$265 Cheap American Airlines flights Ontario (ONT) to Denver (DEN)

View $265 flight on Fri, Dec 26, 2025Opens in a new window

$265 Cheap American Airlines flights Ontario (ONT) to Denver (DEN)

Prices were available within the past 7 days and start at $265 for one-way flights and $495 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Mon, Dec 22 - Wed, Dec 31
ONT
Ontario
DEN
Denver
$495 Roundtrip, found 2 days ago
$495
Roundtrip
found 2 days ago
Select American Airlines flight, departing Mon, Dec 22 from Ontario to Denver, returning Wed, Dec 31, priced at $495 found 2 days ago

Find the cheapest month to fly from Ontario (ONT) to Denver (DEN)

February is typically the cheapest month to fly

From $48 - $105 per traveler.
Flights from Ontario (ONT) to Denver (DEN)
Origin airport
Los Angeles - Ontario Intl.
Destination airport
Denver Intl.
Airlines serving
Frontier Airlines
Popular airline
Frontier Airlines
Distance
1306 km
Average flight time
3 hours 13 mins