Route on-time record
DTW to GSP: most on-time flights and the best time to fly
Detroit (Detroit Metropolitan Wayne County Airport) to Greenville/Greer/Spartanburg (Greenville-Spartanburg International Airport). 639 nonstop flights in Jun 2025 to May 2026, 74% arrived within 15 minutes and 2.2% were cancelled. The most reliable flight number was Delta 1017 at 9:16 AM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
DTW → GSP
Detroit to Greenville/Greer/Spartanburg: 639 nonstop flights a year
On time (12 months)
74%
Cancelled
2.2%
avg delay 22 min
Best time to leave
Before 9 AM
78% on time vs 70% 3 to 6 PM
Most reliable airline
Delta
74% 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 · Delta 1017
9:16 AM → 10:55 AM1h 39m nonstop
Local times, typical schedule. Last flown 2026-05-31.
79%
chance on time
- On time (history)
- 84%
- Cancelled
- 0.0%
- Avg arrival delay
- 11 min
- Arrived on time 84% of the time (25 flights, Jun 2025 to May 2026).
- Departs outside DTW's trouble window (1 PM to 7 PM, when 64% of its 28 ground stops and delay programs started).
- Short track record (25 flights), so its score leans on the airline's record at this hour.
Limited track record · 25 flights
Find Delta 1017 fares Opens this date on Aviasales#2 · Delta 733
4:00 PM → 5:40 PM1h 40m nonstop
Local times, typical schedule. Last flown 2026-05-06.
76%
chance on time
- On time (history)
- 90%
- Cancelled
- 0.0%
- Avg arrival delay
- 5 min
- Arrived on time 90% of the time (21 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (3 to 6 PM: 70% on time; Before 9 AM: 78%).
- Departs inside DTW's trouble window: 64% of its 28 ground stops and delay programs started between 1 PM and 7 PM.
- Short track record (21 flights), so its score leans on the airline's record at this hour.
Limited track record · 21 flights
Find Delta 733 fares Opens this date on Aviasales#3 · Delta 1561
7:59 PM → 9:38 PM1h 39m nonstop
Local times, typical schedule. Last flown 2026-05-31.
72%
chance on time
- On time (history)
- 71%
- Cancelled
- 4.0%
- Avg arrival delay
- 39 min
- Arrived on time 71% of the time (24 flights, Jun 2025 to May 2026).
- Departs outside DTW's trouble window (1 PM to 7 PM, when 64% of its 28 ground stops and delay programs started).
- Short track record (24 flights), so its score leans on the airline's record at this hour.
Limited track record · 24 flights
Find Delta 1561 fares Opens this date on Aviasales#4 · Delta 402
3:50 PM → 5:29 PM1h 39m nonstop
Local times, typical schedule. Last flown 2026-04-12.
69%
chance on time
- On time (history)
- 67%
- Cancelled
- 3.2%
- Avg arrival delay
- 20 min
- Arrived on time 67% of the time (30 flights, Jun 2025 to May 2026).
- Cancelled 3.2% of the time (1 of 31).
- Leaves in this route's least on-time window (3 to 6 PM: 70% on time; Before 9 AM: 78%).
- Departs inside DTW's trouble window: 64% of its 28 ground stops and delay programs started between 1 PM and 7 PM.
Limited track record · 30 flights
Find Delta 402 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- Delta Air Lines74%
387 flights · 76% on time as flown · 2.1% cancel
- SkyWest Airlines (sold as United Express, Delta Connection, American Eagle or Alaska)70%
252 flights · 71% on time as flown · 2.3% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM78%
105 flights · avg delay 15 min
- 3 to 6 PM70%
267 flights · avg delay 26 min
- 6 to 9 PM75%
236 flights · avg delay 22 min
Best day: Saturday (82%). Worst: Monday (77%).
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)55%
- Late-arriving aircraft22%
- Severe weather11%
- Air traffic control and airport volume11%
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
DTW to GSP questions
- What time of day is best to fly DTW to GSP?
- Before 9 AM: 78% of flights arrived on time, against 70% for departures 3 to 6 PM. Later flights inherit delays from earlier ones, so the first departures of the day usually run best.
- Which airline is most on time from DTW to GSP?
- Delta, with a season-adjusted 74% chance of operating and arriving on time over 387 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 DTW to GSP?
- January (64% on time); the best was October (93%), 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 DTW
- GSP to DTW (return)
- DTW to ORD 72%
- DTW to ATL 78%
- DTW to LGA 75%
- DTW to MCO 75%
- DTW to EWR 75%
- DTW to CLT 84%
- DTW to DFW 76%
- DTW to DEN 79%
- DTW to DCA 68%
- DTW to PHL 79%
- DTW to LAS 77%
- DTW to FLL 72%
Live status: FAA delays and ground stops