WN4731Southwest Airlines · MDW → SDF
live · 39m ago
Route confirmed Southwest Airlines

WN4731 ChicagoMDW · 18:00 LouisvilleSDF · 20:15

WN4731 by Southwest Airlines flies from Chicago (MDW) to Louisville (SDF).

Right nowNext departure tomorrow Operates daily
06:35

scheduled from MDW

Typical gate push−2 minmedian posted departure
Typical arrival−25 minmedian over 4 operations
Wins back in air~23 minmedian gate push vs arrival · how planes make up time →

Where the minutes go

last 4 operations · gate push → arrival
0+30+60+90 min
11-11
−2 gate · −25 arrival
10-30
+34 gate · +17 arrival
10-29
−8 gate · −28 arrival
10-28
−2 gate · −25 arrival

The bar is how late it left the gate; the ring is where it actually arrived. Board clocks, not estimates.

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 MDW

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 SDF

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 WN4731 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 WN4731 actually runs

Pro Flight Search has tracked every published board update for WN4731 across the MDW and SDF boards: schedule changes, gate pushes and actual clocks. Usually lands ~20 min early. Based on 4 confirmed landings · 3/4 within 15 min of schedule. Pushes back late but makes up time in the air.

The verdict above is that record speaking, so it reflects how WN4731 operates rather than what the timetable promises. Numbers refresh as new flights operate.

Technical record

How this operation is measured

board clocksaircraft

Board log

scheduled → actual, per operation
11-11MDW 18:00 17:58 (−2)SDF 20:15 19:50 (−25)
10-30MDW 18:55 19:29 (+34)SDF 21:10 21:27 (+17)
10-29MDW 18:55 18:47 (−8)SDF 21:10 20:42 (−28)
10-28MDW 18:00 17:58 (−2)SDF 20:15 19:50 (−25)

Aircraft

Recent tails: N8936Q, N887Q, N7734H.

Board clocks recorded as MDW and SDF published them.

Planning around WN4731? 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: WN4731 Chicago to Louisville on-time performance, measured from the MDW and SDF airport boards.

Canonical URL
https://proflightsearch.com/flight/WN4731
How we measure this →