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Cheap flights from Seattle to Chicago from C$ 122

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 22/2. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — CHI
25 Feb — 4 Mar1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Chicago are usually found in February or August, booked 55 days in advance, depart on a Thursday or Friday and return on a Thursday

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 26 January 2026.

Thu 26/211:59 p.m.
SEA
-
ORD
Nonstop3h 57m
United Airlines
Tue 3/34:20 p.m.
ORD
-
SEA
Nonstop4h 43m
United Airlines
Deal found 25/1C$ 242
Sat 21/212:32 p.m.
SEA
-
ORD
1 stop8h 54m
United Airlines
Wed 25/24:20 p.m.
ORD
-
SEA
Nonstop4h 43m
United Airlines
Deal found 25/1C$ 251
Wed 25/210:22 a.m.
SEA
-
ORD
Nonstop4h 11m
Alaska Airlines
Sat 28/27:00 a.m.
ORD
-
SEA
Nonstop4h 51m
Alaska Airlines
Deal found 25/1C$ 256
Fri 27/25:55 p.m.
SEA
-
ORD
Nonstop4h 01m
Alaska Airlines
Mon 2/37:00 a.m.
ORD
-
SEA
Nonstop4h 51m
Alaska Airlines
Deal found 25/1C$ 270
Fri 13/311:59 p.m.
SEA
-
ORD
Nonstop3h 57m
United Airlines
Mon 16/38:01 p.m.
ORD
-
SEA
Nonstop4h 44m
United Airlines
Deal found 26/1C$ 275
Tue 21/412:08 p.m.
SEA
-
ORD
1 stop9h 29m
United Airlines
Sat 25/41:25 p.m.
ORD
-
SEA
Nonstop4h 38m
United Airlines
Deal found 25/1C$ 278
Tue 10/27:10 a.m.
SEA
-
ORD
Nonstop4h 12m
Delta
Thu 19/27:40 a.m.
ORD
-
SEA
Nonstop4h 45m
Delta
Deal found 25/1C$ 279
Fri 8/512:29 a.m.
SEA
-
ORD
Nonstop4h 11m
Alaska Airlines
Wed 20/53:43 p.m.
ORD
-
SEA
1 stop10h 11m
Alaska Airlines
Deal found 26/1C$ 284
Wed 11/28:10 a.m.
SEA
-
ORD
1 stop8h 27m
United Airlines
Tue 17/24:20 p.m.
ORD
-
SEA
Nonstop4h 43m
United Airlines
Deal found 25/1C$ 293
Fri 8/51:28 p.m.
SEA
-
ORD
Nonstop4h 24m
Alaska Airlines
Thu 14/56:00 a.m.
ORD
-
SEA
Nonstop4h 34m
Alaska Airlines
Deal found 26/1C$ 297
Fri 20/23:16 p.m.
SEA
-
ORD
1 stop6h 43m
United Airlines
Sun 1/37:59 p.m.
ORD
-
SEA
Nonstop4h 44m
United Airlines
Deal found 25/1C$ 300
Mon 16/311:59 p.m.
SEA
-
ORD
Nonstop3h 57m
United Airlines
Sat 21/38:01 p.m.
ORD
-
SEA
Nonstop4h 44m
United Airlines
Deal found 26/1C$ 301

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 26 January 2026.

Round-trip from

C$ 242

One-way from

C$ 122

Popular in

December

Cheapest in

February

Average price

C$ 378

Good round-trip deal

C$ 954 or less

Good one-way deal

C$ 450 or less
United Airlines
  • United Airlines
  • 26/2-3/3
  • Nonstop
  • 8h 40m total
  • Seattle to Chicago
Search Deals
Delta
  • Delta
  • 23/2
  • Nonstop
  • 3h 57m total
  • Seattle to Chicago
Search Deals
Highest demand for flights based on searches. 7% potential increase in price (C$ 44 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 13 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
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 26 January 2026.
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

Fri 6/3

7:10 a.m.-1:22 p.m.

Nonstop4h 12m

Chicago O'Hare Intl

Wed 11/3

2:20 p.m.-4:58 p.m.

Nonstop4h 38m

C$ 242

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Mon 4/5

11:48 p.m.-5:49 a.m.

Nonstop4h 01m

Chicago O'Hare Intl

Thu 7/5

4:20 p.m.-7:00 p.m.

Nonstop4h 40m

C$ 297

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Wed 15/4

7:15 a.m.-1:23 p.m.

Nonstop4h 08m

Chicago O'Hare Intl

Sun 19/4

7:15 a.m.-10:04 a.m.

Nonstop4h 49m

C$ 311

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Sat 21/2

11:59 p.m.-5:56 a.m.

Nonstop3h 57m

Chicago O'Hare Intl

Sun 15/3

8:01 p.m.-10:45 p.m.

