NT$3,097 Cheap Flights from Chicago (CHI) to Seattle (SEA)

View NT$3,097 flight on Sat, 2026/5/9Opens in a new window

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

  • Be in the know

    Get alerts if flight prices drop or rise*

  • Book smarter

    Save up to 45% on select hotels after you book a flight*

  • Earn twice

    Earn your airline miles on top of our rewards
    Sign in

Cheap Flights from Chicago to Seattle (CHI-SEA)

Prices were available within the past 7 days and start at NT$3,097 for one-way flights and NT$5,597 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Mon, Mar 2 - Mon, Mar 16
ORD
Chicago
SEA
Seattle
NT$5,597 Roundtrip, found 3 days ago
NT$5,597
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Mon, Mar 2 from Chicago to Seattle, returning Mon, Mar 16, priced at NT$5,597 found 3 days ago
Delta
Fri, Mar 6 - Tue, Mar 17
ORD
Chicago
SEA
Seattle
NT$5,602 Roundtrip, found 3 days ago
NT$5,602
Roundtrip
found 3 days ago
Select Delta flight, departing Fri, Mar 6 from Chicago to Seattle, returning Tue, Mar 17, priced at NT$5,602 found 3 days ago
Alaska Airlines
Wed, Apr 1 - Tue, Apr 14
ORD
Chicago
SEA
Seattle
NT$5,913 Roundtrip, found 3 days ago
NT$5,913
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Wed, Apr 1 from Chicago to Seattle, returning Tue, Apr 14, priced at NT$5,913 found 3 days ago
Delta
Wed, Apr 1 - Sat, Apr 18
ORD
Chicago
SEA
Seattle
NT$5,918 Roundtrip, found 3 days ago
NT$5,918
Roundtrip
found 3 days ago
Select Delta flight, departing Wed, Apr 1 from Chicago to Seattle, returning Sat, Apr 18, priced at NT$5,918 found 3 days ago
Alaska Airlines
Fri, Mar 6 - Thu, Mar 19
ORD
Chicago
SEA
Seattle
NT$6,229 Roundtrip, found 3 days ago
NT$6,229
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Fri, Mar 6 from Chicago to Seattle, returning Thu, Mar 19, priced at NT$6,229 found 3 days ago
Delta
Fri, Apr 3 - Fri, Apr 17
ORD
Chicago
SEA
Seattle
NT$6,235 Roundtrip, found 3 days ago
NT$6,235
Roundtrip
found 3 days ago
Select Delta flight, departing Fri, Apr 3 from Chicago to Seattle, returning Fri, Apr 17, priced at NT$6,235 found 3 days ago
Alaska Airlines
Wed, Feb 11 - Wed, Feb 25
ORD
Chicago
SEA
Seattle
NT$6,415 Roundtrip, found 1 day ago
NT$6,415
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Wed, Feb 11 from Chicago to Seattle, returning Wed, Feb 25, priced at NT$6,415 found 1 day ago
Delta
Wed, Feb 11 - Tue, Mar 3
ORD
Chicago
SEA
Seattle
NT$6,421 Roundtrip, found 1 day ago
NT$6,421
Roundtrip
found 1 day ago
Select Delta flight, departing Wed, Feb 11 from Chicago to Seattle, returning Tue, Mar 3, priced at NT$6,421 found 1 day ago
American Airlines
Sat, Feb 28 - Thu, Mar 12
ORD
Chicago
SEA
Seattle
NT$8,449 Roundtrip, found 3 days ago
NT$8,449
Roundtrip
found 3 days ago
Select American Airlines flight, departing Sat, Feb 28 from Chicago to Seattle, returning Thu, Mar 12, priced at NT$8,449 found 3 days ago
United
Sun, Mar 1 - Sun, Mar 22
ORD
Chicago
SEA
Seattle
NT$9,081 Roundtrip, found 3 days ago
NT$9,081
Roundtrip
found 3 days ago
Select United flight, departing Sun, Mar 1 from Chicago to Seattle, returning Sun, Mar 22, priced at NT$9,081 found 3 days ago

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 center is 20 minutes. Flights from NT$7,422
SEA
Seattle - Tacoma Intl.
Cheapest
Average driving time to city center20 min
Flights from NT$7,422
Flights from Chicago (ORD) to Seattle (SEA)
Origin airport
O'Hare Intl.
Destination airport
Seattle - Tacoma Intl.
Airlines serving
Alaska Airlines, Delta
Roundtrip price
NT$5,597
Distance
2745 km

Illinois to Seattle Flights

Sometimes you just need to get out of town or maybe you’re looking for a change of scenery. Regardless of the reason, a flight from Illinois to Seattle will do just the trick! Go on, plan to see all the famous landmarks and eat your weight in the local cuisine. Your trip is beckoning, so answer the call by packing your suitcase and filling your travel itinerary with exploring Seattle.

Whether you’re flying for business or jet-setting on your personal time, you’ve come to the right place. Here at Expedia.com, we’ll pair you up with CHI to SEA flights that won’t make your bank account wince. Ready to temporarily leave behind Illinois for new horizons? Browse through our cheap airfare, and filter by flight times and dates until you find just what you had in mind. From flights without layovers to ones that arrive early in the morning, you’ll come across plane tickets that suit your travel preferences. You can even bundle your flight to SEA with hotels and car rentals to score even bigger savings.

All set to hit the clouds? Book your travel arrangements with us today and have left-over money to put toward your travel outings and adventures.

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 NT$5,597. 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.

Explore a world of travel with Expedia

*Available to Expedia members.