$89 Cheap Delta flights Seattle (SEA) to Ontario (ONT)

View $89 flight on Sat, Aug 23, 2025Opens in a new window

$89 Cheap Delta flights Seattle (SEA) to Ontario (ONT)

Prices were available within the past 7 days and start at $89 for one-way flights and $173 for roundtrip, for the period specified. Prices and availability are subject to change. Additional terms apply.
Delta
Sat, Aug 23 - Tue, Aug 26
SEA
Seattle
ONT
Ontario
$173
Roundtrip
Found 1 day ago
Select Delta flight, departing Sat, Aug 23 from Seattle to Ontario, returning Tue, Aug 26, priced at $173 Found 1 day ago
Delta
Sat, Aug 23 - Tue, Aug 26
SEA
Seattle
ONT
Ontario
$177
Roundtrip
Found 1 day ago
Select Delta flight, departing Sat, Aug 23 from Seattle to Ontario, returning Tue, Aug 26, priced at $177 Found 1 day ago
Delta
Sat, Aug 23 - Tue, Aug 26
SEA
Seattle
ONT
Ontario
$208
Roundtrip
Found 1 day ago
Select Delta flight, departing Sat, Aug 23 from Seattle to Ontario, returning Tue, Aug 26, priced at $208 Found 1 day ago
Delta
Sat, Aug 23 - Tue, Aug 26
SEA
Seattle
ONT
Ontario
$242
Roundtrip
Found 1 day ago
Select Delta flight, departing Sat, Aug 23 from Seattle to Ontario, returning Tue, Aug 26, priced at $242 Found 1 day ago
Flights from Seattle (SEA) to Ontario (ONT)
Origin airport
Seattle - Tacoma Intl.
Destination airport
Los Angeles - Ontario Intl.
Airlines serving
Frontier Airlines, Hawaiian Airlines
Popular airline
Frontier Airlines
Distance
1530 km
Average flight time
2 hours 54 mins