Flight number record
DL 1152
Delta Air Lines · Philadelphia to Atlanta
- Route
- PHL → ATL
- Departs
- 06:45
- Flights
- 363
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 1152, check with Delta Air Lines.
DL 1152 earns an A. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 9 points better than the national rate of 77.3%. When something does go wrong the average delay runs about an hour. That rests on 363 flights, with a median arrival 10 minutes early.
Set against the rest of the country, DL 1152's record is 9 points better than the US average of 77.3%. That gap is worth roughly 85 fewer late arrivals for every thousand flights.
Key figures
On time
85.8%
Arrivals under 15 minutes late, of 352 completed flights
Avg delay
63 min
Across delayed arrivals only, not all flights
Cancelled
2.48%
National rate is 1.89%
1 hour+ late
5.4%
National rate is 8.3%
These figures cover 363 flights between September 2025 and August 2026. The median arrival is 10 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.
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Schedule
When DL 1152 flies
DL 1152 flies PHL to ATL without a single fixed slot. Its most common scheduled departure was 06:45, used on 64 of 363 flights, with 06:55 (62 flights) and 06:25 (49 flights) next.
- Departs 06:4564 flights17.6%
- Departs 06:5562 flights17.1%
- Departs 06:2549 flights13.5%
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 06:45 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and DL 1152 runs 4 points worse at 85.8%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
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Against the route
DL 1152 next to PHL to ATL
Every carrier on PHL to ATL combined arrived on time 78.0% of the time across 5,793 flights, so DL 1152 is 8 points ahead of it. Delta flew 3,022 flights on the same city pair under all its flight numbers, including this one, and those ran 83.2% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight beats by 5 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 1152thin sample | 363 | 85.8% | 63 min | 2.48% | A |
| All Delta Air Lines on PHL–ATL | 3,022 | 83.2% | 70 min | 3.11% | B− |
| All carriers on PHL–ATL | 5,793 | 78.0% | 71 min | 3.11% | B− |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 1152 quarter by quarter
DL 1152 did not run the same all year. Its best quarter was Apr–Jun 2026 at 94.4% on time and its weakest Jul–Sep 2026 at 67.2%, a swing of 27 points on roughly 73 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 flights93.3%
- Oct–Dec 202590 flights83.0%
- Jan–Mar 202690 flights89.7%
- Apr–Jun 202691 flights94.4%
- Jul–Sep 202662 flights67.2%
Scale runs 60% to 100%.
By weekday, DL 1152 did best on Wednesday at 92.3% on time and worst on Monday at 78.4%. Each day rests on about 52 flights, so a gap of 14 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 1152 runs when it is late
DL 1152 often beats the schedule: 135 of 352 completed flights, 38%, arrived 15 minutes or more early. The 50 late arrivals split 20 under half an hour, 11 between 30 and 60 minutes, and 19 an hour or more.
- 15+ min early135 flights38.4%
- Within 15 min167 flights47.4%
- 15–29 min late20 flights5.7%
- 30–59 min late11 flights3.1%
- 1–2 hours late14 flights4.0%
- 2+ hours late5 flights1.4%
Scale runs 0% to 100%.
Share of 352 completed flights by arrival against schedule.
A late pushback is often recovered here: of 37 departures that left 15 minutes late or more, 12 still arrived on time. In the other direction, 25 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 ATL.
The worst days
Worst days for DL 1152
The latest arrival of the period was on 12 July 2026, 5 hours 48 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). Three of the five worst days fell in July 2026.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 12 July 2026 | 5 hours 48 minutes | Carrier |
| 19 July 2026 | 3 hours 30 minutes | Carrier |
| 22 July 2026 | 3 hours 25 minutes | Carrier |
| 21 May 2026 | 3 hours 4 minutes | Carrier |
| 29 August 2026 | 2 hours 5 minutes | Carrier |
Delay causes
Why DL 1152 runs late
Carrier accounts for 68% of the 3,157 delay minutes carriers reported here, and the remaining four split what is left.
- 68%Carrier
- 31%National Airspace System
- 1%Extreme weather
The largest share of delay minutes, 68%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 2,155 of the 3,157 delay minutes reported here. The split is drawn from 3,157 delay minutes reported on DL 1152.
Cancellations sit at 2.48% against a national 1.89%, which is ordinary. Diversions add another 0.55%.
Connections and routes
What a delay on this flight costs
5.4% 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 about an hour, which a normal layover absorbs.
The 666 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.
Every one of the 363 flights under DL 1152 in the data flew PHL to ATL. The number was not reused on any other city pair, which makes this a clean record of one route.
One caution: this is a thin sample. 363 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 1152
For a booking, read DL 1152 as 85.8% on time with 2.48% cancelled over 363 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- PHL to ATL, every carrier and departure
- ATL to PHL, the return direction
- Delta Air Lines 2270 on the same route87.3%
- Frontier Airlines 2551 on the same route73.0%
- Delta Air Lines 1180 on the same route85.0%
- Delta Air Lines 1269 on the same route90.4%
- Delta Air Lines 1100 on the same route83.9%
- Delta Air Lines 1169 on the same route77.9%
- Philadelphia International (PHL) delay statistics
- Hartsfield-Jackson Atlanta International (ATL) 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
- Worst months to fly in the US, ranked by the data
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.