$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 $576 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Mon, Dec 22 - Mon, Dec 29
ONT
Ontario
SEA
Seattle
$576 Roundtrip, found 1 day ago
$576
Roundtrip
found 1 day ago
Select American Airlines flight, departing Mon, Dec 22 from Ontario to Seattle, returning Mon, Dec 29, priced at $576 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 $338
SEA
Seattle - Tacoma Intl.
Cheapest
Average driving time to city center20 min
Flights from $338
Flights from Ontario (ONT) to Seattle (SEA)
Origin airport
Los Angeles - Ontario Intl.
Destination airport
Seattle - Tacoma Intl.
Distance
1530 km
Average flight time
2 hours 57 mins