Flight number record
DL 2780
Delta Air Lines · Atlanta to Dallas
- Route
- ATL → DAL
- Departs
- 16:34
- Flights
- 361
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 2780, check with Delta Air Lines.
DL 2780 lands a B, about a point worse than the national rate of 77.3%. About one flight in four arrives 15 minutes late or worse, and those flights are late by a little over an hour on average. That rests on 361 flights, with a median arrival 6 minutes early.
Key figures
On time
76.5%
Arrivals under 15 minutes late, of 349 completed flights
Avg delay
72 min
Across delayed arrivals only, not all flights
Cancelled
2.49%
National rate is 1.89%
1 hour+ late
9.5%
National rate is 8.3%
These figures cover 361 flights between September 2025 and August 2026. Beyond the headline rate, 9.5% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When DL 2780 flies
DL 2780 flies ATL to DAL without a single fixed slot. Its most common scheduled departure was 16:34, used on 97 of 361 flights, with 16:44 (61 flights) and 16:36 (60 flights) next.
- Departs 16:3497 flights26.9%
- Departs 16:4461 flights16.9%
- Departs 16:3660 flights16.6%
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 16:34 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 71.9%, and DL 2780 runs 5 points better at 76.5%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
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Against the route
DL 2780 next to ATL to DAL
Every carrier on ATL to DAL combined arrived on time 80.4% of the time across 3,297 flights, so DL 2780 is 4 points behind it. Delta flew 1,799 flights on the same city pair under all its flight numbers, including this one, and those ran 83.6% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight trails by 5 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 2780thin sample | 361 | 76.5% | 72 min | 2.49% | B |
| All Delta Air Lines on ATL–DAL | 1,799 | 83.6% | 65 min | 2.00% | B |
| All carriers on ATL–DAL | 3,297 | 80.4% | 61 min | 1.85% | B |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 2780 quarter by quarter
DL 2780 did not run the same all year. Its best quarter was Oct–Dec 2025 at 85.7% on time and its weakest Jul–Sep 2026 at 54.8%, a swing of 31 points on roughly 72 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 flights83.3%
- Oct–Dec 202588 flights85.7%
- Jan–Mar 202690 flights80.0%
- Apr–Jun 202691 flights77.3%
- Jul–Sep 202662 flights54.8%
Scale runs 45% to 90%.
By weekday, DL 2780 did best on Wednesday at 83.7% on time and worst on Thursday at 68.1%. Each day rests on about 52 flights, so a gap of 16 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 2780 runs when it is late
DL 2780 often beats the schedule: 88 of 349 completed flights, 25%, arrived 15 minutes or more early. The 82 late arrivals split 18 under half an hour, 31 between 30 and 60 minutes, and 33 an hour or more.
- 15+ min early88 flights25.2%
- Within 15 min179 flights51.3%
- 15–29 min late18 flights5.2%
- 30–59 min late31 flights8.9%
- 1–2 hours late19 flights5.4%
- 2+ hours late14 flights4.0%
Scale runs 0% to 100%.
Share of 349 completed flights by arrival against schedule.
16 of 82 late departures made up the time and arrived on time, 20% of them. 16 flights left on time and still arrived late.
The worst days
Worst days for DL 2780
The latest arrival of the period was on 11 July 2026, 5 hours 9 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The five worst days are spread across July, August, September and March, with no single month standing out.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 11 July 2026 | 5 hours 9 minutes | Late-arriving aircraft |
| 11 August 2026 | 4 hours 37 minutes | Late-arriving aircraft |
| 19 September 2025 | 4 hours 1 minute | National Airspace System |
| 12 August 2026 | 3 hours 29 minutes | Carrier |
| 15 March 2026 | 3 hours 18 minutes | National Airspace System |
Delay causes
Why DL 2780 runs late
Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 5,891 reported delay minutes.
- 40%Carrier
- 27%Late-arriving aircraft
- 25%National Airspace System
- 8%Extreme weather
- 0%Security
The largest share of delay minutes, 40%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 2,334 of the 5,891 delay minutes reported here. The split is drawn from 5,891 delay minutes reported on DL 2780.
Cancellations sit at 2.49% against a national 1.89%, which is ordinary. Diversions add another 0.83%.
Connections and routes
What a delay on this flight costs
9.5% 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.
The 721 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.
DL 2780 is not only a ATL to DAL flight. It also flew DAL to ATL (360 flights, 76.1% on time) often enough to be scored on its own. Airlines attach one number to several legs of an aircraft's day, and each leg keeps its own record here, so check which city pair is on your booking before reading a rate.
One caution: this is a thin sample. 361 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.
| Also flown as | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DAL to ATLthin sample | 360 | 76.1% | 110 min | 2.50% | B |
What to do with this
Booking DL 2780
For a booking, read DL 2780 as 76.5% on time with 2.49% cancelled over 361 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- ATL to DAL, every carrier and departure
- DAL to ATL, the return direction
- Delta Air Lines 512 on the same route84.3%
- Delta Air Lines 1104 on the same route81.2%
- Delta Air Lines 1115 on the same route90.2%
- Delta Air Lines 441 on the same route90.2%
- Hartsfield-Jackson Atlanta International (ATL) delay statistics
- Dallas Love Field (DAL) 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
- How often a connection fails at the major US hubs
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.