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Cheap Flights from Ontario International to Houston

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Flight deals from Ontario International to Houston

Looking for a cheap last-minute deal or the best return flight from Ontario International to Houston? Find the lowest prices on one-way and return tickets right here.
Houston.134 € per passenger.Departing Mon, 1 Sep, returning Sat, 6 Sep.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Ontario International on Mon, 1 Sep, arriving in Houston George Bush Intercntl..Inbound direct flight with Frontier Airlines departs from Houston George Bush Intercntl. on Sat, 6 Sep, arriving in Ontario International.Price includes taxes and charges.From 134 €, select.
Houston.138 € per passenger.Departing Fri, 22 Aug, returning Mon, 25 Aug.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Ontario International on Fri, 22 Aug, arriving in Houston George Bush Intercntl..Inbound direct flight with Frontier Airlines departs from Houston George Bush Intercntl. on Mon, 25 Aug, arriving in Ontario International.Price includes taxes and charges.From 138 €, select.
Houston.142 € per passenger.Departing Wed, 15 Oct, returning Wed, 22 Oct.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Ontario International on Wed, 15 Oct, arriving in Houston Hobby.Inbound direct flight with Southwest Airlines departs from Houston Hobby on Wed, 22 Oct, arriving in Ontario International.Price includes taxes and charges.From 142 €, select.
Houston.143 € per passenger.Departing Sat, 15 Nov, returning Tue, 18 Nov.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Ontario International on Sat, 15 Nov, arriving in Houston Hobby.Inbound direct flight with Southwest Airlines departs from Houston Hobby on Tue, 18 Nov, arriving in Ontario International.Price includes taxes and charges.From 143 €, select.
Houston.156 € per passenger.Departing Fri, 29 Aug, returning Mon, 1 Sep.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Ontario International on Fri, 29 Aug, arriving in Houston George Bush Intercntl..Inbound direct flight with Frontier Airlines departs from Houston George Bush Intercntl. on Mon, 1 Sep, arriving in Ontario International.Price includes taxes and charges.From 156 €, select.
Houston.159 € per passenger.Departing Thu, 18 Sep, returning Wed, 1 Oct.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Ontario International on Thu, 18 Sep, arriving in Houston Hobby.Inbound direct flight with Southwest Airlines departs from Houston Hobby on Wed, 1 Oct, arriving in Ontario International.Price includes taxes and charges.From 159 €, select.
Houston.164 € per passenger.Departing Fri, 18 Jul, returning Mon, 21 Jul.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Ontario International on Fri, 18 Jul, arriving in Houston George Bush Intercntl..Inbound direct flight with Frontier Airlines departs from Houston George Bush Intercntl. on Mon, 21 Jul, arriving in Ontario International.Price includes taxes and charges.From 164 €, select.
Houston.165 € per passenger.Departing Fri, 18 Jul, returning Fri, 1 Aug.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Ontario International on Fri, 18 Jul, arriving in Houston George Bush Intercntl..Inbound direct flight with Frontier Airlines departs from Houston George Bush Intercntl. on Fri, 1 Aug, arriving in Ontario International.Price includes taxes and charges.From 165 €, select.

Find the cheapest month to fly from Ontario International to Houston

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Ontario International to Houston flights are currently cheapest in September.
Jun
from 182 €
Jul
from 164 €
Aug
from 138 €
Sep
from 134 €
Oct
from 142 €
Nov
from 143 €
Dec
from 405 €
Jan
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Feb
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Mar
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Apr
from 339 €
May
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Direct flights from Ontario International to Houston

Alternative Ontario International to Houston routes

Looking for the cheapest, fastest or easiest route from Ontario International to Houston? You could fly into the following airports instead.

Ontario to Houston: Flight information

The things to know before you go.
Cheapest flight found134 €
Cheapest month to flySeptember
Average flight time3 hrs, 13 mins
Most popular airlineSouthwest Airlines
Average flights per week18

Finding cheap flights from Ontario International to Houston: Frequently asked questions

There are 4 airports in Houston: Houston Hobby, Houston George Bush Intercntl., Houston Ellington Field, and Galveston.
The best price we found for a return flight from Ontario International to Houston is 134 €. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
3 hours and 13 minutes is the average flight time from Ontario International to Houston.
Southwest Airlines, United and Frontier Airlines fly direct from Ontario International to Houston.
As of June 2025, there are 36 flights per week flying from Ontario International to Houston.
The cheapest month to fly from Ontario International to Houston is usually June 2025.
If you're flying from Ontario International Airport, the cheapest airport near Houston is Houston George Bush Intercntl. – which is 25.0 km away from the centre of Houston. We've found flights into this airport from 134 €.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Ontario International Airport to Houston on Monday, 1 September 2025.
Yes – the average flight time is 3 hours and 13 minutes.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Houston but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Houston is around 40 days in advance, so don’t leave your flight to the last minute.
In June, the average temperature is usually around 28°C. August is typically the warmest month in Houston, when it usually averages around 34°C. You can expect the least rain in March. The coldest month is January, with temperatures averaging 6°C. The rainiest month is June.
Currently, Frontier Airlines offers the cheapest flight tickets to Houston.

