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Cheap flights from Seattle to Chicago O'Hare Intl Airport from C$ 130

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 4/12. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — ORD
11 Oct — 18 Oct1
1 adult
1 adult, Economy

Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Chicago O'Hare Intl are usually found in September or January, booked 62 days in advance, depart on a Thursday or Friday and return on a Thursday

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 11 September 2025.

Round-trip from

C$ 263

One-way from

C$ 130

Popular in

December

Cheapest in

September

Average price

C$ 345

Good round-trip deal

C$ 578 or less

Good one-way deal

C$ 684 or less
United Airlines
  • United Airlines
  • 7/11-11/11
  • 1 total stop
  • 12h 05m total
  • Seattle to Chicago
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Delta
  • Delta
  • 4/12
  • 1 total stop
  • 7h 58m total
  • Seattle to Chicago
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Highest demand for flights based on searches. 6% potential increase in price (C$ 37 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease (C$ 17 potential savings vs. average RT price).
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Average for round-trip flights in September 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

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 11 September 2025.

Fri 7/113:37 p.m.SEA - ORD
1 stop7h 22mUnited Airlines
Tue 11/118:02 p.m.ORD - SEA
Nonstop4h 43mUnited Airlines
Deal found 10/9C$ 263
Tue 30/912:43 p.m.SEA - ORD
1 stop7h 56mUnited Airlines
Sat 4/107:47 p.m.ORD - SEA
Nonstop4h 43mUnited Airlines
Deal found 9/9C$ 265
Thu 27/1110:53 a.m.SEA - ORD
Nonstop4h 13mAlaska Airlines
Wed 3/123:05 p.m.ORD - SEA
1 stop8h 38mAlaska Airlines
Deal found 11/9C$ 266
Sat 15/113:31 p.m.SEA - ORD
Nonstop4h 09mHawaiian Airlines
Sat 22/116:00 a.m.ORD - SEA
Nonstop4h 37mHawaiian Airlines
Deal found 11/9C$ 267
Fri 26/97:10 a.m.SEA - ORD
Nonstop4h 10mDelta
Wed 1/107:10 a.m.ORD - SEA
Nonstop4h 35mDelta
Deal found 9/9C$ 269
Sun 23/1112:25 a.m.SEA - ORD
Nonstop4h 03mAlaska Airlines
Thu 4/123:05 p.m.ORD - SEA
1 stop8h 38mAlaska Airlines
Deal found 11/9C$ 270
Tue 7/101:30 p.m.SEA - ORD
1 stop6h 13mDelta
Tue 14/107:37 a.m.ORD - SEA
Nonstop4h 38mDelta
Deal found 9/9C$ 273
Tue 30/96:00 a.m.SEA - ORD
1 stop8h 47mDelta
Sun 5/107:10 a.m.ORD - SEA
Nonstop4h 35mDelta
Deal found 9/9C$ 274
Thu 2/108:30 a.m.SEA - ORD
1 stop7h 55mUnited Airlines
Mon 6/107:10 a.m.ORD - SEA
Nonstop4h 33mUnited Airlines
Deal found 10/9C$ 276
Wed 17/128:25 a.m.SEA - ORD
Nonstop4h 14mAlaska Airlines
Mon 5/16:00 a.m.ORD - SEA
Nonstop4h 45mAlaska Airlines
Deal found 10/9C$ 277
Sat 4/105:50 p.m.SEA - ORD
Nonstop4h 09mAlaska Airlines
Mon 6/103:50 p.m.ORD - SEA
1 stop9h 16mAlaska Airlines
Deal found 10/9C$ 279
Sun 16/1112:20 a.m.SEA - ORD
Nonstop4h 02mHawaiian Airlines
Sat 22/116:02 p.m.ORD - SEA
Nonstop4h 53mHawaiian Airlines
Deal found 9/9C$ 280

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 11 September 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

Fri 9/1

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

Nonstop3h 59m

Chicago O'Hare Intl

Sun 18/1

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

Nonstop4h 51m

C$ 265

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Thu 27/11

10:53 a.m.-5:06 p.m.

