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Cheap flights from Seattle to Chicago from C$ 121

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 24/5. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — CHI
2 Apr — 9 Apr1
1 adult

Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Chicago are usually found in January or September, booked 26 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 28 March 2025.

Round-trip from

C$ 242

One-way from

C$ 121

Popular in

December

Cheapest in

January

Average price

C$ 462

Good round-trip deal

C$ 314 or less

Good one-way deal

C$ 296 or less
Alaska Airlines
  • Alaska Airlines
  • 19/4-26/4
  • Nonstop
  • 8h 53m total
  • Seattle to Chicago
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Hawaiian Airlines
  • Hawaiian Airlines
  • 24/5
  • Nonstop
  • 4h 00m total
  • Seattle to Chicago
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Highest demand for flights based on searches. 2% potential increase in price (C$ 14 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 March 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

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 28 March 2025.

Sat 19/47:55 a.m.SEA - ORD
Nonstop4h 21mAlaska Airlines
Sat 26/49:00 a.m.ORD - SEA
Nonstop4h 32mAlaska Airlines
Deal found 27/3C$ 242
Tue 22/42:18 p.m.SEA - ORD
Nonstop4h 07mUnited Airlines
Wed 23/47:00 a.m.ORD - SEA
1 stop8h 59mUnited Airlines
Deal found 27/3C$ 250
Wed 23/42:50 p.m.SEA - ORD
1 stop6h 15mSouthwest
Wed 30/42:50 p.m.ORD - SEA
1 stop11h 00mSouthwest
Deal found 26/3C$ 277
Thu 1/55:55 p.m.SEA - ORD
Nonstop4h 04mDelta
Wed 7/56:20 p.m.ORD - SEA
Nonstop4h 30mDelta
Deal found 27/3C$ 284
Sun 1/65:55 p.m.SEA - ORD
Nonstop4h 04mHawaiian Airlines
Wed 4/67:00 a.m.ORD - SEA
1 stop7h 55mHawaiian Airlines
Deal found 27/3C$ 353
Sun 1/611:59 p.m.SEA - ORD
Nonstop4h 08mAmerican Airlines
Wed 4/67:35 a.m.ORD - SEA
Nonstop4h 40mAmerican Airlines
Deal found 27/3C$ 357
Fri 16/53:20 p.m.SEA - ORD
1 stop12h 05mSpirit Airlines
Sun 18/511:50 a.m.ORD - SEA
1 stop14h 20mSpirit Airlines
Deal found 26/3C$ 420
Thu 1/56:33 p.m.SEA - ORD
1 stop22h 36mSun Country Air
Thu 8/58:05 p.m.ORD - SEA
1 stop23h 22mSun Country Air
Deal found 27/3C$ 486
Thu 15/57:10 p.m.SEA - ORD
1 stop15h 17mMultiple Airlines
Sun 18/511:50 a.m.ORD - SEA
1 stop14h 20mMultiple Airlines
Deal found 26/3C$ 495

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 28 March 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 19/4

7:55 a.m.-2:16 p.m.

Nonstop4h 21m

Chicago O'Hare Intl

Sat 26/4

9:00 a.m.-11:32 a.m.

Nonstop4h 32m

C$ 242

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Tue 22/4

2:18 p.m.-8:25 p.m.

Nonstop4h 07m

Chicago O'Hare Intl

Wed 23/4

7:00 a.m.-1:59 p.m.

1 stop8h 59m

C$ 250

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Wed 23/4

2:50 p.m.-11:05 p.m.

1 stop6h 15m

Chicago O'Hare Intl

Wed 30/4

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

1 stop11h 00m

C$ 277

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Thu 1/5

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

Nonstop4h 04m

Chicago O'Hare Intl

Wed 7/5

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

Nonstop4h 30m

C$ 284

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Sun 1/6

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

Nonstop4h 04m

Chicago O'Hare Intl

Wed 4/6

7:00 a.m.-12:55 p.m.

1 stop7h 55m

C$ 353

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Sun 1/6

11:59 p.m.-6:07 a.m.

Nonstop4h 08m

Chicago O'Hare Intl

Wed 4/6

7:35 a.m.-10:15 a.m.

Nonstop4h 40m

C$ 357

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Fri 16/5

3:20 p.m.-5:25 a.m.

1 stop12h 05m

Chicago O'Hare Intl

Sun 18/5

11:50 a.m.-12:10 a.m.

1 stop14h 20m

C$ 420

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Thu 1/5

6:33 p.m.-7:09 p.m.

