$541 Cheap Frontier Airlines flights Ontario (ONT) to Austin (AUS)

View $541 flight on Sun, Dec 21, 2025Opens in a new window

$541 Cheap Frontier Airlines flights Ontario (ONT) to Austin (AUS)

Prices were available within the past 7 days and start at $541 for one-way flights and $666 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Sun, Dec 21 - Sat, Dec 27
ONT
Ontario
AUS
Austin
$666 Roundtrip, found 1 day ago
$666
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Sun, Dec 21 from Ontario to Austin, returning Sat, Dec 27, priced at $666 found 1 day ago

Find the cheapest month to fly from Ontario (ONT) to Austin (AUS)

January is typically the cheapest month to fly

From $112 - $393 per traveler.
Flights from Ontario (ONT) to Austin (AUS)
Origin airport
Los Angeles - Ontario Intl.
Destination airport
Austin-Bergstrom Intl.
Airlines serving
American Airlines, Frontier Airlines, Southwest Airlines, United
Popular airline
United
Distance
1909 km
Average flight time
4 hours 43 mins