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

Seattle, WA (SEA) to Milwaukee, WI (MKE) flight delay odds

84.3% of 509 official scheduled SEA-to-MKE flights arrived on time; 7.3% arrived at least 30 minutes late and 0.2% were cancelled during July 2025–June 2026.

Source: U.S. Bureau of Transportation Statistics · Reporting window: July 2025–June 2026 · Updated September 16, 2026

HISTORICAL ROUTE SIGNALLower disruption
84.3%arrived on time
7.3%30+ min late
0.2%cancelled
509scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late2.9%all scheduled flights
120+ minutes late0.2%all scheduled flights
Diverted0.4%did not reach as scheduled
Average arrival-4.0 mincompleted flights

Which departure time was most reliable for SEA to MKE?

Among qualifying SEA-to-MKE departure window results, Early morning had the highest on-time rate: 92.4% of 225 flights. Evening was lowest at 74.7% across 170 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning22592.4%3.6%0.0%
Late morning11482.5%6.1%0.9%
Evening17074.7%12.9%0.0%

Which weekday was most reliable for SEA to MKE?

Among qualifying SEA-to-MKE weekday results, Wednesday had the highest on-time rate: 89.7% of 68 flights. Sunday was lowest at 76.9% across 78 flights.

DayFlightsOn time30+ minCancelled
Monday7982.3%10.1%1.3%
Tuesday6586.2%9.2%0.0%
Wednesday6889.7%4.4%0.0%
Thursday7788.3%2.6%0.0%
Friday7787.0%5.2%0.0%
Saturday6580.0%12.3%0.0%
Sunday7876.9%7.7%0.0%

Which airline was most reliable for SEA to MKE?

Only Alaska Airlines met the SEA-to-MKE airline threshold: 84.3% of 509 scheduled flights arrived on time during July 2025–June 2026.

AirlineFlightsOn time30+ minCancelled
Alaska Airlines50984.3%7.3%0.2%

Which month was most reliable for SEA to MKE?

Among qualifying SEA-to-MKE month results, April 2026 had the highest on-time rate: 97.2% of 36 flights. December 2025 was lowest at 78.6% across 42 flights.

MonthFlightsOn time30+ minCancelled
July 20256178.7%13.1%0.0%
August 20256280.6%11.3%0.0%
September 20256080.0%5.0%0.0%
October 20253397.0%0.0%0.0%
November 20253378.8%6.1%0.0%
December 20254278.6%14.3%0.0%
January 20262479.2%16.7%0.0%
February 20261888.9%0.0%0.0%
March 20262688.5%3.8%3.8%
April 20263697.2%0.0%0.0%
May 20265585.5%7.3%0.0%
June 20265988.1%3.4%0.0%

What drove SEA to MKE delay minutes?

Airline was the largest recorded SEA-to-MKE delay category, accounting for 39.7% of 2,871 BTS-attributed delay minutes during July 2025–June 2026.

Airline39.7%
Late aircraft36.9%
National airspace23.2%
Weather0.0%
Security0.2%
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.