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Cheap flights from Seattle to Chicago from £120

SEA — CHI
12 Dec — 19 Dec1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Seattle to Chicago

Enter your travel dates to find the best prices.

Cheapest flights from Seattle to Chicago

Thu 10/1211:30 -
1 stop8h 26m
Sun 13/1207:45 -
1 stop11h 30m
Deal found 11/11£208
Tue 1/1207:00 -
Nonstop4h 10m
Sat 5/1208:55 -
Nonstop4h 49m
Deal found 10/11£209
Tue 1/1207:00 -
Nonstop4h 10m
Tue 8/1213:30 -
1 stop9h 31m
Deal found 7/11£210
Tue 1/1207:20 -
Nonstop4h 10m
Tue 15/1214:04 -
1 stop6h 43m
Deal found 10/11£213
Sat 5/1213:05 -
Nonstop4h 05m
Tue 8/1214:13 -
1 stop8h 43m
Deal found 7/11£213
Tue 8/1209:12 -
1 stop7h 48m
Sat 12/1206:00 -
Nonstop4h 57m
Deal found 10/11£216
Tue 1/1217:50 -
Nonstop4h 07m
Thu 3/1207:45 -
1 stop9h 26m
Deal found 10/11£216
Wed 2/1216:04 -
1 stop5h 55m
Mon 7/1210:25 -
1 stop7h 57m
Deal found 9/11£221
Tue 15/1207:15 -
1 stop8h 00m
Mon 21/1214:27 -
Nonstop4h 48m
Deal found 10/11£224
Tue 29/1217:52 -
Nonstop4h 07m
Wed 6/114:25 -
Nonstop4h 40m
Deal found 10/11£225
Sun 13/1217:50 -
Nonstop4h 07m
Mon 14/1206:40 -
Nonstop4h 57m
Deal found 9/11£225

Find flight deals from Seattle to Chicago

Round-trip from

£208

One-way from

£120

Popular in

June

Cheapest in

February

Average price

£294
Delta
  • Delta
  • 10/12-13/12
  • 2 total stops
  • 19h 56m total
  • Seattle to Chicago
Search Deals
United Airlines
  • United Airlines
  • 12/1-31/12
  • 1 total stop
  • 6h 21m total
  • Seattle to Chicago
Search Deals
Highest demand for flights based on searches. 10% potential increase in price (£22 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (£4 potential savings vs. average return price).
Search Deals
Average for round-trip flights in November 2026
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Cheapflights Fare Finder

 
Use the filters below to find and compare flights from Seattle to Chicago that are best for you.

