Flight number record
DL 1180
Delta Air Lines · Philadelphia to Atlanta
- Route
- PHL → ATL
- Departs
- 08:00
- Flights
- 304
- Period
- July 2025 to June 2026
Historical statistics for July 2025 to June 2026, not live status. For today’s DL 1180, check with Delta Air Lines.
DL 1180 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 10 points better than the national rate of 77.6%. When something does go wrong the average delay runs a little over an hour. That rests on 304 flights, with a median arrival 13 minutes early.
Set against the rest of the country, DL 1180's record is 10 points better than the US average of 77.6%. That gap is worth roughly 104 fewer late arrivals for every thousand flights.
Key figures
On time
88.0%
Arrivals under 15 minutes late, of 299 completed flights
Avg delay
81 min
Across delayed arrivals only, not all flights
Cancelled
1.64%
National rate is 1.81%
1 hour+ late
6.4%
National rate is 8.1%
These figures cover 304 flights between July 2025 and June 2026. The median arrival is 13 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 1180 flies
DL 1180 flies PHL to ATL without a single fixed slot. Its most common scheduled departure was 08:00, used on 164 of 304 flights, with 08:05 (68 flights) and 08:40 (60 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.
- Departs 08:00164 flights53.9%
- Departs 08:0568 flights22.4%
- Departs 08:4060 flights19.7%
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 08:00 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 84.1%, and DL 1180 runs 4 points better at 88.0%. 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 1180 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 1180 is 9 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 6 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 1180thin sample | 304 | 88.0% | 81 min | 1.64% | 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 1180 quarter by quarter
DL 1180 did not run the same all year. Its best quarter was Oct–Dec 2025 at 90.9% on time and its weakest Jan–Mar 2026 at 76.0%, a swing of 15 points on roughly 76 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 202571 flights90.0%
- Oct–Dec 202590 flights90.9%
- Jan–Mar 202652 flights76.0%
- Apr–Jun 202691 flights90.1%
Scale runs 70% to 95%. Rows with fewer than 30 flights show a dash.
By weekday, DL 1180 did best on Wednesday at 95.5% on time and worst on Monday at 81.4%. Each day rests on about 43 flights, so a gap of 14 points is worth noticing but could still narrow in another year.
Delay causes
Why DL 1180 runs late
One category carries most of the weight here. Carrier accounts for 78% of the 2,906 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.
- 78%Carrier
- 18%National Airspace System
- 3%Extreme weather
The largest share of delay minutes, 78%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 2,278 of the 2,906 delay minutes reported here. The split is drawn from 2,906 delay minutes reported on DL 1180.
Cancellations sit at 1.64% against a national 1.81%, which is ordinary. Diversions add another 0.00%.
Connections and routes
What a delay on this flight costs
6.4% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says 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 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.
The same number turns up on two other city pairs in the data, including ATL to DFW (20) and DFW to ATL (13), but none flew often enough under DL 1180 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to PHL to ATL only.
One caution: this is a thin sample. 304 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 1180
For a booking, read DL 1180 as 88.0% on time with 1.64% cancelled over 304 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 1152 on the same route89.9%
- Delta Air Lines 2270 on the same route88.2%
- 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.