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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 16/2. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — CHI
3 Jan — 10 Jan1
1 adult
1 adult, Economy, 0 bags

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 Friday or Thursday and return on a Saturday

Cheap 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 4 December 2025.

Mon 29/127:10 a.m.SEA - ORD
Nonstop4h 10mDelta
Fri 9/17:30 a.m.ORD - SEA
Nonstop4h 45mDelta
Deal found 3/12C$ 247
Sun 28/126:00 a.m.SEA - ORD
Nonstop4h 13mAlaska Airlines
Wed 7/16:06 p.m.ORD - SEA
Nonstop4h 50mAlaska Airlines
Deal found 3/12C$ 251
Wed 31/121:25 p.m.SEA - ORD
1 stop8h 47mMultiple Airlines
Wed 7/18:00 a.m.ORD - SEA
Nonstop4h 46mMultiple Airlines
Deal found 3/12C$ 260
Fri 26/126:00 a.m.SEA - ORD
Nonstop4h 13mAlaska Airlines
Fri 9/12:06 p.m.ORD - SEA
1 stop6h 37mAlaska Airlines
Deal found 3/12C$ 261
Fri 26/1212:25 a.m.SEA - ORD
Nonstop4h 04mAlaska Airlines
Thu 8/16:06 p.m.ORD - SEA
Nonstop4h 50mAlaska Airlines
Deal found 3/12C$ 267
Sun 28/126:00 a.m.SEA - ORD
Nonstop4h 13mAlaska Airlines
Thu 8/18:00 a.m.ORD - SEA
Nonstop4h 46mAlaska Airlines
Deal found 3/12C$ 272
Wed 31/1210:55 p.m.SEA - ORD
1 stop8h 06mDelta
Sat 10/15:20 p.m.ORD - SEA
1 stop7h 02mDelta
Deal found 3/12C$ 275
Wed 17/122:08 p.m.SEA - ORD
1 stop7h 42mAlaska Airlines
Tue 6/18:00 a.m.ORD - SEA
Nonstop4h 47mAlaska Airlines
Deal found 3/12C$ 279
Fri 26/1212:25 a.m.SEA - ORD
Nonstop4h 04mAlaska Airlines
Fri 9/16:06 p.m.ORD - SEA
Nonstop4h 50mAlaska Airlines
Deal found 3/12C$ 283
Sun 28/127:10 a.m.SEA - ORD
Nonstop4h 10mDelta
Sat 10/17:30 a.m.ORD - SEA
Nonstop4h 45mDelta
Deal found 3/12C$ 286
Sun 28/126:00 a.m.SEA - ORD
Nonstop4h 13mAlaska Airlines
Fri 9/16:06 p.m.ORD - SEA
Nonstop4h 50mAlaska Airlines
Deal found 3/12C$ 289
Fri 26/1212:25 a.m.SEA - ORD
Nonstop4h 04mAlaska Airlines
Sun 11/16:06 p.m.ORD - SEA
Nonstop4h 50mAlaska Airlines
Deal found 3/12C$ 297

Find 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 4 December 2025.

Round-trip from

C$ 247

One-way from

C$ 131

Popular in

December

Cheapest in

January

Average price

C$ 526

Good round-trip deal

C$ 818 or less

Good one-way deal

C$ 224 or less
Delta
  • Delta
  • 5/2-8/2
  • 2 total stops
  • 16h 26m total
  • Seattle to Chicago
Search Deals
Alaska Airlines
  • Alaska Airlines
  • 16/2
  • 1 total stop
  • 13h 31m total
  • Seattle to Chicago
Search Deals
Highest demand for flights based on searches. 5% potential increase in price (C$ 33 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 15 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals
Price to beat on a round-trip flight from Seattle/Tacoma Intl to Chicago (CHI).
Search Deals
Price to beat on a one-way flight from Seattle/Tacoma Intl to Chicago (CHI).
Search Deals

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 4 December 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

Wed 31/12

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

Nonstop4h 04m

Chicago O'Hare Intl

Fri 9/1

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

Nonstop4h 45m

C$ 247

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Mon 29/12

7:10 a.m.-1:20 p.m.

Nonstop4h 10m

Chicago O'Hare Intl

Fri 9/1

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

Nonstop4h 45m

C$ 247

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Sat 24/1

6:05 a.m.-4:38 p.m.

1 stop8h 33m

Chicago O'Hare Intl

Fri 30/1

6:40 p.m.-12:09 a.m.

1 stop7h 29m

C$ 247

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Sat 14/3

5:30 a.m.-3:14 p.m.

1 stop7h 44m

Chicago O'Hare Intl

Mon 16/3

6:59 p.m.-12:03 a.m.

