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Cheap flights from Chicago to Seattle from £113

CHI — SEA
12 Nov — 19 Nov1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Chicago to Seattle

Enter your travel dates to find the best prices.

Cheapest flights from Chicago to Seattle

Fri 30/1017:30 -
Nonstop4h 46m
Wed 4/1117:30 -
Nonstop4h 04m
Deal found 9/10£209
Mon 26/1006:35 -
Nonstop4h 45m
Thu 29/1007:15 -
Nonstop4h 15m
Deal found 9/10£211
Tue 22/1206:00 -
Nonstop5h 00m
Tue 29/1217:48 -
Nonstop4h 11m
Deal found 9/10£212
Thu 29/1017:30 -
Nonstop4h 46m
Tue 3/1106:00 -
1 stop8h 32m
Deal found 9/10£217
Tue 27/1017:30 -
Nonstop4h 46m
Sat 31/1011:45 -
1 stop6h 45m
Deal found 9/10£218
Thu 10/1217:29 -
Nonstop4h 59m
Tue 15/1209:12 -
1 stop7h 48m
Deal found 9/10£221
Wed 25/1106:00 -
Nonstop4h 41m
Wed 2/1210:22 -
Nonstop4h 09m
Deal found 11/10£222
Sun 1/1106:20 -
1 stop6h 30m
Wed 4/1106:00 -
1 stop8h 32m
Deal found 9/10£224
Wed 25/1109:00 -
Nonstop4h 57m
Wed 2/1216:58 -
1 stop5h 55m
Deal found 11/10£225
Fri 27/1106:00 -
Nonstop4h 41m
Fri 4/1216:58 -
1 stop5h 55m
Deal found 13/10£226
Sat 7/1118:35 -
Nonstop4h 54m
Sat 7/1123:42 -
Nonstop3h 58m
Deal found 12/10£236
Fri 27/1106:00 -
Nonstop4h 41m
Fri 4/1210:22 -
Nonstop4h 09m
Deal found 13/10£236

Find flight deals from Chicago to Seattle

Round-trip from

£209

One-way from

£113

Popular in

June

Cheapest in

January

Average price

£282

Good one-way deal

£509 or less
Delta
  • Delta
  • 30/10-4/11
  • Nonstop
  • 8h 50m total
  • Chicago to Seattle
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Delta
  • Delta
  • 6/1-31/12
  • 1 total stop
  • 7h 10m total
  • Chicago to Seattle
Search Deals
Highest demand for flights based on searches. 15% potential increase in price (£34 potential increase over avg. return price).
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Cheapest flight prices on average. 2% potential price decrease (£5 potential savings vs. average return price).
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Average for round-trip flights in October 2026
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Price to beat on a one-way flight from Chicago (CHI) to Seattle/Tacoma Intl.
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Cheapflights Fare Finder

