Route on-time record
STL to DTW: most on-time flights and the best time to fly
St Louis (St. Louis Lambert International Airport) to Detroit (Detroit Metropolitan Wayne County Airport). 1,908 nonstop flights in Jun 2025 to May 2026, 83% arrived within 15 minutes and 1.0% were cancelled. The most reliable flight number was Delta 1626 at 6:32 AM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
STL → DTW
St Louis to Detroit: 1,908 nonstop flights a year
On time (12 months)
83%
Cancelled
1.0%
avg delay 16 min
Best time to leave
Before 9 AM
94% on time vs 71% 6 to 9 PM
Most reliable airline
Delta
87% 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 1626
6:32 AM → 9:07 AM1h 34m nonstop
Local times, typical schedule. Last flown 2026-05-31.
92%
chance on time
- On time (history)
- 94%
- Cancelled
- 2.0%
- Avg arrival delay
- 7 min
- Arrived on time 94% of the time (340 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 94% on time; 6 to 9 PM: 71%).
Strong track record · 340 flights
Find Delta 1626 fares Opens this date on Aviasales#2 · Delta 2868
10:19 AM → 12:50 PM1h 31m nonstop
Local times, typical schedule. Last flown 2026-05-31.
91%
chance on time
- On time (history)
- 93%
- Cancelled
- 1.2%
- Avg arrival delay
- 10 min
- Arrived on time 93% of the time (242 flights, Jun 2025 to May 2026).
Strong track record · 242 flights
Find Delta 2868 fares Opens this date on Aviasales#3 · Delta 1371
1:59 PM → 4:33 PM1h 34m nonstop
Local times, typical schedule. Last flown 2026-05-31.
87%
chance on time
- On time (history)
- 85%
- Cancelled
- 0.0%
- Avg arrival delay
- 11 min
- Arrived on time 85% of the time (20 flights, Jun 2025 to May 2026).
- Lands inside DTW's trouble window: 64% of its 28 ground stops and delay programs started between 1 PM and 7 PM.
- 59% of its delay minutes came from the plane arriving late from an earlier flight.
- Short track record (20 flights), so its score leans on the airline's record at this hour.
Limited track record · 20 flights
Find Delta 1371 fares Opens this date on Aviasales#4 · Delta 2822
6:04 PM → 8:37 PM1h 33m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Delta 2821, 1620; its record covers all of them.
81%
chance on time
- On time (history)
- 80%
- Cancelled
- 2.2%
- Avg arrival delay
- 18 min
- Arrived on time 80% of the time (135 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (6 to 9 PM: 71% on time; Before 9 AM: 94%).
- 60% of its delay minutes came from the plane arriving late from an earlier flight.
Moderate track record · 135 flights
Find Delta 2822 fares Opens this date on Aviasales#5 · SkyWest 3854 · sold as United Express, Delta Connection, American Eagle or Alaska
1:46 PM → 4:22 PM1h 36m nonstop
Local times, typical schedule. Last flown 2026-05-06.
80%
chance on time
- On time (history)
- 90%
- Cancelled
- 0.0%
- Avg arrival delay
- 15 min
- Arrived on time 90% of the time (21 flights, Jun 2025 to May 2026).
- Lands 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 1:46 PM flight fares Opens this date on Aviasales#6 · Southwest 1926
11:50 AM → 2:20 PM1h 30m nonstop
Local times, typical schedule. Last flown 2026-05-31.
79%
chance on time
- On time (history)
- 85%
- Cancelled
- 0.0%
- Avg arrival delay
- 12 min
- Arrived on time 85% of the time (54 flights, Jun 2025 to May 2026).
- Never cancelled in 54 scheduled flights.
- Lands inside DTW's trouble window: 64% of its 28 ground stops and delay programs started between 1 PM and 7 PM.
- Short track record (54 flights), so its score leans on the airline's record at this hour.
Limited track record · 54 flights
Find Southwest 1926 fares Opens this date on Aviasales#7 · Southwest 4340
10:20 AM → 12:50 PM1h 30m nonstop
Local times, typical schedule. Last flown 2026-04-06.
