Cheap Flights to Castle Rock

View ₩564,000 flight on Sun, Dec 21, 2025Opens in a new window

Popular airlines to Castle Rock

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How much is the cheapest flight to Castle Rock?

Prices were available within the past 7 days and start at ₩564,000 for one-way flights and ₩663,642 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Korean Air
Mon, Mar 23 - Sun, Mar 29
ICN
Seoul
SEA
Seattle
₩663,642 Roundtrip, found 4 days ago
₩663,642
Roundtrip
found 4 days ago
Select Korean Air flight, departing Mon, Mar 23 from Seoul to Seattle, returning Sun, Mar 29, priced at ₩663,642 found 4 days ago
Air Canada
Sat, Feb 21 - Sun, Mar 22
ICN
Seoul
SEA
Seattle
₩777,600 Roundtrip, found 6 days ago
₩777,600
Roundtrip
found 6 days ago
Select Air Canada flight, departing Sat, Feb 21 from Seoul to Seattle, returning Sun, Mar 22, priced at ₩777,600 found 6 days ago
American Airlines
Tue, Nov 18 - Tue, Nov 25
ICN
Seoul
SEA
Seattle
₩859,900 Roundtrip, found 4 days ago
₩859,900
Roundtrip
found 4 days ago
Select American Airlines flight, departing Tue, Nov 18 from Seoul to Seattle, returning Tue, Nov 25, priced at ₩859,900 found 4 days ago
Alaska Airlines
Mon, Nov 24 - Thu, Nov 27
ICN
Seoul
PDX
Portland
₩867,200 Roundtrip, found 6 days ago
₩867,200
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Mon, Nov 24 from Seoul to Portland, returning Thu, Nov 27, priced at ₩867,200 found 6 days ago
Hawaiian Airlines
Mon, Dec 22 - Sat, Jan 3
ICN
Seoul
PDX
Portland
₩867,600 Roundtrip, found 4 days ago
₩867,600
Roundtrip
found 4 days ago
Select Hawaiian Airlines flight, departing Mon, Dec 22 from Seoul to Portland, returning Sat, Jan 3, priced at ₩867,600 found 4 days ago

Find the cheapest month to fly from Columbus (CMH) to Seattle (SEA)

January is typically the cheapest month to fly

From ₩192,530 - ₩440,599 per traveler.

Book with confidence

Searching for cheap flights to Castle Rock? No travel company presents more choices than Expedia if you're looking to compare flights to Castle Rock. With more airlines, cheaper flights, fewer stops, and more departure and arrival times travellers should ensure they search on Expedia before any holiday to Washington. Expedia provides the cheapest flights to many destinations in Washington and you may find even greater savings if you combine your flight with a hotel stay in Castle Rock.

Travel information

Destination airport
Portland Intl.
Destination airport IATA code
PDX
Destination city name
Portland
Roundtrip price
₩204,100

Trending flights to Castle Rock

Prices were available within the past 7 days and start at ₩564,000 for one-way flights and ₩663,642 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Korean Air
Mon, Mar 23 - Sun, Mar 29
ICN
Seoul
SEA
Seattle
₩663,642 Roundtrip, found 4 days ago
₩663,642
Roundtrip
found 4 days ago
Select Korean Air flight, departing Mon, Mar 23 from Seoul to Seattle, returning Sun, Mar 29, priced at ₩663,642 found 4 days ago

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