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Cheap flights from Chicago to Seattle from £68

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 31/10. 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 return flights

Hawaiian Airlines Logo
06:20 - 08:52ORD-SEA
4h 32mdirect
Hawaiian Airlines Logo
17:55 - 00:03SEA-ORD
4h 08mdirect
£128Hawaiian Airlines
Find Deal
Sat, 13 Sep - Sat, 20 Sep
Hawaiian Airlines Logo
06:20 - 08:50ORD-SEA
4h 30mdirect
Hawaiian Airlines Logo
17:55 - 23:59SEA-ORD
4h 04mdirect
£135Hawaiian Airlines
Find Deal
Sat, 23 Aug - Sun, 31 Aug
Hawaiian Airlines Logo
07:45 - 10:36ORD-SEA
4h 51mdirect
Hawaiian Airlines Logo
11:45 - 17:50SEA-ORD
4h 05mdirect
£137Hawaiian Airlines
Find Deal
Wed, 7 Jan - Wed, 7 Jan
Alaska Airlines Logo
06:20 - 08:50ORD-SEA
4h 30mdirect
Alaska Airlines Logo
00:59 - 07:03SEA-ORD
4h 04mdirect
£138Alaska Airlines
Find Deal
Wed, 27 Aug - Sat, 30 Aug
Alaska Airlines Logo
10:05 - 12:45ORD-SEA
4h 40mdirect
Alaska Airlines Logo
17:50 - 23:59SEA-ORD
4h 09mdirect
£140Alaska Airlines
Find Deal
Sat, 11 Oct - Sat, 18 Oct
American Airlines Logo
18:01 - 20:46ORD-SEA
4h 45mdirect
American Airlines Logo
00:34 - 06:42SEA-ORD
4h 08mdirect
£143American Airlines
Find Deal
Sat, 11 Oct - Fri, 17 Oct
United Airlines Logo
07:10 - 09:43ORD-SEA
4h 33mdirect
United Airlines Logo
08:00 - 18:25SEA-ORD
8h 25m1 stop
£146United Airlines
Find Deal
Sat, 6 Sep - Tue, 9 Sep
United Airlines Logo
19:35 - 22:20ORD-SEA
4h 45mdirect
United Airlines Logo
07:10 - 17:10SEA-ORD
8h 00m1 stop
£157United Airlines
Find Deal
Fri, 19 Sep - Tue, 23 Sep
Delta Logo
07:15 - 09:45ORD-SEA
4h 30mdirect
Delta Logo
17:50 - 23:51SEA-ORD
4h 01mdirect
£158Delta
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Tue, 19 Aug - Wed, 27 Aug
Delta Logo
07:15 - 09:45ORD-SEA
4h 30mdirect
Delta Logo
19:30 - 08:24SEA-ORD
10h 54m2 stops
£185Delta
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Wed, 20 Aug - Sat, 30 Aug

Hawaiian Airlines flights from Chicago to Seattle

Our best Hawaiian Airlines deals on Chicago to Seattle flight tickets
Hawaiian Airlines
13 Sept
ORD06:20Chicago O'Hare Intl
4h 32m
SEA08:52Seattle/Tacoma Intl
20 Sept
SEA17:55Seattle/Tacoma Intl
4h 08m
ORD00:03Chicago O'Hare Intl
£128
Find similar
Hawaiian Airlines
23 Aug
ORD06:20Chicago O'Hare Intl
4h 30m
SEA08:50Seattle/Tacoma Intl
31 Aug
SEA17:55Seattle/Tacoma Intl
4h 04m
ORD23:59Chicago O'Hare Intl
£135
Find similar
Hawaiian Airlines
7 Jan
ORD07:45Chicago O'Hare Intl
4h 51m
SEA10:36Seattle/Tacoma Intl
7 Jan
SEA11:45Seattle/Tacoma Intl
4h 05m
ORD17:50Chicago O'Hare Intl
£137
Find similar

