$99 Cheap Delta flights Denver (DEN) to Ontario (ONT)

View $99 flight on Tue, Jan 13, 2026Opens in a new window

$99 Cheap Delta flights Denver (DEN) to Ontario (ONT)

Prices were available within the past 7 days and start at $99 for one-way flights and $133 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Tue, Jan 13 - Tue, Jan 20
DEN
Denver
ONT
Ontario
$133 Roundtrip, found 1 day ago
$133
Roundtrip
found 1 day ago
Select Delta flight, departing Tue, Jan 13 from Denver to Ontario, returning Tue, Jan 20, priced at $133 found 1 day ago
Delta
Tue, Jan 13 - Tue, Jan 20
DEN
Denver
ONT
Ontario
$234 Roundtrip, found 1 day ago
$234
Roundtrip
found 1 day ago
Select Delta flight, departing Tue, Jan 13 from Denver to Ontario, returning Tue, Jan 20, priced at $234 found 1 day ago
Flights from Denver (DEN) to Ontario (ONT)
Origin airport
Denver Intl.
Destination airport
Los Angeles - Ontario Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, Hawaiian Airlines, United
Popular airline
American Airlines
Distance
1306 km
Average flight time
1 hour 18 mins