Trip.com
>
Flights
>
Flights to United States
>
Flights to Illinois
>
Flights to Chicago
>
Seattle to Chicago flight
>
Seattle-Tacoma International Airport to Chicago flight

Explore the cheapest one-way and round-trip flights from Seattle-Tacoma International Airport to Chicago over the next 90 days, with one-way fares from US$103 and round-trip from US$185. Based on Trip.com's latest 7-day flight data.

      • Cheapest nonstop
        SEA 11:56
        4h 24m
        Nonstop
        ORD 18:20
        Seattle - Chicago | Wed, Oct 21 | Alaska Airlines
        ORD 07:00
        4h 42m
        Nonstop
        SEA 09:42
        Chicago - Seattle | Wed, Oct 28 | Alaska Airlines
        US$185 US$256
        28% off
        28% off
        US$256 US$185
      • SEA 17:51
        4h 8m
        Nonstop
        ORD 23:59
        Seattle - Chicago | Fri, Oct 2 | Alaska Airlines
        ORD 19:16
        4h 43m
        Nonstop
        SEA 21:59
        Chicago - Seattle | Mon, Oct 5 | Alaska Airlines
        US$189 US$256
        26% off
        26% off
        US$256 US$189
      • SEA 17:30
        4h 4m
        Nonstop
        ORD 23:34
        Seattle - Chicago | Wed, Oct 21 | Delta Air Lines
        ORD 06:35
        4h 45m
        Nonstop
        SEA 09:20
        Chicago - Seattle | Wed, Oct 28 | Delta Air Lines
        US$191 US$256
        25% off
        25% off
        US$256 US$191
      • SEA 21:45
        29h 53m
        1 stop
        ORD 05:38
        Seattle - Chicago | Mon, Sep 21 | Frontier Airlines
        ORD 13:21
        22h 21m
        1 stop
        SEA 09:42
        Chicago - Seattle | Wed, Sep 23 | Frontier Airlines
        US$185
        28% off
        US$256 US$185
      • SEA 19:00
        8h 42m
        1 stop
        ORD 05:42
        Seattle - Chicago | Mon, Oct 26 | Frontier Airlines
        ORD 11:06
        24h 45m
        1 stop
        SEA 09:51
        Chicago - Seattle | Wed, Oct 28 | Frontier Airlines
        US$185
        28% off
        US$256 US$185
      • SEA 10:57
        16h 41m
        1 stop
        ORD 05:38
        Seattle - Chicago | Tue, Sep 15 | Frontier Airlines
        ORD 06:30
        10h 38m
        1 stop
        SEA 15:08
        Chicago - Seattle | Sat, Sep 19 | Frontier Airlines
        US$190
        26% off
        US$256 US$190
      • SEA 19:00
        8h 35m
        1 stop
        ORD 05:35
        Seattle - Chicago | Thu, Oct 29 | Frontier Airlines
        ORD 07:00
        29h
        1 stop
        SEA 10:00
        Chicago - Seattle | Wed, Nov 4 | Frontier Airlines
        US$190
        26% off
        US$256 US$190
      • SEA 20:00
        8h 34m
        1 stop
        ORD 06:34
        Seattle - Chicago | Tue, Oct 13 | Frontier Airlines
        ORD 06:30
        10h 42m
        1 stop
        SEA 15:12
        Chicago - Seattle | Tue, Oct 20 | Frontier Airlines
        US$191
        25% off
        US$256 US$191
      • SEA 21:45
        29h 53m
        1 stop
        ORD 05:38
        Seattle - Chicago | Wed, Sep 16 | Frontier Airlines
        ORD 06:30
        10h 38m
        1 stop
        SEA 15:08
        Chicago - Seattle | Sat, Sep 19 | Frontier Airlines
        US$192
        25% off
        US$256 US$192
      • SEA 17:49
        4h 10m
        Nonstop
        ORD 23:59
        Seattle - Chicago | Thu, Oct 22 | Alaska Airlines
        ORD 06:30
        10h 42m
        1 stop
        SEA 15:12
        Chicago - Seattle | Sat, Oct 24 | Frontier Airlines
        US$236
        8% off
        US$256 US$236
      • SEA 17:30
        4h 4m
        Nonstop
        ORD 23:34
        Seattle - Chicago | Thu, Oct 22 | Delta Air Lines
        ORD 06:30
        10h 42m
        1 stop
        SEA 15:12
        Chicago - Seattle | Sat, Oct 24 | Frontier Airlines
        US$240
        6% off
        US$256 US$240
      • SEA 13:00
        17h 25m
        1 stop
        CHI 14:00
        Seattle - Chicago | Tue, Sep 15 | Normal Airline
        CHI 15:00
        6h
        Nonstop
        SEA 16:00
        Chicago - Seattle | Thu, Sep 17 | Normal Airline
        More cheap flights
        More cheap flights
      • Cheapest nonstop
        SEA 23:59
        4h 6m
        Nonstop
        ORD 06:05
        Seattle - Chicago | Fri, Oct 9 | American Airlines
        US$103 US$137
        25% off
        25% off
        US$137 US$103
      • SEA 17:53
        4h 4m
        Nonstop
        ORD 23:57
        Seattle - Chicago | Tue, Oct 20 | Delta Air Lines
        US$122 US$137
        11% off
        11% off
        US$137 US$122
      • SEA 06:00
        4h 7m
        Nonstop
        ORD 12:07
        Seattle - Chicago | Sat, Sep 19 | Alaska Airlines
        US$126 US$137
        8% off
        8% off
        US$137 US$126
      • SEA 16:27
        5h 54m
        1 stop
        ORD 00:21
        Seattle - Chicago | Fri, Nov 6 | Frontier Airlines
        US$106
        23% off
        US$137 US$106
      • SEA 20:00
        8h 34m
        1 stop
        ORD 06:34
        Seattle - Chicago | Fri, Oct 23 | Frontier Airlines
        US$108
        21% off
        US$137 US$108
      • SEA 19:41
        12h 20m
        1 stop
        ORD 10:01
        Seattle - Chicago | Tue, Oct 27 | Frontier Airlines
        US$117
        15% off
        US$137 US$117
      • SEA 20:00
        8h 34m
        1 stop
        ORD 06:34
        Seattle - Chicago | Mon, Oct 19 | Frontier Airlines
        US$121
        12% off
        US$137 US$121
      • SEA 20:00
        8h 34m
        1 stop
        ORD 06:34
        Seattle - Chicago | Fri, Oct 16 | Frontier Airlines
        US$122
        11% off
        US$137 US$122
      • SEA 21:13
        30h
        1 stop
        ORD 05:13
        Seattle - Chicago | Thu, Nov 5 | Frontier Airlines
        US$123
        10% off
        US$137 US$123
      • SEA 21:16
        30h
        1 stop
        ORD 05:16
        Seattle - Chicago | Thu, Oct 8 | Frontier Airlines
        US$125
        9% off
        US$137 US$125
      • SEA 10:57
        16h 41m
        1 stop
        ORD 05:38
        Seattle - Chicago | Tue, Sep 22 | Frontier Airlines
        US$128
        7% off
        US$137 US$128
      • SEA 13:00
        17h 25m
        1 stop
        CHI 14:00
        Seattle - Chicago | Tue, Sep 15 | Normal Airline
        More cheap flights
        More cheap flights

