$132 Cheap Alaska Airlines flights Denver (DEN) to Ontario (ONT)

View $132 flight on Tue, May 5, 2026Opens in a new window

$132 Cheap Alaska Airlines flights Denver (DEN) to Ontario (ONT)

Prices were available within the past 7 days and start at $132 for one-way flights and $177 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Tue, May 5 - Sat, May 9
DEN
Denver
ONT
Ontario
$177 Roundtrip, found 2 days ago
$177
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Tue, May 5 from Denver to Ontario, returning Sat, May 9, priced at $177 found 2 days ago
Alaska Airlines
Tue, May 5 - Sat, May 9
DEN
Denver
ONT
Ontario
$335 Roundtrip, found 2 days ago
$335
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Tue, May 5 from Denver to Ontario, returning Sat, May 9, priced at $335 found 2 days ago

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

February is typically the cheapest month to fly

From $48 - $142 per traveler.

Travel information

Origin airport
Denver Intl.
Destination airport
Los Angeles - Ontario Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, Southwest Airlines, United
Popular airline
Frontier Airlines
Distance
1306 km
Average flight time
1 hour 23 mins

Explore a world of travel with Expedia