Cheap Flights from Chicago (CHI) to Seattle (SEA) from HK$702~

View HK$702 flight on Sun, 15 Feb 2026Opens in a new window

Popular airlines from Chicago to Seattle, WA (SEA-Seattle - Tacoma Intl.)

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Find Cheap Flights from Chicago (CHI) to Seattle (SEA)

Prices were available within the past 7 days and start at HK$702 for one-way flights and HK$1,382 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Thu, 12 Feb - Tue, 17 Feb
ORD
Chicago
SEA
Seattle
HK$1,382 Return, found 1 day ago
HK$1,382
Return
found 1 day ago
Select Alaska Airlines flight, departing Thu, 12 Feb from Chicago to Seattle, returning Tue, 17 Feb, priced at HK$1,382 found 1 day ago
Delta
Sun, 15 Feb - Thu, 19 Feb
ORD
Chicago
SEA
Seattle
HK$1,393 Return, found 1 day ago
HK$1,393
Return
found 1 day ago
Select Delta flight, departing Sun, 15 Feb from Chicago to Seattle, returning Thu, 19 Feb, priced at HK$1,393 found 1 day ago
Alaska Airlines
Thu, 12 Feb - Mon, 16 Feb
ORD
Chicago
SEA
Seattle
HK$1,694 Return, found 1 day ago
HK$1,694
Return
found 1 day ago
Select Alaska Airlines flight, departing Thu, 12 Feb from Chicago to Seattle, returning Mon, 16 Feb, priced at HK$1,694 found 1 day ago
Delta
Sun, 15 Feb - Thu, 19 Feb
ORD
Chicago
SEA
Seattle
HK$1,695 Return, found 1 day ago
HK$1,695
Return
found 1 day ago
Select Delta flight, departing Sun, 15 Feb from Chicago to Seattle, returning Thu, 19 Feb, priced at HK$1,695 found 1 day ago
American Airlines
Sun, 15 Feb - Thu, 19 Feb
ORD
Chicago
SEA
Seattle
HK$1,748 Return, found 1 day ago
HK$1,748
Return
found 1 day ago
Select American Airlines flight, departing Sun, 15 Feb from Chicago to Seattle, returning Thu, 19 Feb, priced at HK$1,748 found 1 day ago
Delta
Fri, 30 Jan - Thu, 5 Feb
ORD
Chicago
SEA
Seattle
HK$1,855 Return, found 6 days ago
HK$1,855
Return
found 6 days ago
Select Delta flight, departing Fri, 30 Jan from Chicago to Seattle, returning Thu, 5 Feb, priced at HK$1,855 found 6 days ago
Delta
Sun, 15 Feb - Thu, 19 Feb
ORD
Chicago
SEA
Seattle
HK$2,007 Return, found 1 day ago
HK$2,007
Return
found 1 day ago
Select Delta flight, departing Sun, 15 Feb from Chicago to Seattle, returning Thu, 19 Feb, priced at HK$2,007 found 1 day ago
Delta
Sun, 15 Feb - Thu, 19 Feb
ORD
Chicago
SEA
Seattle
HK$2,009 Return, found 1 day ago
HK$2,009
Return
found 1 day ago
Select Delta flight, departing Sun, 15 Feb from Chicago to Seattle, returning Thu, 19 Feb, priced at HK$2,009 found 1 day ago
Delta
Sun, 15 Feb - Thu, 19 Feb
ORD
Chicago
SEA
Seattle
HK$2,051 Return, found 1 day ago
HK$2,051
Return
found 1 day ago
Select Delta flight, departing Sun, 15 Feb from Chicago to Seattle, returning Thu, 19 Feb, priced at HK$2,051 found 1 day ago
United
Sun, 15 Feb - Thu, 19 Feb
ORD
Chicago
SEA
Seattle
HK$2,060 Return, found 1 day ago
HK$2,060
Return
found 1 day ago
Select United flight, departing Sun, 15 Feb from Chicago to Seattle, returning Thu, 19 Feb, priced at HK$2,060 found 1 day ago

Find the cheapest month to fly from Chicago (CHI) to Seattle (SEA)

September is typically the cheapest month to fly

From HK$847 - HK$2,357 per traveller.

