Flights to Ontario from Seattle - NT$2,218

Cheap Flights from Seattle to Ontario (SEA-QLA)

Prices were available within the past 7 days and start at NT$2,218 for one-way flights and NT$2,998 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Sun, Feb 2 - Tue, Feb 18

SEA

Seattle

ONT

Ontario

NT$2,998 Roundtrip, found 6 days ago

NT$2,998

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Sun, Feb 2 from Seattle to Ontario, returning Tue, Feb 18, priced at NT$2,998 found 6 days ago

Tue, Feb 25 - Wed, Mar 12

SEA

Seattle

ONT

Ontario

NT$3,450 Roundtrip, found 6 days ago

NT$3,450

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Tue, Feb 25 from Seattle to Ontario, returning Wed, Mar 12, priced at NT$3,450 found 6 days ago

Sun, Feb 9 - Sat, Mar 1

SEA

Seattle

ONT

Ontario

NT$3,482 Roundtrip, found 6 days ago

NT$3,482

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Sun, Feb 9 from Seattle to Ontario, returning Sat, Mar 1, priced at NT$3,482 found 6 days ago

Tue, Feb 25 - Sun, Mar 9

SEA

Seattle

ONT

Ontario

NT$3,611 Roundtrip, found 6 days ago

NT$3,611

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Tue, Feb 25 from Seattle to Ontario, returning Sun, Mar 9, priced at NT$3,611 found 6 days ago

Mon, Feb 3 - Wed, Feb 19

SEA

Seattle

ONT

Ontario

NT$3,644 Roundtrip, found 6 days ago

NT$3,644

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Mon, Feb 3 from Seattle to Ontario, returning Wed, Feb 19, priced at NT$3,644 found 6 days ago

Sat, Dec 14 - Tue, Dec 17

SEA

Seattle

ONT

Ontario

NT$4,416 Roundtrip, found 6 days ago

NT$4,416

Roundtrip

found 6 days ago

Select Delta flight, departing Sat, Dec 14 from Seattle to Ontario, returning Tue, Dec 17, priced at NT$4,416 found 6 days ago