WN3657Southwest Airlines · MDW → SEA
live · 13m ago
Route confirmed Southwest Airlines

WN3657 ChicagoMDW SeattleSEA

WN3657 by Southwest Airlines flies from Chicago (MDW) to Seattle (SEA).

Right nowNext departure tomorrow Operates daily
10:05

scheduled from MDW

The route today

live boards
MDWChicagoOn-time likelyMDW delay board →
SEASeattleModerate riskSEA delay board →
MDW→SEAevery carrier, schedules and on-time historyRoute intelligence →

Weather lens

Delay & cancellation outlook for this flight

Measured, 90-day sample
34%Chance of 15+ min delay
1.0%Chance of cancellation
+5 minTypical airport delay in this weather

Conditions at MDW and SEA are near their clear-air norm right now, so this reflects the route's recent baseline rather than a weather penalty. These figures come from both airports' records under conditions like today's, over the last 90 days.

Pro Flight Search tracking, 90 days · the weather × delay correlation study → · live weather risk by airport →

Tomorrow at Chicago

Forecast

Sat 14 Nov, local date

High8°Clikely 7°C to 9°C
Low1°Clikely −1°C to 3°C

Forecast: GateWeather · incl. data from ECMWF (CC BY 4.0, modified) · Expected values for tomorrow from a forecast model, kept apart from today's measured figures.

Tomorrow at Seattle

Forecast

Sat 14 Nov, local date

High14°Clikely 13°C to 16°C
Low10°Clikely 8°C to 11°C
  • 92% chance of rain

Forecast: GateWeather · incl. data from ECMWF (CC BY 4.0, modified) · Expected values for tomorrow from a forecast model, kept apart from today's measured figures.

When it flies

scheduled departures
061422
M
T
W
T
F
S
S

Each mark is a scheduled departure at its origin-local time. Today is highlighted.

Other Chicago to Seattle flights today

same route · Southwest Airlines
WN1597departs 14:05
WN3032departs 20:45

If WN3657 is cancelled, these are the other Southwest Airlines nonstop flights from Chicago to Seattle on the same day, with scheduled departure times in MDW local time. Most flights that show a delay still operate. Rebooking usually helps only when that delay is very large. Every airline on this route →

How WN3657 actually runs

Pro Flight Search has tracked every published board update for WN3657 across the MDW and SEA boards: schedule changes, gate pushes and actual clocks. Combined risk score: 33.0/100. Based on airport operations, weather, and cached board history at MDW and SEA.

The verdict above is that record speaking, so it reflects how WN3657 operates rather than what the timetable promises. Numbers refresh as new flights operate.

Planning around WN3657? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure

Cite this data

Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.

Suggested citation

Pro Flight Search: WN3657 Chicago to Seattle on-time performance, measured from the MDW and SEA airport boards.

Canonical URL
https://proflightsearch.com/flight/WN3657
How we measure this →