BOS to MCI flight delays
Boston, MA (BOS) Kansas City, MO (MCI) · 1,256 miles
615 flights · January 2025 – August 2026 · US Bureau of Transportation Statistics
78.76%
Arrived on time
Within 15 minutes of schedule
2.11%
Cancelled
Share of scheduled flights
59 min
When late, late by
Average across delayed arrivals
13 min
Delay per flight
Averaged over every flight flown
What the record says about this route
The season swings this route hard. In August it ran 24.7 points more punctual than in June — a difference bigger than the one between the best and worst airlines on most routes. If the date is flexible, it is worth more than the carrier.
The 2 airlines here are separated by under 6 points — close enough to call a tie. Choose on price and departure time.
The Boston to Kansas City route sits close to the middle of the record — neither notably punctual nor notably late.
Which airline should you fly on this route?
Over January 2025 – August 2026, Republic Airways arrived on time most often on BOS to MCI. Delta Air Lines was late most often. Flights ran closest to schedule in August and worst in June.
Every airline on BOS to MCI
Ranked by how many flights each one operated. A carrier with fewer than 100 flights in the period is listed but not graded.
| Airline | Flights | On time | Cancelled | Avg delay | Grade |
|---|---|---|---|---|---|
| Republic Airways | 334 | 82.41% | 2.69% | 52 min | C |
| Delta Air Lines | 254 | 76.52% | 1.57% | 69 min | C |
| Southwest Airlines | 27 | 55.56% | 0% | 43 min | — |
Month by month
Share of flights that arrived within 15 minutes of schedule, by month flown.
The return leg
MCI to BOS Kansas City back to Boston 74.46% on time DOther routes from Boston
Common questions
Are flights from Boston to Kansas City usually delayed?
78.76% of flights on the BOS to MCI route arrived within 15 minutes of schedule, so roughly 2 in every ten arrived late. That is about the same as the average route in this record.
Which airline is most on time from Boston to Kansas City?
Republic Airways, at 82.41% on time across 334 flights. The least punctual on the route was Delta Air Lines at 76.52%.
How often are BOS to MCI flights cancelled?
2.11% of scheduled flights did not operate — about 21 in every thousand. That is in the normal range.
What is the best month to fly Boston to Kansas City?
August, when 92.7% of flights arrived on time. The worst was June at 68%.
When BOS to MCI flights are late, how late are they?
About 59 minutes on average across the flights that arrived more than 15 minutes behind schedule.
What these figures do and do not tell you
Everything on this page is counted from the flights that actually operated on BOS to MCI during January 2025 – August 2026, as reported by the airlines to the US Bureau of Transportation Statistics. "On time" is the federal definition: arriving at the gate within 15 minutes of the scheduled time.
A route's record is a description of the past, not a forecast. Weather, air traffic control and the aircraft's earlier flights that day drive most delays, and none of them are predictable from a historical rate. What the record does tell you is whether this route runs late more often than others, and which carrier on it has the better history — which is the part you can actually act on when you book.
Cancellations are counted separately from delays because they are a different problem for a traveller: a late flight still gets you there. How the grade is calculated →