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Cheap flights from Chicago to Seattle from £94

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 13/5. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — SEA
17 May — 24 May1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Chicago to Seattle/Tacoma Intl are usually found in January or February, booked 52 days in advance, depart on a Tuesday or Wednesday and return on a Monday

Cheap flight deals from Chicago to Seattle

Enter your travel dates to find the best prices.

Cheapest flights from Chicago to Seattle
Explore the most affordable flight options available from Chicago to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 April 2026.

Wed 6/508:55
ORD
-
SEA
Nonstop4h 44m
United Airlines
Wed 20/523:53
SEA
-
ORD
Nonstop4h 01m
United Airlines
Deal found 13/4£188
Tue 5/512:40
ORD
-
SEA
1 stop7h 20m
United Airlines
Tue 12/523:53
SEA
-
ORD
Nonstop4h 01m
United Airlines
Deal found 13/4£196
Tue 12/516:50
ORD
-
SEA
1 stop9h 05m
Southwest
Sat 16/513:20
SEA
-
ORD
1 stop7h 00m
Southwest
Deal found 16/4£203
Sat 23/509:00
ORD
-
SEA
1 stop13h 28m
Alaska Airlines
Sat 23/500:09
SEA
-
ORD
Nonstop4h 11m
Alaska Airlines
Deal found 15/4£204
Tue 12/520:04
ORD
-
SEA
Nonstop4h 43m
United Airlines
Sat 16/519:36
SEA
-
ORD
1 stop8h 04m
United Airlines
Deal found 15/4£205
Tue 12/514:15
ORD
-
SEA
1 stop8h 51m
United Airlines
Wed 20/523:53
SEA
-
ORD
Nonstop4h 01m
United Airlines
Deal found 16/4£206
Wed 13/513:20
ORD
-
SEA
1 stop8h 28m
United Airlines
Wed 20/522:53
SEA
-
ORD
Nonstop4h 10m
United Airlines
Deal found 14/4£208
Wed 6/508:50
ORD
-
SEA
1 stop9h 20m
Alaska Airlines
Sat 9/517:42
SEA
-
ORD
Nonstop4h 17m
Alaska Airlines
Deal found 12/4£210
Sat 9/507:12
ORD
-
SEA
Nonstop4h 35m
Delta
Sat 16/517:45
SEA
-
ORD
Nonstop4h 12m
Delta
Deal found 12/4£211
Sat 2/516:15
ORD
-
SEA
1 stop7h 45m
Southwest
Sat 9/505:45
SEA
-
ORD
1 stop6h 35m
Southwest
Deal found 12/4£216

Find flight deals from Chicago to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Chicago (CHI) to Seattle (SEA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 17 April 2026.

Round-trip from

£188

One-way from

£94

Popular in

June

Cheapest in

January

Average price

£212

Good one-way deal

£497 or less
United Airlines
  • United Airlines
  • 6/5-20/5
  • Nonstop
  • 8h 45m total
  • Chicago to Seattle
Search Deals
Delta
  • Delta
  • 13/5
  • Nonstop
  • 4h 30m total
  • Chicago to Seattle
Search Deals
Highest demand for flights based on searches. 9% potential increase in price (£15 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£4 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 2026
Search Deals
Price to beat on a one-way flight from Chicago (CHI) to Seattle/Tacoma Intl.
Search Deals

Cheapflights 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, Cheapflights users made 858,174 searches. Data last updated 17 April 2026.
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 - SEA

ORDSEA

Chicago O'Hare Intl

Tue 5/5

20:48-23:29

Nonstop4h 41m

Seattle/Tacoma Intl

Sat 9/5

13:28-19:52

Nonstop4h 24m

£225

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Thu 30/4

20:48-23:29

Nonstop4h 41m

Seattle/Tacoma Intl

Tue 5/5

17:42-23:59

Nonstop4h 17m

£225

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Tue 5/5

10:30-16:55

1 stop8h 25m

Seattle/Tacoma Intl

Tue 12/5

06:50-18:50

1 stop10h 00m

£240

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Wed 6/5

07:45-16:55

2 stops11h 10m

Seattle/Tacoma Intl

Tue 12/5

05:30-18:50

2 stops11h 20m

£240

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Tue 12/5

14:15-21:06

1 stop8h 51m

Seattle/Tacoma Intl

Fri 22/5

17:00-23:07

Nonstop4h 07m

£243

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Wed 6/5

08:50-16:10

1 stop9h 20m

Seattle/Tacoma Intl

Sun 10/5

07:02-19:03

1 stop10h 01m

£255

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Sat 9/5

17:19-22:48

1 stop7h 29m

Seattle/Tacoma Intl

Sat 16/5

17:45-23:57

Nonstop4h 12m

£255

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Sat 27/6

17:55-20:35

Nonstop4h 40m

Seattle/Tacoma Intl

Sun 5/7

07:20-13:30

Nonstop4h 10m

£262

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Sat 25/7

07:00-09:40

Nonstop4h 40m

Seattle/Tacoma Intl

Mon 27/7

23:52-05:58

Nonstop4h 06m

£262

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Sat 20/6

06:55-09:31

Nonstop4h 36m

Seattle/Tacoma Intl

Sun 5/7

07:20-13:30

Nonstop4h 10m

£262

Flights are sorted by cheapest return flights first.

Deals found on 12/4

Showing 1-10 of 24 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
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

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

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

Use this chart to determine the optimal time to book a return flight from Chicago to Seattle. Price data was last updated on 10 April 2026.

Booking 52 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.

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 £65). Flying from Chicago to Seattle in February is currently the most expensive (average of £465). 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?

Find hourly flight availability from Chicago to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 17 April 2026.

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 52% versus a flight in the morning.

Weekly flight availability from Chicago to Seattle

Explore weekly flight availability from Chicago to Seattle. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 17 April 2026.

The most flights from CHI to SEA are scheduled on a Friday (51 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (26 on average).

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

Related info for your journey

Find useful and relevant information for your journey from Chicago to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • 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 39 inbound flights from Chicago per day.

  • How long is the flight from Chicago to Seattle?

    Departing from Chicago to Seattle will take you 4h 41m. 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 Air Tahiti Nui (89%), Scandinavian Airlines (84%) and Brussels Airlines (77%).

  • What are the cheapest flights from Chicago to Seattle?

    While on average a flight from Chicago to Seattle is generally £497, our data shows the cheapest flight currently is £497. When looking at the most popular route, (Chicago O'Hare Intl - Seattle/Tacoma Intl), you can expect to pay £262 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 £65). Flying from Chicago to Seattle in February is currently the most expensive (average of £465). 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
Tacoma
Federal Way
SeaTac

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Alternative routes for Chicago to Seattle

See prices for flight routes from nearby airports that may be better suited for you.
O'Hare Intl to Seattle flights

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How does Cheapflights help users find flights from Chicago to Seattle?

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Can Cheapflights find flights from Chicago to Seattle with no change fees?

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.

Can Cheapflights notify me if prices for flights from Chicago to Seattle become cheaper?

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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