Flying from Ontario International Airport (ONT) to Houston: what you need to know

  • Around 3 hours 25 minutes is how long you can expect to be travelling on a direct flight from Ontario International Airport to Houston.

  • Houston is two hours ahead of Ontario, where Ontario International Airport is located. Houston follows the UTC-5 timezone.

  • The busiest route is from Ontario International Airport (ONT) to George Bush Intercontinental Airport (IAH). There are eight weekly services between these two airports. United Airlines offers a 06:00 departure between ONT and IAH.

  • For hassle-free travel, arrive at the airport two hours ahead of international flights and one hour before domestic departures. This will give you enough time to catch your ONT to Houston flight.

  • If you're jetting off during a bank holiday or another peak period, allow for even more time. A good general rule is two hours ahead of domestic flights and up to four hours before international departures. Security and check-in lines will be longer.

  • You can book a direct Ontario International Airport to Houston ticket. Begin your trip at ONT and arrive at George Bush Intercontinental Airport (IAH).

  • Well-known airlines that offer direct flights from Ontario International Airport to Houston include:

  • The journey from central Ontario to ONT takes about 1 hour 30 minutes by public transport. If you ride-share, drive or grab a cab, you'll cover the 5 kilometres in 10 minutes or so, depending on traffic conditions.

  • In search of a hotel near ONT? If you're boarding an early flight from Ontario International Airport to Houston, these stays will put you moments from your departure gate:

  • Ontario International Airport maintains a strong on-time record, so you're unlikely to face delays. Departures from ONT arrive on schedule 83.6% of the time.

  • ONT is located at 2900 E. Airport Drive.

How to find the cheapest flights from Ontario International Airport (ONT) to Houston

  • 71 € is the cheapest price we've found for a one-way Ontario International Airport to Houston flight. A round-trip plane ticket right now is 134 €. Depending on when you book and the availability, these fares can change.

  • Get cheap flights from ONT to Houston by booking one month ahead. Based on our research, that's the sweet spot for landing a bargain.

  • May is the best month for landing an awesome deal on Ontario International Airport to Houston tickets. If you're looking to travel during a different time of year, the 'Whole month' tool will show you the lowest prices for every month.

  • Save time looking for cheap flights from ONT to Houston by setting up a Price Alert. You'll receive an email or notification on the app when fares go down.

  • Select your ideal arrival and departure times, number of stops and airlines with our filters. Then, sort the results for your flight from Ontario International Airport to Houston by 'Cheapest,' 'Best' or 'Fastest.'

Airports in Houston

George Bush Intercontinental Airport (IAH)

William P. Hobby Airport (HOU)

  • After your flight from Ontario International Airport to Houston has touched down, you can reach the city centre in about 20 minutes by car. Central Houston is roughly 19 kilometres from William P. Hobby Airport (HOU).

  • If you travel by public transport, the ride to the centre will take you 1 hour 40 minutes or so.

  • Following your ONT to Houston flight, rest your head at a hotel near HOU. These are some great accommodation options that'll help you sink into relaxation mode:

  • Easirent, Dollar and Thrifty make collecting a William P. Hobby Airport rental car simple. These trusted providers are located in or around the terminal and will have you on the road before long.

  • Don't pay more than you need to. Booking your ride four weeks ahead of your arrival at HOU will help you stay within budget.

  • William P. Hobby Airport can be found at 7800 Airport Boulevard.

Best time to go to Houston

  • Carefully consider your dates before booking your flight from Ontario International Airport to Houston. The city comes alive during peak season, but rates are typically higher and major attractions can get crowded. Visit Houston in the low season if you want a more relaxed vibe.

  • The warmest month in Houston is August, with temperatures ranging between 24ºC (75ºF) and 40ºC (104ºF). Book your Ontario International Airport to Houston plane ticket then if you enjoy this type of weather.

  • January sees average temperatures of between 5ºC (41ºF) and 19ºC (66ºF). Search for a cheap ticket from ONT to Houston around that time if you want to travel when it's cooler.

More about Houston

  • Start your Houston trip off on the right foot by choosing the ideal place to stay. Once you've booked your flight from Ontario International Airport to Houston, check out our range of hotels including:

  • There are so many things to explore in this city it can be tricky to know where to begin. The Museum of Fine Arts, Houston, Beck Building, The Houston Museum of Natural Science and Hermann Park are major attractions which should feature on any well-planned Houston itinerary.

Explore more of United States

  • You've visited Houston, now it's time to discover other corners of United States. Journey about 306 kilometres west to San Antonio to check off its leading attractions. From The San Antonio River Walk to San Antonio Missions National Historical Park and San Fernando Cathedral, your itinerary will be busy.

  • If you want to check out another great destination in United States, consider Dallas, roughly 370 kilometres north of Houston. Dallas Arboretum and Botanical Gardens, Perot Museum of Nature and Science and Dallas Museum of Art are among the biggest draws.

Plan the rest of your trip from Ontario to Houston

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.