Best Time to Fly MKE to BWI: On-Time Stats by Hour & Airline
General Mitchell International → Baltimore/Washington International Thurgood Marshall
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 85.1% of Milwaukee (MKE) to Baltimore (BWI) flights arrived on time (826 scheduled flights). That is 7.5 points above 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 (91% on time) and June the worst month (79%).
The cancellation rate was 1.2% (US average 1.8%).
MKE to BWI 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 | 85.1% | 64 min | 1.2% | 826 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly MKE to BWI
On-time arrival % by scheduled departure hour (local time), 1,711 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 90.9% | 1.3% | 78 |
| 6am–7am | 94.0% | 1.0% | 385 |
| 7am–8am | 95.5% | 1.0% | 201 |
| 8am–9am | Limited data | 16 | |
| 9am–10am | 93.2% | 1.7% | 60 |
| 10am–11am | 87.7% | 0.0% | 65 |
| 11am–12pm | 88.9% | 0.0% | 46 |
| 12pm–1pm | 91.1% | 0.6% | 159 |
| 1pm–2pm | 90.7% | 1.8% | 55 |
| 2pm–3pm | 89.2% | 0.0% | 83 |
| 3pm–4pm | 87.3% | 1.4% | 73 |
| 4pm–5pm | 80.6% | 0.9% | 105 |
| 5pm–6pm | 69.7% | 1.7% | 180 |
| 6pm–7pm | 60.7% | 4.5% | 179 |
| 7pm–8pm | Limited data | 26 | |
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 BWI
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) | 74.3% | -14.1 pts | 2.8% | 36 |
| Christmas & New Year (Dec 20 - Jan 3) | 79.2% | -9.2 pts | 2.5% | 79 |
| Summer peak (Jun 15 - Aug 15) | 79.0% | -9.5 pts | 1.9% | 360 |
| All other days | 88.4% | — | 1.3% | 1,236 |
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).