How often are flights from Ontario to Houston delayed?

About 11% of weekly flights between Ontario and Houston have experienced delays in the past year, with the average delay time being 132 minutes.

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

Saturday tends to have the lowest number of delays on this route, whereas Wednesday 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 8% of flights being delayed.

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.

How long is the flight from Ontario to Houston?

There are many flights that can get you from Ontario to Houston in 2h 55m. Fly via United Airlines, Southwest, or Alaska Airlines to get the fastest option. The distance from Ontario to Houston is about 1341 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

Frontier, at $63, was found to be the cheapest airline from Ontario to Houston.Alternate airlines to your destination round-trip include United Airlines and American Airlines. Frontier is priced at 73% 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?

$45 is the cheapest one-way deal found within the past few days, from Frontier. You may also be able to find cheap deals on Southwest and United Airlines, with prices starting from $88 and $88, respectively.

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

The best time to book flights from Ontario to Houston is 51 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, January is the cheapest month in which you can book a flight from Ontario to Houston (average of $55). Flying from Ontario to Houston in August is currently the most expensive (average of $100). 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.

Weekly flight availability from Ontario to Houston

The most flights from ONT to HO1 are scheduled on a Friday (2 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (1 on average).

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 $93. On average you can expect to pay $337. The most popular route, (Ontario - Houston Hobby), can usually be booked for $156.

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 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 55% on your trip compared to booking a flight in the morning.

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 is 1 daily outbound flight to Houston from 4 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.

$64+ Flights from Ontario to Houston

Round-trip from	$129 (CheapOair)
One-way from	$64 (Booking.com)
Popular in	November
Cheapest in	March
Average price	$228

Basic Economy allows a personal item only; no carry-on bags unless exceptions apply.

Economy Plus offers extra legroom seats towards the front of the economy cabin.

Airline	Cheapest	Average	Flexibility	On-time
Frontier	Cheapest$74	Average$186	FlexibilityNo cancel fee	On-time62%
United Airlines	Cheapest$168	Average$378	FlexibilityNo cancel fee	On-time69%
American Airlines	Cheapest$188	Average$400	FlexibilityNo cancel fee	On-time71%
Southwest	Cheapest$191	Average$391	FlexibilityNo cancel fee	On-time63%

$64+ Cheap flights from Ontario (ONT) to Houston

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 2/4. Fares are subject to change and may not be available on all flights or dates of travel.

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

Cheap flight deals from Ontario to Houston

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Ontario to Houston

Cheapest flights from Ontario to HoustonExplore the most affordable flight options available from Ontario to Houston. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 12, 2026.

Explore the most affordable flight options available from Ontario to Houston. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 12, 2026.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Ontario to Houston that are best for you.

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

Everything you need to know about your flight from Ontario to Houston

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

Use this chart to determine the optimal time to book a round-trip flight from Ontario to Houston. Price data was last updated on January 9, 2026.

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?

Find hourly flight availability from Ontario to Houston. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated January 12, 2026.

Weekly flight availability from Ontario to Houston

Explore weekly flight availability from Ontario to Houston. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated January 12, 2026.

How often are flights from Ontario to Houston delayed?

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

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

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

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

Airlines

Frontier

United Airlines

Airports

ONT

IAH

HOU

Our travel experts

Reviews of airlines servicing Houston

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

Related info for your journey

Find useful and relevant information for your journey from Ontario to Houston. 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 from for flights from Ontario to Houston?

How long is the flight 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

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

Alternative routes for Ontario to Houston

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

Top 4 airlines flying from Ontario to Houston

100% Free

Book with Flexibility

Travel Smart

Cheapest flights from Ontario to Houston
Explore the most affordable flight options available from Ontario to Houston. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 12, 2026.