SEA

$50 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 8/25. 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

Thu, Aug 7 - Wed, Aug 13
Alaska Airlines Logo
8:42 pm - 11:24 pmORD-SEA
4h 42mnonstop
Alaska Airlines Logo
5:54 pm - 11:59 pmSEA-ORD
4h 05mnonstop
$94Alaska Airlines
Find Deal
Thu, Aug 14 - Mon, Aug 18
Hawaiian Airlines Logo
8:42 pm - 11:24 pmORD-SEA
4h 42mnonstop
Hawaiian Airlines Logo
6:00 am - 12:07 pmSEA-ORD
4h 07mnonstop
$96Hawaiian Airlines
Find Deal
Thu, Aug 7 - Wed, Aug 13
Logo
6:00 am - 8:37 amORD-SEA
4h 37mnonstop
Logo
5:54 pm - 11:59 pmSEA-ORD
4h 05mnonstop
$100
Find Deal
Wed, Sep 10 - Wed, Sep 17
Southwest Logo
9:05 pm - 11:35 pmMDW-SEA
4h 30mnonstop
Southwest Logo
5:35 am - 11:30 amSEA-MDW
3h 55mnonstop
$105Southwest
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Sat, Aug 23 - Sat, Aug 30
Delta Logo
6:13 pm - 8:50 pmORD-SEA
4h 37mnonstop
Delta Logo
5:50 pm - 11:51 pmSEA-ORD
4h 01mnonstop
$105Delta
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Wed, Aug 20 - Tue, Aug 26
American Airlines Logo
6:50 am - 9:19 amORD-SEA
4h 29mnonstop
American Airlines Logo
12:46 am - 6:52 amSEA-ORD
4h 06mnonstop
$106American Airlines
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Thu, Sep 4 - Thu, Sep 11
Delta Logo
7:15 am - 9:45 amORD-SEA
4h 30mnonstop
Delta Logo
5:55 pm - 11:55 pmSEA-ORD
4h 00mnonstop
$107Delta
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Mon, Oct 20 - Sun, Oct 26
American Airlines Logo
7:15 am - 9:49 amORD-SEA
4h 34mnonstop
American Airlines Logo
12:34 am - 6:42 amSEA-ORD
4h 08mnonstop
$108American Airlines
Find Deal
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
$110Southwest
Find Deal
Fri, Sep 12 - Sun, Sep 14
Logo
3:18 pm - 10:46 amPIA-SEA
21h 28m2 stops
Logo
6:25 pm - 2:28 pmSEA-PIA
18h 03m2 stops
$451
Find Deal
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Good to know

Low seasonFebruary
High seasonJuly
Cheapest flight$50
Best time to beat the crowds with an average 12% drop in price.
Most popular time to fly with an average 17% increase in price.
Flight from Chicago O'Hare 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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