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Cheap flights from Chicago O'Hare Intl Airport to Seattle from £66

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 19/2. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — SEA
21 Feb — 28 Feb1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Chicago O'Hare Intl to Seattle/Tacoma Intl are usually found in February or September, booked 42 days in advance, depart on a Wednesday or Thursday and return on a Monday

Cheap flight deals from O'Hare Intl to Seattle

Enter your travel dates to find the best prices.

Cheapest flights from O'Hare Intl to Seattle
Explore the most affordable flight options available from O'Hare Intl to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 22 January 2026.

Sat 14/216:20
ORD
-
SEA
Nonstop4h 43m
United Airlines
Sat 21/207:00
SEA
-
ORD
Nonstop4h 06m
United Airlines
Deal found 20/1£132
Fri 6/314:20
ORD
-
SEA
Nonstop4h 40m
Delta
Mon 9/317:55
SEA
-
ORD
Nonstop3h 56m
Delta
Deal found 21/1£133
Thu 12/214:20
ORD
-
SEA
Nonstop4h 40m
Delta
Wed 18/217:55
SEA
-
ORD
Nonstop3h 57m
Delta
Deal found 21/1£133
Thu 12/216:20
ORD
-
SEA
Nonstop4h 43m
United Airlines
Fri 20/212:32
SEA
-
ORD
1 stop8h 54m
United Airlines
Deal found 20/1£136
Thu 12/215:54
ORD
-
SEA
Nonstop4h 46m
Alaska Airlines
Wed 18/222:48
SEA
-
ORD
1 stop12h 23m
Alaska Airlines
Deal found 20/1£139
Thu 5/320:01
ORD
-
SEA
Nonstop4h 44m
United Airlines
Sun 8/307:00
SEA
-
ORD
Nonstop4h 06m
United Airlines
Deal found 21/1£140
Thu 12/316:20
ORD
-
SEA
Nonstop4h 43m
United Airlines
Fri 13/323:59
SEA
-
ORD
Nonstop3h 57m
United Airlines
Deal found 20/1£141
Mon 9/307:00
ORD
-
SEA
Nonstop4h 51m
Alaska Airlines
Mon 9/312:56
SEA
-
ORD
1 stop9h 03m
Alaska Airlines
Deal found 20/1£142
Mon 16/320:01
ORD
-
SEA
Nonstop4h 44m
United Airlines
Fri 20/323:59
SEA
-
ORD
Nonstop3h 57m
United Airlines
Deal found 19/1£144
Fri 20/216:20
ORD
-
SEA
Nonstop4h 43m
United Airlines
Sun 22/207:00
SEA
-
ORD
Nonstop4h 06m
United Airlines
Deal found 21/1£146
Tue 10/215:44
ORD
-
SEA
1 stop8h 31m
Alaska Airlines
Sat 14/217:55
SEA
-
ORD
Nonstop4h 01m
Alaska Airlines
Deal found 20/1£147
Sat 7/207:30
ORD
-
SEA
Nonstop4h 45m
Delta
Tue 10/207:10
SEA
-
ORD
Nonstop4h 12m
Delta
Deal found 20/1£152

Find flight deals from O'Hare Intl to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from O'Hare Intl (ORD) 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 22 January 2026.

Round-trip from

£132

One-way from

£66

Popular in

June

Cheapest in

February

Average price

£193
Delta
  • Delta
  • 14/2-19/2
  • Nonstop
  • 8h 57m total
  • Chicago to Seattle
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Delta
  • Delta
  • 15/2
  • Nonstop
  • 4h 45m total
  • Chicago to Seattle
Search Deals
Highest demand for flights based on searches. 9% potential increase in price (£16 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (£3 potential savings vs. average return price).
Search Deals
Average for round-trip flights in January 2026
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Cheapflights Fare Finder

 
Customise your flight search to find flights from O'Hare Intl 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 22 January 2026.
Use the filters below to find and compare flights from Chicago O'Hare Intl Airport to Seattle that are best for you.

