Cheap Flights from Austin-Bergstrom to Ontario International

Compare Austin-Bergstrom 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 Austin-Bergstrom to Ontario International

Looking for a cheap last-minute deal or the best return flight from Austin-Bergstrom to Ontario International? Find the lowest prices on one-way and return tickets right here.

Find the cheapest month to fly from Austin-Bergstrom to Ontario International

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

Direct flights from Austin-Bergstrom to Ontario International

Austin to Ontario: Flight information

The things to know before you go.
Cheapest flight foundج.م.‏ 3,547
Cheapest month to flyMarch
Average flight time3 hrs, 7 mins
Most popular airlineSouthwest Airlines
Average flights per week7

Finding cheap flights from Austin-Bergstrom to Ontario International: Frequently asked questions

The best price we found for a return flight from Austin-Bergstrom to Ontario International is ج.م.‏ 6,067. 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 7 minutes is the average flight time from Austin-Bergstrom to Ontario International.
Southwest Airlines flies direct from Austin-Bergstrom to Ontario International.
As of February 2026, there are 7 flights per week flying from Austin-Bergstrom to Ontario International.
The cheapest month to fly from Austin-Bergstrom to Ontario International is usually April.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Austin-Bergstrom Airport to Ontario International Airport on Wednesday, 15 April 2026.
Yes – the average flight time is 3 hours and 7 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, Frontier Airlines and Southwest Airlines offer the cheapest flight tickets to Ontario International.

Flying from Austin-Bergstrom International Airport (AUS) to Ontario International Airport (ONT): what you need to know

  • Hop on a direct flight from Austin-Bergstrom International Airport to Ontario International Airport and you'll be travelling for an average of 3 hours 5 minutes.

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

  • You can choose from five weekly Austin-Bergstrom International Airport to Ontario International Airport flights. The 10:40 departure with Southwest Airlines is the earliest flight available. Southwest Airlines operates the last service of the day at 20:40.

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

  • Be prepared for longer lines in popular months such as July. Arriving up to four hours in advance for international flights and two hours for a domestic departure is a smart move.

  • Jetting into Ontario (and then seeing more of United States!) is a snap with Southwest Airlines. This popular carrier offers direct flights from Austin-Bergstrom International Airport to Ontario International Airport.

  • Southwest Airlines has the highest passenger demand on this route.

  • Southwest Airlines is the most punctual carrier operating AUS to ONT flights, with 79.66% of its services arriving as scheduled.

  • Consider adding a stopover when booking your ticket from Austin-Bergstrom International Airport to Ontario International Airport. Simply uncheck 'Direct flights only' to break up your journey, or perhaps explore a new destination along the way. Here are some options between AUS and ONT:

    • Phoenix Sky Harbour International Airport

    • Harry Reid Airport (formerly McCarran Airport)

    • Dallas/Fort Worth International Airport

How to find the cheapest flights from Austin-Bergstrom International Airport (AUS) to Ontario International Airport (ONT)

  • Right now, ج.م.‏ 3,547 is the cheapest price we've seen for a one-way Austin-Bergstrom International Airport to Ontario International Airport flight. The best price for a return plane ticket is ج.م.‏ 6,067. Remember that fares can change due to availability at the time of booking.

  • Book nine months before your departure date. After looking at the numbers on our calendar, this is how far you should book ahead to secure cheap tickets from AUS to ONT.

  • August is the cheapest month for flights from Austin-Bergstrom International Airport to Ontario International Airport. If you're looking to fly at a different time of year, the 'Whole month' tool will give you the lowest prices for every month.

  • You don't need to check back in every day to find out if fares have gone down when you set up a Price Alert. We'll let you know as soon as there's a change in price on cheap flights from AUS to ONT.

  • Tailor your flights with filters. Pick your ideal arrival and departure times, total journey duration and airlines. You can also sort the results by 'Cheapest,' 'Best' or 'Fastest' flights from Austin-Bergstrom International Airport to Ontario International Airport.

Handy information about Austin-Bergstrom International Airport (AUS)

  • You'll find AUS at 3600 Presidential Blvd.

  • Austin-Bergstrom International Airport gets high marks for its on-time performance. 81.23% of flights that take off from AUS land on time.

  • Central Austin to Austin-Bergstrom International Airport is approximately 19 kilometres. Depending on traffic, it'll take you about 25 minutes to get there if you're driving, ride-sharing or catching a cab.

  • Planning to catch public transport? You can expect a journey time of around 3 hours 25 minutes.

  • Taking an early flight from Austin-Bergstrom International Airport to Ontario International Airport? Avoid the stress of rushing to the terminal (and enjoy a little extra shut-eye) by choosing one of these hotels close to AUS:

Arriving at Ontario International Airport (ONT)

Getting from Ontario International Airport (ONT) to central Ontario

  • You'll find ONT at 2900 E. Airport Drive.

  • Ontario International Airport is roughly 6 kilometres from central Ontario. Driving there takes about 10 minutes.

  • It takes roughly 1 hour 30 minutes to get there using public transport.

When to fly to Ontario International Airport (ONT)

  • August is the busiest month for flights from Austin-Bergstrom International Airport to Ontario International Airport. For a quieter experience, head to Ontario in May.

  • Before locking in your flight from Austin-Bergstrom International Airport to Ontario International Airport, consider the type of weather you enjoy. August is the warmest month in Ontario, with the temperature ranging from 15ºC to 35ºC.

  • January sees average temperatures of between 4ºC and 23ºC. Search for cheap tickets from AUS to ONT sometime then if you like cooler conditions.

Explore more of United States

  • Ontario has plenty to offer, but there are so many other corners of United States you'll want to see. About 56 kilometres west of Ontario, a visit to Los Angeles will keep your itinerary busy. Start with leading sights like Griffith Observatory, The Broad and La Brea Tar Pits & Museum.

  • If you're interested in discovering another great destination in United States, head for San Diego, about 153 kilometres south of Ontario. San Diego Zoo, USS Midway Museum and SeaWorld San Diego are among its highlights.

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