78%
chance on time
- On time (history)
- 78%
- Cancelled
- 0.0%
- Avg arrival delay
- 11 min
- Arrived on time 78% of the time (23 flights, Jun 2025 to May 2026).
- 58% of its delay minutes came from the plane arriving late from an earlier flight.
- Short track record (23 flights), so its score leans on the airline's record at this hour.
Limited track record · 23 flights
Find Southwest 4340 fares Opens this date on Aviasales#8 · SkyWest 3739 · sold as United Express, Delta Connection, American Eagle or Alaska
1:39 PM → 4:14 PM1h 35m nonstop
Local times, typical schedule. Last flown 2026-04-09.
77%
chance on time
- On time (history)
- 77%
- Cancelled
- 0.0%
- Avg arrival delay
- 22 min
- Arrived on time 77% of the time (26 flights, Jun 2025 to May 2026).
- Lands inside DTW's trouble window: 64% of its 28 ground stops and delay programs started between 1 PM and 7 PM.
- Short track record (26 flights), so its score leans on the airline's record at this hour.
Limited track record · 26 flights
Find 1:39 PM flight fares Opens this date on Aviasales#9 · SkyWest 3863 · sold as United Express, Delta Connection, American Eagle or Alaska
10:50 AM → 1:19 PM1h 29m nonstop
Local times, typical schedule. Last flown 2026-04-12.
76%
chance on time
- On time (history)
- 75%
- Cancelled
- 0.0%
- Avg arrival delay
- 23 min
- Arrived on time 75% of the time (36 flights, Jun 2025 to May 2026).
- Never cancelled in 36 scheduled flights.
- Lands inside DTW's trouble window: 64% of its 28 ground stops and delay programs started between 1 PM and 7 PM.
- Short track record (36 flights), so its score leans on the airline's record at this hour.
Limited track record · 36 flights
Find 10:50 AM flight fares Opens this date on Aviasales#10 · Southwest 140
7:40 PM → 10:10 PM1h 30m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Southwest 1874; its record covers all of them.
59%
chance on time
- On time (history)
- 57%
- Cancelled
- 1.1%
- Avg arrival delay
- 26 min
- Arrived on time 57% of the time (87 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (6 to 9 PM: 71% on time; Before 9 AM: 94%).
- 57% of its delay minutes came from the plane arriving late from an earlier flight.
Moderate track record · 87 flights
Find Southwest 140 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- Delta Air Lines87%
1,082 flights · 89% on time as flown · 1.3% cancel
- Spirit Airlines82%
48 flights · 83% on time as flown · 1.3% cancel
- SkyWest Airlines (sold as United Express, Delta Connection, American Eagle or Alaska)75%
191 flights · 72% on time as flown · 1.0% cancel
- Southwest Airlines75%
585 flights · 75% on time as flown · 0.5% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM94%
468 flights · avg delay 7 min
- 9 AM to noon83%
501 flights · avg delay 17 min
- Noon to 3 PM81%
221 flights · avg delay 18 min
- 3 to 6 PM83%
256 flights · avg delay 14 min
- 6 to 9 PM71%
462 flights · avg delay 22 min
Best day: Saturday (88%). Worst: Monday (83%).
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)44%
- Late-arriving aircraft40%
- Severe weather9%
- Air traffic control and airport volume7%
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
STL to DTW questions
- What time of day is best to fly STL to DTW?
- Before 9 AM: 94% of flights arrived on time, against 71% for departures 6 to 9 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 STL to DTW?
- Delta, with a season-adjusted 87% chance of operating and arriving on time over 1,082 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 STL to DTW?
- July (76% on time); the best was September (90%), 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 STL
- DTW to STL (return)
- STL to ATL 85%
- STL to DEN 75%
- STL to ORD 71%
- STL to LGA 75%
- STL to MCO 78%
- STL to DCA 73%
- STL to DFW 74%
- STL to PHX 76%
- STL to LAS 79%
- STL to DAL 77%
- STL to MSP 80%
- STL to CLT 83%
Live status: FAA delays and ground stops