Milwaukee (MKE) to Boston (BOS): On-Time Performance
Data through May 2026
Milwaukee (MKE) to Boston (BOS) effectively runs on two schedules. In March 2026, 98% of arrivals were on time; in September 2025 that fell to 47% — a 51-point seasonal swing. Across the full period the route averages 74% on-time against a national 78%.
- On-time
- 74%
- arrived <15 min late
- Avg delay
- 19 min
- completed flights
- Cancelled
- 2.0%
- Flights/day
- 2.0
- last 12 months
- Duration
- 2h 21m
- scheduled
- Distance
- 860 mi
Best airline from MKE to BOS
2 airlines flew this route regularly between 2024-06 and 2026-05.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Republic Airwaysmost reliable | 77% | 17 min | 2.5% | 1,132 |
| JetBlue Airways | 64% | 25 min | 0.3% | 346 |
Monthly on-time trend
Best time to fly from MKE to BOS
Aim for departures around 12 p.m. (86% on-time); avoid 4 p.m. departures (55%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 70% | 23 min |
| Tuesday | 77% | 15 min |
| Wednesday | 74% | 17 min |
| Thursday | 70% | 18 min |
| Friday | 72% | 21 min |
| Saturdaybest | 80% | 14 min |
| Sunday | 73% | 20 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft26%
- Airline operations22%
- National airspace system47%
- Weather5%
Frequently asked questions
- How often are flights from MKE to BOS delayed?
- 26% of MKE–BOS 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 19 minutes.
- Which airline is most reliable from MKE to BOS?
- Republic Airways has the best on-time record on this route at 77%, based on 1,132 flights. 2 airlines flew MKE–BOS frequently enough to compare in this period.
- What is the best time of day to fly from MKE to BOS?
- Departures around 12 p.m. have the best record (86% on-time), while departures around 4 p.m. have the worst (55%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from MKE to BOS?
- The scheduled MKE–BOS flight time averages 2h 21m over 860 miles. Actual arrival times vary — flights on this route land 15+ minutes late 26% of the time.
- How often are MKE to BOS 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 MKE to BOS?
- September 2025 was the roughest month in this dataset, with only 47% of arrivals on time. The best was March 2026 at 98%. If your dates are flexible, that 51-point gap is worth planning around.
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Based on 1,499 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.