FlightRecord

Austin Straubel International Airport (GRB): Delays & On-Time Performance

Data through July 2026

Austin Straubel International Airport (GRB) is a tale of two seasons: departures ran 91% on-time in October 2024 but sank to 68% in December 2025. Across the year it averages 82% against a national 78%, over roughly 13 departures a day to 17 destinations.

Departures on-time
82%
left <15 min late
Avg dep delay
18 min
Arrivals on-time
74%
Cancelled
2.1%
Destinations
17
nonstop
Airlines
6

Plan your departure from GRB

The choices most likely to improve your odds, based on this airport’s historical record.

Best departure time
Around 6 a.m.
92% on-time
Best day to fly
Tuesday
82% on-time
Most reliable airline here
Republic Airways
90% on-time from GRB
Cancellation risk
2.1%
above the US average
Check routes from GRB ↓Compare nearby airports ↓

Monthly on-time trend

Monthly departure on-time percentage at GRB50%75%100%August 2024: 81% on-time (381 flights)81Aug 2024September 2024: 85% on-time (403 flights)85October 2024: 91% on-time (370 flights)91November 2024: 82% on-time (296 flights)82Nov 2024December 2024: 76% on-time (269 flights)76January 2025: 79% on-time (284 flights)79February 2025: 77% on-time (225 flights)77Feb 2025March 2025: 81% on-time (304 flights)81April 2025: 89% on-time (365 flights)89May 2025: 89% on-time (419 flights)89May 2025June 2025: 85% on-time (438 flights)85July 2025: 75% on-time (343 flights)75August 2025: 82% on-time (341 flights)82Aug 2025September 2025: 83% on-time (291 flights)83October 2025: 90% on-time (412 flights)90November 2025: 85% on-time (460 flights)85Nov 2025December 2025: 68% on-time (412 flights)68January 2026: 74% on-time (343 flights)74February 2026: 82% on-time (347 flights)82Feb 2026March 2026: 73% on-time (490 flights)73April 2026: 82% on-time (520 flights)82May 2026: 83% on-time (433 flights)83May 2026June 2026: 88% on-time (399 flights)88July 2026: 88% on-time (376 flights)88

Best time of day to depart from GRB

On-time percentage by scheduled departure hour at GRB5 a.m.: 90% on-time (918 flights)56 a.m.: 92% on-time (1,763 flights)67 a.m.: 88% on-time (616 flights)78 a.m.: 87% on-time (351 flights)89 a.m.: 84% on-time (288 flights)910 a.m.: 81% on-time (692 flights)1011 a.m.: 80% on-time (811 flights)1112 p.m.: 85% on-time (618 flights)121 p.m.: 74% on-time (309 flights)132 p.m.: 74% on-time (147 flights)143 p.m.: 75% on-time (440 flights)154 p.m.: 75% on-time (761 flights)165 p.m.: 70% on-time (1,048 flights)176 p.m.: 71% on-time (335 flights)18scheduled departure hour

By day of week

DayOn-timeAvg delay
Monday80%20 min
Tuesdaybest82%19 min
Wednesday80%17 min
Thursday77%21 min
Friday74%22 min
Saturday80%17 min
Sunday77%20 min

Next: compare the busiest routes from GRB ↓

Busiest routes from GRB

RouteFlights/12moOn-timeAvg delay
GRB → ORD (Chicago)2,69874%22 min
GRB → DTW (Detroit)87583%17 min
GRB → MSP (Minneapolis)86783%18 min
GRB → ATL (Atlanta)36687%15 min

Compare airlines departing GRB ↓

Where flights into GRB come from

RouteFlights/12moOn-timeAvg delay
ORD (Chicago) → GRB2,69872%22 min
DTW (Detroit) → GRB87574%24 min
MSP (Minneapolis) → GRB86981%18 min
ATL (Atlanta) → GRB36674%15 min

Most reliable routes

  1. GRB → ATL87%
  2. GRB → DTW83%
  3. GRB → MSP83%
  4. GRB → ORD74%

Most delay-prone routes

  1. GRB → ORD74%
  2. GRB → MSP83%
  3. GRB → DTW83%
  4. GRB → ATL87%

What causes delays at GRB

Share of total delay minutes by cause, as reported by carriers to the US DOT, weighted across routes departing GRB.

  • Late-arriving aircraft24%
  • Airline operations44%
  • National airspace system17%
  • Weather15%

Alternative airports near Green Bay

Other airports within 120 miles, compared on departure reliability.

AirportDistanceOn-time departuresAvg delay
ATW — Appleton International Airport25 mi81%20 min
CWA — Central Wisconsin Airport78 mi84%14 min
IMT — Ford Airport92 mi78%29 min
ESC — Delta County Airport100 mi88%21 min
RHI — Rhinelander Oneida County Airport103 mi86%15 min

Compare the airport-level record first, then check the exact route you plan to book.

Airline performance at GRB

AirlineOn-time departuresAvg delayFlights
Republic Airways90%8 min264
Delta Air Lines87%15 min967
Envoy Air82%13 min1,934
SkyWest Airlines81%20 min5,992

Frequently asked questions

How often are flights delayed at GRB?
18% of departures from Austin Straubel International Airport left 15+ minutes late between 2024-07 and 2026-07, with an average departure delay of 18 minutes. The national on-time average over the same period was 78%.
What is the best time of day to depart from GRB?
Flights scheduled around 6 a.m. depart on time 92% of the time at GRB, versus 70% around 5 p.m.. Booking before noon is the usual rule of thumb here.
What is the worst month for delays at GRB?
In this dataset, December 2025 was the weakest month at GRB, with 68% of departures on time.
How often are flights cancelled at GRB?
2.1% of scheduled departures from GRB were cancelled in this period, compared with a national rate of 1.6%.

Popular route pages from this airport

Related guides

Based on 9,206 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.