About 1 in 3 DL 5840 flights from Boston arrived 15+ minutes late, diverted or cancelled over the past year (37%); 11.6% were cancelled. The typical flight landed 6 minutes early.
DL 5840: BOS → LGA
Scheduled to leave Boston at 10:00 p.m. local time, operated by Republic Airways as YX 5840. Over the past year it arrived on time 63% of the time (121 flights), in line with other DL flights on the route at that hour (65%). Last seen in the data Aug 31, 2026.
Usually Delta Air Lines's last flight of the day from Boston to New York (61% of days). Delta Air Lines's last BOS–LGA flight was cancelled 7.7% of the time, against 6.7% for its earlier ones. If it's cancelled, the next Delta Air Lines flight is usually around 6:00 a.m. the next morning.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 21 | 81% |
| Tuesday | 20 | 70% |
| Wednesday | 20 | 60% |
| Thursday | 20 | 35% |
| Friday | 20 | 70% |
| Sunday | 20 | 60% |
Why it was late
All flights BOS → LGA · Connecting off DL 5840? Check the risk
Questions
How often is DL 5840 from BOS to LGA late?
Delta Air Lines 5840 from Boston, MA to New York, NY arrived 15 or more minutes late, was diverted or was cancelled on 37% of 121 scheduled flights between September 2025 and August 2026. 11.6% 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.