MCI to BOS flight delays & on-time performance
Nonstop flights from Kansas City International Airport to Boston Logan International Airport · 1,256 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at MCI or BOS right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Kansas City (MCI) to Boston (BOS) arrived on time 73% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 2.8% were cancelled, and 12% arrived an hour or more late.
- Republic Airways was the most punctual airline here (83% on time); Southwest Airlines was the least (46%).
- Departures scheduled around 9am did best (83% on time); around 10am did worst (57%).
- Wednesday was the most reliable day to fly (84% on time) and Sunday the least (68%).
- The largest source of delay minutes was airline (crew, maintenance, cleaning, fueling) (43%).
Which airline is most on time from MCI to BOS?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| Republic AirwaysRegional airline operating flights for American Eagle, Delta Connection and United Express. | 83% | 3.6% | 16 min | 6.3% | 278 |
| Delta Air Lines | 69% | 2.6% | 35 min | 16.5% | 311 |
| Southwest Airlines | 46% | 0.0% | 34 min | 19.3% | 57 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 9am83%214 flights
- 10am57%21 flights
- 11am68%31 flights
- 12pm62%27 flights
- 1pm92%14 flights
- 2pm66%97 flights
- 6pm61%93 flights
- 7pm76%140 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday72%4.0% cancelled
- Tuesday75%1.0% cancelled
- Wednesday84%3.2% cancelled
- Thursday71%2.1% cancelled
- Friday70%0.0% cancelled
- Saturday71%6.5% cancelled
- Sunday68%4.1% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Airline (crew, maintenance, cleaning, fueling)43%
- Late-arriving aircraft35%
- Air traffic control & airport congestion20%
- Extreme weather2%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Airline (crew, maintenance, cleaning, fueling)61%
- Extreme weather22%
- Air traffic control & airport congestion17%
- Security0%
MCI to BOS: common questions
- How often are MCI to BOS flights on time?
- 73% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from Kansas City to Boston cancelled?
- 2.8% of scheduled flights were cancelled (18 of 646).
- How long are typical delays?
- Across all flights the average arrival delay was 27 min (early arrivals count as zero). Flights that were late arrived 96 min behind schedule on average, and 12.4% of flights were an hour or more late.
- How long is taxi time at MCI?
- Flights on this route spent 16 min taxiing from the gate to takeoff on average.
Related routes
Return trip: BOS to MCI — 78% on time
More flights from Kansas City
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: MCI → BOS, nonstop flights by US airlines that report to the DOT. How we calculate this.