Best Time to Fly MDW to MKE: On-Time Stats by Hour & Airline
Chicago Midway International → General Mitchell International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 69.2% of Chicago (MDW) to Milwaukee (MKE) flights arrived on time (298 scheduled flights). That is 8.4 points below the national average of 77.6%.
Southwest Airlines was the only reporting airline with regular flights on this route.
May has been the best month (77% on time) and Friday the weakest day of the week (60%).
3.0% of flights were cancelled, versus 1.8% nationally.
MDW to MKE 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 | 69.2% | 63 min | 3.0% | 298 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly MDW to MKE
On-time arrival % by scheduled departure hour (local time), 298 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 9am–10am | Limited data | 8 | |
| 10am–11am | 90.6% | 0.0% | 117 |
| 11am–12pm | Limited data | 24 | |
| 6pm–7pm | Limited data | 9 | |
| 8pm–9pm | Limited data | 8 | |
| 9pm–10pm | 50.0% | 6.5% | 124 |
| 10pm–11pm | Limited data | 8 | |
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 MKE
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Summer peak (Jun 15 - Aug 15) | 68.5% | -1.1 pts | 2.1% | 94 |
| All other days | 69.5% | — | 3.4% | 204 |
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).