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Cheap flights from Seattle to Illinois from $62

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Illinois departing on 1/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Seattle to Illinois

Cheap round-trip flights

These are some of the best round-trip flight deals from Seattle to Illinois that have been recently found on momondo from popular airlines, departing in the coming months.

Cheap one-way flights

Flying one-way? These are some of the best deals recently discovered on momondo for flights from Seattle to Illinois.

Cheap last minute flights

Planning a quick getaway from Seattle to Illinois? These are the last-minute flight deals available now.

Cheap direct flights

If you prefer a non-stop journey, check out our latest direct flight deals to Illinois, so you can enjoy a seamless trip without layovers.

Cheap bus & train deals from Seattle to Illinois

Find recent round-trip train or bus tickets from Seattle to Illinois.

All round-trip flight deals to Illinois

The cheapest plane tickets to Illinois found on KAYAK recently.
11:50 pm - 5:47 amSEA-ORD
3h 57mnonstop
7:15 am - 1:15 pmORD-SEA
8h 00m1 stop
$174United Airlines
Find Deal
Wed, May 7 - Tue, May 13
1:40 pm - 11:48 amSEA-MDW
20h 08m1 stop
12:43 pm - 8:57 amMDW-SEA
22h 14m1 stop
$174Frontier
Find Deal
Sun, Dec 8 - Thu, Dec 12
4:00 pm - 2:26 pmSEA-ORD
20h 26m1 stop
6:33 pm - 2:53 pmORD-SEA
22h 20m2 stops
$175Spirit Airlines
Find Deal
Wed, Dec 4 - Tue, Dec 10
4:00 pm - 5:30 amSEA-ORD
11h 30m1 stop
9:53 pm - 2:53 pmORD-SEA
19h 00m1 stop
$176Spirit Airlines
Find Deal
Sat, Dec 7 - Mon, Dec 9
7:10 am - 1:15 pmSEA-ORD
4h 05mnonstop
6:05 am - 8:55 amORD-SEA
4h 50mnonstop
$187Delta
Find Deal
Thu, Dec 12 - Mon, Dec 16
10:47 am - 4:54 pmSEA-ORD
4h 07mnonstop
7:14 pm - 10:00 pmORD-SEA
4h 46mnonstop
$191Alaska Airlines
Find Deal
Fri, Dec 6 - Fri, Dec 6
7:10 am - 1:15 pmSEA-ORD
4h 05mnonstop
7:00 am - 9:58 amORD-SEA
4h 58mnonstop
$193Delta
Find Deal
Wed, Jan 1 - Tue, Jan 7
11:22 pm - 5:19 amSEA-ORD
3h 57mnonstop
5:59 pm - 9:18 amORD-SEA
17h 19m1 stop
$196Alaska Airlines
Find Deal
Fri, Dec 6 - Mon, Dec 9
10:54 pm - 5:00 amSEA-ORD
4h 06mnonstop
8:20 pm - 10:58 pmORD-SEA
4h 38mnonstop
$199American Airlines
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Thu, May 1 - Tue, May 6
12:45 am - 10:48 amSEA-STL
8h 03m1 stop
5:23 am - 12:41 pmSTL-SEA
9h 18m1 stop
$236American Airlines
Find Deal
Thu, Jan 9 - Sun, Jan 12
12:13 pm - 7:25 pmSEA-ORD
29h 12m1 stop
$62Frontier
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Thu, Jan 9
12:10 pm - 7:28 pmSEA-ORD
29h 18m1 stop
$63Frontier
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Thu, Jan 30
12:10 pm - 7:28 pmSEA-ORD
29h 18m1 stop
$64Frontier
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Thu, Jan 23
6:15 am - 12:17 pmSEA-ORD
4h 02mnonstop
$85Delta
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Sat, Dec 14
11:55 pm - 5:52 amSEA-ORD
3h 57mnonstop
$94United Airlines
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Fri, Dec 6
11:55 pm - 5:52 amSEA-ORD
3h 57mnonstop
$95United Airlines
