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Cheap flights from Seattle to Chicago 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 7/1. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — CHI
6 Nov — 13 Nov1
1 adult
1 adult, Economy

Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Chicago are usually found in January or February, booked 84 days in advance, depart on a Thursday or Friday and return on a Tuesday

Cheap flight deals from Seattle to Chicago

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Chicago (CHI). 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 7 October 2025.

Round-trip from

C$ 273

One-way from

C$ 131

Popular in

December

Cheapest in

January

Average price

C$ 409

Good round-trip deal

C$ 371 or less

Good one-way deal

C$ 139 or less
Southwest
  • Southwest
  • 8/1-20/1
  • 2 total stops
  • 15h 55m total
  • Seattle to Chicago
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United Airlines
  • United Airlines
  • 7/1
  • 1 total stop
  • 8h 39m 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$ 18 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 (CHI).
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Price to beat on a one-way flight from Seattle/Tacoma Intl to Chicago (CHI).
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Find flight deals from Seattle to Chicago

Enter your travel dates to find the best prices.

Cheapest flights from Seattle to Chicago
Explore the most affordable flight options available from Seattle to Chicago. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 7 October 2025.

Wed 12/1111:55 p.m.SEA - ORD
1 stop6h 35mDelta
Wed 19/117:20 a.m.ORD - SEA
1 stop7h 36mDelta
Deal found 6/10C$ 275
Mon 8/127:05 a.m.SEA - ORD
1 stop13h 30mSouthwest
Fri 12/124:25 p.m.ORD - SEA
1 stop9h 40mSouthwest
Deal found 6/10C$ 282
Sat 22/115:55 p.m.SEA - ORD
Nonstop4h 04mDelta
Mon 8/127:50 a.m.ORD - SEA
Nonstop4h 51mDelta
Deal found 5/10C$ 285
Fri 31/1012:56 p.m.SEA - ORD
1 stop14h 05mAlaska Airlines
Mon 3/116:00 a.m.ORD - SEA
Nonstop4h 40mAlaska Airlines
Deal found 7/10C$ 289
Wed 24/126:00 a.m.SEA - ORD
Nonstop4h 13mAlaska Airlines
Tue 20/13:35 p.m.ORD - SEA
Nonstop4h 47mAlaska Airlines
Deal found 6/10C$ 297
Sat 22/115:55 p.m.SEA - ORD
Nonstop4h 04mDelta
Wed 10/128:50 a.m.ORD - SEA
1 stop6h 08mDelta
Deal found 5/10C$ 299
Sun 2/117:40 p.m.SEA - ORD
1 stop7h 21mAlaska Airlines
Sun 9/117:00 a.m.ORD - SEA
1 stop9h 43mAlaska Airlines
Deal found 7/10C$ 301
Sun 23/115:49 p.m.SEA - ORD
Nonstop4h 10mAlaska Airlines
Fri 28/116:00 a.m.ORD - SEA
Nonstop4h 37mAlaska Airlines
Deal found 7/10C$ 303
Sat 1/1112:10 p.m.SEA - ORD
1 stop9h 30mSouthwest
Tue 4/112:15 p.m.ORD - SEA
2 stops10h 40mSouthwest
Deal found 7/10C$ 310
Wed 19/115:20 a.m.SEA - ORD
1 stop5h 49mAlaska Airlines
Wed 26/113:31 p.m.ORD - SEA
Nonstop4h 44mAlaska Airlines
Deal found 7/10C$ 311
Sat 1/117:40 p.m.SEA - ORD
1 stop8h 20mAlaska Airlines
Wed 12/119:20 a.m.ORD - SEA
1 stop11h 33mAlaska Airlines
Deal found 7/10C$ 315
Sun 23/115:49 p.m.SEA - ORD
Nonstop4h 10mAlaska Airlines
Thu 4/128:55 a.m.ORD - SEA
1 stop10h 32mAlaska Airlines
Deal found 7/10C$ 317

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle to Chicago 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 7 October 2025.
Use the filters below to find and compare flights from Seattle to Chicago that are best for you.

Fly from

Seattle

Fly to

Chicago

Route

Depart

Return

Price

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Sat 10/1

1:30 p.m.-9:55 p.m.

1 stop6h 25m

Chicago O'Hare Intl

Tue 20/1

9:30 a.m.-4:19 p.m.

1 stop8h 49m

C$ 275

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Sat 6/12

1:40 p.m.-9:21 p.m.

1 stop5h 41m

Chicago O'Hare Intl

Wed 10/12

10:45 a.m.-6:32 p.m.

1 stop9h 47m

C$ 275

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Tue 6/1

1:45 p.m.-11:54 p.m.

1 stop8h 09m

Chicago O'Hare Intl

Wed 21/1

7:15 a.m.-12:26 p.m.

1 stop7h 11m

C$ 275

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Fri 5/12

11:00 p.m.-8:34 a.m.

1 stop7h 34m

Chicago O'Hare Intl

Mon 15/12

1:35 p.m.-6:36 p.m.

1 stop7h 01m

C$ 275

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Wed 12/11

6:00 a.m.-3:02 p.m.

1 stop7h 02m

Chicago O'Hare Intl

Sat 15/11

5:29 p.m.-11:20 p.m.

1 stop7h 51m

C$ 275

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Tue 2/12

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

Nonstop4h 00m

Chicago O'Hare Intl

Sun 7/12

6:10 p.m.-8:50 p.m.

Nonstop4h 40m

C$ 285

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Sat 22/11

5:55 p.m.-11:59 p.m.