Fly from

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Route

Depart

Return

Price

Cheapest return flight

SeattleChicago

SEA Seattle/Tacoma Intl - ORD Chicago O'Hare Intl

SEAORD

Seattle/Tacoma Intl

Thu 24/12

17:52-23:59

Nonstop4h 07m

Chicago O'Hare Intl

Wed 31/12

00:00-22:00

Nonstop0h 00m

£124

SeattleChicago

SEA Seattle/Tacoma Intl - ORD Chicago O'Hare Intl

SEAORD

Seattle/Tacoma Intl

Tue 15/12

07:05-19:00

1 stop9h 55m

Chicago O'Hare Intl

Wed 31/12

00:00-22:00

Nonstop0h 00m

£128

SeattleChicago

SEA Seattle/Tacoma Intl - ORD Chicago O'Hare Intl

SEAORD

Seattle/Tacoma Intl

Fri 1/1

14:10-20:23

Nonstop4h 13m

Chicago O'Hare Intl

Wed 31/12

00:00-22:00

Nonstop0h 00m

£143

SeattleChicago

SEA Seattle/Tacoma Intl - ORD Chicago O'Hare Intl

SEAORD

Seattle/Tacoma Intl

Sun 20/12

17:48-23:59

Nonstop4h 11m

Chicago O'Hare Intl

Wed 31/12

00:00-22:00

Nonstop0h 00m

£146

SeattleChicago

SEA Seattle/Tacoma Intl - ORD Chicago O'Hare Intl

SEAORD

Seattle/Tacoma Intl

Sun 20/12

17:52-23:59

Nonstop4h 07m

Chicago O'Hare Intl

Wed 31/12

00:00-22:00

Nonstop0h 00m

£150

SeattleChicago

SEA Seattle/Tacoma Intl - ORD Chicago O'Hare Intl

SEAORD

Seattle/Tacoma Intl

Wed 23/12

23:44-05:58

Nonstop4h 14m

Chicago O'Hare Intl

Wed 31/12

00:00-22:00

Nonstop0h 00m

£156

SeattleChicago

SEA Seattle/Tacoma Intl - ORD Chicago O'Hare Intl

SEAORD

Seattle/Tacoma Intl

Thu 11/2

21:50-13:09

1 stop13h 19m

Chicago O'Hare Intl

Wed 31/12

00:00-22:00

Nonstop0h 00m

£157

SeattleChicago

SEA Seattle/Tacoma Intl - ORD Chicago O'Hare Intl

SEAORD

Seattle/Tacoma Intl

Fri 1/1

23:59-09:19

1 stop7h 20m

Chicago O'Hare Intl

Wed 31/12

00:00-22:00

Nonstop0h 00m

£176
Fastest return journey

SeattleChicago

SEA Seattle/Tacoma Intl - ORD Chicago O'Hare Intl

SEAORD

Seattle/Tacoma Intl

Sun 21/3

07:00-13:06

Nonstop4h 06m

Chicago O'Hare Intl

Wed 31/12

00:00-22:00

Nonstop0h 00m

£180

SeattleChicago

SEA Seattle/Tacoma Intl - ORD Chicago O'Hare Intl

SEAORD

Seattle/Tacoma Intl

Fri 18/12

23:44-05:58

Nonstop4h 14m

Chicago O'Hare Intl

Wed 31/12

00:00-22:00

Nonstop0h 00m

£188

Flights are sorted by cheapest return flights first.

Deals found on 8/11

Showing 1-10 of 20 resultsSorted by cheapest first
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Best time to book a flight from Seattle to Chicago

Have a flexible travel schedule? Discover the best time to fly to Chicago from Seattle with our price prediction graph.
Estimated return price

Cheapflights Insights

Everything you need to know about your flight from Seattle to Chicago

What is the cheapest month to book a flight from Seattle to Chicago?

Currently, February is the cheapest month in which you can book a flight from Seattle to Chicago (average of £181). Flying from Seattle to Chicago in June is currently the most expensive (average of £310). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from SEA to CHI?

When flying from Seattle to Chicago, the time of day you fly usually plays a role in the price. Save by searching for a flight in the afternoon, which can drop the price by up to 65% versus a flight at midday.

Weekly flight availability from Seattle to Chicago

The most flights from SEA to CHI are scheduled on a Tuesday (45 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (23 on average).

How much does it cost for a return flight from Seattle to Chicago?

Airfare is below average for this route at the moment.
Seattle to Chicago flights typically cost between £238 and £375 in December.
The cheapest return price found within the last 5 days was £208 on Delta (10 Dec–13 Dec).

How far ahead should I book a flight from Seattle to Chicago?

The best time to book flights from Seattle to Chicago is 64 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

Related info for your journey

  • What airport do you fly from for flights from Seattle to Chicago?

    If you book a flight to Chicago from Seattle, you will be flying from Seattle/Tacoma Intl, which is the city’s only airport. Seattle/Tacoma Intl (SEA) is located 11.4 mi from the center of Seattle. There are 35 flights from Seattle/Tacoma Intl to Chicago per day from 0 different airlines.

  • How long is the flight from Seattle to Chicago?

    Airlines like Delta and Alaska Airlines fly from Seattle to Chicago in about 3h 57m. The time it takes to get you to your destination can typically vary by up to 5h 37m. Airlines will cover a distance of 1715 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • What are the most reliable airlines from Seattle to Chicago?

    Before booking your flight to Chicago from Seattle, check out the most reliable airlines to get you to your destination on time: Porter Airlines (90%), Air France (88%), Avianca( 86%).

  • Can I find deals for flights from Seattle to Chicago that include hotel bookings?

    Yes. In addition to deals on Seattle to Chicago flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Seattle to Chicago?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Chicago.

  • Can I find deals for business class flights from Seattle to Chicago?

    Yes. Cheapflights offers flight deals from Seattle to Chicago by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Seattle to Chicago?

    Currently, February is the cheapest month in which you can book a flight from Seattle to Chicago (average of £181). Flying from Seattle to Chicago in June is currently the most expensive (average of £310). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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When you search for this flight from Seattle to Chicago, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Why should you use Cheapflights to find cheap flight tickets from Seattle to Chicago?

Cheapflights helps you find that perfect flight to Chicago from Seattle by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

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Cheapflights does show flights with no change fees to all users. To see these options for flights from Seattle to Chicago, users can toggle the no change fees filter when performing a flight search.

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