General Mitchell International in September 2025

84.1%departed on time

BTS: A flight is counted as on time if it arrived less than 15 minutes after its scheduled time. Only carriers with at least 0.5 percent of domestic scheduled passenger revenue report.

In September 2025, reporting carriers scheduled 2,315 domestic departures from General Mitchell International (MKE). 84.1% left less than 15 minutes late and 82.3% reached their destination on time; 0.6% were cancelled.

Nationally that month, 83.1% of flights departed on time and 82.8% arrived on time, so MKE departures were 1.0 points above the national departure figure.

A year earlier, in September 2024, the airport had 2,396 departures with 87.6% leaving on time: a change of −3.5 points, with flights down 3%.

Flights arriving at MKE that month were on time 82.1% of the time (2,313 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 42%, national aviation system 25% and late-arriving aircraft 23%.

On time 82.3%
Arrived 15+ minutes late 16.9%
Cancelled 0.6%
Diverted 0.2%

Every scheduled departure from MKE in September 2025, judged by arrival at the destination.

September 2025 against a year earlier, the airport's year and the nation

Measure	Sep 2025	Sep 2024	MKE, 12 months to Jul 2026	All reported flights, Sep 2025
Departed on time	84.1%	87.6%	77.6%	83.1%
Arrived on time	82.3%	86.4%	76.2%	82.8%
Cancelled	0.6%	0.2%	2.3%	0.5%
Average departure delay (late minutes only)	11.3 min	9.7 min	17.8 min	12.2 min
Scheduled departures a day	77	80	80	18,748
Scheduled departures	2,315	2,396	29,355	562,439

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
WN Southwest Airlines	719	31%	86.5%	-0.5 min	0.3%
OO SkyWest Airlines	540	23%	78.3%	6.9 min	0.6%
DL Delta Air Lines	371	16%	88.7%	-8.6 min	0.0%
YX Republic Airline	187	8%	69.0%	11.0 min	2.1%
AA American Airlines	176	8%	83.5%	7.1 min	1.1%
OH PSA Airlines	128	6%	83.6%	1.3 min	0.0%
UA United Airlines	81	3%	76.5%	8.5 min	0.0%
AS Alaska Airlines	60	3%	83.3%	-3.9 min	1.7%
B6 JetBlue Airways	22	1%	50.0%	15.8 min	0.0%
NK Spirit Airlines	20	1%	90.0%	-16.6 min	5.0%
F9 Frontier Airlines	11	0%	72.7%	0.5 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
MKE–ORD	Milwaukee to Chicago	394	73.4%	12.6 min	0.8%
MKE–DEN	Milwaukee to Denver	227	82.4%	1.0 min	0.4%
MKE–ATL	Milwaukee to Atlanta	187	95.2%	-15.0 min	0.0%
MKE–MSP	Milwaukee to Minneapolis	129	77.5%	0.9 min	0.0%
MKE–DCA	Milwaukee to Washington	112	83.0%	5.1 min	0.0%
MKE–DTW	Milwaukee to Detroit	112	92.0%	-9.4 min	0.0%
MKE–PHX	Milwaukee to Phoenix	98	84.7%	0.5 min	1.0%
MKE–LAS	Milwaukee to Las Vegas	93	79.6%	-1.9 min	1.1%
MKE–DFW	Milwaukee to Dallas/Fort Worth	90	81.1%	6.9 min	2.2%
MKE–CLT	Milwaukee to Charlotte	89	85.4%	11.3 min	0.0%
MKE–EWR	Milwaukee to Newark	83	73.5%	6.5 min	3.6%
MKE–MCO	Milwaukee to Orlando	79	86.1%	-0.4 min	0.0%

By scheduled departure hour

On-time share:under 62%6270768288% and over

Share of departures that left less than 15 minutes late, by scheduled hour (local time), September 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Sep 2025	Minutes
Air carrier	41.7%	34.3%	10,390
Late-arriving aircraft	22.7%	37.4%	5,657
National Aviation System	25.1%	22.6%	6,263
Extreme weather	10.4%	5.6%	2,602
Security	0.0%	0.1%	0

24,912 delay minutes on 391 flights that arrived 15 or more minutes late and carried a cause report. Carriers assign the categories; see what each category means.

Questions and answers

How many flights left MKE on time in September 2025?

84.1% of 2,315 scheduled domestic departures left less than 15 minutes late, and 82.3% reached their destination on time. The national figures that month were 83.1% and 82.8%.

How does that compare with a year earlier?

In September 2024, 87.6% of 2,396 departures left on time and 0.2% were cancelled, against 84.1% and 0.6% in September 2025.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for September 2025; public domain. Domestic scheduled flights by reporting carriers, totals and averages only. The site's data runs through July 2026. Full record for MKE · methodology · corrections.