Flights From Chicago (CHI) to SeaTac (SEA)
Wander Wisely with exceptional service, 24/7 supportOpens in a new window
Feel at ease with free flight cancellations within 24 hours of booking
Change your flight without a fee on select flights
Selected fares from Chicago to SeaTac
The cheapest prices found with in the last 7 days for return flights were CA $238 and CA $117 for one-way flights to SeaTac for the period specified. Prices and availability are subject to change. Additional terms apply.
Sat., May 17 - Sat., May 24
ORD
O'Hare Intl.
SEA
Seattle - Tacoma Intl.
CA $238 Roundtrip, found 1 day ago
CA $238
Roundtrip
found 1 day ago
Sat., May 24 - Sat., May 31
ORD
O'Hare Intl.
SEA
Seattle - Tacoma Intl.
CA $239 Roundtrip, found 3 days ago
CA $239
Roundtrip
found 3 days ago
Sat., May 31 - Fri., Jun. 6
ORD
O'Hare Intl.
SEA
Seattle - Tacoma Intl.
CA $281 Roundtrip, found 13 hours ago
CA $281
Roundtrip
found 13 hours ago
Save more with SeaTac Flight + Hotel packages
Price found within the past 48 hours. Click for updated prices.
More to explore for Chicago to SeaTac
Flights to Cities near SeaTac
Most Popular
Flights
Flights from Calgary to Yellowstone National ParkFlights from Toronto to Kiawah IslandFlights from Vancouver to Port AngelesFlights from Vancouver to KiheiFlights from Calgary to Kailua-KonaFlights from Winnipeg to OahuFlights from Montreal to Indian WellsFlights from Vancouver to HonoluluFlights from Edmonton to Yellowstone National ParkFlights from Toronto to Pigeon ForgeFlights from Edmonton to MauiFlights from Calgary to MauiFlights from Vancouver to MauiFlights from Vancouver to Tahoe CityFlights from Winnipeg to Kailua-KonaFlights from Ottawa to SunnyvaleFlights from Vancouver to Yellowstone National ParkFlights from Toronto to Tahoe CityFlights from Edmonton to KauaiFlights from Toronto to Yellowstone National ParkFlights from Ottawa to HonoluluFlights from Vancouver to Orcas IslandFlights from Toronto to MauiFlights from Vancouver to KauaiFlights from Vancouver to Cape CanaveralFlights from Toronto to HonoluluFlights from Toronto to Cape CanaveralFlights from Vancouver to ForksFlights from Ottawa to KauaiFlights from Calgary to Hilo