1 stop7h 04m

C$ 247

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Fri 16/1

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

Nonstop4h 00m

Chicago O'Hare Intl

Mon 19/1

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

Nonstop4h 46m

C$ 268

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Sat 7/2

10:32 a.m.-11:37 p.m.

1 stop11h 05m

Chicago O'Hare Intl

Mon 9/2

2:06 p.m.-6:43 p.m.

1 stop6h 37m

C$ 275

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Wed 31/12

10:55 p.m.-9:01 a.m.

1 stop8h 06m

Chicago O'Hare Intl

Sat 10/1

5:20 p.m.-10:22 p.m.

1 stop7h 02m

C$ 275

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Sat 10/1

5:25 a.m.-1:16 p.m.

1 stop5h 51m

Chicago O'Hare Intl

Sun 11/1

6:50 a.m.-2:21 p.m.

1 stop9h 31m

C$ 275

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Fri 16/1

9:25 a.m.-5:44 p.m.

1 stop6h 19m

Chicago O'Hare Intl

Mon 19/1

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

Nonstop4h 45m

C$ 286

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Thu 8/1

5:55 p.m.-11:53 p.m.

Nonstop3h 58m

Chicago O'Hare Intl

Sun 11/1

6:50 a.m.-2:21 p.m.

1 stop9h 31m

C$ 287

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/12

Showing 1-10 of 24 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 28 November 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 4 December 2025.

It’s typically best to fly out from Seattle to Chicago in the afternoon. Doing so could potentially save you 56% 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 29 November 2025.

Travelers seeking maximum savings on their Seattle to Chicago 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.

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 4 December 2025.

The most flights from SEA to CHI are scheduled on a Wednesday (48 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (22 on average).

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

What’s the top layover airport for flights from Seattle to Chicago?

Share of one-stop round-trip flights from Seattle to Chicago chosen by Cheapflights users in the past 12 months, using the same layover each way.

Denver (DEN) – chosen by Cheapflights users on 50% of one-stop itineraries from Seattle to Chicago on Cheapflights.

What’s the cheapest layover airport for flights from Seattle to Chicago?

Average round-trip fare for 1-stop flights from Seattle to Chicago, chosen by Cheapflights users in the past 12 months, with the same layover each way.

Las Vegas (LAS) is the most affordable 1-stop option, with an average round-trip price of C$ 266.

What’s the fastest layover option from Seattle to Chicago?

Shortest average travel time for 1-stop one-way flights from Seattle to Chicago, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.

Flights via Denver (DEN) have the shortest average one-way travel time for 1-stop routes: 9h 24m.

Which airport typically offers the quickest layover for flights from Seattle to Chicago?

Average layover duration for 1-stop one-way flights from Seattle to Chicago, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Denver (DEN) offer the fastest connection on this route, with an average layover time of 2h 26m.

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 4 December 2025.
See what other customers who have flown with Alaska Airlines,Delta, andAmerican Airlines 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
11,402 reviews
Check prices

Comfort

7.8

Overall

8.0

Crew

8.5

Boarding

8.1

Food

7.1

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
11,402 reviews
Alaska Airlines
8.0
Very good
11,402 reviews
Check prices

Comfort

7.8

Overall

8.0

Crew

8.5

Boarding

8.1

Food

7.1

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.
Delta
7.9
Good
8,011 reviews
Alaska Airlines
8.0
Very good
11,402 reviews
Check prices

Comfort

7.8

Overall

8.0

Crew

8.5

Boarding

8.1

Food

7.1

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.
American Airlines
7.2
Good
11,047 reviews
Alaska Airlines
8.0
Very good
11,402 reviews
Check prices

Comfort

7.8

Overall

8.0

Crew

8.5

Boarding

8.1

Food

7.1

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.
Frontier
5.8
Fair
3,090 reviews
Alaska Airlines
8.0
Very good
11,402 reviews
Check prices

Comfort

7.8

Overall

8.0

Crew

8.5

Boarding

8.1

Food

7.1

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 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 37 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 4h. Delta provides one of the quickest options available for as low as C$ 268. There are 2760 km between Seattle and Chicago. All flights are typically direct.

  • 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$ 216. Alaska Airlines is 48% 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: WestJet (100%), Austrian Airlines (95%), Royal Jordanian (92%).

  • What are the cheapest flights from Seattle to Chicago?

    On average you can expect to pay C$ 682 for a flight from Seattle to Chicago. The cheapest flight overall is C$ 159 while the most popular route, (Seattle/Tacoma Intl - Chicago O'Hare Intl) is currently priced at C$ 187.

  • 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

Browse thousands of different options on Cheapflights for your next trip

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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 4 December 2025.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapestC$ 216AverageC$ 373FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Seattle to Chicago?

Cheapflights helps you search for flights from Seattle to Chicago via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

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

Cheapflights simply makes it quick and affordable to book flights from Seattle to Chicago 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 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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