Find Deal
Mon, Nov 25
12:31 am - 6:34 amSEA-ORD
4h 03mnonstop
$105American Airlines
Find Deal
Fri, Jan 3
7:10 am - 1:15 pmSEA-ORD
4h 05mnonstop
$109Delta
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Thu, Dec 12
12:31 am - 9:36 amSEA-STL
7h 05m1 stop
$123American Airlines
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Sat, Dec 28
11:48 pm - 12:15 pmSEA-ORD
10h 27m1 stop
$171JetBlue
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Sun, Mar 2
9:09 pm - 11:25 pmSEA-STL
24h 16m1 stop
4:09 pm - 8:15 amSTL-SEA
18h 06m1 stop
$162Frontier
Find Deal
Fri, Nov 15 - Mon, Nov 18
5:28 pm - 12:04 pmSEA-ORD
16h 36m1 stop
11:51 am - 4:23 pmORD-SEA
30h 32m2 stops
$238Spirit Airlines
Find Deal
Tue, Nov 19 - Mon, Nov 25
5:10 pm - 12:42 amSEA-STL
5h 32m1 stop
6:30 pm - 12:23 amSTL-SEA
7h 53m1 stop
$301Delta
Find Deal
Mon, Nov 18 - Tue, Dec 17
6:00 am - 12:09 pmSEA-ORD
4h 09mnonstop
8:00 am - 10:40 amORD-SEA
4h 40mnonstop
$308Alaska Airlines
Find Deal
Tue, Nov 19 - Mon, Nov 25
9:59 pm - 5:28 amSEA-ORD
5h 29m1 stop
8:00 am - 10:40 amORD-SEA
4h 40mnonstop
$317Alaska Airlines
Find Deal
Tue, Nov 19 - Mon, Nov 25
12:59 am - 11:59 amSEA-STL
9h 00m1 stop
2:29 pm - 8:14 pmSTL-SEA
7h 45m1 stop
$321American Airlines
Find Deal
Tue, Nov 19 - Tue, Dec 17
12:35 am - 6:36 amSEA-ORD
4h 01mnonstop
9:55 am - 12:40 pmORD-SEA
4h 45mnonstop
$328American Airlines
Find Deal
Tue, Nov 19 - Sun, Nov 24
7:15 am - 1:20 pmSEA-ORD
4h 05mnonstop
6:05 am - 8:55 amORD-SEA
4h 50mnonstop
$337Delta
Find Deal
Tue, Nov 19 - Sun, Nov 24
7:11 pm - 11:10 amSEA-STL
13h 59m2 stops
7:00 am - 12:58 pmSTL-SEA
7h 58m1 stop
$416United Airlines
Find Deal
Mon, Nov 18 - Tue, Dec 17
7:11 pm - 11:14 amSEA-STL
14h 03m2 stops
7:09 am - 12:53 pmSTL-SEA
7h 44m1 stop
$431United Airlines
Find Deal
Fri, Nov 15 - Mon, Nov 18
7:10 am - 1:15 pmSEA-ORD
4h 05mnonstop
6:45 pm - 9:47 pmORD-SEA
5h 02mnonstop
$169Delta
Find Deal
Sat, Dec 7 - Wed, Dec 11
10:50 am - 4:50 pmSEA-MDW
4h 00mnonstop
9:15 am - 11:50 amMDW-SEA
4h 35mnonstop
$170Southwest
Find Deal
Wed, Jan 8 - Tue, Jan 14
11:55 pm - 5:52 amSEA-ORD
3h 57mnonstop
1:10 pm - 3:57 pmORD-SEA
4h 47mnonstop
$178United Airlines
Find Deal
Fri, Dec 6 - Tue, Dec 10
11:55 pm - 5:52 amSEA-ORD
3h 57mnonstop
7:55 pm - 10:46 pmORD-SEA
4h 51mnonstop
$179United Airlines
Find Deal
Wed, Dec 4 - Sat, Dec 7
10:50 am - 4:50 pmSEA-MDW
4h 00mnonstop
9:15 am - 11:50 amMDW-SEA
4h 35mnonstop
$179Southwest
Find Deal
Fri, Jan 10 - Tue, Jan 14
6:00 pm - 11:59 pmSEA-ORD
3h 59mnonstop
7:45 am - 10:36 amORD-SEA
4h 51mnonstop
$180Alaska Airlines
Find Deal
Thu, Jan 9 - Mon, Jan 13
5:51 pm - 11:47 pmSEA-ORD
3h 56mnonstop
6:32 am - 9:20 amORD-SEA
4h 48mnonstop
$183Alaska Airlines
Find Deal
Sat, Dec 7 - Mon, Dec 9
6:00 am - 12:07 pmSEA-ORD
4h 07mnonstop
6:32 am - 9:20 amORD-SEA
4h 48mnonstop
$186Alaska Airlines
Find Deal
Thu, Dec 12 - Mon, Dec 16
12:15 am - 6:17 amSEA-ORD
4h 02mnonstop
9:55 am - 12:43 pmORD-SEA
4h 48mnonstop
$189American Airlines
Find Deal
Mon, Dec 9 - Wed, Dec 11
12:15 am - 6:17 amSEA-ORD
4h 02mnonstop
9:55 am - 12:43 pmORD-SEA
4h 48mnonstop
$198American Airlines
Find Deal
Thu, Dec 12 - Sat, Dec 14

