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Cheap flights from Seattle to Chicago O'Hare Intl Airport from C$ 131

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 24/12. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — ORD
27 Nov — 4 Dec1
1 adult
1 adult, Economy, 0 bags

Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Chicago O'Hare Intl are usually found in January or September, booked 43 days in advance, depart on a Thursday or Friday and return on a Wednesday

Cheap flight deals from Seattle to O'Hare Intl

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to O'Hare Intl (ORD). 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 28 October 2025.

Round-trip from

C$ 253

One-way from

C$ 131

Popular in

December

Cheapest in

January

Average price

C$ 438

Good round-trip deal

C$ 272 or less

Good one-way deal

C$ 445 or less
Alaska Airlines
  • Alaska Airlines
  • 6/12-6/12
  • Nonstop
  • 8h 58m total
  • Seattle to Chicago
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United Airlines
  • United Airlines
  • 24/11
  • Nonstop
  • 3h 59m total
  • Seattle to Chicago
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Highest demand for flights based on searches. 5% potential increase in price (C$ 32 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease (C$ 16 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 round-trip flight from Seattle/Tacoma Intl to Chicago O'Hare Intl.
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Price to beat on a one-way flight from Seattle/Tacoma Intl to Chicago O'Hare Intl.
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Find flight deals from Seattle to O'Hare Intl

Enter your travel dates to find the best prices.

Cheapest flights from Seattle to O'Hare Intl
Explore the most affordable flight options available from Seattle to O'Hare Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 28 October 2025.

Wed 3/121:28 p.m.SEA - ORD
Nonstop4h 18mAmerican Airlines
Sat 6/128:34 p.m.ORD - SEA
Nonstop4h 51mAmerican Airlines
Deal found 28/10C$ 249
Sat 6/128:25 a.m.SEA - ORD
Nonstop4h 14mAlaska Airlines
Sat 6/125:51 p.m.ORD - SEA
Nonstop4h 44mAlaska Airlines
Deal found 28/10C$ 253
Mon 24/1110:53 a.m.SEA - ORD
Nonstop4h 03mUnited Airlines
Wed 3/121:25 p.m.ORD - SEA
Nonstop4h 42mUnited Airlines
Deal found 26/10C$ 255
Sat 6/125:50 p.m.SEA - ORD
Nonstop4h 09mAlaska Airlines
Tue 9/125:51 p.m.ORD - SEA
Nonstop4h 44mAlaska Airlines
Deal found 28/10C$ 262
Wed 31/125:49 p.m.SEA - ORD
Nonstop4h 10mAlaska Airlines
Mon 5/16:00 a.m.ORD - SEA
Nonstop4h 45mAlaska Airlines
Deal found 28/10C$ 269
Sat 6/125:50 p.m.SEA - ORD
Nonstop4h 09mAlaska Airlines
Mon 8/128:59 p.m.ORD - SEA
1 stop14h 34mAlaska Airlines
Deal found 28/10C$ 276
Wed 3/127:05 a.m.SEA - ORD
1 stop13h 30mSouthwest
Sat 6/123:05 p.m.ORD - SEA
1 stop8h 10mSouthwest
Deal found 28/10C$ 283
Thu 4/124:21 p.m.SEA - ORD
Nonstop4h 09mAlaska Airlines
Fri 12/123:05 p.m.ORD - SEA
1 stop11h 07mAlaska Airlines
Deal found 28/10C$ 290
Wed 3/129:56 a.m.SEA - ORD
1 stop7h 58mMultiple Airlines
Sat 6/125:51 p.m.ORD - SEA
Nonstop4h 44mMultiple Airlines
Deal found 28/10C$ 292
Wed 24/1211:15 p.m.SEA - ORD
1 stop12h 01mAlaska Airlines
Tue 20/12:06 p.m.ORD - SEA
1 stop6h 40mAlaska Airlines
Deal found 27/10C$ 302
Wed 17/122:08 p.m.SEA - ORD
1 stop7h 42mAlaska Airlines
Wed 7/18:00 a.m.ORD - SEA
Nonstop4h 46mAlaska Airlines
Deal found 27/10C$ 304
Wed 19/117:05 a.m.SEA - ORD
1 stop13h 30mSouthwest
Sun 23/111:00 p.m.ORD - SEA
1 stop13h 30mSouthwest
Deal found 27/10C$ 305

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle to O'Hare Intl 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 28 October 2025.
Use the filters below to find and compare flights from Seattle to Chicago O'Hare Intl Airport that are best for you.

Fly from

Seattle

Fly to

O'Hare Intl

Route

Depart

Return

Price

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Wed 10/12

12:18 a.m.-6:21 a.m.

Nonstop4h 03m

Chicago O'Hare Intl

Tue 16/12

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

Nonstop4h 44m

C$ 262

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Thu 20/11

6:15 p.m.-12:24 a.m.

Nonstop4h 09m

Chicago O'Hare Intl

Mon 24/11

6:00 a.m.-8:37 a.m.

Nonstop4h 37m

C$ 269

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Wed 18/2

11:00 p.m.-5:04 a.m.

Nonstop4h 04m

Chicago O'Hare Intl

Fri 27/2

2:59 p.m.-11:46 p.m.

1 stop10h 47m

C$ 276

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Sat 6/12

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

Nonstop4h 09m

Chicago O'Hare Intl

Fri 12/12

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

1 stop8h 38m

C$ 276

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Sun 1/2

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

Nonstop4h 08m

Chicago O'Hare Intl

Sun 1/2

3:49 p.m.-11:57 p.m.

1 stop10h 08m

C$ 281

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Tue 16/12

7:05 a.m.-10:35 p.m.

1 stop13h 30m

Chicago O'Hare Intl

Fri 9/1

4:25 p.m.-11:05 p.m.

