Kansas City (MCI) to Boston (BOS): On-Time Performance
Data through July 2026
The calendar drives reliability on MCI–BOS. January 2025 flights landed on schedule 97% of the time, but September 2025 dropped to 50% — a gap of 47 points. Across the full period the route averages 78% on-time against a national 78%. Morning departures also hold up better than evening ones (82% vs 73%), which matters most in the rough months.
- On-time
- 78%
- arrived <15 min late
- Avg delay
- 19 min
- completed flights
- Cancelled
- 2.6%
- Flights/day
- 1.8
- last 12 months
- Duration
- 3h 6m
- scheduled
- Distance
- 1,256 mi
Best airline from MCI to BOS
3 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Republic Airwaysmost reliable | 82% | 14 min | 2.9% | 716 |
| Spirit Airlines | 75% | 14 min | 6.5% | 108 |
| Delta Air Lines | 75% | 26 min | 1.7% | 523 |
Monthly on-time trend
Best time to fly from MCI to BOS
Aim for departures around 9 a.m. (84% on-time); avoid 6 p.m. departures (64%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 75% | 23 min |
| Tuesdaybest | 83% | 17 min |
| Wednesday | 83% | 12 min |
| Thursday | 75% | 20 min |
| Friday | 74% | 20 min |
| Saturday | 77% | 20 min |
| Sunday | 77% | 24 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 operations40%
- National airspace system22%
- Weather2%
Frequently asked questions
- How often are flights from MCI to BOS delayed?
- 23% of MCI–BOS flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 19 minutes.
- Which airline is most reliable from MCI to BOS?
- Republic Airways has the best on-time record on this route at 82%, based on 716 flights. 3 airlines flew MCI–BOS frequently enough to compare in this period.
- What is the best time of day to fly from MCI to BOS?
- Departures around 9 a.m. have the best record (84% on-time), while departures around 6 p.m. have the worst (64%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from MCI to BOS?
- The scheduled MCI–BOS flight time averages 3h 6m over 1,256 miles. Actual arrival times vary — flights on this route land 15+ minutes late 23% of the time.
- How often are MCI to BOS flights cancelled?
- 2.6% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, slightly above the national rate of 1.6%.
- What is the worst month to fly from MCI to BOS?
- September 2025 was the roughest month in this dataset, with only 50% of arrivals on time. The best was January 2025 at 97%. If your dates are flexible, that 47-point gap is worth planning around.
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Based on 1,404 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.