Best Time to Fly BOS to MKE: On-Time Stats by Hour & Airline
Logan International → General Mitchell International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 82.7% of Boston (BOS) to Milwaukee (MKE) flights arrived on time (741 scheduled flights). That is 5.1 points above the national average of 77.6%.
JetBlue was the most punctual of the 2 airlines on the route at 87.8%, while Republic Airways trailed at 82.2%.
January has been the best month (93% on time) and Friday the weakest day of the week (80%).
3.1% of flights were cancelled, versus 1.8% nationally.
BOS 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 |
|---|---|---|---|---|
| JetBlue | 87.8% | 64 min | 0.0% | 172 |
| Republic Airways | 82.2% | 56 min | 4.0% | 545 |
| Delta Air Lines | Limited data | 24 | ||
80%+ good 70–79.9% fair <70% poor
Best time of day to fly BOS to MKE
On-time arrival % by scheduled departure hour (local time), 1,496 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 6am–7am | Limited data | 21 | |
| 7am–8am | 92.9% | 0.0% | 85 |
| 8am–9am | Limited data | 1 | |
| 9am–10am | 90.8% | 0.9% | 450 |
| 10am–11am | 89.2% | 1.3% | 75 |
| 11am–12pm | 81.9% | 0.0% | 72 |
| 1pm–2pm | 77.6% | 1.5% | 68 |
| 2pm–3pm | 79.5% | 0.0% | 122 |
| 3pm–4pm | 89.1% | 0.0% | 46 |
| 4pm–5pm | 78.7% | 4.9% | 203 |
| 5pm–6pm | 70.0% | 3.1% | 228 |
| 6pm–7pm | Limited data | 6 | |
| 7pm–8pm | Limited data | 17 | |
| 8pm–9pm | 91.5% | 5.9% | 101 |
| 9pm–10pm | Limited data | 1 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on BOS 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) | Limited data | 25 | ||
| Christmas & New Year (Dec 20 - Jan 3) | 86.7% | +2.7 pts | 0.0% | 30 |
| Summer peak (Jun 15 - Aug 15) | 82.1% | -1.9 pts | 2.3% | 343 |
| All other days | 84.0% | — | 2.0% | 1,098 |
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).