Best Time to Fly GRB to DTW: On-Time Stats by Hour & Airline
Green Bay Austin Straubel International → Detroit Metro Wayne County
Data through July 2026 · Last updated October 18, 2026
875 flights were scheduled from Green Bay (GRB) to Detroit (DTW) in the last 12 months, and 81.3% of those that flew arrived on time, 3.7 points above the US average of 77.6%.
Delta Air Lines was the most punctual of the 2 airlines on the route at 81.3%, while SkyWest Airlines trailed at 81.3%.
June has been the best month (94% on time) and Thursday the weakest day of the week (82%).
1.9% of flights were cancelled, versus 1.8% nationally.
GRB to DTW on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| Delta Air Lines | 81.3% | 77 min | 1.6% | 187 |
| SkyWest Airlines | 81.3% | 115 min | 2.0% | 688 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly GRB to DTW
On-time arrival % by scheduled departure hour (local time), 1,691 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 6am–7am | 94.2% | 0.0% | 103 |
| 7am–8am | 87.7% | 1.6% | 498 |
| 11am–12pm | 80.0% | 1.6% | 507 |
| 12pm–1pm | Limited data | 26 | |
| 1pm–2pm | Limited data | 2 | |
| 2pm–3pm | Limited data | 18 | |
| 4pm–5pm | 75.5% | 2.0% | 50 |
| 5pm–6pm | 80.5% | 0.7% | 452 |
| 6pm–7pm | 80.0% | 0.0% | 35 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on GRB to DTW
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | 75.0% | -8.4 pts | 5.3% | 38 |
| Christmas & New Year (Dec 20 - Jan 3) | 77.6% | -5.8 pts | 4.3% | 70 |
| Summer peak (Jun 15 - Aug 15) | 87.8% | +4.4 pts | 0.0% | 172 |
| All other days | 83.4% | — | 1.1% | 1,411 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).