Flight number record
DL 2780
Delta Air Lines · Atlanta to Dallas
- Route
- ATL → DAL
- Departs
- 16:34
- Flights
- 361
- Period
- July 2025 to June 2026
Historical statistics for July 2025 to June 2026, not live status. For today’s DL 2780, check with Delta Air Lines.
DL 2780 lands a B, 3 points better than the national rate of 77.6%. About one flight in five arrives 15 minutes late or worse, and those flights are late by about an hour on average. That is a workable record, not a spotless one. That rests on 361 flights, with a median arrival 7 minutes early.
Key figures
On time
80.1%
Arrivals under 15 minutes late, of 346 completed flights
Avg delay
62 min
Across delayed arrivals only, not all flights
Cancelled
2.49%
National rate is 1.81%
1 hour+ late
7.2%
National rate is 8.1%
These figures cover 361 flights between July 2025 and June 2026. The median arrival is 7 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 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 16:36 (66 flights) and 16:31 (55 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.
- Departs 16:3497 flights26.9%
- Departs 16:3666 flights18.3%
- Departs 16:3155 flights15.2%
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 16:34 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 72.4%, and DL 2780 runs 8 points better at 80.1%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
Against the route
DL 2780 next to ATL to DAL
Every carrier on ATL to DAL combined arrived on time 81.3% of the time across 3,398 flights, so DL 2780 is about level with it. Delta flew 1,850 flights on the same city pair under all its flight numbers, including this one, and those ran 84.4% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight trails by 2 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 2780thin sample | 361 | 80.1% | 62 min | 2.49% | B |
| All Delta Air Lines on ATL–DAL | 1,850 | 84.4% | 62 min | 2.00% | B |
| All carriers on ATL–DAL | 3,398 | 81.3% | 60 min | 1.85% | B |
| Delta Air Lines, whole network | 1,038,570 | 81.6% | 71 min | 1.62% | B |
Across the year
DL 2780 quarter by quarter
Quarter by quarter DL 2780 held fairly steady: 77.5% in Jul–Sep 2025, 85.7% in Oct–Dec 2025, 80.0% in Jan–Mar 2026 and 77.3% in Apr–Jun 2026. A spread of 8 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
- Jul–Sep 202592 flights77.5%
- Oct–Dec 202588 flights85.7%
- Jan–Mar 202690 flights80.0%
- Apr–Jun 202691 flights77.3%
Scale runs 70% to 90%. Rows with fewer than 30 flights show a dash.
By weekday, DL 2780 did best on Wednesday at 85.7% on time and worst on Sunday at 70.0%. Each day rests on about 52 flights, so a gap of 16 points is worth noticing but could still narrow in another year.
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 4,278 reported delay minutes.
- 36%Carrier
- 28%Late-arriving aircraft
- 26%National Airspace System
- 10%Extreme weather
- 1%Security
The largest share of delay minutes, 36%, 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 1,527 of the 4,278 delay minutes reported here. The split is drawn from 4,278 delay minutes reported on DL 2780.
Cancellations sit at 2.49% against a national 1.81%, which is ordinary. Diversions add another 1.66%.
Connections and routes
What a delay on this flight costs
7.2% 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 about an hour, which a normal layover absorbs.
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. 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.
DL 2780 is not only a ATL to DAL flight. It also flew DAL to ATL (360 flights, 78.6% 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 | 78.6% | 116 min | 2.50% | B |
What to do with this
Booking DL 2780
For a booking, read DL 2780 as 80.1% 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 route86.2%
- Delta Air Lines 1104 on the same route81.4%
- Delta Air Lines 1115 on the same route91.5%
- 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
- 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.