SEA

$61 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 6/3. 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.
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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.

Recent round-trip flight deals from Illinois to Seattle

KAYAK's recommended round-trip deals from the most popular airlines that fly from Illinois to Seattle.
Discover the best prices for you by selecting your travel dates on KAYAK.
Spirit Airlines Logo
11:50 am - 12:10 amORD-SEA
14h 20m1 stop
Spirit Airlines Logo
3:20 pm - 5:25 amSEA-ORD
12h 05m1 stop
$158Spirit Airlines
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Wed, May 28 - Tue, Jun 3
Logo
6:00 am - 8:30 amORD-SEA
4h 30mnonstop
Logo
3:20 pm - 5:25 amSEA-ORD
12h 05m1 stop
$161
Find Deal
Mon, May 12 - Mon, May 19
Hawaiian Airlines Logo
6:00 am - 8:27 amORD-SEA
4h 27mnonstop
Hawaiian Airlines Logo
4:19 pm - 10:23 pmSEA-ORD
4h 04mnonstop
$163Hawaiian Airlines
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Wed, May 28 - Wed, May 28
Alaska Airlines Logo
1:03 pm - 3:42 pmORD-SEA
4h 39mnonstop
Alaska Airlines Logo
5:54 pm - 11:59 pmSEA-ORD
4h 05mnonstop
$164Alaska Airlines
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Wed, Jun 25 - Wed, Jun 25
Hawaiian Airlines Logo
7:51 pm - 10:30 pmORD-SEA
4h 39mnonstop
Hawaiian Airlines Logo
5:55 pm - 11:59 pmSEA-ORD
4h 04mnonstop
$165Hawaiian Airlines
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Sat, May 31 - Sat, Jun 7
Delta Logo
2:25 pm - 4:57 pmORD-SEA
4h 32mnonstop
Delta Logo
11:15 am - 5:25 pmSEA-ORD
4h 10mnonstop
$169Delta
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Wed, May 28 - Tue, Jun 3
Alaska Airlines Logo
5:56 pm - 8:32 pmORD-SEA
4h 36mnonstop
Alaska Airlines Logo
4:19 pm - 10:23 pmSEA-ORD
4h 04mnonstop
$174Alaska Airlines
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Wed, May 14 - Tue, May 20
United Airlines Logo
7:10 am - 9:43 amORD-SEA
4h 33mnonstop
United Airlines Logo
7:05 am - 5:10 pmSEA-ORD
8h 05m1 stop
$175United Airlines
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Tue, Aug 19 - Tue, Aug 26
United Airlines Logo
7:59 pm - 10:42 pmORD-SEA
4h 43mnonstop
United Airlines Logo
2:15 pm - 8:25 pmSEA-ORD
4h 10mnonstop
$180United Airlines
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Tue, May 20 - Wed, May 21
Delta Logo
6:05 pm - 11:47 pmSTL-SEA
7h 42m1 stop
Delta Logo
10:55 pm - 9:37 amSEA-STL
8h 42m1 stop
$189Delta
Find Deal
Thu, May 29 - Sat, Jun 7
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Good to know

Low seasonFebruary
High seasonJuly
Cheapest flight$61
Best time to beat the crowds with an average 12% drop in price.
Most popular time to fly with an average 15% 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.
Verified travelerFlew with Alaska AirlinesORD-SEAJun 2024
It was my first time flying with Alaska and I was delayed 3.5 hours. Might reconsider using Alaska in the future.
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.
SeanFlew with Alaska AirlinesORD-SEAJan 2024
Signage for hotel shuttles at O’Hare is poor. Restrooms were surprisingly clean. In winter especially, there are going to be delays.

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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