BTS DATA COMPLETE THROUGH JUNE 2026HISTORICAL ODDS · NOT LIVE FLIGHT STATUS
DelayOddsKnow the route before you book
MCIBOS

Kansas City, MO (MCI) to Boston, MA (BOS) flight delay odds

Historically, 72.5% of scheduled reportable flights on this direction arrived on time in July 2025–June 2026. The sample includes 615 flights.

HISTORICAL ROUTE SIGNALVariable
72.5%arrived on time
19.2%30+ min late
2.6%cancelled
615scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late12.5%all scheduled flights
120+ minutes late5.9%all scheduled flights
Diverted0.0%did not reach as scheduled
Average arrival+14.5 mincompleted flights

When is this route most reliable?

The same route can behave differently through the day. These are scheduled departure windows, not actual departure times. Small time windows with fewer than 40 flights are withheld.

Departure windowFlightsOn time30+ minCancelled
Late morning25379.8%15.0%0.8%
Afternoon11670.7%20.7%6.0%
Evening24665.9%22.8%2.8%

Weekday comparison

Day-of-week results use at least 30 scheduled flights per row. Look for broad patterns, not tiny percentage differences.

DayFlightsOn time30+ minCancelled
Monday9671.9%20.8%4.2%
Tuesday9479.8%14.9%1.1%
Wednesday9080.0%12.2%2.2%
Thursday9268.5%22.8%3.3%
Friday9171.4%23.1%0.0%
Saturday5969.5%13.6%6.8%
Sunday9365.6%24.7%2.2%

Airline comparison

Marketing-carrier results make codeshare flights easier to compare as travelers buy them. Dedicated route-airline reports require at least 160 flights.

AirlineFlightsOn time30+ minCancelled
Republic Airways33479.0%12.0%3.3%
Delta Air Lines25465.7%26.4%2.0%
Southwest Airlines2755.6%40.7%0.0%

Monthly trend

Month-by-month results show whether a twelve-month average hides an unusual period.

MonthFlightsOn time30+ minCancelled
July 20255673.2%17.9%1.8%
August 20255683.9%7.1%1.8%
September 20255549.1%38.2%1.8%
October 20255750.9%31.6%5.3%
November 20255366.0%22.6%3.8%
December 20254173.2%22.0%2.4%
January 20263366.7%18.2%9.1%
February 20262885.7%3.6%10.7%
March 20265284.6%7.7%1.9%
April 20265180.4%15.7%0.0%
May 20265791.2%7.0%0.0%
June 20267671.1%27.6%0.0%

What drove reported delay minutes?

BTS cause minutes are reported for qualifying delayed flights. These shares describe recorded delay minutes—not the chance that a particular cause will affect your next flight.

Airline45.9%
Late aircraft33.8%
National airspace17.4%
Weather2.9%
Security0.0%
This is historical evidence, not a forecast.

Weather, schedules and operations change. For a trip you have already booked, use the airline or airport for live status.