1 stop22h 36m

Chicago O'Hare Intl

Thu 8/5

8:05 p.m.-5:27 p.m.

1 stop23h 22m

C$ 486

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Thu 15/5

7:10 p.m.-12:27 p.m.

1 stop15h 17m

Chicago O'Hare Intl

Sun 18/5

11:50 a.m.-12:10 a.m.

1 stop14h 20m

C$ 495

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Sat 24/5

11:40 p.m.-5:40 a.m.

Nonstop4h 00m

C$ 121

Flights are sorted by cheapest round-trip flights first.

Deals found on 27/3

Showing 1-10 of 16 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 21 March 2025.

To ensure you get the cheapest price possible for a flight from Seattle to Chicago, you should look to book at least 26 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, January is the cheapest month in which you can book a flight from Seattle to Chicago (average of C$ 261). Flying from Seattle to Chicago in March is currently the most expensive (average of C$ 355). 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 28 March 2025.

It’s typically best to fly out from Seattle to Chicago in the afternoon. Doing so could potentially save you 73% 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 23 March 2025.

Travelers seeking maximum savings on their Seattle to Chicago flight should consider departing on Friday afternoons when fares are most often at their lowest. Tuesday mornings 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 28 March 2025.

The most flights from SEA to CHI are scheduled on a Thursday (45 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (17 on average).

Rainfall in Chicago by month

Plan your trip to Chicago by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Chicago ranges from 43.0 - 125.0 mm per month. August is typically the wettest month, when rainfall can reach 125.0 mm. January is typically the driest time to visit Chicago when rainfall is around 43.0 mm.

Temperature in Chicago by month

Plan your trip to Chicago by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Chicago, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 23.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -5.0 C).

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 28 March 2025.
Read reviews from past customers who have flown Southwest, Alaska Airlines and Delta from Seattle to Chicago. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,273 reviews
Check prices

Entertainment

7.6

Comfort

8.1

Boarding

8.2

Food

7.1

Overall

8.1

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Southwest
8.1
Very good
4,273 reviews
Southwest
8.1
Very good
4,273 reviews
Check prices

Entertainment

7.6

Comfort

8.1

Boarding

8.2

Food

7.1

Overall

8.1

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Alaska Airlines
8.0
Very good
9,798 reviews
Southwest
8.1
Very good
4,273 reviews
Check prices

Entertainment

7.6

Comfort

8.1

Boarding

8.2

Food

7.1

Overall

8.1

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Delta
8.0
Very good
7,896 reviews
Southwest
8.1
Very good
4,273 reviews
Check prices

Entertainment

7.6

Comfort

8.1

Boarding

8.2

Food

7.1

Overall

8.1

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Hawaiian Airlines
7.9
Good
2,336 reviews
Southwest
8.1
Very good
4,273 reviews
Check prices

Entertainment

7.6

Comfort

8.1

Boarding

8.2

Food

7.1

Overall

8.1

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
United Airlines
7.4
Good
8,603 reviews
Southwest
8.1
Very good
4,273 reviews
Check prices

Entertainment

7.6

Comfort

8.1

Boarding

8.2

Food

7.1

Overall

8.1

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

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 27 outbound flights to Chicago per day from 2 airlines. Seattle/Tacoma Intl is conveniently located just 18.4 km from Seattle’s city centre.

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

    Flying on Alaska Airlines is currently your cheapest option to Chicago, with prices starting at C$ 242. Additional round-trip tickets that might be worth considering are offered by United Airlines and Southwest, with the lowest prices starting at C$ 250 and C$ 277, respectively. Alaska Airlines is 44% 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 one-way?

    The cheapest airlines for a one-way flight from Seattle to Chicago are Hawaiian Airlines (C$ 121), Alaska Airlines (C$ 129), and Southwest (C$ 134).

  • 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: United Airlines (91%), Avianca (91%), American Airlines (89%).

  • What are the cheapest flights from Seattle to Chicago?

    On average you can expect to pay C$ 415 for a flight from Seattle to Chicago. The cheapest flight overall is C$ 227 while the most popular route, (Seattle/Tacoma Intl - Chicago O'Hare Intl) is currently priced at C$ 376.

  • 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, January is the cheapest month in which you can book a flight from Seattle to Chicago (average of C$ 261). Flying from Seattle to Chicago in March is currently the most expensive (average of C$ 355). 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 28 March 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapestC$ 121AverageC$ 520FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Alaska AirlinesCheapestC$ 182AverageC$ 351FlexibilityNo 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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