Route on-time record
GRB to DTW: most on-time flights and the best time to fly
Green Bay (Austin Straubel International Airport) to Detroit (Detroit Metropolitan Wayne County Airport). 801 nonstop flights in Jun 2025 to May 2026, 80% arrived within 15 minutes and 2.1% were cancelled. The most reliable flight number was SkyWest 3984 at 7:00 AM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
GRB → DTW
Green Bay to Detroit: 801 nonstop flights a year
On time (12 months)
80%
Cancelled
2.1%
avg delay 23 min
Best time to leave
Before 9 AM
86% on time vs 73% 9 AM to noon
Most reliable airline
Delta
80% chance on time
Fares open on our travel partner (Aviasales). Pick the flight number you chose here.
Most reliable nonstop flights
Ranked by the chance the flight operates and arrives within 15 minutes of schedule, from Jun 2025 to May 2026 records.
#1 · SkyWest 3984 · sold as United Express, Delta Connection, American Eagle or Alaska
7:00 AM → 9:21 AM1h 20m nonstop
Local times, typical schedule. Last flown 2026-05-31.
84%
chance on time
- On time (history)
- 85%
- Cancelled
- 1.3%
- Avg arrival delay
- 18 min
- Arrived on time 85% of the time (152 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 86% on time; 9 AM to noon: 73%).
Moderate track record · 152 flights
Find 7:00 AM flight fares Opens this date on Aviasales#2 · SkyWest 3924 · sold as United Express, Delta Connection, American Eagle or Alaska
5:01 PM → 7:15 PM1h 14m nonstop
Local times, typical schedule. Last flown 2026-05-31.
77%
chance on time
- On time (history)
- 79%
- Cancelled
- 4.0%
- Avg arrival delay
- 24 min
- Arrived on time 79% of the time (24 flights, Jun 2025 to May 2026).
- Short track record (24 flights), so its score leans on the airline's record at this hour.
Limited track record · 24 flights
Find 5:01 PM flight fares Opens this date on Aviasales#3 · SkyWest 3933 · sold as United Express, Delta Connection, American Eagle or Alaska
6:12 PM → 8:32 PM1h 20m nonstop
Local times, typical schedule. Last flown 2026-05-06.
75%
chance on time
- On time (history)
- 75%
- Cancelled
- 0.0%
- Avg arrival delay
- 17 min
- Arrived on time 75% of the time (24 flights, Jun 2025 to May 2026).
- Short track record (24 flights), so its score leans on the airline's record at this hour.
Limited track record · 24 flights
Find 6:12 PM flight fares Opens this date on Aviasales#4 · Delta 1475
5:17 PM → 7:35 PM1h 18m nonstop
Local times, typical schedule. Last flown 2026-04-12.
73%
chance on time
- On time (history)
- 62%
- Cancelled
- 6.5%
- Avg arrival delay
- 24 min
- Arrived on time 62% of the time (29 flights, Jun 2025 to May 2026).
- Cancelled 6.5% of the time (2 of 31).
- 95% of its delay minutes came from the plane arriving late from an earlier flight.
- Short track record (29 flights), so its score leans on the airline's record at this hour.
Limited track record · 29 flights
Find Delta 1475 fares Opens this date on Aviasales#5 · SkyWest 4059 · sold as United Express, Delta Connection, American Eagle or Alaska
11:12 AM → 1:28 PM1h 16m nonstop
Local times, typical schedule. Last flown 2026-05-31.
72%
chance on time
- On time (history)
- 72%
- Cancelled
- 1.2%
- Avg arrival delay
- 34 min
- Arrived on time 72% of the time (165 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (9 AM to noon: 73% on time; Before 9 AM: 86%).
- Lands inside DTW's trouble window: 64% of its 28 ground stops and delay programs started between 1 PM and 7 PM.
Moderate track record · 165 flights
Find 11:12 AM flight fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- Delta Air Lines80%
187 flights · 81% on time as flown · 1.8% cancel
- SkyWest Airlines (sold as United Express, Delta Connection, American Eagle or Alaska)77%
614 flights · 79% on time as flown · 2.2% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM86%
263 flights · avg delay 19 min
- 9 AM to noon73%
243 flights · avg delay 30 min
- 3 to 6 PM79%
269 flights · avg delay 20 min
On time by month
All airlines, Jun 2023 to May 2026. Several years per month, so one stormy season doesn't define a month. Travel-month estimates use this seasonal pattern.
What delays this route
- Airline (crew, maintenance, boarding)64%
- Severe weather17%
- Late-arriving aircraft12%
- Air traffic control and airport volume8%
Share of delay minutes by the cause airlines report to the US DOT.
Historical odds, not a guarantee. Built from the US DOT Bureau of Transportation Statistics on-time reports (Jun 2025 to May 2026), FAA ground stop and delay program advisories, and 20 years of airport weather observations. Covers US airlines that report to the DOT; schedules are flights operated recently, so confirm times when you book. ATIS Alerts is not affiliated with any airline. Fares are what Aviasales travelers saw in recent searches (USD, one way, 1 adult), not live quotes; the partner site shows the current price. Fare links go to our travel partner and may earn us a commission at no cost to you. Affiliate disclosure
GRB to DTW questions
- What time of day is best to fly GRB to DTW?
- Before 9 AM: 86% of flights arrived on time, against 73% for departures 9 AM to noon. Later flights inherit delays from earlier ones, so the first departures of the day usually run best.
- Which airline is most on time from GRB to DTW?
- Delta, with a season-adjusted 80% chance of operating and arriving on time over 187 flights. The adjustment compares each airline with what the route did in the months it flew, so a carrier that skipped a stormy month gets no free credit.
- What is the worst month for delays on GRB to DTW?
- January (73% on time); the best was October (91%), averaged over Jun 2023 to May 2026.
- Is this a prediction for my flight?
- No. These are historical odds from the US DOT on-time reports, FAA advisories and airport weather records. Check your flight status and the FAA delay board on the day you fly.
More routes from GRB
Live status: FAA delays and ground stops