Best Time to Fly MKE to ORD: On-Time Stats by Hour & Airline
General Mitchell International → Chicago O'Hare International
Data through July 2026 · Last updated October 18, 2026
5,268 flights were scheduled from Milwaukee (MKE) to Chicago (ORD) in the last 12 months, and 68.5% of those that flew arrived on time, 9.2 points below the US average of 77.6%.
Republic Airways was the most punctual of the 3 airlines on the route at 75.5%, while SkyWest Airlines trailed at 68.3%.
September has been the best month (76% on time) and Friday the weakest day of the week (65%).
4.5% of flights were cancelled, versus 1.8% nationally.
MKE to ORD 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 |
|---|---|---|---|---|
| Republic Airways | 75.5% | 82 min | 7.0% | 114 |
| Envoy Air | 69.7% | 74 min | 5.4% | 129 |
| SkyWest Airlines | 68.3% | 92 min | 4.3% | 4,999 |
| PSA Airlines | Limited data | 26 | ||
80%+ good 70–79.9% fair <70% poor
Best time of day to fly MKE to ORD
On-time arrival % by scheduled departure hour (local time), 8,642 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 12am–1am | Limited data | 1 | |
| 5am–6am | 84.7% | 1.9% | 909 |
| 6am–7am | 77.6% | 1.8% | 993 |
| 7am–8am | 75.2% | 2.2% | 685 |
| 8am–9am | 71.0% | 2.6% | 1,045 |
| 9am–10am | 71.7% | 4.2% | 265 |
| 10am–11am | 76.8% | 2.7% | 776 |
| 11am–12pm | 75.3% | 1.6% | 383 |
| 12pm–1pm | 64.8% | 3.1% | 486 |
| 1pm–2pm | 69.2% | 2.6% | 580 |
| 2pm–3pm | 65.1% | 3.8% | 453 |
| 3pm–4pm | 65.4% | 3.8% | 610 |
| 4pm–5pm | 66.9% | 4.0% | 277 |
| 5pm–6pm | 51.2% | 4.8% | 708 |
| 6pm–7pm | 53.5% | 8.4% | 263 |
| 7pm–8pm | 43.1% | 11.7% | 163 |
| 8pm–9pm | 57.1% | 0.0% | 42 |
| 9pm–10pm | Limited data | 3 | |
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 ORD
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) | 57.2% | -14.4 pts | 15.5% | 155 |
| Christmas & New Year (Dec 20 - Jan 3) | 68.3% | -3.4 pts | 1.5% | 269 |
| Summer peak (Jun 15 - Aug 15) | 66.4% | -5.2 pts | 3.2% | 1,585 |
| All other days | 71.7% | — | 2.9% | 6,633 |
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).