FlightRecord

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

Data through May 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
80% 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%June 2024: 78% on-time (373 flights)78Jun 2024July 2024: 80% on-time (285 flights)80August 2024: 81% on-time (381 flights)81September 2024: 85% on-time (403 flights)85Sep 2024October 2024: 91% on-time (370 flights)91November 2024: 82% on-time (296 flights)82December 2024: 76% on-time (269 flights)76Dec 2024January 2025: 79% on-time (284 flights)79February 2025: 77% on-time (225 flights)77March 2025: 81% on-time (304 flights)81Mar 2025April 2025: 89% on-time (365 flights)89May 2025: 89% on-time (419 flights)89June 2025: 85% on-time (438 flights)85Jun 2025July 2025: 75% on-time (343 flights)75August 2025: 82% on-time (341 flights)82September 2025: 83% on-time (291 flights)83Sep 2025October 2025: 90% on-time (412 flights)90November 2025: 85% on-time (460 flights)85December 2025: 68% on-time (412 flights)68Dec 2025January 2026: 74% on-time (343 flights)74February 2026: 82% on-time (347 flights)82March 2026: 73% on-time (490 flights)73Mar 2026April 2026: 82% on-time (520 flights)82May 2026: 83% on-time (433 flights)83

Best time of day to depart from GRB

On-time percentage by scheduled departure hour at GRB5 a.m.: 90% on-time (885 flights)56 a.m.: 92% on-time (1,649 flights)67 a.m.: 89% on-time (640 flights)78 a.m.: 87% on-time (344 flights)89 a.m.: 82% on-time (233 flights)910 a.m.: 81% on-time (722 flights)1011 a.m.: 78% on-time (769 flights)1112 p.m.: 85% on-time (494 flights)121 p.m.: 75% on-time (287 flights)132 p.m.: 72% on-time (131 flights)143 p.m.: 74% on-time (430 flights)154 p.m.: 74% on-time (748 flights)165 p.m.: 70% on-time (1,094 flights)176 p.m.: 67% on-time (268 flights)18scheduled departure hour

By day of week

DayOn-timeAvg delay
Monday79%20 min
Tuesdaybest80%20 min
Wednesday79%19 min
Thursday76%22 min
Friday73%22 min
Saturday79%17 min
Sunday76%20 min

Next: compare the busiest routes from GRB ↓

Busiest routes from GRB

RouteFlights/12moOn-timeAvg delay
GRB → ORD (Chicago)2,84073%22 min
GRB → DTW (Detroit)80182%18 min
GRB → MSP (Minneapolis)78881%19 min
GRB → ATL (Atlanta)36687%15 min

Compare airlines departing GRB ↓

Where flights into GRB come from

RouteFlights/12moOn-timeAvg delay
ORD (Chicago) → GRB2,84071%23 min
DTW (Detroit) → GRB80073%24 min
MSP (Minneapolis) → GRB78979%19 min
ATL (Atlanta) → GRB36675%15 min

Most reliable routes

  1. GRB → ATL87%
  2. GRB → DTW82%
  3. GRB → MSP81%
  4. GRB → ORD73%

Most delay-prone routes

  1. GRB → ORD73%
  2. GRB → MSP81%
  3. GRB → DTW82%
  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 operations43%
  • National airspace system18%
  • Weather14%

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 mi83%15 min
IMT — Ford Airport92 mi78%30 min
ESC — Delta County Airport100 mi87%22 min
RHI — Rhinelander Oneida County Airport103 mi85%16 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 min936
Envoy Air81%13 min1,741
SkyWest Airlines80%21 min5,802

Frequently asked questions

How often are flights delayed at GRB?
19% of departures from Austin Straubel International Airport left 15+ minutes late between 2024-06 and 2026-05, 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 67% around 6 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 8,804 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.