Displayed flight fares from Seattle-Tacoma International Airport to Chicago are based on average prices across airlines for the next 3 months, according to the latest Trip.com database.

Trip.com Price Insights: Flights from Seattle-Tacoma International Airport to Chicago

Which month offers the lowest one-way fares from Seattle-Tacoma International Airport to Chicago?

Data is based on the past 12 months. It shows the average one-way fares by month for flights from Seattle-Tacoma International Airport to Chicago on Trip.com.

Based on Trip.com data from the past 12 months, the lowest-priced month for one-way flights from Seattle-Tacoma International Airport to Chicago is September, with an average fare of US$162. The most expensive month is usually August, with average fares reaching US$244.

US$244
US$203
US$162
US$121
  • US$162
    Sep
  • US$200
    Oct
  • US$222
    Nov
  • US$193
    Dec
  • US$167
    Jan
  • US$217
    Feb
  • US$218
    Mar
  • US$180
    Apr
  • US$213
    May
  • US$240
    Jun
  • US$234
    Jul
  • US$244
    Aug

Which day of the week offers the cheapest flights from Seattle-Tacoma International Airport to Chicago?

Data is based on the past 12 months. It shows the average fares by day of the week for flights from Seattle-Tacoma International Airport to Chicago on Trip.com.

Based on Trip.com data from the past 12 months, the cheapest day to depart from Seattle-Tacoma International Airport to Chicago is Wednesday, when average fares are usually lower than other days. Avoid departing on Sunday, as fares are typically the highest.

US$242
US$216
US$189
US$163
    Cheapest
  • US$198
    Mon
  • US$221
    Tue
  • US$189
    Wed
  • US$211
    Thu
  • US$212
    Fri
  • US$189
    Sat
  • US$242
    Sun

Which airlines are the most popular for Seattle-Tacoma International Airport to Chicago flights?

The most popular airlines flying from Seattle-Tacoma International Airport to Chicago are Alaska Airlines, American Airlines, and Delta Air Lines, among 3 carriers on this route. American Airlines offers the lowest fares. Based on Trip.com's flight booking data from the previous 12 months.
Alaska Airlines logo Alaska Airlines
American Airlines logo American Airlines
Delta Air Lines logo Delta Air Lines

Flight Schedule from Seattle-Tacoma International Airport to Chicago

Check on the flight schedule from Seattle-Tacoma International Airport to Chicago. Find the flight that matches your travel plan.

