About 1 in 4 DL 5151 flights from New York arrived 15+ minutes late, diverted or cancelled over the past year (22%); 4.4% were cancelled. The typical flight landed 16 minutes early.
DL 5151: JFK → BGR
Scheduled to leave New York at 12:50 p.m. local time, operated by Endeavor Air as 9E 5151. Over the past year it arrived on time 78% of the time (364 flights), in line with other DL flights on the route at that hour (78%). Last seen in the data Aug 31, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 53 | 70% |
| Tuesday | 52 | 77% |
| Wednesday | 52 | 85% |
| Thursday | 51 | 82% |
| Friday | 52 | 90% |
| Saturday | 52 | 71% |
| Sunday | 52 | 69% |
Why it was late
All flights JFK → BGR · Connecting off DL 5151? Check the risk
DL 5151: BGR → JFK
Scheduled to leave Bangor at 4:22 p.m. local time, operated by Endeavor Air as 9E 5151. Over the past year it arrived on time 72% of the time (302 flights), in line with other DL flights on the route at that hour (72%). Last seen in the data Aug 31, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 44 | 57% |
| Tuesday | 43 | 74% |
| Wednesday | 43 | 84% |
| Thursday | 42 | 79% |
| Friday | 43 | 74% |
| Saturday | 43 | 63% |
| Sunday | 44 | 75% |
Why it was late
All flights BGR → JFK · Connecting off DL 5151? Check the risk
Questions
How often is DL 5151 from JFK to BGR late?
Delta Air Lines 5151 from New York, NY to Bangor, ME arrived 15 or more minutes late, was diverted or was cancelled on 22% of 364 scheduled flights between September 2025 and August 2026. 4.4% were cancelled.
How often is DL 5151 from BGR to JFK late?
Delta Air Lines 5151 from Bangor, ME to New York, NY arrived 15 or more minutes late, was diverted or was cancelled on 28% of 302 scheduled flights between September 2025 and August 2026. 3.6% 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.