Boston (BOS) to Kansas City (MCI): On-Time Performance
Data through May 2026
When you fly BOS to MCI matters as much as anything else about the booking: the route swung from 93% on-time in September 2024 to just 57% in February 2025. Across the full period the route averages 81% on-time against a national 78%.
- On-time
- 81%
- arrived <15 min late
- Avg delay
- 12 min
- completed flights
- Cancelled
- 2.2%
- Flights/day
- 1.6
- last 12 months
- Duration
- 3h 40m
- scheduled
- Distance
- 1,256 mi
Best airline from BOS to MCI
3 airlines flew this route regularly between 2024-06 and 2026-05.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Spirit Airlinesmost reliable | 85% | 14 min | 5.5% | 109 |
| Republic Airways | 81% | 10 min | 2.3% | 746 |
| Delta Air Lines | 80% | 15 min | 1.1% | 441 |
Monthly on-time trend
Best time to fly from BOS to MCI
Aim for departures around 7 a.m. (92% on-time); avoid 3 p.m. departures (61%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 83% | 13 min |
| Tuesdaybest | 86% | 8 min |
| Wednesday | 79% | 12 min |
| Thursday | 81% | 13 min |
| Friday | 79% | 15 min |
| Saturday | 81% | 11 min |
| Sunday | 78% | 14 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft35%
- Airline operations38%
- National airspace system24%
- Weather2%
Frequently asked questions
- How often are flights from BOS to MCI delayed?
- 19% of BOS–MCI 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 12 minutes.
- Which airline is most reliable from BOS to MCI?
- Spirit Airlines has the best on-time record on this route at 85%, based on 109 flights. 3 airlines flew BOS–MCI frequently enough to compare in this period.
- What is the best time of day to fly from BOS to MCI?
- Departures around 7 a.m. have the best record (92% on-time), while departures around 3 p.m. have the worst (61%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from BOS to MCI?
- The scheduled BOS–MCI flight time averages 3h 40m over 1,256 miles. Actual arrival times vary — flights on this route land 15+ minutes late 19% of the time.
- How often are BOS to MCI flights cancelled?
- 2.2% 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 MCI?
- February 2025 was the roughest month in this dataset, with only 57% of arrivals on time. The best was September 2024 at 93%. If your dates are flexible, that 36-point gap is worth planning around.
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Based on 1,296 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.