Cheap flights from Seattle (SEA) to Illinois (IL)

Flight FAQs

From Seattle to Illinois

What days are nonstop flights available from Seattle to Illinois?

Nonstop flights can be found on the following days: Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, Saturday.

How popular is this flight route?

The Seattle to Illinois flight path was viewed by 129 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

What are the most popular airlines that fly from Seattle to Illinois?

When booking a flight from Seattle to Illinois, you may want to consider flying on Delta, Frontier or Spirit Airlines as they are the most popular for this route.

What are the most popular routes from Seattle to Illinois?

The most popular flight routes from Seattle to Illinois are Seattle/Tacoma Intl - Chicago O'Hare Intl, Seattle/Tacoma Intl - Chicago Midway and Seattle/Tacoma Intl - Moline Quad-City.

What are the cheapest Flights from Seattle to Illinois?

While on average a flight from Seattle to Illinois is generally $255, our data shows the cheapest flight currently is $55. When looking at the most popular route, (Seattle/Tacoma Intl - Chicago O'Hare Intl), you can expect to pay $152 for that flight.

What are the most reliable airlines from Seattle to Illinois?

Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Seattle to Illinois on time: United Airlines(89%), Brussels Airlines(87%), Royal Jordanian(85%.)