Chicago Midway International Airport
Chicago, United StatesMDW / KMDW
Major airport · 108 direct destinations · 4 runways · longest runway 6,522 ft
52 °F · CloudySource: METAR observation via the NOAA Aviation Weather Center
Route
Chicago → Seattle
MDW
ChicagoChicago Midway International Airport
ChicagoChicago Midway International AirportSEASeattleSeattle–Tacoma International Airport
SeattleSeattle–Tacoma International Airport- Distance
- 1,729 mi
- Estimated flight time
- ~4h
Seattle is currently 2 hours behind Chicago.
Observed nonstop
How often does this route fly?
Frequency
A couple of times a day
On average around 2 flights a day, observed from October 2025 to September 2026.
- 2
- flights per day
- 3
- busiest month · Aug
- 1
- quietest month · Oct
- 4 hr 2 min
- measured flight time
- 12 / 12
- months seen
Through the year
Per day, month by month
- 1Jan2026
- 1Feb
- 2Mar
- 2Apr
- 2May
- 2.5Jun
- 2Jul
- 3Aug
- 3Sep
- 1Oct2025
- 1Nov
- 1Dec
Airlines
Who flies it
Southwest Airlinesall year
Through the day
Departure times
Local time in Chicago. Most departures between 10:00 and 13:00.
- 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
- 1.8Mon
- 1.7Tue
- 1.7Wed
- 1.7Thu
- 1.7Fri
- 1.5Sat
- 1.4Sun
Fleet
Aircraft observed
- Boeing 737 MAX 8B38M55%
- Boeing 737-700B73724%
- Boeing 737-800B73820%
All the numbers in a table
| Month | Per day | Seen | Airlines |
|---|---|---|---|
| January 2026 | 1 | 29 |
|
| February 2026 | 1 | 27 |
|
| March 2026 | 2 | 53 |
|
| April 2026 | 2 | 52 |
|
| May 2026 | 2 | 53 |
|
| June 2026 | 2.5 | 74 |
|
| July 2026 | 2 | 75 |
|
| August 2026 | 3 | 76 |
|
| September 2026 | 3 | 79 |
|
| October 2025 | 1 | 34 |
|
| November 2025 | 1 | 18 |
|
| December 2025 | 1 | 21 |
|
Airlines observed on this route
From observed callsign routes on MDW-SEA - not a booking guarantee.
About this route
- Domestic route: both airports are in the same country.
- The 10th longest observed direct route from MDW, out of 108.
- The opposite direction has also been observed as a direct connection.
- Direct destinations observed from Chicago: 108.
- Direct destinations observed from Seattle: 132.
The airports on this route
Seattle–Tacoma International Airport
Seattle, United StatesSEA / KSEA
International hub · 132 direct destinations · 3 runways · longest runway 11,900 ft
52 °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 Chicago to Seattle
The observed direct connection between Chicago Midway International Airport (MDW) and Seattle–Tacoma International Airport (SEA) covers approximately 1,729 mi. The estimated flight time is around 4h. Southwest Airlines has been observed on this connection in the available route data.
Frequently asked questions about this route
- How far is Chicago from Seattle by air?
- The great-circle distance between Chicago Midway International Airport and Seattle–Tacoma International Airport is approximately 1,729 mi.
- How long is the flight from Chicago to Seattle?
- Based on the distance, the estimated flight time is about 4h. This is an estimate, not a schedule.
- Is there a direct connection from Chicago to Seattle?
- Yes, a direct connection between MDW and SEA has been observed in our route data.
- Which airlines have been observed on this route?
- In the available route data: Southwest Airlines.
- How often is there a flight from Chicago to Seattle?
- On average around 2 flights a day, measured over twelve months (October 2025 to September 2026) in the flight archive, with 591 observed flights. Mainly Southwest Airlines. That is an observation, not a timetable.
- What is the current time difference between Chicago and Seattle?
- Seattle is currently 2 hours behind Chicago.
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.