

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