WN8666Southwest Airlines · MDW → SDF
live · 8m ago
Route confirmed Southwest Airlines

WN8666 ChicagoMDW LouisvilleSDF

WN8666 by Southwest Airlines flies from Chicago (MDW) to Louisville (SDF).

Right nowNext departure today Operates daily
13:20

scheduled from MDW

The route today

live boards
MDWChicagoOn-time likelyMDW delay board →
SDFLouisvilleHigh riskSDF delay board →
MDW→SDFevery carrier, schedules and on-time historyRoute intelligence →

Weather lens

Delay & cancellation outlook for this flight

Measured, 90-day sample
37%Chance of 15+ min delay
0.8%Chance of cancellation
+5 minTypical airport delay in this weather

Conditions at MDW and SDF 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

Thu 12 Nov, local date

High10°Clikely 8°C to 11°C
Low5°Clikely 2°C to 6°C
  • 84% 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.

Tomorrow at Louisville

Forecast

Thu 12 Nov, local date

High14°Clikely 12°C to 16°C
Low8°Clikely 5°C to 10°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.

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 Louisville flights today

same route · Southwest Airlines
WN2439departs 07:45
WN389departs 07:55
WN3854departs 08:15
WN8664departs 11:50
WN726departs 12:50
WN349departs 13:20

If WN8666 is cancelled, these are the other Southwest Airlines nonstop flights from Chicago to Louisville 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 WN8666 actually runs

Pro Flight Search has tracked every published board update for WN8666 across the MDW and SDF boards: schedule changes, gate pushes and actual clocks. Combined risk score: 50.0/100. Based on airport operations, weather, and cached board history at MDW and SDF.

The verdict above is that record speaking, so it reflects how WN8666 operates rather than what the timetable promises. Numbers refresh as new flights operate.

Planning around WN8666? 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: WN8666 Chicago to Louisville on-time performance, measured from the MDW and SDF airport boards.

Canonical URL
https://proflightsearch.com/flight/WN8666
How we measure this →