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Cheap flights from Chicago O'Hare Intl Airport to Seattle from £74

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 30/1. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — SEA
9 Nov — 16 Nov1
1 adult
1 adult, Economy

Cheapflights Tip: The best prices from Chicago O'Hare Intl to Seattle/Tacoma Intl are usually found in September or February, booked 78 days in advance, depart on a Tuesday or Wednesday and return on a Monday

Cheap 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 10 October 2025.

Round-trip from

£133

One-way from

£74

Popular in

December

Cheapest in

September

Average price

£193

Good one-way deal

£98 or less
Delta
  • Delta
  • 31/10-4/11
  • Nonstop
  • 8h 33m total
  • Chicago to Seattle
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Alaska Airlines
  • Alaska Airlines
  • 9/1
  • 1 total stop
  • 8h 29m total
  • Chicago to Seattle
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Highest demand for flights based on searches. 9% potential increase in price (£16 potential increase over avg. return price).
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Cheapest flight prices on average. 2% potential price decrease (£4 potential savings vs. average return price).
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Average for round-trip flights in October 2025
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Price to beat on a one-way flight from Chicago O'Hare Intl to Seattle/Tacoma Intl.
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Find 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 10 October 2025.

Fri 31/1018:00ORD - SEA
Nonstop4h 45mDelta
Sat 1/1117:55SEA - ORD
Nonstop3h 59mDelta
Deal found 10/10£133
Fri 31/1018:00ORD - SEA
Nonstop4h 45mDelta
Sat 8/1117:55SEA - ORD
Nonstop3h 55mDelta
Deal found 10/10£134
Fri 31/1007:00ORD - SEA
1 stop9h 46mAlaska Airlines
Sat 8/1118:15SEA - ORD
Nonstop4h 09mAlaska Airlines
Deal found 10/10£140
Wed 3/1214:30ORD - SEA
1 stop9h 53mDelta
Fri 5/1206:00SEA - ORD
1 stop8h 57mDelta
Deal found 9/10£148
Fri 31/1007:00ORD - SEA
1 stop9h 40mSouthwest
Tue 4/1107:05SEA - ORD
1 stop13h 30mSouthwest
Deal found 10/10£152
Fri 31/1007:00ORD - SEA
1 stop9h 46mAlaska Airlines
Tue 4/1111:50SEA - ORD
1 stop10h 09mAlaska Airlines
Deal found 10/10£155
Thu 20/1106:00ORD - SEA
1 stop6h 54mDelta
Fri 28/1123:55SEA - ORD
1 stop6h 35mDelta
Deal found 9/10£155
Sat 8/1108:00ORD - SEA
Nonstop4h 44mAlaska Airlines
Mon 10/1100:20SEA - ORD
Nonstop4h 02mAlaska Airlines
Deal found 9/10£160
Fri 7/1107:00ORD - SEA
1 stop9h 46mAlaska Airlines
Sun 9/1112:56SEA - ORD
1 stop14h 05mAlaska Airlines
Deal found 8/10£162
Wed 24/1216:01ORD - SEA
1 stop9h 30mDelta
Mon 29/1222:55SEA - ORD
1 stop8h 06mDelta
Deal found 9/10£163
Wed 12/1120:59ORD - SEA
1 stop25h 35mAlaska Airlines
Thu 13/1100:20SEA - ORD
Nonstop4h 02mAlaska Airlines
Deal found 9/10£165

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 10 October 2025.
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

Fri 9/1

13:20-16:01

Nonstop4h 41m

Seattle/Tacoma Intl

Mon 12/1

12:35-23:14

1 stop8h 39m

£137

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Wed 3/12

14:30-22:23

1 stop9h 53m

Seattle/Tacoma Intl

Sun 7/12

17:55-23:59

Nonstop4h 04m

£140

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Tue 27/1

14:06-18:46

1 stop6h 40m

Seattle/Tacoma Intl

Tue 3/2

17:50-23:55

Nonstop4h 05m

£140

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Wed 5/11

13:55-18:24

1 stop6h 29m

Seattle/Tacoma Intl

Sun 9/11

17:55-23:59

Nonstop4h 04m

£140

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Fri 7/11

07:37-10:15

Nonstop4h 38m

Seattle/Tacoma Intl

Sat 15/11

06:00-18:51

1 stop10h 51m

£140

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Fri 12/12

14:30-22:22

1 stop9h 52m

Seattle/Tacoma Intl

Mon 15/12

17:55-23:59

Nonstop4h 04m

£140

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Wed 12/11

07:20-12:56

1 stop7h 36m

Seattle/Tacoma Intl

Sun 16/11

17:55-23:59

Nonstop4h 04m

£140

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Fri 12/12

14:30-22:22

1 stop9h 52m

Seattle/Tacoma Intl

Sun 14/12

07:20-13:33

Nonstop4h 13m

£140

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Sun 23/11

06:00-08:37

Nonstop4h 37m

Seattle/Tacoma Intl

Fri 28/11

06:00-12:03

Nonstop4h 03m

£148

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Fri 30/1

13:55-18:32

1 stop6h 37m

Seattle/Tacoma Intl

Sat 31/1

13:30-21:55

1 stop6h 25m

£148

Flights are sorted by cheapest return flights first.

Deals found on 10/10

Showing 1-10 of 24 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 3 October 2025.

The best time to book flights from Chicago O'Hare Intl Airport to Seattle is 78 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, September is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to Seattle (average of £85). 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 10 October 2025.

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 54% 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 51 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 £137, United Airlines can have you in Seattle from Chicago O'Hare Intl Airport in 4h 41m. The distance from Chicago O'Hare Intl Airport to Seattle is about 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 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: KLM (100%), Delta (91%), Air France( 90%).

  • What are the cheapest flights from Chicago O'Hare Intl Airport to Seattle?

    Looking at all options, your cheapest flight can be booked for £98. While the most popular route (Chicago O'Hare Intl - Seattle/Tacoma Intl) can be booked for £145 on average, our data indicates £137 when flying from Chicago O'Hare Intl Airport to Seattle.

  • 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, September is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to Seattle (average of £85). 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?

Book flights to Seattle if you plan to visit one of these locations
Tacoma
Leavenworth
Bothell
SeaTac

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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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