Cheap flights from Houston Hobby to Ontario International

Compare Houston Hobby 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 Hobby to Ontario International

Looking for a cheap last-minute deal or the best return flight from Houston Hobby Airport to Ontario International Airport? If you want to travel next month, return fares start from $338. Find the lowest prices on one-way and return tickets right here.

Find the cheapest month to fly from Houston Hobby to Ontario International

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Houston Hobby to Ontario International flights are currently cheapest in August.

Direct flights from Houston Hobby to Ontario International

Houston to Ontario: Flight information

The things to know before you go.
Cheapest flight found$164
Cheapest month to flyAugust
Average flight time3 hrs, 19 mins
Most popular airlineSouthwest Airlines
Average flights per week8

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

The best price we found for a return flight from Houston Hobby to Ontario International is $325. 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 19 minutes is the average flight time from Houston Hobby to Ontario International.
Southwest Airlines flies direct from Houston Hobby to Ontario International.
As of May 2026, there are 8 flights per week flying from Houston Hobby to Ontario International.
The cheapest month to fly from Houston Hobby to Ontario International is usually August.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Houston Hobby Airport to Ontario International Airport on Wednesday, 19 August 2026.
Yes – the average flight time is 3 hours and 19 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.
Currently, Southwest Airlines offers the cheapest flight tickets to Ontario International.

Travelling from William P. Hobby Airport (HOU) to Ontario International Airport (ONT): what you need to know

  • Around 3 hours 25 minutes is how long you'll be travelling on a direct flight from William P. Hobby Airport to Ontario International Airport.

  • Ontario is two hours behind Houston and follows the UTC-7 timezone.

  • Take your pick of five weekly William P. Hobby Airport to Ontario International Airport flights. The 08:15 departure with Southwest Airlines is the earliest flight you can take. Southwest Airlines operates the latest service of the day at 19:35.

  • Arriving two hours before an international flight and one hour ahead of a domestic departure are golden rules for hassle-free flying. Be at the airport on time to board your HOU to ONT flight.

  • During popular months like July, you'll want to get to the airport earlier than normal. Arrive two hours before domestic departures and four hours ahead of international flights when you fly during peak periods in general.

  • Southwest Airlines is your gateway to exploring Ontario (and perhaps some other great corners of United States!). Check out the direct flights from William P. Hobby Airport to Ontario International Airport offered by this popular carrier.

  • Southwest Airlines tops the list for bookings on this route.

  • Southwest Airlines is the most punctual carrier operating HOU to ONT flights. A reliable 83.33% of its departures on this route land on time.

  • Think about adding a stopover when booking your ticket from William P. Hobby Airport to Ontario International Airport. Simply deselect 'Direct flights only' to break up your journey, or visit a new city along the way. Here are some options between HOU and ONT:

    • Phoenix Sky Harbour International Airport

    • Dallas Love Field Airport

    • Harry Reid Airport (formerly McCarran Airport)

How to find the cheapest flights from William P. Hobby Airport (HOU) to Ontario International Airport (ONT)

  • At the moment, $164 is the lowest price we've found for a one-way William P. Hobby Airport to Ontario International Airport flight. The best price for a return ticket is $326. Remember that fares may change due to demand when booking.

  • Book six months before travelling. After looking at the numbers on our calendar, this is how far you'll want to book ahead to find cheap tickets from HOU to ONT.

  • May is the cheapest month for flights from William P. Hobby Airport to Ontario International Airport. If you'd like to fly during a different time of year, the 'Whole month' tool will show you the lowest airfares for every month.

  • Save time searching for cheap flights from HOU to ONT by creating a Price Alert. We'll send you an email or push notification on the app when a new low fare is offered.

  • Pick your preferred departure and arrival times, number of stops and airlines with the filters. Or sort your results by 'Cheapest' to see the best deals on flights from William P. Hobby Airport to Ontario International Airport.

Handy information about William P. Hobby Airport (HOU)

  • HOU's address is 7800 Airport Boulevard.

  • William P. Hobby Airport has an excellent on-time performance, so you're unlikely to face delays. Departures from HOU land on schedule 81.06% of the time.

  • To get to William P. Hobby Airport from central Houston, it'll take around 20 minutes if you're going by car. Of course, this depends on traffic. It's approximately 19 kilometres from the airport to the city centre.

  • The journey on public transport takes about 1 hour 40 minutes.

  • Have an early flight from William P. Hobby Airport to Ontario International Airport? Avoid the last-minute rush to the terminal (and sneak in some extra precious sleep) by choosing one of these hotels near HOU:

Arriving at Ontario International Airport (ONT)

Getting from Ontario International Airport (ONT) to central Ontario

  • The street address for ONT is 2900 E. Airport Drive.

  • Ontario International Airport to the centre of Ontario has a drive time of around 10 minutes. It's approximately 6 kilometres away.

  • Getting there on public transport takes about 1 hour 30 minutes.

When to fly to Ontario International Airport (ONT)

  • August is the most popular month for flights from William P. Hobby Airport to Ontario International Airport. To steer clear of the crowds, travel to Ontario in May.

  • When reserving your flight from William P. Hobby Airport to Ontario International Airport, consider the kind of weather you like. August is the warmest month in Ontario, with the temperature ranging from 15ºC (59ºF) to 35ºC (95ºF).

  • If you like cooler conditions, search for a cheap ticket from HOU to ONT in January. Average temperatures are between 4ºC (39ºF) and 23ºC (73ºF) then.

Explore more of United States

  • You've seen Ontario, now it's time to explore other parts of United States. Journey about 56 kilometres west to Los Angeles to tick off its popular sights. From Griffith Observatory to The Broad and La Brea Tar Pits & Museum, there's plenty to keep you busy.

  • If there's time to check out another corner of United States, consider San Diego, roughly 153 kilometres south of Ontario. San Diego Zoo, USS Midway Museum and SeaWorld San Diego are key reasons to visit.

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