Flight number record
DL 1152
Delta Air Lines · Philadelphia to Atlanta
- Route
- PHL → ATL
- Departs
- 06:45
- Flights
- 363
- Period
- July 2025 to June 2026
Historical statistics for July 2025 to June 2026, not live status. For today’s DL 1152, check with Delta Air Lines.
DL 1152 earns an A. Close to nine flights in ten arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 12 points better than the national rate of 77.6%. When something does go wrong the average delay runs roughly 50 minutes. That rests on 363 flights, with a median arrival 10 minutes early.
Set against the rest of the country, DL 1152's record is 12 points better than the US average of 77.6%. That gap is worth roughly 123 fewer late arrivals for every thousand flights.
Key figures
On time
89.9%
Arrivals under 15 minutes late, of 355 completed flights
Avg delay
49 min
Across delayed arrivals only, not all flights
Cancelled
1.65%
National rate is 1.81%
1 hour+ late
2.8%
National rate is 8.1%
These figures cover 363 flights between July 2025 and June 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.
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 115 of 363 flights, with 06:55 (62 flights) and 07:00 (43 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.
- Departs 06:45115 flights31.7%
- Departs 06:5562 flights17.1%
- Departs 07:0043 flights11.8%
Scale runs 0% to 100%. Rows with fewer than 30 flights show a dash.
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 level with that at 89.9%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
Against the route
DL 1152 next to PHL to ATL
Every carrier on PHL to ATL combined arrived on time 79.2% of the time across 5,713 flights, so DL 1152 is 11 points ahead of it. Delta flew 3,029 flights on the same city pair under all its flight numbers, including this one, and those ran 84.9% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight beats by 8 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 1152thin sample | 363 | 89.9% | 49 min | 1.65% | A |
| All Delta Air Lines on PHL–ATL | 3,029 | 84.9% | 59 min | 2.48% | B |
| All carriers on PHL–ATL | 5,713 | 79.2% | 66 min | 2.73% | B |
| Delta Air Lines, whole network | 1,038,570 | 81.6% | 71 min | 1.62% | 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 Oct–Dec 2025 at 83.0%, a swing of 11 points on roughly 91 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 202592 flights92.3%
- Oct–Dec 202590 flights83.0%
- Jan–Mar 202690 flights89.7%
- Apr–Jun 202691 flights94.4%
Scale runs 75% to 100%. Rows with fewer than 30 flights show a dash.
By weekday, DL 1152 did best on Wednesday at 98.1% on time and worst on Sunday at 84.6%. Each day rests on about 52 flights, so a gap of 14 points is worth noticing but could still narrow in another year.
Delay causes
Why DL 1152 runs late
One category carries most of the weight here. National Airspace System accounts for 53% of the 1,761 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.
- 53%National Airspace System
- 46%Carrier
- 1%Extreme weather
53% of delay minutes are charged to the National Airspace System: air traffic volume, runway configuration, ground stops. No carrier can price its way out of that, which is why airport choice moves the number here more than carrier choice does. That is 927 minutes out of 1,761, against a national NAS share of 21%. The split is drawn from 1,761 delay minutes reported on DL 1152.
Cancellations sit at 1.65% against a national 1.81%, which is ordinary. Diversions add another 0.55%.
Connections and routes
What a delay on this flight costs
Badly late arrivals are rare here: only 2.8% land an hour or more behind schedule, against 8.1% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.
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. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.
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 89.9% on time with 1.65% 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 route88.2%
- Delta Air Lines 1180 on the same route88.0%
- Delta Air Lines 1269 on the same route91.4%
- Frontier Airlines 2551 on the same route70.6%
- Delta Air Lines 1169 on the same route75.4%
- Delta Air Lines 1100 on the same route87.6%
- 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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.