About 1 in 11 DL 1427 flights from Raleigh arrived 15+ minutes late, diverted or cancelled over the past year (9%); 2.5% were cancelled. The typical flight landed 8 minutes early.
DL 1427: RDU → DTW
Scheduled to leave Raleigh at 9:51 a.m. local time. Over the past year it arrived on time 91% of the time (243 flights), in line with other DL flights on the route at that hour (90%). Last seen in the data Aug 30, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 44 | 89% |
| Tuesday | 39 | 92% |
| Wednesday | 39 | 97% |
| Thursday | 40 | 90% |
| Friday | 39 | 90% |
| Saturday | 1 | — |
| Sunday | 41 | 88% |
Why it was late
All flights RDU → DTW · Connecting off DL 1427? Check the risk
DL 1427: DTW → RDU
Scheduled to leave Detroit at 7:05 a.m. local time. Over the past year it arrived on time 92% of the time (243 flights), in line with other DL flights on the route at that hour (91%). Last seen in the data Aug 30, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 44 | 93% |
| Tuesday | 39 | 95% |
| Wednesday | 39 | 95% |
| Thursday | 40 | 88% |
| Friday | 39 | 92% |
| Saturday | 1 | — |
| Sunday | 41 | 88% |
Why it was late
All flights DTW → RDU · Connecting off DL 1427? Check the risk
Questions
How often is DL 1427 from RDU to DTW late?
Delta Air Lines 1427 from Raleigh/Durham, NC to Detroit, MI arrived 15 or more minutes late, was diverted or was cancelled on 9% of 243 scheduled flights between September 2025 and August 2026. 2.5% were cancelled.
How often is DL 1427 from DTW to RDU late?
Delta Air Lines 1427 from Detroit, MI to Raleigh/Durham, NC arrived 15 or more minutes late, was diverted or was cancelled on 8% of 243 scheduled flights between September 2025 and August 2026. 2.5% 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.