Nonstop4h 44m

C$ 329

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Sat 7/3

7:10 a.m.-11:59 p.m.

1 stop14h 49m

Chicago O'Hare Intl

Sat 14/3

5:29 p.m.-8:16 p.m.

Nonstop4h 47m

C$ 338

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Thu 26/2

5:00 a.m.-2:05 p.m.

1 stop7h 05m

Chicago O'Hare Intl

Sat 28/2

3:05 p.m.-11:55 p.m.

2 stops10h 50m

C$ 367

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Fri 3/7

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

Nonstop4h 05m

Chicago O'Hare Intl

Sat 11/7

9:15 p.m.-12:05 a.m.

Nonstop4h 50m

C$ 371

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Sat 14/2

5:55 p.m.-11:52 p.m.

Nonstop3h 57m

Chicago O'Hare Intl

Mon 16/2

7:40 a.m.-10:25 a.m.

Nonstop4h 45m

C$ 379

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Sun 1/3

7:00 a.m.-1:06 p.m.

Nonstop4h 06m

Chicago O'Hare Intl

Sun 22/3

8:01 p.m.-10:45 p.m.

Nonstop4h 44m

C$ 386

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Fri 10/4

10:57 p.m.-3:18 p.m.

2 stops14h 21m

Chicago O'Hare Intl

Thu 16/4

12:46 p.m.-3:20 p.m.

Nonstop4h 34m

C$ 397

Flights are sorted by cheapest round-trip flights first.

Deals found on 25/1

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 23 January 2026.

To ensure you get the cheapest price possible for a flight from Seattle to Chicago, you should look to book at least 55 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$ 156). Flying from Seattle to Chicago in July is currently the most expensive (average of C$ 231). 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 26 January 2026.

It’s typically best to fly out from Seattle to Chicago in the afternoon. Doing so could potentially save you 55% 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 24 January 2026.

Travelers seeking maximum savings on their Seattle to Chicago flight should consider departing on Monday afternoons when fares are most often at their lowest. Saturday 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 26 January 2026.

The most flights from SEA to CHI are scheduled on a Monday (42 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (31 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$ 261.

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 26 January 2026.
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
11,792 reviews
Check prices

Entertainment

7.0

Food

7.1

Overall

8.0

Boarding

8.1

Crew

8.5

Comfort

7.8

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
Alaska Airlines
8.0
Very good
11,792 reviews
Alaska Airlines
8.0
Very good
11,792 reviews
Check prices

Entertainment

7.0

Food

7.1

Overall

8.0

Boarding

8.1

Crew

8.5

Comfort

7.8

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
Delta
7.9
Good
8,115 reviews
Alaska Airlines
8.0
Very good
11,792 reviews
Check prices

Entertainment

7.0

Food

7.1

Overall

8.0

Boarding

8.1

Crew

8.5

Comfort

7.8

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
American Airlines
7.2
Good
11,189 reviews
Alaska Airlines
8.0
Very good
11,792 reviews
Check prices

Entertainment

7.0

Food

7.1

Overall

8.0

Boarding

8.1

Crew

8.5

Comfort

7.8

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
Frontier
5.7
Fair
3,057 reviews
Alaska Airlines
8.0
Very good
11,792 reviews
Check prices

Entertainment

7.0

Food

7.1

Overall

8.0

Boarding

8.1

Crew

8.5

Comfort

7.8

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.

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 36 outbound flights to Chicago per day from 2 airlines. 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 01m. Delta provides one of the quickest options available for as low as C$ 297. There are 2760 km between Seattle and Chicago. This flight may include one or multiple stops.

  • What are the cheapest airlines flying from Seattle to Chicago round-trip?

    Flying on Hawaiian Airlines is currently your cheapest option to Chicago, with prices starting at C$ 119. Another option worth looking into is Alaska Airlines, starting at C$ 212 round trip. Hawaiian Airlines is 70% 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: Austrian Airlines (88%), Gulf Air (85%), Alaska Airlines (85%).

  • What are the cheapest flights from Seattle to Chicago?

    On average you can expect to pay C$ 795 for a flight from Seattle to Chicago. The cheapest flight overall is C$ 121 while the most popular route, (Seattle/Tacoma Intl - Chicago O'Hare Intl) is currently priced at C$ 382.

  • 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$ 156). Flying from Seattle to Chicago in July is currently the most expensive (average of C$ 231). 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 2 airlines flying from Seattle to Chicago

Discover the top 2 airlines 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 26 January 2026.
AirlineCheapestAverageFlexibilityOn-time
Hawaiian AirlinesCheapestC$ 119AverageC$ 438FlexibilityNo cancel feeOn-time85%
Search Hawaiian Airlines flights
Alaska AirlinesCheapestC$ 212AverageC$ 360FlexibilityNo 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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