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Cheap Flights from Houston (HOUA) to Ontario International (ONT)

Compare Houston to Ontario International flight deals

Find the cheapest month or even day of the year to fly to Ontario International

Book the best Ontario International fare with no extra fees

Flight deals from Houston to Ontario International

Looking for a cheap last-minute deal or the best return flight from Houston to Ontario International Airport? If you want to travel next month, return fares start from £143. Find the lowest prices on one-way and return tickets right here.
Ontario.£73 per passenger.Departing Tue, 21 Jul.One-way flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Houston George Bush Intercntl. on Tue, 21 Jul, arriving in Ontario International.Price includes taxes and charges.From £73, select.
Ontario.£74 per passenger.Departing Wed, 12 Aug.One-way flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Houston George Bush Intercntl. on Wed, 12 Aug, arriving in Ontario International.Price includes taxes and charges.From £74, select.
Ontario.£74 per passenger.Departing Tue, 8 Sep.One-way flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Houston George Bush Intercntl. on Tue, 8 Sep, arriving in Ontario International.Price includes taxes and charges.From £74, select.
Ontario.£84 per passenger.Departing Thu, 15 Oct.One-way flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Houston George Bush Intercntl. on Thu, 15 Oct, arriving in Ontario International.Price includes taxes and charges.From £84, select.
Ontario.£96 per passenger.Departing Sat, 27 Jun.One-way flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Houston George Bush Intercntl. on Sat, 27 Jun, arriving in Ontario International.Price includes taxes and charges.From £96, select.
Ontario.£99 per passenger.Departing Tue, 1 Dec.One-way flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Houston Hobby on Tue, 1 Dec, arriving in Ontario International.Price includes taxes and charges.From £99, select.
Ontario.£103 per passenger.Departing Tue, 3 Nov.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Houston George Bush Intercntl. on Tue, 3 Nov, arriving in Ontario International.Price includes taxes and charges.From £103, select.
Ontario.£110 per passenger.Departing Tue, 17 Nov.One-way flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Houston Hobby on Tue, 17 Nov, arriving in Ontario International.Price includes taxes and charges.From £110, select.
Ontario.£140 per passenger.Departing Mon, 4 Jan.One-way flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Houston Hobby on Mon, 4 Jan, arriving in Ontario International.Price includes taxes and charges.From £140, select.
Ontario.£140 per passenger.Departing Mon, 7 Dec.One-way flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Houston Hobby on Mon, 7 Dec, arriving in Ontario International.Price includes taxes and charges.From £140, select.
Ontario.£158 per passenger.Departing Sat, 1 May.One-way flight with Alaska Airlines.Outbound indirect flight with Alaska Airlines, departs from Houston George Bush Intercntl. on Sat, 1 May, arriving in Ontario International.Price includes taxes and charges.From £158, select.
Ontario.£160 per passenger.Departing Thu, 15 Apr.One-way flight with Alaska Airlines.Outbound indirect flight with Alaska Airlines, departs from Houston George Bush Intercntl. on Thu, 15 Apr, arriving in Ontario International.Price includes taxes and charges.From £160, select.

Find the cheapest month to fly from Houston to Ontario International

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Houston to Ontario International flights are currently cheapest in July.
Jun
from £96
Jul
from £73
Aug
from £74
Sep
from £74
Oct
from £84
Nov
from £103
Dec
from £99
Jan
from £140
Feb
Find prices
Mar
Find prices
Apr
from £160
May
from £158

Direct flights from Houston to Ontario International

Houston to Ontario International: Alternative routes

Compare routes from Houston to Ontario below. You may find an airport to fly into that's cheaper, faster, or easier than Ontario International.

Ontario International

2 miles from central Ontario
Closest
from £73
Search flights

San Bernardino Norton AFB

24 miles from central Ontario
Search flights

Santa Ana John Wayne

30 miles from central Ontario
from £76
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Long Beach Municipal

33 miles from central Ontario
Cheapest
from £63
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Hawthorne

40 miles from central Ontario
from £235
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Burbank

42 miles from central Ontario
from £77
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Los Angeles International

44 miles from central Ontario
from £77
Search flights

Houston to Ontario: Flight information

The things to know before you go.
Cheapest flight found£73
Cheapest month to flyJuly
Average flight time3 hrs, 24 mins
Most popular airlineSouthwest Airlines
Average flights per week35

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

The best price we found for a return flight from Houston to Ontario International is £143. 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 24 minutes is the average flight time from Houston to Ontario International.
Southwest Airlines, Lufthansa and United fly direct from Houston to Ontario International.
As of June 2026, there are 35 flights per week flying from Houston to Ontario International.
The cheapest month to fly from Houston to Ontario International is usually July.
After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Houston to Ontario International Airport on Tuesday, 21 July 2026.
Yes – the average flight time is 3 hours and 24 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 Ontario International 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 Ontario is around 40 days in advance, so don’t leave your flight to the last minute.
The cheapest airline that flies to Ontario International is Frontier Airlines .

Travelling from Houston to Ontario International Airport (ONT): What you need to know

  • Start your trip planning by checking out the most convenient departure point for your flight from Houston to Ontario International Airport (ONT). Explore the options for setting off from Houston George Bush Intercontinental Airport (IAH) or Houston Hobby Airport (HOU), the city's main airports.

