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Cheap flights from Chicago O'Hare Intl Airport to Seattle from C$ 135

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 31/1. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — SEA
11 Jan — 18 Jan1
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 September or February, booked 78 days in advance, depart on a Saturday or Wednesday and return on a Thursday

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 12 December 2025.

Thu 18/127:50 a.m.ORD - SEA
Nonstop4h 51mDelta
Wed 31/125:55 p.m.SEA - ORD
Nonstop4h 04mDelta
Deal found 10/12C$ 437
Fri 19/125:49 a.m.ORD - SEA
1 stop8h 58mUnited Airlines
Sat 10/17:00 a.m.SEA - ORD
Nonstop4h 08mUnited Airlines
Deal found 10/12C$ 445
Thu 18/126:45 a.m.ORD - SEA
1 stop10h 00mDelta
Mon 5/17:10 a.m.SEA - ORD
Nonstop4h 12mDelta
Deal found 10/12C$ 465
Tue 23/127:55 p.m.ORD - SEA
Nonstop4h 52mUnited Airlines
Thu 25/1211:59 p.m.SEA - ORD
Nonstop4h 10mUnited Airlines
Deal found 11/12C$ 470
Mon 22/123:37 p.m.ORD - SEA
1 stop11h 04mAlaska Airlines
Wed 31/125:49 p.m.SEA - ORD
Nonstop4h 10mAlaska Airlines
Deal found 10/12C$ 479
Sun 21/126:25 p.m.ORD - SEA
1 stop8h 34mUnited Airlines
Thu 25/1211:59 p.m.SEA - ORD
Nonstop4h 10mUnited Airlines
Deal found 10/12C$ 481
Wed 17/122:05 p.m.ORD - SEA
1 stop8h 44mAlaska Airlines
Thu 25/124:59 p.m.SEA - ORD
1 stop10h 03mAlaska Airlines
Deal found 9/12C$ 505
Thu 18/1212:45 p.m.ORD - SEA
1 stop7h 21mUnited Airlines
Thu 25/125:02 a.m.SEA - ORD
1 stop6h 17mUnited Airlines
Deal found 10/12C$ 506
Wed 17/128:00 a.m.ORD - SEA
Nonstop4h 52mAlaska Airlines
Thu 25/1212:25 a.m.SEA - ORD
Nonstop4h 04mAlaska Airlines
Deal found 10/12C$ 520

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 12 December 2025.

Round-trip from

C$ 244

One-way from

C$ 135

Popular in

June

Cheapest in

September

Average price

C$ 445

Good round-trip deal

C$ 275 or less

Good one-way deal

C$ 205 or less
Alaska Airlines
  • Alaska Airlines
  • 12/2-15/2
  • Nonstop
  • 8h 48m total
  • Chicago to Seattle
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Southwest
  • Southwest
  • 31/1
  • 1 total stop
  • 9h 20m total
  • Chicago to Seattle
Search Deals
Highest demand for flights based on searches. 7% potential increase in price (C$ 43 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 8 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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Price to beat on a round-trip flight from Chicago O'Hare Intl to Seattle/Tacoma Intl.
Search Deals
Price to beat on a one-way flight from Chicago O'Hare Intl to Seattle/Tacoma Intl.
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Cheapflights Fare Finder

 
Customize 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 629,999 searches. Data last updated 12 December 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

7:54 p.m.-10:43 p.m.

Nonstop4h 49m

Seattle/Tacoma Intl

Sat 10/1

7:00 a.m.-1:08 p.m.

Nonstop4h 08m

C$ 244

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Sat 14/2

5:29 p.m.-8:16 p.m.

Nonstop4h 47m

Seattle/Tacoma Intl

Wed 18/2

10:22 a.m.-4:33 p.m.

Nonstop4h 11m

C$ 244

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Fri 30/1

1:20 p.m.-4:01 p.m.

Nonstop4h 41m

Seattle/Tacoma Intl

Fri 6/2

2:10 p.m.-8:17 p.m.

Nonstop4h 07m

C$ 244

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Fri 16/1

1:20 p.m.-4:01 p.m.

Nonstop4h 41m

Seattle/Tacoma Intl

Mon 19/1

7:00 a.m.-1:08 p.m.

Nonstop4h 08m

C$ 244

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Tue 10/2

8:00 a.m.-10:46 a.m.

Nonstop4h 46m

Seattle/Tacoma Intl

Sun 15/2

9:40 p.m.-1:11 p.m.

1 stop13h 31m

C$ 258

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Wed 4/3

3:54 p.m.-6:40 p.m.

Nonstop4h 46m

Seattle/Tacoma Intl

Sat 7/3

9:40 p.m.-12:11 p.m.

1 stop12h 31m

C$ 258

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Wed 18/3

7:20 a.m.-10:00 a.m.

Nonstop4h 40m

Seattle/Tacoma Intl

Wed 25/3

5:57 p.m.-11:54 p.m.

Nonstop3h 57m

C$ 272

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Tue 6/1

7:30 a.m.-10:15 a.m.

Nonstop4h 45m

Seattle/Tacoma Intl

Mon 19/1

5:55 p.m.-11:53 p.m.

Nonstop3h 58m

C$ 272

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Sat 24/1

9:00 a.m.-5:29 p.m.

1 stop10h 29m

Seattle/Tacoma Intl

Sat 31/1

7:50 p.m.-1:10 p.m.

1 stop15h 20m

C$ 284

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Thu 12/3

7:20 a.m.-9:58 a.m.

Nonstop4h 38m

Seattle/Tacoma Intl

Tue 17/3

11:12 p.m.-8:57 a.m.

1 stop7h 45m

C$ 285

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/12

Showing 1-10 of 23 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 round-trip 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 round-trip flight from O'Hare Intl to Seattle. Price data was last updated on 5 December 2025.

The price you pay for your flight from Chicago O'Hare Intl Airport to Seattle may vary depending on when you book. For the best chance of a lower fare, look to book 78 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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 C$ 156). Flying from Chicago O'Hare Intl Airport to Seattle in December is currently the most expensive (average of C$ 247). 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 12 December 2025.

It’s typically best to fly out from Chicago O'Hare Intl Airport to Seattle at noon. Doing so could potentially save you 28% on the flight price compared to flying in the afternoon, which is usually more expensive.

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?

    Located just 18.4 km from the city centre, Seattle/Tacoma Intl is the airport most travellers will use when flying to Seattle from Chicago O'Hare Intl. Booking flights from Chicago O'Hare Intl to Seattle/Tacoma Intl (SEA) should be relatively easy as there are 33 daily inbound flights from Chicago O'Hare Intl from 0 different airlines.

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

    There are many flights that can get you from Chicago O'Hare Intl Airport to Seattle in 4h 45m. Fly via Alaska Airlines or United Airlines to get the fastest option. The distance from Chicago O'Hare Intl Airport to Seattle is about 2760 km. Most flights are nonstop.

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

    The top 3 most reliable airlines when flying from Chicago O'Hare Intl Airport to Seattle are Aer Lingus (81%), Malaysia Airlines (79%) and American Airlines (77%).

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

    On average you can expect to pay C$ 353 for a flight from Chicago O'Hare Intl Airport to Seattle. The cheapest flight overall is C$ 122 while the most popular route, (Chicago O'Hare Intl - Seattle/Tacoma Intl) is currently priced at C$ 687.

  • 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 vacation 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 C$ 156). Flying from Chicago O'Hare Intl Airport to Seattle in December is currently the most expensive (average of C$ 247). 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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Leavenworth
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