Flight number record
DL 2652
Delta Air Lines · Boston to San Antonio
- Route
- BOS → SAT
- Departs
- 09:15
- Flights
- 271
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 2652, check with Delta Air Lines.
DL 2652 lands a B, 2 points better than the national rate of 77.3%. About one flight in five arrives 15 minutes late or worse, and those flights are late by an hour and a half on average. That rests on 271 flights, with a median arrival 11 minutes early.
Key figures
On time
79.6%
Arrivals under 15 minutes late, of 265 completed flights
Avg delay
85 min
Across delayed arrivals only, not all flights
Cancelled
2.21%
National rate is 1.89%
1 hour+ late
9.4%
National rate is 8.3%
These figures cover 271 flights between September 2025 and August 2026. Beyond the headline rate, 9.4% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
Fare search by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Schedule
When DL 2652 flies
DL 2652 flies BOS to SAT without a single fixed slot. Its most common scheduled departure was 09:15, used on 75 of 271 flights, with 11:46 (53 flights) and 10:45 (31 flights) next.
- Departs 09:1575 flights27.7%
- Departs 11:4653 flights19.6%
- Departs 10:4531 flights11.4%
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 09:15 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and DL 2652 runs 4 points worse at 79.6%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
Timetable by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Against the route
DL 2652 next to BOS to SAT
Every carrier on BOS to SAT combined arrived on time 76.2% of the time across 357 flights, so DL 2652 is 3 points ahead of it. Across its whole network Delta Air Lines managed 81.1%, which this flight trails by 2 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 2652thin sample | 271 | 79.6% | 85 min | 2.21% | B |
| All Delta Air Lines on BOS–SATthin sample | 357 | 76.2% | 87 min | 2.24% | B |
| All carriers on BOS–SATthin sample | 357 | 76.2% | 87 min | 2.24% | B |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 2652 quarter by quarter
Quarter by quarter DL 2652 held fairly steady: 83.3% in Jul–Sep 2025, 73.8% in Oct–Dec 2025, 82.6% in Jan–Mar 2026 and 81.5% in Apr–Jun 2026. A spread of 10 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
- Jul–Sep 202530 flights83.3%
- Oct–Dec 202586 flights73.8%
- Jan–Mar 202688 flights82.6%
- Apr–Jun 202667 flights81.5%
Scale runs 65% to 90%.
By weekday, DL 2652 did best on Monday at 91.7% on time and worst on Sunday at 66.7%. Each day rests on about 39 flights, so a gap of 25 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 2652 runs when it is late
DL 2652 often beats the schedule: 117 of 265 completed flights, 44%, arrived 15 minutes or more early. The 54 late arrivals split 20 under half an hour, 9 between 30 and 60 minutes, and 25 an hour or more.
- 15+ min early117 flights44.2%
- Within 15 min94 flights35.5%
- 15–29 min late20 flights7.5%
- 30–59 min late9 flights3.4%
- 1–2 hours late12 flights4.5%
- 2+ hours late13 flights4.9%
Scale runs 0% to 100%.
Share of 265 completed flights by arrival against schedule.
7 of 43 late departures made up the time and arrived on time, 16% of them. In the other direction, 18 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 SAT.
The worst days
Worst days for DL 2652
The latest arrival of the period was on 28 December 2025, 6 hours 31 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 28 December 2025 | 6 hours 31 minutes | Late-arriving aircraft |
| 8 February 2026 | 6 hours 14 minutes | Carrier |
| 18 January 2026 | 4 hours 32 minutes | Carrier |
| 22 October 2025 | 3 hours 44 minutes | Late-arriving aircraft |
| 3 May 2026 | 3 hours 18 minutes | Late-arriving aircraft |
Delay causes
Why DL 2652 runs late
Carrier accounts for 52% of the 4,586 delay minutes carriers reported here, and the remaining four split what is left.
- 52%Carrier
- 34%Late-arriving aircraft
- 14%National Airspace System
- 1%Extreme weather
34% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 4,586 reported delay minutes here, that single category outweighs weather by 34 to one. The split is drawn from 4,586 delay minutes reported on DL 2652.
Cancellations sit at 2.21% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
Connections and routes
What a delay on this flight costs
9.4% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection here, and two hours if the onward flight is on a separate ticket.
At 1,764 miles this is transcontinental flying, and long routes get a quiet structural advantage. Scheduled block time on a flight this length carries more padding in absolute minutes, so a twenty-minute late departure often still becomes an on-time arrival. Read the on-time rate here as slightly flattering next to a short-haul route with the same operational quality.
The same number turns up on two other city pairs in the data, including SFO to SLC (67) and SAT to BOS (11), but none flew often enough under DL 2652 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to BOS to SAT only.
One caution: this is a thin sample. 271 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.
What to do with this
Booking DL 2652
For a booking, read DL 2652 as 79.6% on time with 2.21% cancelled over 271 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- Boston Logan International (BOS) delay statistics
- San Antonio International (SAT) 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.