About 1 in 4 DL 3986 flights from Detroit arrived 15+ minutes late, diverted or cancelled over the past year (25%); 2.4% were cancelled. The typical flight landed 10 minutes early.
DL 3986: DTW → AZO
Scheduled to leave Detroit at 10:05 a.m. local time, operated by SkyWest as OO 3986. Over the past year it arrived on time 75% of the time (329 flights), in line with other DL flights on the route at that hour (77%). Last seen in the data Aug 31, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 49 | 76% |
| Tuesday | 47 | 70% |
| Wednesday | 47 | 74% |
| Thursday | 47 | 77% |
| Friday | 47 | 72% |
| Saturday | 45 | 71% |
| Sunday | 47 | 83% |
Why it was late
All flights DTW → AZO · Connecting off DL 3986? Check the risk
DL 3986: AZO → DTW
Scheduled to leave Kalamazoo at 11:41 a.m. local time, operated by SkyWest as OO 3986. Over the past year it arrived on time 74% of the time (329 flights), in line with other DL flights on the route at that hour (73%). Last seen in the data Aug 31, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 49 | 69% |
| Tuesday | 47 | 72% |
| Wednesday | 47 | 77% |
| Thursday | 47 | 77% |
| Friday | 47 | 74% |
| Saturday | 45 | 76% |
| Sunday | 47 | 77% |
Why it was late
All flights AZO → DTW · Connecting off DL 3986? Check the risk
Questions
How often is DL 3986 from DTW to AZO late?
Delta Air Lines 3986 from Detroit, MI to Kalamazoo, MI arrived 15 or more minutes late, was diverted or was cancelled on 25% of 329 scheduled flights between September 2025 and August 2026. 2.4% were cancelled.
How often is DL 3986 from AZO to DTW late?
Delta Air Lines 3986 from Kalamazoo, MI to Detroit, MI arrived 15 or more minutes late, was diverted or was cancelled on 26% of 329 scheduled flights between September 2025 and August 2026. 2.7% were cancelled.
Flight numbers change. Figures cover flights with this airline, number and route only. "Likely range" is the 95% interval for the true on-time rate given the number of flights. This is history, not live status: check Delta Air Lines for today's flight. Method.