Best Time to Fly MDW to SDF: On-Time Stats by Hour & Airline
Chicago Midway International → Louisville Muhammad Ali International
Data through July 2026 · Last updated October 18, 2026
978 flights were scheduled from Chicago (MDW) to Louisville (SDF) in the last 12 months, and 83.2% of those that flew arrived on time, 5.5 points above the US average of 77.6%.
Southwest Airlines was the only reporting airline with regular flights on this route.
November has been the best month (90% on time) and Friday the weakest day of the week (77%).
1.5% of flights were cancelled, versus 1.8% nationally.
MDW to SDF on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| Southwest Airlines | 83.2% | 53 min | 1.5% | 978 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly MDW to SDF
On-time arrival % by scheduled departure hour (local time), 1,984 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 6am–7am | Limited data | 1 | |
| 7am–8am | 93.7% | 1.6% | 128 |
| 8am–9am | 94.1% | 0.0% | 68 |
| 9am–10am | 85.4% | 2.5% | 197 |
| 10am–11am | 93.8% | 0.0% | 256 |
| 11am–12pm | 85.4% | 0.0% | 48 |
| 12pm–1pm | 84.0% | 0.8% | 132 |
| 1pm–2pm | 81.4% | 0.0% | 87 |
| 2pm–3pm | 78.2% | 0.0% | 133 |
| 3pm–4pm | 79.3% | 0.7% | 151 |
| 4pm–5pm | 78.6% | 0.0% | 98 |
| 5pm–6pm | 69.5% | 1.7% | 60 |
| 6pm–7pm | 77.8% | 2.0% | 101 |
| 7pm–8pm | 74.2% | 2.1% | 190 |
| 8pm–9pm | 74.5% | 1.5% | 203 |
| 9pm–10pm | 69.2% | 2.5% | 80 |
| 10pm–11pm | 54.9% | 0.0% | 51 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on MDW to SDF
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | Limited data | 27 | ||
| Christmas & New Year (Dec 20 - Jan 3) | 74.2% | -9.3 pts | 0.0% | 66 |
| Summer peak (Jun 15 - Aug 15) | 74.0% | -9.6 pts | 1.3% | 390 |
| All other days | 83.6% | — | 1.0% | 1,501 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).