Nonstop4h 04m

Chicago O'Hare Intl

Fri 5/12

6:10 p.m.-8:50 p.m.

Nonstop4h 40m

C$ 285

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Tue 3/3

7:00 a.m.-1:04 p.m.

Nonstop4h 04m

Chicago O'Hare Intl

Tue 10/3

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

1 stop10h 47m

C$ 289

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

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

Nonstop4h 51m

C$ 289

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Wed 24/12

10:55 a.m.-5:12 p.m.

Nonstop4h 17m

Chicago O'Hare Intl

Wed 21/1

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

Nonstop4h 46m

C$ 297

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Showing 1-10 of 23 results
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Best time to book a flight from Seattle to Chicago

Have a flexible travel schedule? Discover the best time to fly to Chicago 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

How far ahead should I book a flight from Seattle to Chicago?

Use this chart to determine the optimal time to book a round-trip flight from Seattle to Chicago. Price data was last updated on 3 October 2025.

To ensure you get the cheapest price possible for a flight from Seattle to Chicago, you should look to book at least 84 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from Seattle to Chicago?

Currently, February is the cheapest month in which you can book a flight from Seattle to Chicago (average of C$ 160). Flying from Seattle to Chicago in July 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 CHI?

Find hourly flight availability from Seattle to Chicago. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 7 October 2025.

It’s typically best to fly out from Seattle to Chicago in the afternoon. Doing so could potentially save you 54% on the flight price compared to flying in the morning, which is usually more expensive.

What is the cheapest day to fly from Seattle to Chicago?

Use this chart to determine the cheapest time to fly round-trip from Seattle to Chicago. Price data was last updated on 5 October 2025.

Travelers seeking maximum savings on their Seattle to Chicago flight should consider departing on Monday evenings 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.

Weekly flight availability from Seattle to Chicago

Explore weekly flight availability from Seattle to Chicago. 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 7 October 2025.

The most flights from SEA to CHI are scheduled on a Monday (60 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (40 on average).

How much does it cost to fly round-trip from Seattle to Chicago?

Reviews of airlines servicing Chicago

Get insights into the airlines that provide service to Chicago. 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 Chicago. Reviews last updated 7 October 2025.
See what other customers who have flown with Alaska Airlines,Delta, andFrontier from Seattle to Chicago have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
11,031 reviews
Check prices

Overall

8.0

Food

7.1

Boarding

8.1

Comfort

7.8

Entertainment

7.0

Crew

8.5

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
11,031 reviews
Alaska Airlines
8.0
Very good
11,031 reviews
Check prices

Overall

8.0

Food

7.1

Boarding

8.1

Comfort

7.8

Entertainment

7.0

Crew

8.5

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.
Delta
8.0
Very good
7,966 reviews
Alaska Airlines
8.0
Very good
11,031 reviews
Check prices

Overall

8.0

Food

7.1

Boarding

8.1

Comfort

7.8

Entertainment

7.0

Crew

8.5

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.
Frontier
5.8
Fair
3,145 reviews
Alaska Airlines
8.0
Very good
11,031 reviews
Check prices

Overall

8.0

Food

7.1

Boarding

8.1

Comfort

7.8

Entertainment

7.0

Crew

8.5

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 Chicago. 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?

    Most people fly from Seattle/Tacoma Intl (SEA) if they book a flight from Seattle to Chicago. On average, Seattle/Tacoma Intl has 49 outbound flights to Chicago per day from 1 airline. Seattle/Tacoma Intl is conveniently located just 18.4 km from Seattle’s city centre.

  • How long is the flight from Seattle to Chicago?

    A quick flight from Seattle to Chicago can take about 6h 25m. Delta provides one of the quickest options available for as low as C$ 275. There are 2760 km between Seattle and Chicago.

  • What is the cheapest airline to fly from Seattle to Chicago round-trip?

    Flying on Alaska Airlines is currently your cheapest option to Chicago, with prices starting at C$ 263. Alaska Airlines is 36% 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?

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Seattle to Chicago on time: KLM (100%), WestJet (95%), Austrian Airlines (92%).

  • What are the cheapest flights from Seattle to Chicago?

    On average you can expect to pay C$ 586 for a flight from Seattle to Chicago. The cheapest flight overall is C$ 136 while the most popular route, (Seattle/Tacoma Intl - Chicago O'Hare Intl) is currently priced at C$ 470.

  • Can I find deals for flights from Seattle to Chicago that include hotel bookings?

    Yes. In addition to deals on Seattle to Chicago flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Seattle to Chicago?

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

  • Can I find deals for business class flights from Seattle to Chicago?

    Yes. Cheapflights offers flight deals from Seattle to Chicago 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?

    Currently, February is the cheapest month in which you can book a flight from Seattle to Chicago (average of C$ 160). Flying from Seattle to Chicago in July 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

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Alternative routes for Seattle to Chicago

See prices for flight routes from nearby airports that may be better suited for you.
Seattle to O'Hare Intl flights

Top airline flying from Seattle to Chicago

Discover the top airline that operate flights from Seattle to Chicago. 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 7 October 2025.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapestC$ 263AverageC$ 373FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights

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Why should you use Cheapflights to find cheap flight tickets from Seattle to Chicago?

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Can Cheapflights find flights from Seattle to Chicago with no change fees?

Yes, we can. To see specific flights from Seattle to Chicago with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from Seattle to Chicago become cheaper?

Yes! Start tracking prices for Seattle to Chicago flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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