Alaska Airlines flights from Chicago to Seattle

Our best Alaska Airlines deals on Chicago to Seattle flight tickets
Alaska Airlines
27 Aug
ORD06:20Chicago O'Hare Intl
4h 30m
SEA08:50Seattle/Tacoma Intl
30 Aug
SEA00:59Seattle/Tacoma Intl
4h 04m
ORD07:03Chicago O'Hare Intl
£138
Find similar
Alaska Airlines
11 Oct
ORD10:05Chicago O'Hare Intl
4h 40m
SEA12:45Seattle/Tacoma Intl
18 Oct
SEA17:50Seattle/Tacoma Intl
4h 09m
ORD23:59Chicago O'Hare Intl
£140
Find similar
Alaska Airlines
19 Aug
ORD07:00Chicago O'Hare Intl
9h 25m
1 stop
SEA14:25Seattle/Tacoma Intl
31 Aug
SEA17:55Seattle/Tacoma Intl
4h 04m
ORD23:59Chicago O'Hare Intl
£146
Find similar

momondo Fare Finder

 
Customise your flight search to find flights from Chicago to Seattle that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 279,928 searches. Data last updated 31 July 2025.
Use the filters below to find and compare flights from Chicago to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Sat 13/9

06:20-08:52

Nonstop4h 32m

Seattle/Tacoma Intl

Sat 20/9

17:55-00:03

Nonstop4h 08m

£128

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Sat 23/8

06:20-08:50

Nonstop4h 30m

Seattle/Tacoma Intl

Sun 31/8

17:55-23:59

Nonstop4h 04m

£135

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Wed 7/1

07:45-10:36

Nonstop4h 51m

Seattle/Tacoma Intl

Wed 7/1

11:45-17:50

Nonstop4h 05m

£137

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Wed 27/8

06:20-08:50

Nonstop4h 30m

Seattle/Tacoma Intl

Sat 30/8

00:59-07:03

Nonstop4h 04m

£138

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Sat 11/10

10:05-12:45

Nonstop4h 40m

Seattle/Tacoma Intl

Sat 18/10

17:50-23:59

Nonstop4h 09m

£140

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Sat 11/10

18:01-20:46

Nonstop4h 45m

Seattle/Tacoma Intl

Fri 17/10

00:34-06:42

Nonstop4h 08m

£143

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Sat 6/9

07:10-09:43

Nonstop4h 33m

Seattle/Tacoma Intl

Tue 9/9

08:00-18:25

1 stop8h 25m

£146

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Fri 19/9

19:35-22:20

Nonstop4h 45m

Seattle/Tacoma Intl

Tue 23/9

07:10-17:10

1 stop8h 00m

£157

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Tue 19/8

07:15-09:45

Nonstop4h 30m

Seattle/Tacoma Intl

Wed 27/8

17:50-23:51

Nonstop4h 01m

£158

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Wed 20/8

07:15-09:45

Nonstop4h 30m

Seattle/Tacoma Intl

Sat 30/8

19:30-08:24

2 stops10h 54m

£185

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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 cheapest month to fly to Seattle?

The cheapest month to fly to Seattle from Chicago is in February. Flight prices, which tend to average around £161, are often lower during this time because this is during the off-season. The month of September is another great option to travel to Seattle, with average flight prices from Chicago averaging around £167.

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

According to our data, Friday is the cheapest day to fly to Seattle from Chicago. The lowest ticket price found for a Friday departure recently was £220. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. Be sure to avoid booking your departure on a Saturday as prices are generally higher than usual. According to our data, the average ticket price to Seattle on Saturday is £486.

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

According to our data, the cheapest time of day to fly to Seattle is in the evening. momondo users have found flights departing from Chicago to Seattle in the evening for as low as £220. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights in the afternoon are often more expensive, with an average ticket price of £308.

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

Fly from Chicago O'Hare Intl 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 £212 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from Chicago for as low as £182 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 July 2025, prices for Chicago to Seattle flights are approximately 37% 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 return 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

£68

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 £68. The best return flight deal from Chicago to Seattle found on momondo in the last 72 hours is £128.
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)
Search flight deals

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

    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 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 required for your trip to Seattle/Tacoma Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Seattle/Tacoma Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

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

Travelling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Kent
SeaTac
Fife
Tukwila
Renton

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Chicago to Seattle for you.

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

Yes. All flights to Seattle from Chicago on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

Once you have performed a search for Chicago 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 Chicago to Seattle right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Chicago to Seattle flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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