Flight number record
DL 2785
Delta Air Lines · Boston to Charleston
- Route
- BOS → CHS
- Departs
- 12:55
- Flights
- 335
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 2785, check with Delta Air Lines.
DL 2785 lands a B−, about a point worse than the national rate of 77.3%. About one flight in four arrives 15 minutes late or worse, and those flights are late by a little over an hour on average. That rests on 335 flights, with a median arrival 4 minutes early.
Key figures
On time
76.2%
Arrivals under 15 minutes late, of 323 completed flights
Avg delay
70 min
Across delayed arrivals only, not all flights
Cancelled
3.28%
National rate is 1.89%
1 hour+ late
8.4%
National rate is 8.3%
These figures cover 335 flights between September 2025 and August 2026. Beyond the headline rate, 8.4% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When DL 2785 flies
DL 2785 flies BOS to CHS without a single fixed slot. Its most common scheduled departure was 12:55, used on 57 of 335 flights, with 12:50 (39 flights) and 11:45 (34 flights) next.
- Departs 12:5557 flights17.0%
- Departs 12:5039 flights11.6%
- Departs 11:4534 flights10.1%
Scale runs 0% to 100%.
Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.
A 12:55 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.3%, and DL 2785 runs 2 points worse at 76.2%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
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Against the route
DL 2785 next to BOS to CHS
Every carrier on BOS to CHS combined arrived on time 76.5% of the time across 1,149 flights, so DL 2785 is about level with it. Across its whole network Delta Air Lines managed 81.1%, which this flight trails by 5 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 2785thin sample | 335 | 76.2% | 70 min | 3.28% | B− |
| All Delta Air Lines on BOS–CHS | 370 | 76.2% | 71 min | 3.24% | B− |
| All carriers on BOS–CHS | 1,149 | 76.5% | 70 min | 2.70% | B |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 2785 quarter by quarter
DL 2785 did not run the same all year. Its best quarter was Apr–Jun 2026 at 88.4% on time and its weakest Oct–Dec 2025 at 67.5%, a swing of 21 points on roughly 67 flights a quarter. The twelve-month rate averages over that, so if you are flying in a weak quarter the quarter's own figure is the better guide.
- Jul–Sep 202530 flights80.0%
- Oct–Dec 202580 flights67.5%
- Jan–Mar 202676 flights72.9%
- Apr–Jun 202687 flights88.4%
- Jul–Sep 202662 flights71.9%
Scale runs 60% to 95%.
By weekday, DL 2785 did best on Tuesday at 83.7% on time and worst on Sunday at 64.4%. Each day rests on about 48 flights, so a gap of 19 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 2785 runs when it is late
DL 2785 often beats the schedule: 83 of 323 completed flights, 26%, arrived 15 minutes or more early. The 77 late arrivals split 27 under half an hour, 23 between 30 and 60 minutes, and 27 an hour or more.
- 15+ min early83 flights25.7%
- Within 15 min163 flights50.5%
- 15–29 min late27 flights8.4%
- 30–59 min late23 flights7.1%
- 1–2 hours late13 flights4.0%
- 2+ hours late14 flights4.3%
Scale runs 0% to 100%.
Share of 323 completed flights by arrival against schedule.
12 of 67 late departures made up the time and arrived on time, 18% of them. In the other direction, 22 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at CHS.
The worst days
Worst days for DL 2785
The latest arrival of the period was on 24 November 2025, 8 hours 32 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 24 November 2025 | 8 hours 32 minutes | Carrier |
| 20 March 2026 | 4 hours 38 minutes | Carrier |
| 19 December 2025 | 4 hours 13 minutes | Late-arriving aircraft |
| 15 December 2025 | 3 hours 47 minutes | Late-arriving aircraft |
| 28 January 2026 | 2 hours 57 minutes | Carrier |
Delay causes
Why DL 2785 runs late
Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 5,415 reported delay minutes.
- 41%Carrier
- 34%Late-arriving aircraft
- 23%National Airspace System
- 2%Extreme weather
The largest share of delay minutes, 41%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 2,245 of the 5,415 delay minutes reported here. The split is drawn from 5,415 delay minutes reported on DL 2785.
Cancellations run at 3.28%, against 1.89% nationally. That is about one flight in 30 cancelled outright. A cancelled flight is invisible in every on-time figure on this page, so the punctuality numbers above describe only the flights that actually operated.
Connections and routes
What a delay on this flight costs
8.4% of arrivals land an hour or more late, close to the national 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last a little over an hour, which a normal layover absorbs.
The 818 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty.
DL 2785 is not only a BOS to CHS flight. It also flew CHS to BOS (294 flights, 63.3% on time) often enough to be scored on its own. Airlines attach one number to several legs of an aircraft's day, and each leg keeps its own record here, so check which city pair is on your booking before reading a rate.
One caution: this is a thin sample. 335 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.
| Also flown as | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| CHS to BOSthin sample | 294 | 63.3% | 110 min | 4.42% | D− |
What to do with this
Booking DL 2785
For a booking, the cancellation rate is the figure to plan around on DL 2785: 3.28% of its 335 scheduled flights did not operate. A late arrival costs a little over an hour, but a cancellation costs the day, so leave a later option open.
Related
Where to go next
- BOS to CHS, every carrier and departure
- CHS to BOS, the return direction
- Boston Logan International (BOS) delay statistics
- Charleston International (CHS) delay statistics
- Delta Air Lines on-time record
- Every Delta Air Lines flight number with a record
- The most and least reliable flight numbers in the US
- Why the first flight of the morning is statistically safest
A flight number here means Delta Air Lines’s own number as it reports to the DOT. How the figures are computed is on the methodology page.
Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.