Green Bay (GRB) to Atlanta (ATL): On-Time Performance
Data through May 2026
The calendar drives reliability on GRB–ATL. September 2025 flights landed on schedule 100% of the time, but December 2025 dropped to 70% — a gap of 30 points. Across the full period the route averages 87% on-time against a national 78%.
- On-time
- 87%
- arrived <15 min late
- Avg delay
- 15 min
- completed flights
- Cancelled
- 1.5%
- Flights/day
- 1.0
- last 12 months
- Duration
- 2h 20m
- scheduled
- Distance
- 774 mi
Monthly on-time trend
Best time to fly from GRB to ATL
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 83% | 19 min |
| Tuesdaybest | 91% | 5 min |
| Wednesday | 88% | 9 min |
| Thursday | 87% | 19 min |
| Friday | 82% | 24 min |
| Saturday | 88% | 16 min |
| Sunday | 87% | 11 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft9%
- Airline operations64%
- National airspace system20%
- Weather7%
Frequently asked questions
- How often are flights from GRB to ATL delayed?
- 14% of GRB–ATL flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-06 and 2026-05. The average arrival delay across completed flights was 15 minutes.
- How long is the flight from GRB to ATL?
- The scheduled GRB–ATL flight time averages 2h 20m over 774 miles. Actual arrival times vary — flights on this route land 15+ minutes late 14% of the time.
- How often are GRB to ATL flights cancelled?
- 1.5% of scheduled flights on this route were cancelled between 2024-06 and 2026-05, at or below the national rate of 1.6%.
- What is the worst month to fly from GRB to ATL?
- December 2025 was the roughest month in this dataset, with only 70% of arrivals on time. The best was September 2025 at 100%. If your dates are flexible, that 30-point gap is worth planning around.
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Based on 737 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.