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Cheap flights from Illinois to Seattle from $85

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Illinois to Seattle departing on 6/15. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags
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Sat 5/4
Sat 5/11

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Easily compare round-trip flights from Illinois to Seattle

Below you can see the best fares for your round-trip flight route over the next six months. All fares were found on momondo this week. Browse the quickest and cheapest flights from Illinois to Seattle by changing tabs
Alaska Airlines
Jun 4
ORD6:00 amChicago O'Hare Intl
4h 27m
SEA8:27 amSeattle/Tacoma Intl
Jun 4
SEA10:39 amSeattle/Tacoma Intl
4h 15m
ORD4:54 pmChicago O'Hare Intl
Multiple Airlines
May 17
ORD7:52 pmChicago O'Hare Intl
14h 53m
1 stop
SEA8:45 amSeattle/Tacoma Intl
May 25
SEA10:49 pmSeattle/Tacoma Intl
4h 06m
ORD4:55 amChicago O'Hare Intl
Spirit Airlines
May 28
ORD10:52 pmChicago O'Hare Intl
11h 53m
1 stop
SEA8:45 amSeattle/Tacoma Intl
Jun 4
SEA9:40 pmSeattle/Tacoma Intl
6h 56m
1 stop
ORD6:36 amChicago O'Hare Intl
American Airlines
Sep 25
STL2:38 pmLambert-St Louis
8h 05m
1 stop
SEA8:43 pmSeattle/Tacoma Intl
Oct 2
SEA10:32 pmSeattle/Tacoma Intl
9h 32m
1 stop
STL10:04 amLambert-St Louis
Frontier
Jun 2
MDW10:49 pmChicago Midway
11h 51m
1 stop
SEA8:40 amSeattle/Tacoma Intl
Aug 17
SEA7:51 pmSeattle/Tacoma Intl
8h 42m
1 stop
MDW6:33 amChicago Midway
United Airlines
May 16
ORD7:10 amChicago O'Hare Intl
8h 33m
1 stop
SEA1:43 pmSeattle/Tacoma Intl
May 22
SEA2:21 pmSeattle/Tacoma Intl
3h 58m
ORD8:19 pmChicago O'Hare Intl

Find the cheapest one-way flights from Illinois to Seattle

If you're looking for one-way flights from Illinois to Seattle, view some of our deals below provided by Alaska Airlines, American Airlines and Frontier
Frontier
Jun 15
STL8:02 pmLambert-St Louis
15h 10m
1 stop
SEA9:12 amSeattle/Tacoma Intl
Spirit Airlines
May 8
STL11:36 amLambert-St Louis
23h 09m
1 stop
SEA8:45 amSeattle/Tacoma Intl
American Airlines
Sep 24
STL5:37 amLambert-St Louis
8h 08m
1 stop
SEA11:45 amSeattle/Tacoma Intl

Search last-minute flights to Seattle from Illinois

Find and compare round-trip flight prices for your last-minute flight from Illinois to Seattle
Multiple Airlines
May 7
ORD9:34 pmChicago O'Hare Intl
13h 11m
1 stop
SEA8:45 amSeattle/Tacoma Intl
May 21
SEA11:34 pmSeattle/Tacoma Intl
4h 06m
ORD5:40 amChicago O'Hare Intl
Spirit Airlines
May 7
ORD9:34 pmChicago O'Hare Intl
13h 11m
1 stop
SEA8:45 amSeattle/Tacoma Intl
May 14
SEA9:40 pmSeattle/Tacoma Intl
6h 50m
1 stop
ORD6:30 amChicago O'Hare Intl
Frontier
May 8
MDW10:59 pmChicago Midway
19h 32m
1 stop
SEA4:31 pmSeattle/Tacoma Intl
May 13
SEA5:02 pmSeattle/Tacoma Intl
27h 03m
1 stop
MDW10:05 pmChicago Midway
American Airlines
May 8
STL5:04 amLambert-St Louis
8h 04m
1 stop
SEA11:08 amSeattle/Tacoma Intl
May 17
SEA1:15 amSeattle/Tacoma Intl
9h 16m
1 stop
STL12:31 pmLambert-St Louis
Delta
May 8
STL5:30 pmLambert-St Louis
6h 51m
1 stop
SEA10:21 pmSeattle/Tacoma Intl
May 10
SEA12:40 amSeattle/Tacoma Intl
8h 30m
1 stop
STL11:10 amLambert-St Louis
Alaska Airlines
May 9
ORD2:53 pmChicago O'Hare Intl
7h 31m
1 stop
SEA8:24 pmSeattle/Tacoma Intl
May 21
SEA11:34 pmSeattle/Tacoma Intl
4h 06m
ORD5:40 amChicago O'Hare Intl

