What's the average Seattle to Illinois flight price?

We looked at all of the upcoming round-trip flights from Seattle to Illinois we could find over the next 12 months. It looks like 88 € is the best price. This is good, compared to the average Illinois ticket price of 303 €.

What is the cheapest month to fly from Seattle to Illinois?

The cheapest month to fly from Seattle to Central Illinois Regional Airport is usually October . The cheapest month to fly from Seattle to Moline Airport is usually July . The cheapest month to fly from Seattle to Greater Peoria Airport is usually July . And the cheapest month to fly from Seattle to Chicago O'Hare International Airport is usually October .

On which upcoming date is it cheapest to fly from Seattle to Illinois?

After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Seattle to Illinois on Tuesday, October 1, 2024 .

Are there any direct flights from Seattle to Illinois?

Seattle / Tacoma International Airport offers direct flights to Illinois.

If I'm flying from Seattle, where in Illinois is cheapest to fly to?

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.

How long is the flight from Seattle to Illinois?

The average flight time between Seattle and Illinois is 3 hours and 59 minutes.

Flights from Seattle to Illinois

Flight deals from Seattle to Illinois

Looking for cheap flights from Seattle to Illinois, or a last-minute trip? Find the lowest prices on one-way and round-trip flights right here.

Chicago.88 € per passenger.Departing Tue, Oct 1, returning Tue, Oct 8.Round-trip flight with Alaska Airlines.Outbound direct flight with Alaska Airlines departing from Seattle / Tacoma International on Tue, Oct 1, arriving in Chicago O'Hare International.Inbound direct flight with Alaska Airlines departing from Chicago O'Hare International on Tue, Oct 8, arriving in Seattle / Tacoma International.Price includes taxes and charges.From 88 €, select.

Moline.253 € per passenger.Departing Thu, Jul 25, returning Sun, Jul 28.Round-trip flight with Spirit Airlines and Allegiant Air.Outbound indirect flight with Spirit Airlines, departing from Seattle / Tacoma International on Thu, Jul 25, arriving in Moline.Inbound indirect flight with Allegiant Air, departing from Moline on Sun, Jul 28, arriving in Seattle / Tacoma International.Price includes taxes and charges.From 253 €, select.

Peoria.326 € per passenger.Departing Mon, Jul 8, returning Fri, Jul 12.Round-trip flight with Frontier Airlines and Allegiant Air.Outbound indirect flight with Frontier Airlines, departing from Seattle / Tacoma International on Mon, Jul 8, arriving in Greater Peoria.Inbound indirect flight with Allegiant Air, departing from Greater Peoria on Fri, Jul 12, arriving in Seattle / Tacoma International.Price includes taxes and charges.From 326 €, select.

Decatur.333 € per passenger.Departing Thu, Jul 18, returning Wed, Jul 24.Round-trip flight with United.Outbound indirect flight with United, departing from Seattle / Tacoma International on Thu, Jul 18, arriving in Decatur.Inbound indirect flight with United, departing from Decatur on Wed, Jul 24, arriving in Seattle / Tacoma International.Price includes taxes and charges.From 333 €, select.

Quincy.454 € per passenger.Departing Wed, Jul 17, returning Tue, Jul 23.Round-trip flight with Alaska Airlines and Southern Airways Express.Outbound indirect flight with Alaska Airlines, departing from Seattle / Tacoma International on Wed, Jul 17, arriving in Quincy.Inbound indirect flight with Southern Airways Express, departing from Quincy on Tue, Jul 23, arriving in Seattle / Tacoma International.Price includes taxes and charges.From 454 €, select.

Bloomington.559 € per passenger.Departing Wed, Oct 23, returning Thu, Oct 31.Round-trip flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departing from Seattle / Tacoma International on Wed, Oct 23, arriving in Central Illinois Regional.Inbound indirect flight with Frontier Airlines, departing from Central Illinois Regional on Thu, Oct 31, arriving in Seattle / Tacoma International.Price includes taxes and charges.From 559 €, select.

Flying from Seattle to Illinois

Arm yourself with these facts on the fly.

Cheapest flight found	45 €, Chicago
Cheapest month to fly	October
Average flight time	3 hrs, 59 mins
Cheapest airport to fly from	Seattle / Tacoma International
Most popular airline	United

How to find cheap flights from Seattle to Illinois

We've compared the best online travel agents and flight providers on the Internet to find the cheapest plane tickets from Seattle to Illinois. Other savvy travelers recently found round-trip flights from 88 € and one-way tickets from 45 €. Ready to join them? Here are a few tips to help you do it the smart way.

Fly from Seattle / Tacoma International into Chicago

At the moment, the lowest-priced flight tickets to Illinois are from Seattle / Tacoma International Airport to Chicago O'Hare International Airport.

Fly in October

We crunched the flight calendar and found the cheapest time to fly from Seattle to Illinois is currently October.

Fly on a Thursday

From our data, we can see that Thursday seems to be the cheapest time to fly from Seattle to Illinois.

Flex your dates for the best rates

If you’re flexible on your departure dates, you can use Skyscanner's whole month tool to find the cheapest day of the year to fly from Seattle to anywhere you choose in Illinois.

Watch as flight prices go up and down

With Price Alerts, we'll let you know when flight prices from Seattle to Illinois go up or down so you can book when the time is just right.

Relax – these are fee-free plane tickets

With us, there are no added fees – the Seattle to Illinois flight price you see when you search with us is what you pay to the provider.

Frequently asked questions

: We looked at all of the upcoming round-trip flights from Seattle to Illinois we could find over the next 12 months. It looks like 88 € is the best price. This is good, compared to the average Illinois ticket price of 303 €.
: The cheapest month to fly from Seattle to Central Illinois Regional Airport is usually October. The cheapest month to fly from Seattle to Moline Airport is usually July. The cheapest month to fly from Seattle to Greater Peoria Airport is usually July. And the cheapest month to fly from Seattle to Chicago O'Hare International Airport is usually October.
: After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Seattle to Illinois on Tuesday, October 1, 2024.
: 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 3 hours and 59 minutes.