Flight number record
DL 1180
Delta Air Lines · Philadelphia to Atlanta
- Route
- PHL → ATL
- Departs
- 08:00
- Flights
- 313
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 1180, check with Delta Air Lines.
DL 1180 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 8 points better than the national rate of 77.3%. When something does go wrong the average delay runs close to two hours. That rests on 313 flights, with a median arrival 11 minutes early.
Set against the rest of the country, DL 1180's record is 8 points better than the US average of 77.3%. That gap is worth roughly 77 fewer late arrivals for every thousand flights.
Key figures
On time
85.0%
Arrivals under 15 minutes late, of 306 completed flights
Avg delay
106 min
Across delayed arrivals only, not all flights
Cancelled
2.24%
National rate is 1.89%
1 hour+ late
8.8%
National rate is 8.3%
These figures cover 313 flights between September 2025 and August 2026. Beyond the headline rate, 8.8% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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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 111 of 313 flights, with 08:05 (96 flights) and 08:40 (60 flights) next.
- Departs 08:00111 flights35.5%
- Departs 08:0596 flights30.7%
- Departs 08:4060 flights19.2%
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 08:00 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and DL 1180 runs level with that at 85.0%. 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 1180 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 1180 is 7 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 4 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 1180thin sample | 313 | 85.0% | 106 min | 2.24% | 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 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 Jul–Sep 2026 at 71.2%, a swing of 20 points on roughly 78 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 202518 flights—
- Oct–Dec 202590 flights90.9%
- Jan–Mar 202652 flights76.0%
- Apr–Jun 202691 flights90.1%
- Jul–Sep 202662 flights71.2%
Scale runs 65% to 95%. Rows with fewer than 30 flights show a dash.
By weekday, DL 1180 did best on Wednesday at 93.2% on time and worst on Sunday at 75.6%. Each day rests on about 45 flights, so a gap of 18 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 1180 runs when it is late
DL 1180 often beats the schedule: 124 of 306 completed flights, 41%, arrived 15 minutes or more early. When DL 1180 is late it tends to be very late: 27 of its 46 late arrivals were an hour or more behind, and 13 were two hours or more.
- 15+ min early124 flights40.5%
- Within 15 min136 flights44.4%
- 15–29 min late11 flights3.6%
- 30–59 min late8 flights2.6%
- 1–2 hours late14 flights4.6%
- 2+ hours late13 flights4.2%
Scale runs 0% to 100%.
Share of 306 completed flights by arrival against schedule.
7 of 42 late departures made up the time and arrived on time, 17% of them. 11 flights left on time and still arrived late.
The worst days
Worst days for DL 1180
The latest arrival of the period was on 11 July 2026, 12 hours 8 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 |
|---|---|---|
| 11 July 2026 | 12 hours 8 minutes | Carrier |
| 24 April 2026 | 6 hours 52 minutes | Carrier |
| 5 July 2026 | 5 hours 59 minutes | Carrier |
| 19 July 2026 | 3 hours 42 minutes | Carrier |
| 6 June 2026 | 3 hours 29 minutes | Carrier |
Delay causes
Why DL 1180 runs late
Carrier accounts for 85% of the 4,870 delay minutes carriers reported here, and the remaining four split what is left.
- 85%Carrier
- 13%National Airspace System
- 2%Extreme weather
The largest share of delay minutes, 85%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 4,119 of the 4,870 delay minutes reported here. The split is drawn from 4,870 delay minutes reported on DL 1180.
Cancellations sit at 2.24% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
Connections and routes
What a delay on this flight costs
8.8% 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 close to two hours, 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.
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. 313 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 85.0% on time with 2.24% cancelled over 313 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 route85.8%
- Delta Air Lines 2270 on the same route87.3%
- Frontier Airlines 2551 on the same route73.0%
- 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.