$44 Find Cheap Flights from Austin to Ontario

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Find cheap flights from Austin to Ontario starting at $44.

Book one-way or return flights from Austin to Ontario from as little as $44. Choose from the popular airlines below and book your flight today!

One way
Round-trip

Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.

Searching for the best last minute flight from Austin to Ontario? Find one-way or return flights that are affordable and fit your itinerary.

Trip.com monitors the ticket fares of flights from Austin to Ontario. Stay updated on price trends and snag the best deals for your upcoming trip.

Displayed prices are calculated based on the cheapest average weekly prices of the corresponding route on Trip.com.

Find cheap airlines flights from Austin to Ontario

View airlines operating flights from Austin to Ontario. Compare prices, find the option that best suits your travel needs, and enjoy a comfortable journey with a trusted airline.

Frontier Airlines

From $44

Spirit Airlines

From $52

American Airlines

From $78

Allegiant Air

From $87

Delta Air Lines

From $102

United Airlines

From $115

Southwest Airlines

From $117

Alaska Airlines

From $138

ANA airlines

Find more flights and airlines

Find cheap flights from Austin to Ontario by different airports

Discover different routes, airlines, and transfers and find the best alternative flights for your journey from Austin to Ontario.

Cheapest
AUS
15:55
10h 4m
1 transfer
ONT
23:59
Austin–Bergstrom International Airport - Ontario International Airport
Tue, May 7Frontier Airlines
$44
AUS
15:55
10h 4m
1 transfer
ONT
23:59
Austin–Bergstrom International Airport - Ontario International Airport
Tue, May 7Frontier Airlines
$44
Find More Flights

Frequently Asked Questions

When are flight tickets from Austin (AUS) to Ontario (ONT) the cheapest?
Airlines adjust prices for flights from Austin to Ontario based on the departure date and time of your selection. By analyzing data from all airlines, we've discovered that on Trip.com, you can find the lowest flight prices on Tuesdays, Wednesdays, and Saturdays.
How much do flights from Austin (AUS) to Ontario (ONT) cost?
According to Trip.com's data, the lowest price is around $323.

How to find a cheap flight from Austin to Ontario

Wait until the last minute and flight costs are often sky-high. Plan ahead, book the right way, and your savings can soar. We have loads of saving tips to help you find a cheap flight from Austin to Ontario. Book your flights at the right time and save more.

Book Early

Once prices are gone, they're gone. Lock in deals while you can!

Compare Flight Prices

Compare prices on travel agency and airline websites.

Look Out for Deals

Check airline and travel agency websites for latest flight deals

Check One-way Fares

Buying two cheap one-way flights can sometimes be a better deal than a round-trip.

Try Different Dates

Flying during the week, early in the morning, or late at night can help save money.

Use the Trip.com App

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Austin to Ontario Flight Information

Cheapest nonstop flight price	$44
Cheapest round-trip ticket price	$154
Off-season for travel	February
Peak season for travel	June
Flight distance	10,754.2km
Popular airline	Alaska Airlines