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Cheap flights from Chicago to Seattle from $55

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Chicago to Seattle departing on 9/3. 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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0 bags

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Cheap round-trip flights

Southwest Logo
9:05 pm - 11:35 pmMDW-SEA
4h 30mnonstop
Southwest Logo
5:35 am - 11:30 amSEA-MDW
3h 55mnonstop
$109Southwest
Find Deal
Tue, Aug 19 - Tue, Aug 26
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
Find Deal
Tue, Nov 11 - Tue, Nov 18
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
Find Deal
Thu, Nov 6 - Tue, Nov 11
United Airlines Logo
7:10 am - 9:50 amORD-SEA
4h 40mnonstop
United Airlines Logo
11:54 pm - 5:55 amSEA-ORD
4h 01mnonstop
$125United Airlines
Find Deal
Mon, Aug 18 - Thu, Aug 28
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
Find Deal
Fri, Sep 5 - Mon, Sep 22
Hawaiian Airlines Logo
6:00 am - 8:37 amORD-SEA
4h 37mnonstop
Hawaiian Airlines Logo
5:55 pm - 11:59 pmSEA-ORD
4h 04mnonstop
$137Hawaiian Airlines
Find Deal
Fri, Aug 15 - Thu, Sep 18
Delta Logo
7:11 am - 9:45 amORD-SEA
4h 34mnonstop
Delta Logo
5:50 pm - 11:51 pmSEA-ORD
4h 01mnonstop
$240Delta
Find Deal
Sat, Aug 9 - Sat, Aug 16
Delta Logo
6:15 pm - 8:55 pmORD-SEA
4h 40mnonstop
Delta Logo
5:55 pm - 11:56 pmSEA-ORD
4h 01mnonstop
$243Delta
Find Deal
Tue, Jul 22 - Mon, Jul 28
American Airlines Logo
9:05 pm - 11:50 pmORD-SEA
4h 45mnonstop
American Airlines Logo
12:45 am - 6:51 amSEA-ORD
4h 06mnonstop
$251American Airlines
Find Deal
Fri, Aug 1 - Thu, Aug 7
American Airlines Logo
6:50 am - 9:19 amORD-SEA
4h 29mnonstop
American Airlines Logo
3:15 pm - 12:35 amSEA-ORD
7h 20m1 stop
$273American Airlines
Find Deal
Wed, Aug 20 - Thu, Aug 28

Hawaiian Airlines flights from Chicago to Seattle

Our best Hawaiian Airlines deals on Chicago to Seattle flight tickets
Hawaiian Airlines
Sep 5
ORD7:00 amChicago O'Hare Intl
9h 26m
1 stop
SEA2:26 pmSeattle/Tacoma Intl
Sep 22
SEA12:59 amSeattle/Tacoma Intl
4h 04m
ORD7:03 amChicago O'Hare Intl
Hawaiian Airlines
Aug 15
ORD6:00 amChicago O'Hare Intl
4h 37m
SEA8:37 amSeattle/Tacoma Intl
Sep 18
SEA5:55 pmSeattle/Tacoma Intl
4h 04m
ORD11:59 pmChicago O'Hare Intl
Hawaiian Airlines
Sep 13
ORD2:07 pmChicago O'Hare Intl
6h 38m
1 stop
SEA6:45 pmSeattle/Tacoma Intl
Sep 20
SEA3:59 pmSeattle/Tacoma Intl
4h 05m
ORD10:04 pmChicago O'Hare Intl

Alaska Airlines flights from Chicago to Seattle

Our best Alaska Airlines deals on Chicago to Seattle flight tickets
Alaska Airlines
Nov 11
ORD8:00 amChicago O'Hare Intl
4h 40m
SEA10:40 amSeattle/Tacoma Intl
Nov 18
SEA5:52 pmSeattle/Tacoma Intl
4h 07m
ORD11:59 pmChicago O'Hare Intl
Alaska Airlines
Oct 4
ORD6:00 amChicago O'Hare Intl
4h 27m
SEA8:27 amSeattle/Tacoma Intl
Oct 6
SEA12:17 amSeattle/Tacoma Intl
4h 04m
ORD6:21 amChicago O'Hare Intl
Alaska Airlines
Oct 10
ORD6:00 amChicago O'Hare Intl
4h 27m
SEA8:27 amSeattle/Tacoma Intl
Oct 13
SEA12:17 amSeattle/Tacoma Intl
4h 04m
ORD6:21 amChicago O'Hare Intl

See travel insights to Seattle from

How to get the cheapest flight ticket from Chicago 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 typical price of a round-trip flight between Chicago and Seattle?

What is the cheapest month to fly to Seattle?

