Green Bay Austin Straubel International in September 2025

82.8%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 291 domestic departures from Green Bay Austin Straubel International (GRB). 82.8% left less than 15 minutes late and 79.7% reached their destination on time; 0.7% were cancelled.

Nationally that month, 83.1% of flights departed on time and 82.8% arrived on time, so GRB departures were level with the national departure figure.

A year earlier, in September 2024, the airport had 403 departures with 85.1% leaving on time: a change of −2.3 points, with flights down 28%.

Flights arriving at GRB that month were on time 81.7% of the time (289 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 36%, late-arriving aircraft 30% and extreme weather 18%.

On time 79.7%
Arrived 15+ minutes late 19.6%
Cancelled 0.7%
Diverted 0.0%

Every scheduled departure from GRB 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	GRB, 12 months to Jul 2026	All reported flights, Sep 2025
Departed on time	82.8%	85.1%	78.7%	83.1%
Arrived on time	79.7%	85.6%	74.5%	82.8%
Cancelled	0.7%	0.0%	3.3%	0.5%
Average departure delay (late minutes only)	8.3 min	8.5 min	19.8 min	12.2 min
Scheduled departures a day	10	13	13	18,748
Scheduled departures	291	403	4,824	562,439

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
OO SkyWest Airlines	135	46%	70.4%	6.1 min	0.7%
MQ Envoy Air	102	35%	82.4%	-0.9 min	1.0%
DL Delta Air Lines	52	18%	98.1%	-14.6 min	0.0%
YX Republic Airline	2	1%	100.0%	-2.5 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
GRB–ORD	Green Bay to Chicago	195	79.5%	1.5 min	1.0%
GRB–MSP	Green Bay to Minneapolis	40	55.0%	12.1 min	0.0%
GRB–ATL	Green Bay to Atlanta	30	100.0%	-14.2 min	0.0%
GRB–DTW	Green Bay to Detroit	24	95.8%	-15.5 min	0.0%
GRB–DCA	Green Bay to Washington	2	100.0%	-2.5 min	0.0%

By scheduled departure hour

100

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	35.5%	34.3%	946
Late-arriving aircraft	30.1%	37.4%	802
National Aviation System	16.9%	22.6%	451
Extreme weather	17.5%	5.6%	466
Security	0.0%	0.1%	0

2,665 delay minutes on 57 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 GRB on time in September 2025?

82.8% of 291 scheduled domestic departures left less than 15 minutes late, and 79.7% 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, 85.1% of 403 departures left on time and 0.0% were cancelled, against 82.8% and 0.7% 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 GRB · methodology · corrections.