Best airlines flying from Illinois to Seattle

Compare and see reviews for airlines that fly from Illinois to Seattle with momondo
Airline
Rating
Free Cancellation
Price
Alaska AirlinesPriceFrom $84Free CancellationRating
8.0
9,116 reviews
Search Alaska Airlines flights
DeltaPriceFrom $99Free CancellationRating
8.0
10,913 reviews
Search Delta flights
American AirlinesPriceFrom $109Free CancellationRating
7.3
14,834 reviews
Search American Airlines flights
United AirlinesPriceFrom $114Free CancellationRating
7.4
11,202 reviews
Search United Airlines flights
FrontierPriceFrom $123Free CancellationRating
6.2
4,123 reviews
Search Frontier flights
Spirit AirlinesPriceFrom $142Free CancellationRating
6.4
8,745 reviews
Search Spirit Airlines flights

Spirit Airlines flights from Illinois to Seattle

Our best Spirit Airlines deals on Illinois to Seattle flight tickets
Spirit Airlines
May 28
ORD10:52 pmChicago O'Hare Intl
11h 53m
1 stop
SEA8:45 amSeattle/Tacoma Intl
Jun 4
SEA9:40 pmSeattle/Tacoma Intl
6h 56m
1 stop
ORD6:36 amChicago O'Hare Intl
Spirit Airlines
May 7
ORD9:34 pmChicago O'Hare Intl
13h 11m
1 stop
SEA8:45 amSeattle/Tacoma Intl
May 14
SEA9:40 pmSeattle/Tacoma Intl
6h 50m
1 stop
ORD6:30 amChicago O'Hare Intl
Spirit Airlines
May 7
ORD9:34 pmChicago O'Hare Intl
13h 11m
1 stop
SEA8:45 amSeattle/Tacoma Intl
May 14
SEA9:40 pmSeattle/Tacoma Intl
6h 50m
1 stop
ORD6:30 amChicago O'Hare Intl

Alaska Airlines flights from Illinois to Seattle

Our best Alaska Airlines deals on Illinois to Seattle flight tickets
Alaska Airlines
Jun 4
ORD6:00 amChicago O'Hare Intl
4h 27m
SEA8:27 amSeattle/Tacoma Intl
Jun 4
SEA10:39 amSeattle/Tacoma Intl
4h 15m
ORD4:54 pmChicago O'Hare Intl
Alaska Airlines
May 12
ORD6:00 amChicago O'Hare Intl
4h 34m
SEA8:34 amSeattle/Tacoma Intl
May 21
SEA11:34 pmSeattle/Tacoma Intl
4h 06m
ORD5:40 amChicago O'Hare Intl
Alaska Airlines
May 12
ORD8:35 amChicago O'Hare Intl
7h 51m
1 stop
SEA2:26 pmSeattle/Tacoma Intl
May 21
SEA11:34 pmSeattle/Tacoma Intl
4h 06m
ORD5:40 amChicago O'Hare Intl

How to get the cheapest flight ticket from Illinois to Seattle

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 Seattle from Illinois?

Frontier. Alaska Airlines, American Airlines, and Delta are the most popular carriers operating from Illinois to Seattle

What is the cheapest Illinois to Seattle flight route?

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

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

There are 4 cabin classes available to choose from on Illinois to Seattle 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 Illinois to Seattle flights?

No. A direct flight is the cheapest option for a flight between Illinois to Seattle.

Cheap Illinois to Seattle flight deals and tips

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

Best Price Found

$85

Fastest flight time

4h 14m

Direct flights

Every day

Airports in Seattle

1 airport
The best one-way flight to Seattle from Illinois in the past 72 hours is $85. The best round-trip flight deal from Illinois to Seattle found on momondo in the last 72 hours is $133.
The fastest flight from Illinois to Seattle takes 4h 14m
Direct flights go from Illinois to Seattle every day.
There is 1 airport near Seattle: Seattle/Tacoma Intl (SEA)

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

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

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

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Illinois to Seattle/Tacoma Intl Airport.

  • What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

    The required travel and health documents for your Seattle/Tacoma Intl Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Seattle/Tacoma Intl Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.


Why use momondo?

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

Finding the right flight to Seattle from Illinois is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Seattle quick and easy, saving you time and money.

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

Yes. momondo enables you to select and highlight flights to Seattle from Illinois with this policy.

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

Once you have performed a search for Illinois to Seattle flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

If you are not ready to book a flight from Illinois to Seattle now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Seattle and let you know when they change.


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Sat 5/4
Sat 5/11
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