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 centre is 20 minutes. Flights from HK$1,855
SEA
Seattle - Tacoma Intl.
Cheapest
Average driving time to city centre20 min
Flights from HK$1,855
Chicago to Seattle route information
Origin airport
O'Hare Intl.
Destination airport
Seattle - Tacoma Intl.
Airlines serving
American Airlines, Delta, United
Return price
HK$1,382
Distance
2745 km

Flights from Illinois to Seattle

Book cheap flights from Illinois (CHI) to Seattle (SEA) on Expedia.com.hk. Find the best flight deals to destinations around the world for your next leisure or business travel on Expedia.com.hk.

Search for flights from Illinois (CHI) to Seattle (SEA) to find great flight deals suitable to your travel date and time. Expedia.com.hk flight booking search engine is simple to use and looking for cheap flights is as easy as a click of a mouse or on your mobile devices.

Be assured that you’re seeing the best price guaranteed! Our friendly customer service representatives are here to serve you 24 hours day to provide assistance and answer any questions that you may have about booking your Illinois (CHI) to Seattle (SEA) trip. Call us at 3077-4857 (direct number - 24 hours day for English).

Save more when combine your Seattle flight with a hotel for a package deal! Discover additional savings by booking in advance. Now you can find activities in Seattle and things to do in Seattle for your perfect vacation with Expedia Thing to Do.

If you would like to book flights to Seattle more flexibly, many prefer to purchase one-way tickets with options to take different airlines. A one way ticket to Seattle is HK$702 now!

 

Frequently asked questions

How much is a flight from Chicago, IL (CHI-All Airports) to SEA?
If you're traveling between Chicago, IL (CHI-All Airports) and Seattle - Tacoma Intl. Airport (SEA), round-trip flights start from HK$1,382. This price is based on fares available within the last 7 days on Expedia for flights departing within the next year, so don't hang around. Book today and save yourself both money and time. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from Chicago, IL (CHI-All Airports) to Sea-Tac Airport?
We understand that things crop up unexpectedly, so we've made it as simple as possible for you to cancel your trip online. Just head to the Customer Service Portal and follow the instructions.
How do I find cheap flights from Chicago, IL (CHI-All Airports) to Seattle - Tacoma Intl. Airport (SEA) that have flexible change policies?
Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you're searching for Chicago, IL (CHI-All Airports) to Seattle - Tacoma Intl. Airport (SEA) flights, you'll see a "no change fees" filter for you to select.
How far is the flight from Chicago, IL (CHI-All Airports) to Seattle - Tacoma Intl. Airport (SEA)?
Expect to be up above the clouds for a while, as the flight distance between Chicago, IL (CHI-All Airports) and Sea-Tac Airport is 2,700 kilometers. Set up a playlist of your favorite tunes before leaving home to stay entertained during the trip.
Which airlines fly direct from Chicago, IL (CHI-All Airports) to Seattle - Tacoma Intl. Airport (SEA)?
Take a look at the deals on offer with these sought-after carriers and book your ticket from Chicago, IL (CHI-All Airports) to Sea-Tac Airport today:

  • Alaska Airlines - (AS) with 134 monthly flights
  • United Airlines - (UA) with 117 monthly flights
  • Delta Air Lines - (DL) with 69 monthly flights
  • American Airlines - (AA) with 60 monthly flights

Are Chicago, IL (CHI-All Airports) to Sea-Tac Airport flight tickets cheaper when they're purchased at the last minute?
Booking last minute from Chicago, IL (CHI-All Airports) to Sea-Tac Airport can be hit-or-miss. It is possible to find a bargain, but then again, you could miss out altogether! If you'd prefer to start your trip planning early, Expedia compares flight deals up to 12 months in advance. Just remember that not all airlines advertise their prices so far in advance. Our top tip? Check back often as prices are updated frequently.

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