Fly from

O'Hare Intl

Fly to

Seattle

Route

Depart

Return

Price

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Sat 28/2

16:20-19:03

Nonstop4h 43m

Seattle/Tacoma Intl

Sat 28/2

23:59-05:56

Nonstop3h 57m

£132

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Mon 9/3

07:25-10:03

Nonstop4h 38m

Seattle/Tacoma Intl

Wed 11/3

17:55-23:51

Nonstop3h 56m

£132

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Thu 19/2

14:20-17:00

Nonstop4h 40m

Seattle/Tacoma Intl

Tue 24/2

07:10-13:22

Nonstop4h 12m

£132

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Thu 2/4

19:55-22:37

Nonstop4h 42m

Seattle/Tacoma Intl

Tue 7/4

23:59-05:59

Nonstop4h 00m

£132

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Mon 16/2

07:40-10:25

Nonstop4h 45m

Seattle/Tacoma Intl

Tue 24/2

17:55-23:52

Nonstop3h 57m

£132

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Sun 15/2

07:40-10:25

Nonstop4h 45m

Seattle/Tacoma Intl

Wed 25/2

17:55-23:52

Nonstop3h 57m

£132

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Tue 17/2

14:20-17:00

Nonstop4h 40m

Seattle/Tacoma Intl

Sat 28/2

17:55-23:52

Nonstop3h 57m

£132

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Thu 12/2

07:00-09:51

Nonstop4h 51m

Seattle/Tacoma Intl

Wed 18/2

21:40-13:11

1 stop13h 31m

£139

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Mon 9/3

15:54-18:40

Nonstop4h 46m

Seattle/Tacoma Intl

Wed 11/3

13:56-23:59

1 stop8h 03m

£147

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Wed 4/3

17:29-20:16

Nonstop4h 47m

Seattle/Tacoma Intl

Tue 10/3

13:56-23:59

1 stop8h 03m

£147

Flights are sorted by cheapest return flights first.

Deals found on 20/1

Showing 1-10 of 21 results
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Best time to book a flight from O'Hare Intl to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from O'Hare Intl 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 O'Hare Intl Airport to Seattle

How far ahead should I book a flight from Chicago O'Hare Intl Airport to Seattle?

Use this chart to determine the optimal time to book a return flight from O'Hare Intl to Seattle. Price data was last updated on 16 January 2026.

The best time to book flights from Chicago O'Hare Intl Airport to Seattle is 42 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.

What is the cheapest month to book a flight from Chicago O'Hare Intl Airport to Seattle?

Currently, October is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to Seattle (average of £83). Flying from Chicago O'Hare Intl Airport to Seattle in December is currently the most expensive (average of £133). 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 ORD to SEA?

Find hourly flight availability from O'Hare Intl 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 22 January 2026.

A simple way to save on the total cost of your ticket is to fly from Chicago O'Hare Intl Airport to Seattle in the evening. If you’re flexible enough to do this you can expect to save up to 40% on your trip compared to booking a flight in the afternoon.

Related info for your journey

Find useful and relevant information for your journey from O'Hare Intl 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 O'Hare Intl?

    Seattle/Tacoma Intl (SEA) is the airport you will fly into if you book a flight from Chicago O'Hare Intl to Seattle. You should not have trouble finding flights to Seattle/Tacoma Intl from Chicago O'Hare Intl; the airport handles an average of 23 inbound flights from Chicago O'Hare Intl per day. You should also have plenty of airline options to choose from since 0 airlines have flights to the Seattle airport from Chicago O'Hare Intl. It is only a 11.4 mi journey from Seattle/Tacoma Intl (SEA) to Seattle’s city center.

  • How long is the flight from Chicago O'Hare Intl Airport to Seattle?

    For as low as £132, United Airlines can have you in Seattle from Chicago O'Hare Intl Airport in 4h 38m. The distance from Chicago O'Hare Intl Airport to Seattle is about 1715 mi. Most flights are nonstop.

  • What are the most reliable airlines from Chicago O'Hare Intl Airport to Seattle?

    Before booking your flight to Seattle from Chicago O'Hare Intl Airport, check out the most reliable airlines to get you to your destination on time: Brussels Airlines (72%), United Airlines (66%), American Airlines( 65%).

  • Can I find deals for flights from O'Hare Intl to Seattle that include hotel bookings?

    Yes. In addition to deals on O'Hare Intl to Seattle flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from O'Hare Intl to Seattle?

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

  • Can I find deals for business class flights from O'Hare Intl to Seattle?

    Yes. Cheapflights offers flight deals from O'Hare Intl 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 O'Hare Intl Airport to Seattle?

    Currently, October is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to Seattle (average of £83). Flying from Chicago O'Hare Intl Airport to Seattle in December is currently the most expensive (average of £133). 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?

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Tacoma
Federal Way
SeaTac

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Why should you use Cheapflights to find cheap flight tickets from O'Hare Intl to Seattle?

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Can Cheapflights find flights from O'Hare Intl to Seattle with no change fees?

Certainly. Search results for flights to Seattle from O'Hare Intl shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from O'Hare Intl to Seattle become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Seattle from O'Hare Intl today and book when prices fit your budget.

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