Boston (BOS) to Milwaukee (MKE): On-Time Performance
Data through May 2026
Boston (BOS) to Milwaukee (MKE) effectively runs on two schedules. In February 2026, 96% of arrivals were on time; in December 2025 that fell to 66% — a 30-point seasonal swing. Across the full period the route averages 83% on-time against a national 78%. Morning departures also hold up better than evening ones (89% vs 75%), which matters most in the rough months.
- On-time
- 83%
- arrived <15 min late
- Avg delay
- 11 min
- completed flights
- Cancelled
- 2.0%
- Flights/day
- 2.0
- last 12 months
- Duration
- 2h 44m
- scheduled
- Distance
- 860 mi
Best airline from BOS to MKE
2 airlines flew this route regularly between 2024-06 and 2026-05.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Republic Airwaysmost reliable | 84% | 10 min | 2.5% | 1,131 |
| JetBlue Airways | 81% | 14 min | 0.3% | 345 |
Monthly on-time trend
Best time to fly from BOS to MKE
Aim for departures around 9 a.m. (91% on-time); avoid 5 p.m. departures (71%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 81% | 14 min |
| Tuesday | 84% | 11 min |
| Wednesday | 85% | 10 min |
| Thursday | 83% | 9 min |
| Friday | 78% | 13 min |
| Saturdaybest | 87% | 8 min |
| Sunday | 83% | 13 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft36%
- Airline operations44%
- National airspace system20%
- Weather1%
Frequently asked questions
- How often are flights from BOS to MKE delayed?
- 17% of BOS–MKE flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-06 and 2026-05. The average arrival delay across completed flights was 11 minutes.
- Which airline is most reliable from BOS to MKE?
- Republic Airways has the best on-time record on this route at 84%, based on 1,131 flights. 2 airlines flew BOS–MKE frequently enough to compare in this period.
- What is the best time of day to fly from BOS to MKE?
- Departures around 9 a.m. have the best record (91% on-time), while departures around 5 p.m. have the worst (71%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from BOS to MKE?
- The scheduled BOS–MKE flight time averages 2h 44m over 860 miles. Actual arrival times vary — flights on this route land 15+ minutes late 17% of the time.
- How often are BOS to MKE flights cancelled?
- 2% of scheduled flights on this route were cancelled between 2024-06 and 2026-05, slightly above the national rate of 1.6%.
- What is the worst month to fly from BOS to MKE?
- December 2025 was the roughest month in this dataset, with only 66% of arrivals on time. The best was February 2026 at 96%. If your dates are flexible, that 30-point gap is worth planning around.
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Based on 1,498 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.