Frontier flights from Seattle to Illinois

Our best Frontier deals on Seattle to Illinois flight tickets
Frontier
Dec 8
SEA1:40 pmSeattle/Tacoma Intl
20h 08m
1 stop
MDW11:48 amChicago Midway
Dec 12
MDW12:43 pmChicago Midway
22h 14m
1 stop
SEA8:57 amSeattle/Tacoma Intl
Frontier
Dec 6
SEA2:34 pmSeattle/Tacoma Intl
8h 01m
1 stop
ORD12:35 amChicago O'Hare Intl
Dec 8
ORD6:36 pmChicago O'Hare Intl
16h 21m
1 stop
SEA8:57 amSeattle/Tacoma Intl
Frontier
Dec 9
SEA2:34 pmSeattle/Tacoma Intl
7h 39m
1 stop
MDW12:13 amChicago Midway
Dec 16
MDW7:15 amChicago Midway
8h 19m
1 stop
SEA1:34 pmSeattle/Tacoma Intl

Spirit Airlines flights from Seattle to Illinois

Our best Spirit Airlines deals on Seattle to Illinois flight tickets
Spirit Airlines
Dec 4
SEA4:00 pmSeattle/Tacoma Intl
20h 26m
1 stop
ORD2:26 pmChicago O'Hare Intl
Dec 10
ORD6:33 pmChicago O'Hare Intl
22h 20m
2 stops
SEA2:53 pmSeattle/Tacoma Intl
Spirit Airlines
Dec 7
SEA4:00 pmSeattle/Tacoma Intl
11h 30m
1 stop
ORD5:30 amChicago O'Hare Intl
Dec 9
ORD9:53 pmChicago O'Hare Intl
19h 00m
1 stop
SEA2:53 pmSeattle/Tacoma Intl
Spirit Airlines
Dec 5
SEA9:21 pmSeattle/Tacoma Intl
15h 05m
1 stop
ORD2:26 pmChicago O'Hare Intl
Dec 9
ORD3:21 pmChicago O'Hare Intl
25h 32m
1 stop
SEA2:53 pmSeattle/Tacoma Intl

How to get the cheapest flight ticket from Seattle to Illinois

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest airline that flies to Illinois from Seattle?

Spirit Airlines. Spirit Airlines, Frontier, and Southwest are the most popular carriers operating from Seattle to Illinois

What is the cheapest Seattle to Illinois flight route?

Seattle/Tacoma Intl - Chicago O'Hare Intl. Fly from Seattle/Tacoma Intl to Chicago O'Hare Intl for the best Seattle - Illinois flight prices

What cabin class options are available on Seattle to Illinois flights?

There are 4 cabin classes available to choose from on Seattle to Illinois flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Seattle to Illinois flights?

You could potentially save up to 37% on your flight if you consider stops on a Seattle to Illinois flight.

Cheap Seattle to Illinois flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to Illinois

Best Price Found

$62

Fastest flight time

3h 48m

Direct flights

Every day

Airports in Illinois

3 airports
The best one-way flight to Illinois from Seattle in the past 72 hours is $62. The best round-trip flight deal from Seattle to Illinois found on momondo in the last 72 hours is $174.
The fastest flight from Seattle to Illinois takes 3h 48m
Direct flights go from Seattle to Illinois every day.
There are 3 airports near Illinois: Chicago O'Hare Intl (ORD), Chicago Midway (MDW), Lambert-St Louis (STL)

  • When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Illinois?

    Prices for flights from Seattle/Tacoma Intl Airport to Illinois are updated daily.

  • How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Illinois?

  • How old do you have to be to fly from Seattle/Tacoma Intl Airport to Illinois?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Illinois.

  • What documentation or ID do you need to fly to Illinois?

    The necessary travel and health documents for your Illinois trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from Seattle to Illinois?


Best airlines flying from Seattle to Illinois

Compare and see reviews for airlines that fly from Seattle to Illinois with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $100Free CancellationRating
8.0
8,788 reviews
Search Delta flights
Spirit AirlinesPriceFrom $116Free CancellationRating
6.3
8,167 reviews
Search Spirit Airlines flights
Alaska AirlinesPriceFrom $126Free CancellationRating
8.0
9,439 reviews
Search Alaska Airlines flights
FrontierPriceFrom $131Free CancellationRating
6.1
3,551 reviews
Search Frontier flights
American AirlinesPriceFrom $136Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
United AirlinesPriceFrom $153Free CancellationRating
7.4
9,194 reviews
Search United Airlines flights
SouthwestPriceFrom $200Free CancellationRating
8.1
5,045 reviews
Search Southwest flights

Why use momondo?

Why should I use momondo to find a flight deal from Seattle to Illinois?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Seattle to Illinois. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Seattle to Illinois with flexible booking policies on momondo?

All flight searches from Seattle to Illinois on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Seattle to Illinois?

Once all potential Seattle to Illinois flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Seattle to Illinois right now. Can momondo alert me if prices change?

Price alerts on flights to Illinois from Seattle are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.


An easier way to manage your Illinois trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

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