Best Time to Fly BWI to MKE: On-Time Stats by Hour & Airline
Baltimore/Washington International Thurgood Marshall → General Mitchell International
Data through July 2026 · Last updated October 18, 2026
830 flights were scheduled from Baltimore (BWI) to Milwaukee (MKE) in the last 12 months, and 76.2% of those that flew arrived on time, 1.4 points below the US average of 77.6%.
Southwest Airlines was the only reporting airline with regular flights on this route.
September has been the best month (89% on time) and Sunday the weakest day of the week (71%).
2.0% of flights were cancelled, versus 1.8% nationally.
BWI 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 | 76.2% | 54 min | 2.0% | 830 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly BWI to MKE
On-time arrival % by scheduled departure hour (local time), 1,714 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 6am–7am | Limited data | 10 | |
| 7am–8am | Limited data | 16 | |
| 8am–9am | 93.6% | 0.9% | 317 |
| 9am–10am | 85.1% | 0.0% | 134 |
| 10am–11am | 88.5% | 0.7% | 140 |
| 11am–12pm | 80.7% | 3.4% | 59 |
| 12pm–1pm | 83.3% | 3.2% | 31 |
| 1pm–2pm | Limited data | 8 | |
| 2pm–3pm | 83.8% | 1.5% | 132 |
| 3pm–4pm | 76.4% | 0.0% | 123 |
| 4pm–5pm | 60.0% | 0.0% | 35 |
| 5pm–6pm | 69.8% | 0.0% | 43 |
| 6pm–7pm | 47.5% | 9.1% | 44 |
| 7pm–8pm | 65.8% | 0.0% | 77 |
| 8pm–9pm | 75.9% | 2.2% | 136 |
| 9pm–10pm | 65.0% | 1.7% | 238 |
| 10pm–11pm | 53.3% | 2.9% | 171 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on BWI to MKE
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) | 66.7% | -13.7 pts | 2.7% | 37 |
| Christmas & New Year (Dec 20 - Jan 3) | 72.7% | -7.6 pts | 2.5% | 79 |
| Summer peak (Jun 15 - Aug 15) | 65.6% | -14.7 pts | 1.9% | 360 |
| All other days | 80.3% | — | 1.3% | 1,238 |
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).