$218 Cheap American Airlines flights Ontario (ONT) to Seattle (SEA)

View $218 flight on Mon, Dec 22, 2025Opens in a new window

$218 Cheap American Airlines flights Ontario (ONT) to Seattle (SEA)

Prices were available within the past 7 days and start at $218 for one-way flights and $381 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Fri, Feb 20 - Thu, Feb 26
ONT
Ontario
SEA
Seattle
$381 Roundtrip, found 3 hours ago
$381
Roundtrip
found 3 hours ago
Select American Airlines flight, departing Fri, Feb 20 from Ontario to Seattle, returning Thu, Feb 26, priced at $381 found 3 hours 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 $284
SEA
Seattle - Tacoma Intl.
Cheapest
Average driving time to city center20 min
Flights from $284
Flights from Ontario (ONT) to Seattle (SEA)
Origin airport
Los Angeles - Ontario Intl.
Destination airport
Seattle - Tacoma Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, Hawaiian Airlines, Southwest Airlines, United
Popular airline
Frontier Airlines
Distance
1530 km
Average flight time
2 hours 57 mins