Seattle–Tacoma International Airport
Seattle, United StatesSEA / KSEA
International hub · 132 direct destinations · 3 runways · longest runway 11,900 ft
47 °F · FogSource: METAR observation via the NOAA Aviation Weather Center
Route
Seattle → Chicago
SEA
SeattleSeattle–Tacoma International Airport
SeattleSeattle–Tacoma International AirportORDChicagoChicago O'Hare International Airport
ChicagoChicago O'Hare International Airport- Distance
- 1,716 mi
- Estimated flight time
- ~3h 55m
Chicago is currently 2 hours ahead of Seattle.
Observed nonstop
How often does this route fly?
Frequency
Throughout the day
On average around 16.25 flights a day, observed from October 2025 to September 2026.
- 16.3
- flights per day
- 18.5
- busiest month · Jun
- 10
- quietest month · Jan
- 3 hr 21 min
- measured flight time
- 12 / 12
- months seen
Through the year
Per day, month by month
- 10Jan2026
- 12Feb
- 13Mar
- 16.5Apr
- 17May
- 18.5Jun
- 18Jul
- 18Aug
- 17Sep
- 16Oct2025
- 13Nov
- 12Dec
Airlines
Who flies it
Alaska Airlinesall year
United Airlinesall year
American Airlinesall year
Delta Air Linesall year
China Cargo Airlineswinter
Through the day
Departure times
Local time in Seattle. Most departures between 06:00 and 09:00.
- 00:00
- 01:00
- 02:00
- 03:00
- 04:00
- 05:00
- 06:00
- 07:00
- 08:00
- 09:00
- 10:00
- 11:00
- 12:00
- 13:00
- 14:00
- 15:00
- 16:00
- 17:00
- 18:00
- 19:00
- 20:00
- 21:00
- 22:00
- 23:00
Through the week
By weekday
- 15.5Mon
- 14.5Tue
- 14.1Wed
- 14.9Thu
- 15.9Fri
- 14.4Sat
- 15.3Sun
Fleet
Aircraft observed
- Boeing 737-800B73829%
- Boeing 737-900B73918%
- Boeing 737 MAX 9B39M16%
- Airbus A321A32110%
- Airbus A321neoA21N6%
All the numbers in a table
| Month | Per day | Seen | Airlines |
|---|---|---|---|
| January 2026 | 10 | 322 |
|
| February 2026 | 12 | 335 |
|
| March 2026 | 13 | 379 |
|
| April 2026 | 16.5 | 475 |
|
| May 2026 | 17 | 485 |
|
| June 2026 | 18.5 | 543 |
|
| July 2026 | 18 | 555 |
|
| August 2026 | 18 | 525 |
|
| September 2026 | 17 | 513 |
|
| October 2025 | 16 | 498 |
|
| November 2025 | 13 | 394 |
|
| December 2025 | 12 | 360 |
|
Airlines observed on this route
From observed callsign routes on SEA-ORD - not a booking guarantee.
About this route
- Domestic route: both airports are in the same country.
- The opposite direction has also been observed as a direct connection.
- Direct destinations observed from Seattle: 132.
- Direct destinations observed from Chicago: 259.
The airports on this route
Chicago O'Hare International Airport
Chicago, United StatesORD / KORD
International hub · 259 direct destinations · 8 runways · longest runway 12,999 ft
51 °F · CloudySource: METAR observation via the NOAA Aviation Weather Center
Alternative airports for this journey
Same journey, a different airport nearby - with an observed direct connection.
About the route from Seattle to Chicago
The observed direct connection between Seattle–Tacoma International Airport (SEA) and Chicago O'Hare International Airport (ORD) covers approximately 1,716 mi. The estimated flight time is around 3h 55m. Alaska Airlines, American Airlines, China Cargo Airlines, Delta Air Lines and United Airlines have been observed on this connection in the available route data.
Frequently asked questions about this route
- How far is Seattle from Chicago by air?
- The great-circle distance between Seattle–Tacoma International Airport and Chicago O'Hare International Airport is approximately 1,716 mi.
- How long is the flight from Seattle to Chicago?
- Based on the distance, the estimated flight time is about 3h 55m. This is an estimate, not a schedule.
- Is there a direct connection from Seattle to Chicago?
- Yes, a direct connection between SEA and ORD has been observed in our route data.
- Which airlines have been observed on this route?
- In the available route data: Alaska Airlines, American Airlines, China Cargo Airlines, Delta Air Lines and United Airlines.
- How often is there a flight from Seattle to Chicago?
- On average around 16.25 flights a day, measured over twelve months (October 2025 to September 2026) in the flight archive, with 5,384 observed flights. Mainly Alaska Airlines, United Airlines, American Airlines. That is an observation, not a timetable.
- What is the current time difference between Seattle and Chicago?
- Chicago is currently 2 hours ahead of Seattle.
Where this data comes from
The route data comes from the flight archive (ADS-B, adsb.lol): which connections actually flew over the last twelve full months and who flew them, combined with our own airport, runway, and airline datasets. It is reference data about observed routes - not a current timetable and no claim about bookability.
The frequency and aircraft on this page come from the flight archive (ADS-B, 12 months, October 2025 to September 2026), summarized per route per month. We do not see every flight, so it is a floor, not a count.
Route data updated on October 11, 2026.