S$71 Cheap Flights from Chicago to Seattle

View S$71 flight on Tue, 5 Aug, 2025Opens in a new window

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

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Cheap Flights from Chicago to Seattle (CHI-SEA)

Prices were available within the past 7 days and start at S$71 for one-way flights and S$288 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Sat, 12 Jul - Tue, 15 Jul
ORD
Chicago
SEA
Seattle
S$288 Return, found 2 days ago
S$288
Return
found 2 days ago
Select Delta flight, departing Sat, 12 Jul from Chicago to Seattle, returning Tue, 15 Jul, priced at S$288 found 2 days ago
United
Sat, 12 Jul - Tue, 15 Jul
ORD
Chicago
SEA
Seattle
S$302 Return, found 2 days ago
S$302
Return
found 2 days ago
Select United flight, departing Sat, 12 Jul from Chicago to Seattle, returning Tue, 15 Jul, priced at S$302 found 2 days ago
Delta
Tue, 8 Jul - Tue, 15 Jul
ORD
Chicago
SEA
Seattle
S$326 Return, found 3 days ago
S$326
Return
found 3 days ago
Select Delta flight, departing Tue, 8 Jul from Chicago to Seattle, returning Tue, 15 Jul, priced at S$326 found 3 days ago
United
Tue, 8 Jul - Tue, 15 Jul
ORD
Chicago
SEA
Seattle
S$333 Return, found 3 days ago
S$333
Return
found 3 days ago
Select United flight, departing Tue, 8 Jul from Chicago to Seattle, returning Tue, 15 Jul, priced at S$333 found 3 days ago
Delta
Sat, 12 Jul - Tue, 15 Jul
ORD
Chicago
SEA
Seattle
S$346 Return, found 2 days ago
S$346
Return
found 2 days ago
Select Delta flight, departing Sat, 12 Jul from Chicago to Seattle, returning Tue, 15 Jul, priced at S$346 found 2 days ago
United
Sat, 12 Jul - Tue, 15 Jul
ORD
Chicago
SEA
Seattle
S$359 Return, found 2 days ago
S$359
Return
found 2 days ago
Select United flight, departing Sat, 12 Jul from Chicago to Seattle, returning Tue, 15 Jul, priced at S$359 found 2 days ago
Delta
Mon, 21 Jul - Mon, 28 Jul
ORD
Chicago
SEA
Seattle
S$371 Return, found 4 days ago
S$371
Return
found 4 days ago
Select Delta flight, departing Mon, 21 Jul from Chicago to Seattle, returning Mon, 28 Jul, priced at S$371 found 4 days ago
Delta
Sat, 12 Jul - Tue, 15 Jul
ORD
Chicago
SEA
Seattle
S$377 Return, found 2 days ago
S$377
Return
found 2 days ago
Select Delta flight, departing Sat, 12 Jul from Chicago to Seattle, returning Tue, 15 Jul, priced at S$377 found 2 days ago
United
Sat, 12 Jul - Tue, 15 Jul
ORD
Chicago
SEA
Seattle
S$384 Return, found 2 days ago
S$384
Return
found 2 days ago
Select United flight, departing Sat, 12 Jul from Chicago to Seattle, returning Tue, 15 Jul, priced at S$384 found 2 days ago
American Airlines
Tue, 8 Jul - Tue, 15 Jul
ORD
Chicago
SEA
Seattle
S$399 Return, found 3 days ago
S$399
Return
found 3 days ago
Select American Airlines flight, departing Tue, 8 Jul from Chicago to Seattle, returning Tue, 15 Jul, priced at S$399 found 3 days ago
Chicago to Seattle route information
Origin airport
O'Hare Intl.
Destination airport
Seattle - Tacoma Intl.
Return price
S$288
Distance
2745 km

Flights from Illinois to Seattle

When looking for plane tickets from Illinois to Seattle, the ease and convenience of using Expedia simply can’t be beat. With tons of departure points and flights options from the top airline carriers, Expedia gives you the widest array of cheap flights to Seattle. Look for CHI to SEA airfare with the assurance that you have the largest online travel agency working for you.

Expedia lets you search across the largest number of airlines and Seattle flights, which means that you’ll be able to find a great flight deal at the perfect travel date and time. Our simple-to-use booking engine makes looking for terrific bargains easy and hassle-free; just enter your travel dates and departure city, and let Expedia do the rest! Adjust your travel dates and explore connecting flights to find an even better deal on your Illinois Seattle flight!

Browse through dozens of options and rest 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 to Seattle trip. There’s simply no substitute for great prices suited to your travel needs and backed by excellent customer support.

Combine your Seattle flight with a hotel and/or car rental for a package deal designed to save you even more money! Discover additional savings by booking in advance or find a last minute deal. There are tons of ways to save on your flights from Illinois to Seattle with Expedia. Use us as your stop travel destination and have the confidence that you’re getting a bargain!

Frequently asked questions

How much is a flight from Chicago, IL (CHI-All Airports) to SEA?
If you’re travelling between Chicago, IL (CHI-All Airports) and Seattle - Tacoma Intl. Airport (SEA), round-trip flights start from S$288. 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 kilometres. Set up a playlist of your favourite 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

Chicago Airports

Chicago

O'Hare Intl. to Seattle
S$287.80

Madison

Dane County Regional to Seattle
S$462.40
*Available to Expedia members.