$70 Cheap Alaska Airlines flights Ontario (ONT) to Seattle (SEA)

View $70 flight on Tue, Jan 27, 2026Opens in a new window

$70 Cheap Alaska Airlines flights Ontario (ONT) to Seattle (SEA)

Prices were available within the past 7 days and start at $70 for one-way flights and $248 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Tue, Jan 27 - Fri, Feb 13
ONT
Ontario
SEA
Seattle
$248 Roundtrip, found 1 day ago
$248
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Tue, Jan 27 from Ontario to Seattle, returning Fri, Feb 13, priced at $248 found 1 day ago

Find the cheapest month to fly from Ontario (ONT) to Seattle (SEA)

November is typically the cheapest month to fly

From $79 - $214 per traveler.

Alternative airports near Seattle

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Seattle - Tacoma Intl. SEA. Cheapest option available. Average driving time to city center is 20 minutes. Flights from $267
SEA
Seattle - Tacoma Intl.
Cheapest
Average driving time to city center20 min
Flights from $267
Flights from Ontario (ONT) to Seattle (SEA)
Origin airport
Los Angeles - Ontario Intl.
Destination airport
Seattle - Tacoma Intl.
Airlines serving
Alaska Airlines, Delta, Frontier Airlines, Hawaiian Airlines
Popular airline
Alaska Airlines
Distance
1530 km
Average flight time
2 hours 56 mins