Cheap Flights from Chicago (ORD) to Seattle (SEA)

View AU$137 flight on Fri, 31 Oct. 2025Opens in a new window

Popular airlines from Chicago O'Hare International Airport (ORD) to Seattle-Tacoma International Airport (SEA)

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Cheap Flights from Chicago (ORD) to Seattle (SEA)

Prices were available within the past 7 days for one-way flights and round trip tickets for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Fri, 31 Oct. - Wed, 5 Nov.
ORD
Chicago
SEA
Seattle
AU$280 Return, found 6 days ago
AU$280
Return
found 6 days ago
Select Delta flight, departing Fri, 31 Oct. from Chicago to Seattle, returning Wed, 5 Nov., priced at AU$280 found 6 days ago
Alaska Airlines
Sat, 1 Nov. - Sat, 8 Nov.
ORD
Chicago
SEA
Seattle
AU$288 Return, found 6 days ago
AU$288
Return
found 6 days ago
Select Alaska Airlines flight, departing Sat, 1 Nov. from Chicago to Seattle, returning Sat, 8 Nov., priced at AU$288 found 6 days ago
Alaska Airlines
Sat, 13 Sep. - Sat, 20 Sep.
ORD
Chicago
SEA
Seattle
AU$289 Return, found 1 day ago
AU$289
Return
found 1 day ago
Select Alaska Airlines flight, departing Sat, 13 Sep. from Chicago to Seattle, returning Sat, 20 Sep., priced at AU$289 found 1 day ago
American Airlines
Sat, 13 Sep. - Sat, 20 Sep.
ORD
Chicago
SEA
Seattle
AU$290 Return, found 1 day ago
AU$290
Return
found 1 day ago
Select American Airlines flight, departing Sat, 13 Sep. from Chicago to Seattle, returning Sat, 20 Sep., priced at AU$290 found 1 day ago
Alaska Airlines
Fri, 31 Oct. - Mon, 10 Nov.
ORD
Chicago
SEA
Seattle
AU$301 Return, found 6 days ago
AU$301
Return
found 6 days ago
Select Alaska Airlines flight, departing Fri, 31 Oct. from Chicago to Seattle, returning Mon, 10 Nov., priced at AU$301 found 6 days ago
Delta
Fri, 31 Oct. - Sun, 9 Nov.
ORD
Chicago
SEA
Seattle
AU$302 Return, found 6 days ago
AU$302
Return
found 6 days ago
Select Delta flight, departing Fri, 31 Oct. from Chicago to Seattle, returning Sun, 9 Nov., priced at AU$302 found 6 days ago
Alaska Airlines
Sat, 13 Sep. - Sat, 20 Sep.
ORD
Chicago
SEA
Seattle
AU$304 Return, found 1 day ago
AU$304
Return
found 1 day ago
Select Alaska Airlines flight, departing Sat, 13 Sep. from Chicago to Seattle, returning Sat, 20 Sep., priced at AU$304 found 1 day ago
Alaska Airlines
Sat, 13 Sep. - Sat, 20 Sep.
ORD
Chicago
SEA
Seattle
AU$305 Return, found 1 day ago
AU$305
Return
found 1 day ago
Select Alaska Airlines flight, departing Sat, 13 Sep. from Chicago to Seattle, returning Sat, 20 Sep., priced at AU$305 found 1 day ago
Alaska Airlines
Sat, 1 Nov. - Mon, 10 Nov.
ORD
Chicago
SEA
Seattle
AU$308 Return, found 6 days ago
AU$308
Return
found 6 days ago
Select Alaska Airlines flight, departing Sat, 1 Nov. from Chicago to Seattle, returning Mon, 10 Nov., priced at AU$308 found 6 days ago
United
Sat, 13 Sep. - Sat, 20 Sep.
ORD
Chicago
SEA
Seattle
AU$428 Return, found 1 day ago
AU$428
Return
found 1 day ago
Select United flight, departing Sat, 13 Sep. from Chicago to Seattle, returning Sat, 20 Sep., priced at AU$428 found 1 day ago

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

September is typically the cheapest month to fly

From AU$143 - AU$265 per traveller.

Graph displaying average flight prices per month

Flight from Chicago to Seattle route information
Origin airport
O'Hare Intl.
Destination airport
Seattle - Tacoma Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, United
Return price
AU$255
Distance
2745 km
Average flight time
2 hours 34 mins

Your quick guide to flights from Chicago to Seattle

Pick up great flights from Chicago to Seattle

With Expedia, you have your pick of 74 flights a day with 20 airlines covering flights from Chicago to Seattle. Whether you’re on a business trip, a family holiday or a luxury break, just enter your travel dates, hit search then check out your choice of flights. Select from return, one way or multi-city flights, and use the advance search tool if you want a direct or refundable flight. You can narrow your search to show you just your preferred cabin class and airline, too. It’s all easy. You can book direct flights from Chicago to Seattle that take around 4 hours.

Find cheap flights from Chicago to Seattle

From the great flight deals with prices currently ranging from AU$280 to AU$428, you can choose to see the cheapest flights first. Generally, you can book the cheapest flights from Chicago to Seattle around 4 to 6 weeks in advance. If your travel dates are flexible, try to avoid weekends and peak seasons – when you are more likely to grab the lowest prices. Even last minute, there are some impressive deals. The cheapest time to fly to Seattle is normally in October.

Reasons to book your flight from Chicago to Seattle with Expedia

Expedia makes it easy to find, book, and travel, with everything you need all in one place. When you enter your travel details, find fantastic deals just for you on flight tickets from Chicago to Seattle across all the main airline carriers, so you can save time, dollars, and hassle finding the perfect flight. If you think your plans could change, choose refundable flights so any changes won’t cost you more. Book your flight to Seattle right now and, if you join Expedia Rewards, you earn points this time and every time you travel with Expedia.

Frequently asked questions

How much is a flight from O'Hare Intl. Airport (ORD) to Sea-Tac Airport?
Within the past 7 days on Expedia, for flights departing within the next year, the lowest price quoted for a round-trip journey between O'Hare Airport and SEA was AU$280. Fares this good don't last forever, so book yours today. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from O'Hare Airport to SEA?
We understand that life can throw the odd curveball, so we've made it as easy as possible for you to cancel your flight online. Just head to the Customer Service Portal and follow the instructions.
How do I find cheap flights from ORD 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 O'Hare Airport 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 O'Hare Intl. Airport (ORD) to Sea-Tac Airport?
The flying distance from ORD to Seattle - Tacoma Intl. Airport (SEA) is 2 800 kilometres. Close your eyes or read a good book and the journey will zip by.
Which airlines fly direct from ORD to Seattle - Tacoma Intl. Airport (SEA)?
It's a breeze to fly directly from O'Hare Intl. Airport (ORD) to Seattle - Tacoma Intl. Airport (SEA). These are the top carriers that operate nonstop services on this route:

  • 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 O'Hare Airport to Sea-Tac Airport flight tickets cheaper when they're purchased at the last minute?
Late planners can occasionally find a bargain, with some of the cheapest airfares from O'Hare Airport to Sea-Tac Airport showing up a few weeks before the departure date. If you'd rather book ahead of time, Expedia compares and updates all the best flight deals continually — as early as 12 months in advance in some cases. It depends on the carrier though, as not all airlines advertise prices that far in advance.

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