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Cheap flights from Chicago O'Hare Intl Airport to Seattle from C$ 126

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 9/3. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — SEA
26 Nov — 3 Dec1
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 Tuesday or Wednesday and return on a Thursday

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 27 October 2025.

Round-trip from

C$ 248

One-way from

C$ 126

Popular in

December

Cheapest in

September

Average price

C$ 360

Good one-way deal

C$ 146 or less
Alaska Airlines
  • Alaska Airlines
  • 11/2-16/2
  • Nonstop
  • 8h 50m total
  • Chicago to Seattle
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Delta
  • Delta
  • 10/3
  • Nonstop
  • 4h 45m total
  • Chicago to Seattle
Search Deals
Highest demand for flights based on searches. 7% potential increase in price (C$ 45 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease (C$ 14 potential savings vs. average RT 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 27 October 2025.

Tue 9/125:51 p.m.ORD - SEA
Nonstop4h 44mAlaska Airlines
Sat 13/1212:18 a.m.SEA - ORD
Nonstop4h 03mAlaska Airlines
Deal found 24/10C$ 248
Sat 6/1210:00 a.m.ORD - SEA
Nonstop4h 42mAlaska Airlines
Sat 6/124:21 p.m.SEA - ORD
Nonstop4h 09mAlaska Airlines
Deal found 27/10C$ 253
Mon 17/117:10 a.m.ORD - SEA
Nonstop4h 40mUnited Airlines
Mon 24/1111:30 p.m.SEA - ORD
Nonstop3h 59mUnited Airlines
Deal found 25/10C$ 255
Sat 6/123:35 p.m.ORD - SEA
Nonstop4h 47mAlaska Airlines
Mon 8/125:50 p.m.SEA - ORD
Nonstop4h 09mAlaska Airlines
Deal found 27/10C$ 262
Wed 10/123:05 p.m.ORD - SEA
1 stop8h 38mAlaska Airlines
Wed 10/1212:18 a.m.SEA - ORD
Nonstop4h 03mAlaska Airlines
Deal found 24/10C$ 267
Mon 24/117:10 a.m.ORD - SEA
Nonstop4h 40mUnited Airlines
Fri 28/117:00 a.m.SEA - ORD
Nonstop4h 09mUnited Airlines
Deal found 27/10C$ 269
Fri 5/124:25 p.m.ORD - SEA
1 stop8h 30mSouthwest
Sat 6/1212:10 p.m.SEA - ORD
1 stop8h 25mSouthwest
Deal found 26/10C$ 274
Fri 5/123:35 p.m.ORD - SEA
Nonstop4h 47mAlaska Airlines
Tue 9/125:50 p.m.SEA - ORD
Nonstop4h 09mAlaska Airlines
Deal found 27/10C$ 276
Fri 5/124:25 p.m.ORD - SEA
1 stop8h 30mSouthwest
Sun 7/127:25 a.m.SEA - ORD
1 stop13h 10mSouthwest
Deal found 26/10C$ 283
Mon 15/128:59 p.m.ORD - SEA
1 stop14h 34mAlaska Airlines
Mon 19/17:50 p.m.SEA - ORD
1 stop15h 20mAlaska Airlines
Deal found 27/10C$ 288
Wed 3/123:05 p.m.ORD - SEA
1 stop8h 38mAlaska Airlines
Mon 8/1210:43 a.m.SEA - ORD
Nonstop4h 12mAlaska Airlines
Deal found 27/10C$ 290
Wed 26/117:10 a.m.ORD - SEA
Nonstop4h 40mUnited Airlines
Wed 3/127:00 a.m.SEA - ORD
Nonstop4h 09mUnited Airlines
Deal found 26/10C$ 298

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 27 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

Thu 22/1

2:20 p.m.-5:00 p.m.

Nonstop4h 40m

Seattle/Tacoma Intl

Sun 25/1

7:10 a.m.-1:22 p.m.

Nonstop4h 12m

C$ 248

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Sun 15/2

7:45 a.m.-10:36 a.m.

Nonstop4h 51m

Seattle/Tacoma Intl

Sat 21/2

11:45 a.m.-5:50 p.m.

Nonstop4h 05m

C$ 248

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Sun 15/2

10:00 a.m.-12:50 p.m.

Nonstop4h 50m

Seattle/Tacoma Intl

Wed 18/2

6:00 p.m.-11:59 p.m.

Nonstop3h 59m

C$ 248

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Thu 19/2

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

Nonstop4h 45m

Seattle/Tacoma Intl

Sun 22/2

5:45 p.m.-11:44 p.m.

Nonstop3h 59m

C$ 248

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Tue 17/2

7:45 a.m.-10:36 a.m.

Nonstop4h 51m

Seattle/Tacoma Intl

Wed 18/2

9:30 p.m.-1:04 p.m.

1 stop13h 34m

C$ 262

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Sat 6/12

5:51 p.m.-8:35 p.m.

Nonstop4h 44m

Seattle/Tacoma Intl

Fri 2/1

12:25 a.m.-6:29 a.m.

Nonstop4h 04m

C$ 262

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Sun 18/1

2:06 p.m.-6:46 p.m.

1 stop6h 40m

Seattle/Tacoma Intl

Tue 27/1

8:30 a.m.-2:38 p.m.

Nonstop4h 08m

C$ 262

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Mon 16/2

7:45 a.m.-10:36 a.m.

Nonstop4h 51m

Seattle/Tacoma Intl

Tue 17/2

11:25 a.m.-11:10 p.m.

1 stop9h 45m

C$ 269

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Wed 4/2

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

Nonstop4h 46m

Seattle/Tacoma Intl

Tue 10/2

12:41 p.m.-11:37 p.m.

1 stop8h 56m

C$ 276

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Wed 3/12

3:05 p.m.-9:43 p.m.

1 stop8h 38m

Seattle/Tacoma Intl

Sat 6/12

4:21 p.m.-10:30 p.m.

Nonstop4h 09m

C$ 276

Flights are sorted by cheapest round-trip flights first.

Deals found on 26/10

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 24 October 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$ 158). Flying from Chicago O'Hare Intl Airport to Seattle in December is currently the most expensive (average of C$ 248). 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 27 October 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 30 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 Delta or Alaska 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 cheapest airlines to fly from Chicago O'Hare Intl Airport to Seattle one-way?

    C$ 132 is the cheapest one-way deal found within the past few days, from Alaska Airlines. You may also be able to find cheap deals on United Airlines and Southwest, with prices starting from C$ 132 and C$ 137, respectively.

  • 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 Air France (92%), Delta (87%) and Korean Air (81%).

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

    On average you can expect to pay C$ 174 for a flight from Chicago O'Hare Intl Airport to Seattle. The cheapest flight overall is C$ 134 while the most popular route, (Chicago O'Hare Intl - Seattle/Tacoma Intl) is currently priced at C$ 390.

  • 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$ 158). Flying from Chicago O'Hare Intl Airport to Seattle in December is currently the most expensive (average of C$ 248). 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
Leavenworth
SeaTac
Tukwila
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Bothell
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