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

Seattle, WA (SEA) to Kansas City, MO (MCI) flight delay odds

Historically, 76.6% of scheduled reportable flights on this direction arrived on time in July 2025–June 2026. The sample includes 1,131 flights.

HISTORICAL ROUTE SIGNALGenerally reliable
76.6%arrived on time
13.2%30+ min late
0.9%cancelled
1,131scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late6.3%all scheduled flights
120+ minutes late1.7%all scheduled flights
Diverted0.6%did not reach as scheduled
Average arrival+3.8 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
Early morning20292.6%3.0%0.0%
Late morning15874.7%14.6%0.6%
Afternoon15275.0%13.8%0.0%
Evening61872.2%16.0%1.5%

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
Monday16678.3%11.4%0.0%
Tuesday15578.7%11.6%0.6%
Wednesday15381.7%10.5%0.0%
Thursday16575.8%12.7%0.6%
Friday17572.6%18.3%1.7%
Saturday14676.7%13.0%2.1%
Sunday17173.1%14.0%1.2%

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
Alaska Airlines74578.5%11.8%0.5%
Delta Air Lines36474.5%14.8%1.6%
Southwest Airlines2245.5%31.8%0.0%

Monthly trend

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

MonthFlightsOn time30+ minCancelled
July 202512755.9%25.2%0.0%
August 202512168.6%19.8%0.8%
September 202511171.2%17.1%0.9%
October 20258873.9%15.9%2.3%
November 20257979.7%12.7%0.0%
December 20258572.9%16.5%2.4%
January 20266783.6%7.5%1.5%
February 20265685.7%8.9%1.8%
March 20267584.0%5.3%1.3%
April 20269092.2%2.2%0.0%
May 202610985.3%4.6%0.9%
June 202612381.3%12.2%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.

Airline49.9%
Late aircraft31.2%
National airspace16.0%
Weather2.8%
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.