  • 3 hours 30 minutes is the average journey time for a direct Houston to Ontario International Airport flight.

  • The timezone in Ontario is UTC-8, which is two hours behind Houston. Ontario International Airport is located in Ontario.

  • The busiest route is from Houston George Bush Intercontinental Airport (IAH) to Ontario International Airport (ONT). You can pick from 8 direct services every week. Frontier Airlines operates a 11:57am departure between IAH and ONT.

  • For a stress-free journey, turn up at the airport two hours ahead of international flights and an hour before domestic departures. This ensures you have enough time to catch your flight from Houston to ONT.

  • Peak months like July or holiday times such as Thanksgiving and Christmas will mean bigger queues at check-in and security. Be on the safe side and get to the terminal even earlier. Arriving two hours before domestic flights and up four hours ahead of an international flight is wise.

Airports in Houston

Houston George Bush Intercontinental Airport (IAH)

  • Reach your destination without the detour from Houston George Bush Intercontinental Airport (IAH). Nonstop flights from Houston to Ontario International Airport (ONT) operate from here.

  • When jetting out of IAH, you can catch a direct flight from Houston to Ontario International Airport with United Airlines.

  • Most passengers prefer to book seats with United from IAH to ONT.

  • The most reliable carrier for punctuality on this route is Frontier Airlines. Its services arrive without delay 69.7% of the time.

  • Located around 40 kms (25 miles) from central Houston, IAH can be reached in about 30 minutes by car, depending on traffic. The journey on public transport is roughly 1 hour 10 minutes.

  • Searching for a comfortable hotel near Houston George Bush Intercontinental Airport? If you've booked an early flight from Houston to Ontario International Airport, these accommodation options will put you conveniently close to check-in:

  • Of the departures from Houston George Bush Intercontinental Airport, 79% arrive on time at their destination.

  • The address for IAH is 16930 JFK Boulevard.

Houston Hobby Airport (HOU)

  • You can book a direct Houston to Ontario International Airport (ONT) plane ticket out of Houston Hobby Airport (HOU). Check if flying out of HOU makes more sense for your journey.

  • Southwest Airlines operates direct flights from Houston to ONT departing from HOU. Book your favourite window seat and arrive at your destination in a single stretch.

  • Southwest Airlines takes the lead in bookings on the HOU to ONT route.

  • Southwest Airlines is the most reliable carrier flying from Houston Hobby Airport to Ontario International Airport, with 77.97% of its services reaching their destination on time.

  • You can get to HOU from central Houston in about 20 minutes by car, depending on traffic conditions. The journey on public transport takes roughly 50 minutes to cover the 19 kms (12 miles) or so.

  • Want to enjoy an extra night away before your Houston to ONT flight? Unwind in a hotel near Houston Hobby Airport before your adventure officially starts. These stays have a room with your name on it:

  • 79% of flights out of Houston Hobby Airport arrive according to schedule.

  • The street address for HOU is 7800 Airport Boulevard.

About Ontario International Airport (ONT)

Getting from Ontario International Airport (ONT) to central Ontario

  • From Ontario International Airport, central Ontario is around 10 kms (6 miles) away. It takes about 15 minutes to get to the city centre by car.

  • Travelling on public transport takes roughly 45 minutes.

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

  • The lowest price we've found for a one-way ticket from Houston to Ontario International Airport is £73. For a return flight on this route, the best price is £143. Depending on the availability and when you book, these fares can change.

  • Don't leave things to the last minute. You're more likely to walk away with cheap flights from Houston to ONT if you book in advance. Airlines often offer some excellent early bird rates.

  • Cheap Houston to Ontario International Airport tickets are easier to find when your travel dates are flexible. Try using the 'Whole month' tool to compare fares across every month and then fly out on the cheapest day.

  • You don't need to check back in every day to find out if prices have dropped when you set up a Price Alert. We'll notify you as soon as there's a better deal on plane tickets from Houston to ONT.

  • Tailor your travel plans using filters. Select your arrival and departure times, airlines and total journey duration. You can also sort your results by 'Fastest,' 'Cheapest' or 'Best' flights from Houston to Ontario International Airport.

The best time to fly from Houston to Ontario International Airport (ONT)

  • It's time to decide when to book your flight from Houston to Ontario International Airport (ONT). July is the peak month for travel to Ontario. If a slower pace sounds more appealing, go in December.

  • The warmest month in Ontario is August, with temperatures ranging between 16ºC and 36ºC. Lock in your Houston to ONT plane ticket then if that's your ideal forecast.

  • February has temperatures of between 4ºC and 24ºC. Look for cheap tickets from Houston to Ontario International Airport around that time if you want to travel in cooler conditions.

More about Ontario

Explore more of the United States

  • You've visited Ontario, now it's time to discover other parts of the United States. Travel about 153 kms (95 miles) south to San Diego to check off its must-visit sights. From San Diego Zoo to San Diego Balboa Park and USS Midway Museum, you've got a jam-packed schedule ahead.

  • Around 193 kms (120 miles) northwest of Ontario, Bakersfield is another favourite stop in the United States. Experience major highlights starting with Kern County Museum, Rabobank Arena, Theatre & Convention Centre and Bakersfield Museum of Art.

Prices shown on this page are estimated lowest prices only. Found in the last 12 days.