Best Time to Fly MKE to MDW: On-Time Stats by Hour & Airline
General Mitchell International → Chicago Midway International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 71.6% of Milwaukee (MKE) to Chicago (MDW) flights arrived on time (298 scheduled flights). That is 6.0 points below the national average of 77.6%.
Southwest Airlines was the only reporting airline with regular flights on this route.
Over 24 months, Tuesday was the most reliable day (90% on time) and March the worst month (57%).
The cancellation rate was 1.7% (US average 1.8%).
MKE to MDW 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 | 71.6% | 50 min | 1.7% | 298 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly MKE to MDW
On-time arrival % by scheduled departure hour (local time), 298 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 95.0% | 1.6% | 122 |
| 6am–7am | Limited data | 26 | |
| 7am–8am | Limited data | 1 | |
| 2pm–3pm | Limited data | 9 | |
| 4pm–5pm | 52.6% | 3.0% | 99 |
| 5pm–6pm | 35.9% | 0.0% | 41 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on MKE to MDW
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) | 69.9% | -2.6 pts | 0.0% | 94 |
| All other days | 72.5% | — | 2.5% | 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).