In general, February is the cheapest month to fly from Chicago to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $214. If you don’t want to visit Seattle in February, then you should wait until September to fly from Chicago, when ticket prices are also cheap, with an average price of $226.

What is the cheapest day to depart on your flight to Seattle?

On average, the least expensive day to fly to Seattle from Chicago is on a Wednesday. momondo users have found tickets for Wednesday departures for as low as $331. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Sunday is the most expensive day to depart from Chicago because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $440.

What is the cheapest time of day to depart on your flight to Seattle?

Flying to Seattle from Chicago in the evening is the least expensive time of day to depart. momondo users have found prices as low as $326 when looking at flights departing in the evening. Flights to Seattle are more costly at noon, with an average ticket price of $384. Departure times at noon fall within the peak daily travel times, which is why tickets can be more expensive.

What is the cheapest Chicago to Seattle/Tacoma Intl flight route?

Fly from Chicago Midway to Seattle/Tacoma Intl for the best Chicago - Seattle/Tacoma Intl flight prices

How far in advance should I book a flight to Seattle?

You are more likely to see cheaper flights to Seattle from Chicago when booking weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around $284 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from Chicago for as low as $245 on momondo.

What cabin class options are available on Chicago to Seattle/Tacoma Intl flights?

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

How have Chicago to Seattle flight prices changed over time?

As of June 2025, prices for Chicago to Seattle flights are approximately 40% cheaper when compared to flights at the same time last year.

When to book flights from Chicago to Seattle

Are you open to changing your travel dates? Check out the ideal times to fly from Chicago to Seattle according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Chicago to Seattle (CHI to SEA) flight deals and tips

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

Best Price Found

$55

Fastest flight time

4h 27m

Direct flights

Every day

Airports in Seattle

1 airport
The best one-way flight to Seattle from Chicago in the past 72 hours is $55. The best round-trip flight deal from Chicago to Seattle found on momondo in the last 72 hours is $109.
The fastest flight from Chicago to Seattle takes 4h 27m
Direct flights go from Chicago to Seattle every day.
There is 1 airport near Seattle: Seattle/Tacoma Intl (SEA)

  • How far is Chicago to Seattle/Tacoma Intl by plane?

    The straight-line distance from Chicago to Seattle/Tacoma Intl is 1732.3 mi. By plane, this route typically takes 4h 27m.

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

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

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

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

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Chicago to Seattle/Tacoma Intl Airport.

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

    The travel and health documents you'll need for your trip to Seattle/Tacoma Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Seattle/Tacoma Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

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

  • What is the most popular airline from Chicago to Seattle?


Best airlines flying from Chicago to Seattle

Compare and see reviews for airlines that fly from Chicago to Seattle with momondo
Airline
Rating
Free Cancellation
Price
Hawaiian AirlinesPriceFrom $89Free CancellationRating
7.8
2,507 reviews
Search Hawaiian Airlines flights
Spirit AirlinesPriceFrom $105Free CancellationRating
6.3
8,066 reviews
Search Spirit Airlines flights
FrontierPriceFrom $118Free CancellationRating
5.9
3,301 reviews
Search Frontier flights
DeltaPriceFrom $135Free CancellationRating
8.0
7,964 reviews
Search Delta flights
Alaska AirlinesPriceFrom $156Free CancellationRating
8.0
10,000 reviews
Search Alaska Airlines flights
United AirlinesPriceFrom $163Free CancellationRating
7.4
8,810 reviews
Search United Airlines flights
American AirlinesPriceFrom $169Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
SouthwestPriceFrom $199Free CancellationRating
8.0
4,280 reviews
Search Southwest flights
  • Delta Flights From Chicago to Seattle

    Delta flies from Chicago to Seattle around 18 times per week, with 7,964 momondo users rating the airline 8.0/10. The cheapest Delta deal from Chicago to Seattle in the last 72 hours was $135 (round-trip), much lower than the average airfare cost of $352 for Delta flights on this route.

  • Alaska Airlines Flights From Chicago to Seattle

    Another popular option for Chicago to Seattle flights is Alaska Airlines (8.0/10, 10,000 ratings). Alaska Airlines flies from Chicago to Seattle around 19 times per week, with deals starting from $156 round-trip and rising to an average price of around $292.


Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Leavenworth
Tacoma
SeaTac
Ocean Shores
Olympia
Renton
Federal Way
Kent
Tukwila
Lynnwood
Puyallup
Kirkland
Marysville
Lakewood
Fife
Shoreline
Cle Elum
Centralia
Westport
Redmond

Why use momondo?

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

It is quick and easy to find Chicago to Seattle flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Seattle that suits you.

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

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

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

Once all potential Chicago to Seattle 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 Chicago to Seattle right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Chicago to Seattle flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.


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1 adult
Mon 6/23
Mon 6/30

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