Flight number record
DL 783
Delta Air Lines · Los Angeles to Atlanta
- Route
- LAX → ATL
- Departs
- 21:55
- Flights
- 362
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 783, check with Delta Air Lines.
DL 783 lands a B+, 3 points better than the national rate of 77.3%. About one flight in five arrives 15 minutes late or worse, and those flights are late by about an hour on average. That rests on 362 flights, with a median arrival 6 minutes early.
Key figures
On time
80.2%
Arrivals under 15 minutes late, of 359 completed flights
Avg delay
66 min
Across delayed arrivals only, not all flights
Cancelled
0.55%
National rate is 1.89%
1 hour+ late
5.0%
National rate is 8.3%
These figures cover 362 flights between September 2025 and August 2026. The median arrival is 6 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.
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Schedule
When DL 783 flies
DL 783 flies LAX to ATL without a single fixed slot. Its most common scheduled departure was 21:55, used on 174 of 362 flights, with 21:45 (94 flights) next.
- Departs 21:55174 flights48.1%
- Departs 21:4594 flights26.0%
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 21:55 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.1%, and DL 783 runs 10 points better at 80.2%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
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Against the route
DL 783 next to LAX to ATL
Every carrier on LAX to ATL combined arrived on time 78.6% of the time across 4,843 flights, so DL 783 is 2 points ahead of it. Delta flew 3,811 flights on the same city pair under all its flight numbers, including this one, and those ran 80.8% on time. Across its whole network Delta Air Lines managed 81.1%, close to this flight's figure.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 783thin sample | 362 | 80.2% | 66 min | 0.55% | B+ |
| All Delta Air Lines on LAX–ATL | 3,811 | 80.8% | 66 min | 0.84% | B+ |
| All carriers on LAX–ATL | 4,843 | 78.6% | 68 min | 0.89% | B+ |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 783 quarter by quarter
DL 783 did not run the same all year. Its best quarter was Jul–Sep 2025 at 93.3% on time and its weakest Jan–Mar 2026 at 72.7%, a swing of 21 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 flights93.3%
- Oct–Dec 202590 flights78.9%
- Jan–Mar 202690 flights72.7%
- Apr–Jun 202690 flights88.9%
- Jul–Sep 202662 flights73.8%
Scale runs 65% to 100%.
By weekday, DL 783 did best on Thursday at 86.3% on time and worst on Tuesday at 73.1%. Each day rests on about 52 flights, so a gap of 13 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 783 runs when it is late
DL 783 often beats the schedule: 98 of 359 completed flights, 27%, arrived 15 minutes or more early. Most of the lateness is short. 36 of the 71 late arrivals were under half an hour behind, and 18 reached an hour or more.
- 15+ min early98 flights27.3%
- Within 15 min190 flights52.9%
- 15–29 min late36 flights10.0%
- 30–59 min late17 flights4.7%
- 1–2 hours late10 flights2.8%
- 2+ hours late8 flights2.2%
Scale runs 0% to 100%.
Share of 359 completed flights by arrival against schedule.
A late pushback is often recovered here: of 95 departures that left 15 minutes late or more, 33 still arrived on time. 9 flights left on time and still arrived late.
The worst days
Worst days for DL 783
The latest arrival of the period was on 21 April 2026, 13 hours 14 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 21 April 2026 | 13 hours 14 minutes | Carrier |
| 22 May 2026 | 10 hours 7 minutes | Carrier |
| 23 September 2025 | 4 hours 10 minutes | Carrier |
| 5 July 2026 | 3 hours 52 minutes | Late-arriving aircraft |
| 17 August 2026 | 2 hours 33 minutes | Late-arriving aircraft |
Delay causes
Why DL 783 runs late
Carrier accounts for 65% of the 4,715 delay minutes carriers reported here, and the remaining four split what is left.
- 65%Carrier
- 30%Late-arriving aircraft
- 6%National Airspace System
The largest share of delay minutes, 65%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 3,051 of the 4,715 delay minutes reported here. The split is drawn from 4,715 delay minutes reported on DL 783.
Cancellations are rare at 0.55%, below the national 1.89% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.
Connections and routes
What a delay on this flight costs
5.0% 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 about an hour, which a normal layover absorbs.
At 1,947 miles this is transcontinental flying, and long routes get a quiet structural advantage. Scheduled block time on a flight this length carries more padding in absolute minutes, so a twenty-minute late departure often still becomes an on-time arrival. Read the on-time rate here as slightly flattering next to a short-haul route with the same operational quality.
Every one of the 362 flights under DL 783 in the data flew LAX 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. 362 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 783
For a booking, read DL 783 as 80.2% on time with 0.55% cancelled over 362 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- LAX to ATL, every carrier and departure
- ATL to LAX, the return direction
- Delta Air Lines 515 on the same route82.9%
- Delta Air Lines 390 on the same route88.5%
- Delta Air Lines 782 on the same route79.8%
- Delta Air Lines 899 on the same route79.5%
- Delta Air Lines 446 on the same route84.7%
- Delta Air Lines 528 on the same route84.7%
- Los Angeles International (LAX) 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.