Best Time to Fly MCI to BOS: On-Time Stats by Hour & Airline
Kansas City International → Logan International
Data through July 2026 · Last updated October 18, 2026
646 flights were scheduled from Kansas City (MCI) to Boston (BOS) in the last 12 months, and 72.8% of those that flew arrived on time, 4.9 points below the US average of 77.6%.
Republic Airways was the most punctual of the 3 airlines on the route at 83.2%, while Southwest Airlines trailed at 45.6%.
February has been the best month (88% on time) and Thursday the weakest day of the week (74%).
2.8% of flights were cancelled, versus 1.8% nationally.
MCI to BOS 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 |
|---|---|---|---|---|
| Republic Airways | 83.2% | 91 min | 3.6% | 278 |
| Delta Air Lines | 68.7% | 111 min | 2.6% | 311 |
| Southwest Airlines | 45.6% | 61 min | 0.0% | 57 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly MCI to BOS
On-time arrival % by scheduled departure hour (local time), 1,328 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 9am–10am | 85.0% | 2.1% | 334 |
| 10am–11am | 80.5% | 1.1% | 181 |
| 11am–12pm | 76.0% | 0.0% | 96 |
| 12pm–1pm | 65.6% | 3.0% | 33 |
| 1pm–2pm | Limited data | 21 | |
| 2pm–3pm | 73.9% | 4.4% | 160 |
| 4pm–5pm | Limited data | 14 | |
| 5pm–6pm | Limited data | 12 | |
| 6pm–7pm | 64.4% | 2.9% | 104 |
| 7pm–8pm | 75.8% | 2.7% | 373 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on MCI to BOS
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 | 23 | ||
| Christmas & New Year (Dec 20 - Jan 3) | 88.2% | +9.7 pts | 1.9% | 52 |
| Summer peak (Jun 15 - Aug 15) | 73.0% | -5.6 pts | 3.5% | 284 |
| All other days | 78.5% | — | 2.3% | 969 |
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).