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Cheap Flights from Austin to Ontario starting at S$ 68

We've found these cheap flights for you. You can book one-way or return flight tickets.

  • One way
  • Round-trip

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

Cheapest time to fly from Austin to Ontario

We monitor flight fares to help you find the best deals effortlessly

Displayed prices are calculated based on the lowest average weekly prices of the corresponding route on Trip.com.
Cheapest Airlines flying 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 S$ 68
Allegiant Air
From S$ 130
Southwest Airlines
From S$ 132
Delta Air Lines
From S$ 134
Spirit Airlines
From S$ 149
American Airlines
From S$ 156
United Airlines
From S$ 157
Alaska Airlines
From S$ 161
ANA airlines

Find more flights and airlines

Alternative Routes from Austin to Ontario

Searching for potential routes that might be cheaper and faster? Check out these alternative flights from Austin to Ontario.

  • Cheapest
    Frontier Airlines
    AUS
    09:06
    16h 53m
    1 transfer
    ONT
    23:59
    Austin-Bergstrom International Airport - Ontario International Airport
    Wed, May 15Frontier Airlines
    S$ 68
  • Frontier Airlines
    AUS
    09:06
    16h 53m
    1 transfer
    ONT
    23:59
    Austin-Bergstrom International Airport - Ontario International Airport
    Wed, May 15Frontier Airlines
    S$ 68
    Find More Flights

Frequently Asked Questions

  • When to buy flight tickets from Austin (AUS) to Ontario (ONT) the cheapest?

    Airlines adjust prices for flights from Austin to Ontario based on the date and time of your booking. By analyzing data from all airlines, on Trip.com, you can find the cheapest flight prices on Tuesdays, Wednesdays, and Saturdays.
  • How much is a flight from Austin (AUS) to Ontario (ONT) cost?

    According to Trip.com's data, the lowest price is around S$ 526.
  • What's the most popular airline for direct flights from Austin (AUS) to Ontario (ONT)?

    Delta Air Lines operates 2 direct flights from Austin (AUS) to Ontario (ONT).

Find cheapest flight ticket from Austin to Ontario

Cheapest direct flight price

S$ 68

Cheapest return ticket price

S$ 163

Cheapest month

February

Peak season for travel

June