Flight info.
Departure
Arrival
Weekly Schedule

  1. AA2379

    Seattle-Tacoma International Airport

    23:57

    SEA

    4h 8m

    06:05

    ORD

    S M T W T F S
    Search

  2. AS328

    Seattle-Tacoma International Airport

    00:58

    SEA

    4h 2m

    07:00

    ORD

    S M T W T F S
    Search

  3. DL2108

    Seattle-Tacoma International Airport

    17:45

    SEA

    4h 1m

    23:46

    ORD

    S M T W T F S
    Search

  4. AS410

    Seattle-Tacoma International Airport

    12:45

    SEA

    4h 10m

    18:55

    ORD

    S M T W T F S
    Search

  5. AS538

    Seattle-Tacoma International Airport

    17:50

    SEA

    4h 9m

    23:59

    ORD

    S M T W T F S
    Search

  6. F93406

    Seattle-Tacoma International Airport

    16:27

    SEA

    2h 48m

    Nonstop

    20:15

    DEN

    S M T W T F S
    Search

  7. F93174

    Denver International Airport

    20:59

    DEN

    2h 27m

    Nonstop

    00:26

    ORD

    S M T W T F S

  8. DL1120

    Seattle-Tacoma International Airport

    13:30

    SEA

    2h 7m

    Nonstop

    16:37

    SLC

    S M T W T F S
    Search

  9. DL2413

    Salt Lake City International Airport

    17:45

    SLC

    3h 8m

    Nonstop

    21:53

    ORD

    S M T W T F S

  10. DL943

    Seattle-Tacoma International Airport

    06:05

    SEA

    3h 27m

    Nonstop

    11:32

    MSP

    S M T W T F S
    Search

  11. DL4714

    Minneapolis-Saint Paul International Airport

    15:00

    MSP

    1h 50m

    Nonstop

    16:50

    MDW

    S M T W T F S

  12. DL567

    Seattle-Tacoma International Airport

    21:20

    SEA

    4h 48m

    Nonstop

    05:08

    ATL

    S M T W T F S
    Search

  13. DL1063

    Hartsfield–Jackson Atlanta International Airport

    08:55

    ATL

    1h 54m

    Nonstop

    09:49

    MDW

    S M T W T - S

  14. DL560

    Seattle-Tacoma International Airport

    08:59

    SEA

    4h 34m

    Nonstop

    16:33

    ATL

    S M T W T F S
    Search

  15. DL2894

    Hartsfield–Jackson Atlanta International Airport

    11:30

    ATL

    2h 11m

    Nonstop

    12:41

    ORD

    S M T W T F S
Find more flights and airlines

What to know about flights from Seattle-Tacoma International Airport to Chicago?

Cheapest return ticket price US$185
Cheapest one-way flight price US$94
Cheapest month November
Peak season for travel July

FAQs for Seattle-Tacoma International Airport to Chicago Flights

  • When is peak season for travel to Chicago?

    ؜The peak travel time for visiting Chicago is September. During this time, flights from Seattle-Tacoma International Airport to Chicago are the most expensive. Cheap tickets can still be booked on Trip.com.
  • Flights from Seattle-Tacoma International Airport (SEA) to O'Hare International Airport (CHI) take around 4 hours 3 minutes.
  • The earliest flight departs from Seattle-Tacoma International Airport at 06:00 and arrives in Chicago at 12:13.
  • The latest flight departs from Seattle-Tacoma International Airport at 18:15 and arrives in Chicago at 00:24.
    • The distance from O'Hare International Airport to downtown is about 25 km, by taxi about 40 minutes.
    • The distance from Chicago Midway International Airport to downtown is about 14 km, by taxi about 30 minutes.

Popular Destinations

Note: Prices shown on this page are the estimated lowest prices found in the last 24 hours and include all taxes and fees.

Book with no extra fees

Prices displayed on this page are all-inclusive (incl. taxes, fuel surcharges, Civil Aviation Development Fund, etc.), and all fees are clearly shown before you pay. Charges for checked baggage, onboard meals, Wi‑Fi, and other optional services are also included where applicable in the flight cards.

Real-time pricing updates

Prices, availability, and travel details on this page have been updated within the last 24 hours, and for many routes are refreshed in real time. The more popular the route, the more accurate and up-to-date the data.

Change & Cancellation Policy

Trip.com shows the change and cancellation rules for each ticket during the booking process, including all related fees and conditions. Please refer to the following scenarios:
Voluntary cancellation/change:
To request a change or cancellation, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and flight segment, and submit your request. Please note that additional charges may apply based on the airline’s fare rules.
Cancellation/change due to a flight schedule change:
If your flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For full details of change and cancellation policies, please refer to the customer support pages.