SEA

$55 Find Cheap Flights from Illinois to Seattle

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to Seattle departing on 9/3. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

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Flights Deals

Cheap Flights from Illinois to Seattle

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Illinois to Seattle that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Illinois to Seattle

Tue, Aug 19 - Tue, Aug 26
Southwest Logo
9:05 pm - 11:35 pmMDW-SEA
4h 30mnonstop
Southwest Logo
5:35 am - 11:30 amSEA-MDW
3h 55mnonstop
$109Southwest
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Tue, Nov 11 - Tue, Nov 18
Alaska Airlines Logo
8:00 am - 10:40 amORD-SEA
4h 40mnonstop
Alaska Airlines Logo
5:52 pm - 11:59 pmSEA-ORD
4h 07mnonstop
$109Alaska Airlines
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Thu, Nov 6 - Tue, Nov 11
United Airlines Logo
4:15 pm - 6:57 pmORD-SEA
4h 42mnonstop
United Airlines Logo
1:20 pm - 11:10 pmSEA-ORD
7h 50m1 stop
$123United Airlines
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Wed, Oct 1 - Mon, Oct 6
Hawaiian Airlines Logo
6:20 am - 8:50 amORD-SEA
4h 30mnonstop
Hawaiian Airlines Logo
12:17 am - 6:21 amSEA-ORD
4h 04mnonstop
$125Hawaiian Airlines
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Fri, Sep 5 - Mon, Sep 22
Hawaiian Airlines Logo
7:00 am - 2:26 pmORD-SEA
9h 26m1 stop
Hawaiian Airlines Logo
12:59 am - 7:03 amSEA-ORD
4h 04mnonstop
$132Hawaiian Airlines
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Sat, Sep 13 - Fri, Sep 19
Logo
2:07 pm - 6:45 pmORD-SEA
6h 38m1 stop
Logo
12:59 am - 7:03 amSEA-ORD
4h 04mnonstop
$146
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Sun, Nov 9 - Sat, Nov 15
United Airlines Logo
7:10 am - 9:53 amORD-SEA
4h 43mnonstop
United Airlines Logo
1:20 pm - 11:10 pmSEA-ORD
7h 50m1 stop
$147United Airlines
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Sat, Jul 5 - Wed, Jul 16
Delta Logo
7:09 am - 9:45 amORD-SEA
4h 36mnonstop
Delta Logo
5:55 pm - 11:56 pmSEA-ORD
4h 01mnonstop
$184Delta
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Tue, Jul 15 - Wed, Jul 23
Delta Logo
7:11 am - 9:45 amORD-SEA
4h 34mnonstop
Delta Logo
6:10 am - 12:11 pmSEA-ORD
4h 01mnonstop
$199Delta
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Sat, Jul 5 - Wed, Jul 16
Logo
7:00 am - 2:20 pmORD-SEA
9h 20m1 stop
Logo
5:54 pm - 11:59 pmSEA-ORD
4h 05mnonstop
$225
Find Deal
Useful Info

Good to know

Low seasonFebruary
High seasonJuly
Cheapest flight$55
Best time to beat the crowds with an average 12% drop in price.
Most popular time to fly with an average 16% increase in price.
Flight from Chicago Midway Airport to Seattle

Flights from Illinois to Seattle: the best tips from KAYAK users

Insights shared by verified travelers who flew the route from Illinois to Seattle 
Learn how KAYAK collects reviews and tips from users.
PaulFlew with Alaska AirlinesORD-SEAApr 2024
The flight is long, at over four hours. I would try to get a window or aisle seat to be more comfortable. I would check with other airlines that allow you to choose your seat even if you are in the economy section. I would bring your own food on the plane as the service was sometimes sketchy.
Verified travelerFlew with Alaska AirlinesORD-SEAApr 2024
If you miss your flight ask any alaska agent to how and where to rebook the flight.

FAQs for booking flights from Illinois to Seattle

  • How does KAYAK find such low prices on flights from Illinois to Seattle?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Illinois to Seattle.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Illinois to Seattle?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Seattle from Illinois is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Illinois to Seattle?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Seattle with an airline and back to Illinois with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Illinois to Seattle?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Seattle from Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Everything you need to know for your flight to Seattle

Information on the airport you'll fly into in Seattle

Seattle (SEA)

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