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Cheap flights from Seattle to Chicago O'Hare Intl Airport from C$ 137

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 3/9. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — ORD
3 Aug — 10 Aug1
1 adult

Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Chicago O'Hare Intl are usually found in September or October, booked 65 days in advance, depart on a Thursday or Wednesday and return on a Tuesday

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 29 July 2025.

Round-trip from

C$ 246

One-way from

C$ 137

Popular in

December

Cheapest in

September

Average price

C$ 471

Good round-trip deal

C$ 388 or less

Good one-way deal

C$ 354 or less
Delta
  • Delta
  • 30/8-31/8
  • Nonstop
  • 8h 31m total
  • Seattle to Chicago
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United Airlines
  • United Airlines
  • 3/9
  • 1 total stop
  • 8h 25m 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$ 16 potential savings vs. average RT price).
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Average for round-trip flights in July 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 29 July 2025.

Sat 30/85:50 p.m.SEA - ORD
Nonstop4h 01mDelta
Sun 31/87:15 a.m.ORD - SEA
Nonstop4h 30mDelta
Deal found 27/7C$ 246
Mon 25/812:59 a.m.SEA - ORD
Nonstop4h 04mAlaska Airlines
Tue 26/810:00 a.m.ORD - SEA
Nonstop4h 34mAlaska Airlines
Deal found 28/7C$ 251
Mon 25/812:59 a.m.SEA - ORD
Nonstop4h 04mHawaiian Airlines
Sat 30/86:20 a.m.ORD - SEA
Nonstop4h 30mHawaiian Airlines
Deal found 29/7C$ 252
Tue 26/87:34 p.m.SEA - ORD
1 stop7h 49mUnited Airlines
Tue 2/97:10 a.m.ORD - SEA
Nonstop4h 33mUnited Airlines
Deal found 29/7C$ 278
Wed 20/81:40 p.m.SEA - ORD
1 stop8h 00mSouthwest
Sun 24/86:55 p.m.ORD - SEA
1 stop7h 25mSouthwest
Deal found 29/7C$ 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 29 July 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

Sat 30/8

5:50 p.m.-11:51 p.m.

Nonstop4h 01m

Chicago O'Hare Intl

Sun 31/8

7:15 a.m.-9:45 a.m.

Nonstop4h 30m

C$ 246

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Mon 25/8

12:59 a.m.-7:03 a.m.

Nonstop4h 04m

Chicago O'Hare Intl

Tue 26/8

10:00 a.m.-12:34 p.m.

Nonstop4h 34m

C$ 251

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Mon 25/8

12:59 a.m.-7:03 a.m.

Nonstop4h 04m

Chicago O'Hare Intl

Sat 30/8

6:20 a.m.-8:50 a.m.

Nonstop4h 30m

C$ 252

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Tue 2/9

11:54 p.m.-5:55 a.m.

Nonstop4h 01m

Chicago O'Hare Intl

Sat 6/9

7:35 p.m.-10:20 p.m.

Nonstop4h 45m

C$ 259

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Wed 20/8

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

1 stop8h 00m

Chicago O'Hare Intl

Sun 24/8

6:55 p.m.-12:20 a.m.

1 stop7h 25m

C$ 305

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Wed 3/9

8:00 a.m.-6:25 p.m.

1 stop8h 25m

C$ 137

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Wed 22/10

7:52 a.m.-6:59 p.m.

1 stop9h 07m

C$ 143

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Wed 10/9

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

1 stop13h 20m

C$ 151

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Wed 6/8

5:30 p.m.-6:03 a.m.

1 stop10h 33m

C$ 158

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Mon 1/9

12:59 a.m.-7:03 a.m.

Nonstop4h 04m

C$ 163

Flights are sorted by cheapest round-trip flights first.

Deals found on 28/7

Showing 1-10 of 13 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 25 July 2025.

Booking 65 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$ 352). 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 29 July 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 evening tend to be the most expensive. A flight in the afternoon could potentially save you up to 67% 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 27 July 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.

Weekly flight availability from Seattle to Chicago O'Hare Intl Airport

Explore weekly flight availability from Seattle to O'Hare Intl. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 29 July 2025.

The most flights from SEA to ORD are scheduled on a Tuesday (77 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (32 on average).

How much does it cost to fly round-trip from Seattle to Chicago O'Hare Intl Airport?

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 29 July 2025.
Check out reviews from past customers who have flown with Alaska Airlines,Southwest, andDelta 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

Food

7.1

Comfort

7.8

Overall

8.0

Crew

8.5

Boarding

8.1

Entertainment

7.1

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

Food

7.1

Comfort

7.8

Overall

8.0

Crew

8.5

Boarding

8.1

Entertainment

7.1

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.
Southwest
8.0
Very good
4,238 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Food

7.1

Comfort

7.8

Overall

8.0

Crew

8.5

Boarding

8.1

Entertainment

7.1

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.
Delta
8.0
Very good
7,979 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Food

7.1

Comfort

7.8

Overall

8.0

Crew

8.5

Boarding

8.1

Entertainment

7.1

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.
Hawaiian Airlines
7.8
Good
2,605 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Food

7.1

Comfort

7.8

Overall

8.0

Crew

8.5

Boarding

8.1

Entertainment

7.1

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.
United Airlines
7.4
Good
8,896 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Food

7.1

Comfort

7.8

Overall

8.0

Crew

8.5

Boarding

8.1

Entertainment

7.1

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

  • What are the cheapest airlines flying from Seattle to Chicago O'Hare Intl Airport round-trip?

    Delta, at C$ 246, was found to be the cheapest airline from Seattle to Chicago O'Hare Intl Airport.Alternate airlines to your destination round-trip include Alaska Airlines and Hawaiian Airlines. Delta is 41% 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$ 137 on United Airlines. Other airlines that offer cheap prices include Hawaiian Airlines from C$ 143 and Southwest from C$ 151 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 Air France (100%), Austrian Airlines (91%) and Korean Air (85%).

  • 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$ 259. While the most popular route (Seattle/Tacoma Intl - Chicago O'Hare Intl) can be booked for C$ 340 on average our data indicates C$ 668 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$ 352). 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
Elk Grove Village
Evanston
Des Plaines
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 29 July 2025.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapestC$ 213AverageC$ 346FlexibilityNo 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?

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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