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Flights from Seattle to Illinois

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Flight deals from Seattle to Illinois

Looking for cheap tickets from Seattle to Illinois, or a last-minute trip? Find the lowest prices on one-way and return tickets right here.
Chicago.HK$1,245 per passenger.Departing Sat, 3 May, returning Tue, 6 May.Return flight with Hawaiian Airlines and Alaska Airlines.Outbound direct flight with Hawaiian Airlines departs from Seattle / Tacoma International on Sat, 3 May, arriving in Chicago O'Hare International.Inbound direct flight with Alaska Airlines departs from Chicago O'Hare International on Tue, 6 May, arriving in Seattle / Tacoma International.Price includes taxes and charges.From HK$1,245, select.
Decatur.HK$2,565 per passenger.Departing Sat, 19 Apr, returning Wed, 23 Apr.Return flight with United.Outbound indirect flight with United, departs from Seattle / Tacoma International on Sat, 19 Apr, arriving in Decatur.Inbound indirect flight with United, departs from Decatur on Wed, 23 Apr, arriving in Seattle / Tacoma International.Price includes taxes and charges.From HK$2,565, select.
Moline.HK$2,892 per passenger.Departing Sun, 27 Apr, returning Fri, 2 May.Return flight with United.Outbound indirect flight with United, departs from Seattle / Tacoma International on Sun, 27 Apr, arriving in Moline.Inbound indirect flight with United, departs from Moline on Fri, 2 May, arriving in Seattle / Tacoma International.Price includes taxes and charges.From HK$2,892, select.
Peoria.HK$3,624 per passenger.Departing Thu, 17 Apr, returning Mon, 21 Apr.Return flight with Spirit Airlines and Allegiant Air.Outbound indirect flight with Spirit Airlines, departs from Seattle / Tacoma International on Thu, 17 Apr, arriving in Greater Peoria.Inbound indirect flight with Allegiant Air, departs from Greater Peoria on Mon, 21 Apr, arriving in Seattle / Tacoma International.Price includes taxes and charges.From HK$3,624, select.
Bloomington.HK$4,108 per passenger.Departing Sun, 20 Apr, returning Thu, 24 Apr.Return flight with Delta.Outbound indirect flight with Delta, departs from Seattle / Tacoma International on Sun, 20 Apr, arriving in Central Illinois Regional.Inbound indirect flight with Delta, departs from Central Illinois Regional on Thu, 24 Apr, arriving in Seattle / Tacoma International.Price includes taxes and charges.From HK$4,108, select.
Marion.HK$4,194 per passenger.Departing Thu, 17 Apr, returning Mon, 21 Apr.Return flight with Alaska Airlines and Contour Airlines.Outbound indirect flight with Alaska Airlines, departs from Seattle / Tacoma International on Thu, 17 Apr, arriving in Marion.Inbound indirect flight with Contour Airlines, departs from Marion on Mon, 21 Apr, arriving in Seattle / Tacoma International.Price includes taxes and charges.From HK$4,194, select.

Flying from Seattle to Illinois

Arm yourself with these facts on the fly.
Cheapest flight foundHK$1,245, Chicago
Cheapest month to flyMay
Average flight time4 hrs, 5 mins
Cheapest airport to fly fromSeattle / Tacoma International
Most popular airlineUnited

Frequently asked questions

We looked at all of the upcoming return flights from Seattle to Illinois we could find over the next 12 months. It looks like HK$1,245 is the best price. This is good, compared to the average Illinois ticket price of HK$2,790.
The cheapest month to fly from Seattle to Central Illinois Regional Airport is usually April. The cheapest month to fly from Seattle to Greater Peoria Airport is usually April. The cheapest month to fly from Seattle to Marion Airport is usually April. And the cheapest month to fly from Seattle to Moline Airport is usually April.
After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Seattle to Illinois on Saturday, 3 May 2025.
Seattle / Tacoma International Airport offers direct flights to Illinois.
If you're flying from Seattle, the cheapest city in Illinois to fly into is Chicago. The cheapest airport serving Chicago at the moment is Chicago O'Hare International.
The average flight time between Seattle and Illinois is 4 hours and 5 minutes.

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