 
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

Cheapest return flight

ChicagoSeattle

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

ORDSEA

Chicago O'Hare Intl

Wed 25/11

17:55-20:38

Nonstop4h 43m

Seattle/Tacoma Intl

Wed 31/12

00:00-02:00

Nonstop0h 00m

£120

ChicagoSeattle

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

ORDSEA

Chicago O'Hare Intl

Sat 7/11

09:30-12:14

Nonstop4h 44m

Seattle/Tacoma Intl

Wed 31/12

00:00-02:00

Nonstop0h 00m

£120

ChicagoSeattle

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

ORDSEA

Chicago O'Hare Intl

Thu 5/11

06:35-09:20

Nonstop4h 45m

Seattle/Tacoma Intl

Wed 31/12

00:00-02:00

Nonstop0h 00m

£120

ChicagoSeattle

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

ORDSEA

Chicago O'Hare Intl

Wed 18/11

07:00-09:50

Nonstop4h 50m

Seattle/Tacoma Intl

Wed 31/12

00:00-02:00

Nonstop0h 00m

£120
Fastest return journey

ChicagoSeattle

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

ORDSEA

Chicago O'Hare Intl

Sat 7/11

12:00-14:37

Nonstop4h 37m

Seattle/Tacoma Intl

Wed 31/12

00:00-02:00

Nonstop0h 00m

£120

ChicagoSeattle

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

ORDSEA

Chicago O'Hare Intl

Thu 12/11

10:34-19:17

1 stop10h 43m

Seattle/Tacoma Intl

Wed 31/12

00:00-02:00

Nonstop0h 00m

£124

ChicagoSeattle

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

ORDSEA

Chicago O'Hare Intl

Tue 10/11

13:30-20:56

1 stop9h 26m

Seattle/Tacoma Intl

Wed 31/12

00:00-02:00

Nonstop0h 00m

£124

ChicagoSeattle

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

ORDSEA

Chicago O'Hare Intl

Thu 12/11

07:20-16:56

1 stop11h 36m

Seattle/Tacoma Intl

Wed 31/12

00:00-02:00

Nonstop0h 00m

£128

ChicagoSeattle

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

ORDSEA

Chicago O'Hare Intl

Tue 15/12

14:35-21:21

1 stop8h 46m

Seattle/Tacoma Intl

Wed 31/12

00:00-02:00

Nonstop0h 00m

£128

ChicagoSeattle

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

ORDSEA

Chicago O'Hare Intl

Thu 12/11

12:38-23:53

2 stops13h 15m

Seattle/Tacoma Intl

Wed 31/12

00:00-02:00

Nonstop0h 00m

£146

Flights are sorted by cheapest return flights first.

Deals found on 13/10

Showing 1-10 of 22 resultsSorted by cheapest first
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Best time to book a flight from Chicago to Seattle

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

Cheapflights Insights

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

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

Currently, January is the cheapest month in which you can book a flight from Chicago to Seattle (average of £164). Flying from Chicago to Seattle in July is currently the most expensive (average of £311). 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 CHI to SEA?

When flying from Chicago to Seattle, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 29% versus a flight in the afternoon.

Weekly flight availability from Chicago to Seattle

The most flights from CHI to SEA are scheduled on a Monday (55 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (21 on average).

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

Airfare is below average for this route at the moment.
Chicago to Seattle flights typically cost between £232 and £363 in October.
The cheapest return price found within the last 5 days was £209 on Delta (30 Oct–4 Nov).

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

Booking 34 days in advance of your planned departure date is, on average, the best time to get cheap flights from Chicago to Seattle. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

Related info for your journey

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

    Seattle/Tacoma Intl (SEA), located 11.4 mi from the city center, is the airport you fly into when you book flights from Chicago to Seattle. 0 airlines have flights to Seattle/Tacoma Intl from Chicago on a regular basis. Booking flights from Chicago to Seattle/Tacoma Intl should not be difficult; the airport handles an average of 34 inbound flights from Chicago per day.

  • How long is the flight from Chicago to Seattle?

    Departing from Chicago to Seattle will take you 4h 48m. The distance between Chicago and Seattle is about 1715 mi. Both multi-stop and direct flights can be found to your destination and back.

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

    The top 3 most reliable airlines when flying from Chicago to Seattle are Delta (71%), Royal Jordanian (68%) and Korean Air (65%).

  • What are the cheapest flights from Chicago to Seattle?

    While on average a flight from Chicago to Seattle is generally £509, our data shows the cheapest flight currently is £509. When looking at the most popular route, (Chicago O'Hare Intl - Seattle/Tacoma Intl), you can expect to pay £225 for that flight.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Chicago to Seattle 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 Chicago to Seattle?

    Currently, January is the cheapest month in which you can book a flight from Chicago to Seattle (average of £164). Flying from Chicago to Seattle in July is currently the most expensive (average of £311). 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

Travelling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Federal Way
SeaTac

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for Chicago to Seattle

O'Hare Intl to Seattle flights

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Yes, we can. To see specific flights from Chicago to Seattle with no change fees, users can toggle flexible booking options after using the search form above to find flights.

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Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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