$88 Cheap Alaska Airlines flights Denver (DEN) to Ontario (ONT)

View $88 flight on Tue, Jan 13, 2026Opens in a new window

$88 Cheap Alaska Airlines flights Denver (DEN) to Ontario (ONT)

Prices were available within the past 7 days and start at $88 for one-way flights and $122 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Tue, Jan 13 - Tue, Jan 20
DEN
Denver
ONT
Ontario
$122 Roundtrip, found 4 days ago
$122
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Tue, Jan 13 from Denver to Ontario, returning Tue, Jan 20, priced at $122 found 4 days ago
Alaska Airlines
Tue, Jan 13 - Tue, Jan 20
DEN
Denver
ONT
Ontario
$246 Roundtrip, found 4 days ago
$246
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Tue, Jan 13 from Denver to Ontario, returning Tue, Jan 20, priced at $246 found 4 days ago

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

February is typically the cheapest month to fly

From $48 - $102 per traveler.
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, Southwest Airlines, United
Popular airline
Frontier Airlines
Distance
1306 km
Average flight time
1 hour 21 mins