1 stop8h 40m

C$ 283

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Wed 3/12

7:05 a.m.-10:35 p.m.

1 stop13h 30m

Chicago O'Hare Intl

Sat 6/12

3:05 p.m.-9:15 p.m.

1 stop8h 10m

C$ 283

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Tue 10/3

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

1 stop9h 45m

Chicago O'Hare Intl

Wed 11/3

6:50 p.m.-9:41 p.m.

Nonstop4h 51m

C$ 290

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Sat 13/12

1:05 p.m.-11:10 p.m.

1 stop8h 05m

Chicago O'Hare Intl

Sun 14/12

1:25 p.m.-4:07 p.m.

Nonstop4h 42m

C$ 290

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Thu 11/12

10:43 a.m.-4:55 p.m.

Nonstop4h 12m

Chicago O'Hare Intl

Wed 17/12

3:05 p.m.-12:12 a.m.

1 stop11h 07m

C$ 290

Flights are sorted by cheapest round-trip flights first.

Deals found on 27/10

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

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

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

Use this chart to determine the optimal time to book a round-trip flight from Seattle to O'Hare Intl. Price data was last updated on 24 October 2025.

Booking 43 days in advance of your planned departure date is, on average, the best time to get cheap flights from Seattle to Chicago O'Hare Intl Airport. 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 Seattle to Chicago O'Hare Intl Airport?

Currently, February is the cheapest month in which you can book a flight from Seattle to Chicago O'Hare Intl Airport (average of C$ 162). Flying from Seattle to Chicago O'Hare Intl Airport in May is currently the most expensive (average of C$ 236). 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 SEA to ORD?

Find hourly flight availability from Seattle to O'Hare Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 28 October 2025.

One of the essential ways to save on airfare from Seattle to Chicago O'Hare Intl Airport is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight in the afternoon could potentially save you up to 64% on airfare.

What is the cheapest day to fly from Seattle to Chicago O'Hare Intl Airport?

Use this chart to determine the cheapest time to fly round-trip from Seattle to O'Hare Intl. Price data was last updated on 26 October 2025.

Travelers seeking maximum savings on their Seattle to Chicago O'Hare Intl Airport flight should consider departing on Monday afternoons when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing O'Hare Intl

Get insights into the airlines that provide service to O'Hare Intl. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to O'Hare Intl. Reviews last updated 28 October 2025.
Check out reviews from past customers who have flown with Alaska Airlines from Seattle to Chicago O'Hare Intl Airport to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
11,203 reviews
Check prices

Crew

8.5

Food

7.1

Overall

8.0

Boarding

8.1

Comfort

7.8

Entertainment

7.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
Alaska Airlines
8.0
Very good
11,203 reviews
Alaska Airlines
8.0
Very good
11,203 reviews
Check prices

Crew

8.5

Food

7.1

Overall

8.0

Boarding

8.1

Comfort

7.8

Entertainment

7.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.

Related info for your journey

Find useful and relevant information for your journey from Seattle to O'Hare Intl. 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 from for flights from Seattle to Chicago O'Hare Intl?

    Seattle/Tacoma Intl (SEA), located 18.4 km from the city centre, is the airport you fly out of when you book flights from Seattle to Chicago O'Hare Intl. 1 airline have flights from Seattle/Tacoma Intl to Chicago O'Hare Intl on a regular basis. Booking flights from Seattle/Tacoma Intl to Chicago O'Hare Intl should not be difficult; the airport handles an average of 33 outbound flights to Chicago O'Hare Intl per day.

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

    United Airlines, Alaska Airlines, and Southwest can get you from Seattle to Chicago O'Hare Intl Airport in just under 4h 08m. Your travel time can differ by up to 9h 22m. Seattle and Chicago O'Hare Intl Airport are separated by a distance of 2760 km. This flight may include one or multiple stops.

  • What is the cheapest airline to fly from Seattle to Chicago O'Hare Intl Airport round-trip?

    Alaska Airlines, at C$ 216, was found to be the cheapest airline from Seattle to Chicago O'Hare Intl Airport.. Alaska Airlines is 50% cheaper than the average price of flights available within the next 90 days to this destination.

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

    The top 3 most reliable airlines when flying from Seattle to Chicago O'Hare Intl Airport are Austrian Airlines (96%), Avianca (95%) and WestJet (92%).

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

    Looking at all options, your cheapest flight can be booked for C$ 216. While the most popular route (Seattle/Tacoma Intl - Chicago O'Hare Intl) can be booked for C$ 469 on average, our data indicates C$ 525 when flying from Seattle to Chicago O'Hare Intl Airport.

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

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

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

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

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

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

    Currently, February is the cheapest month in which you can book a flight from Seattle to Chicago O'Hare Intl Airport (average of C$ 162). Flying from Seattle to Chicago O'Hare Intl Airport in May is currently the most expensive (average of C$ 236). 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 Chicago O'Hare Intl Airport?

Book flights to Chicago O'Hare Intl Airport if you plan to visit one of these locations
Evanston
Des Plaines
Elk Grove Village
Skokie
Downers Grove
Naperville
Bolingbrook
Romeoville

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Top airline flying from Seattle to O'Hare Intl

Discover the top airline that operate flights from Seattle to O'Hare Intl. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 28 October 2025.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapestC$ 216AverageC$ 367FlexibilityNo cancel feeOn-time75%
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Fly with Cheapflights

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How does Cheapflights help users find flights from Seattle to O'Hare Intl?

Cheapflights makes it easy to find Seattle to O'Hare Intl flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

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

Cheapflights simply makes it quick and affordable to book flights from Seattle to O'Hare Intl by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

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

Certainly. Search results for flights to O'Hare Intl from Seattle 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 Seattle to O'Hare Intl become cheaper?

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

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