Nonstop4h 13m

Chicago O'Hare Intl

Thu 4/12

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

1 stop8h 38m

C$ 266

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Thu 4/12

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

Nonstop4h 03m

Chicago O'Hare Intl

Tue 9/12

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

1 stop8h 38m

C$ 279

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Wed 10/12

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

Nonstop4h 03m

Chicago O'Hare Intl

Sun 14/12

7:59 p.m.-9:33 a.m.

1 stop15h 34m

C$ 279

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Tue 10/3

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

Nonstop4h 04m

Chicago O'Hare Intl

Wed 11/3

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

Nonstop4h 51m

C$ 281

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Tue 10/3

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

Nonstop4h 04m

Chicago O'Hare Intl

Wed 11/3

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

Nonstop4h 51m

C$ 283

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Sat 10/1

7:30 a.m.-9:56 p.m.

2 stops12h 26m

Chicago O'Hare Intl

Tue 20/1

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

Nonstop4h 45m

C$ 284

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Sat 6/12

2:08 p.m.-11:50 p.m.

1 stop7h 42m

Chicago O'Hare Intl

Wed 10/12

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

1 stop8h 38m

C$ 291

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Sat 27/9

11:15 a.m.-5:20 p.m.

Nonstop4h 05m

Chicago O'Hare Intl

Sat 4/10

2:25 p.m.-10:16 p.m.

1 stop9h 51m

C$ 295

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Thu 26/2

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

Nonstop3h 59m

Chicago O'Hare Intl

Mon 2/3

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

Nonstop4h 45m

C$ 301

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/9

Showing 1-10 of 22 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 29 August 2025.

Booking 62 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, January is the cheapest month in which you can book a flight from Seattle to Chicago O'Hare Intl Airport (average of C$ 261). Flying from Seattle to Chicago O'Hare Intl Airport in March is currently the most expensive (average of C$ 349). 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 11 September 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 7 September 2025.

Travelers seeking maximum savings on their Seattle to Chicago O'Hare Intl Airport flight should consider departing on Sunday afternoons when fares are most often at their lowest. Saturday evenings 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 11 September 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
10,000 reviews
Check prices

Entertainment

7.0

Food

7.1

Overall

8.0

Comfort

7.8

Crew

8.5

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Entertainment

7.0

Food

7.1

Overall

8.0

Comfort

7.8

Crew

8.5

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.

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 57 outbound flights to Chicago O'Hare Intl per day.

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

    Alaska Airlines and Hawaiian Airlines can get you from Seattle to Chicago O'Hare Intl Airport in just under 3h 59m. Your travel time will be generally consistent. Seattle and Chicago O'Hare Intl Airport are separated by a distance of 2760 km. All flights are typically direct.

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

    Alaska Airlines, at C$ 261, was found to be the cheapest airline from Seattle to Chicago O'Hare Intl Airport.. Alaska Airlines is 38% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the cheapest airlines to fly from Seattle to Chicago O'Hare Intl Airport one-way?

    One-way options have recently been found by users for as low as C$ 133 on Alaska Airlines. Other airlines that offer cheap prices include Delta from C$ 137 and United Airlines from C$ 137 one-way.

  • 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 WestJet (100%), KLM (100%) and Avianca (90%).

  • 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$ 238. While the most popular route (Seattle/Tacoma Intl - Chicago O'Hare Intl) can be booked for C$ 355 on average, our data indicates C$ 799 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, January is the cheapest month in which you can book a flight from Seattle to Chicago O'Hare Intl Airport (average of C$ 261). Flying from Seattle to Chicago O'Hare Intl Airport in March is currently the most expensive (average of C$ 349). 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 11 September 2025.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapestC$ 261AverageC$ 371FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights

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?

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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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