Flight number record
DL 1179
Delta Air Lines · San Diego to Atlanta
- Route
- SAN → ATL
- Departs
- 08:00
- Flights
- 278
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 1179, check with Delta Air Lines.
DL 1179 earns a B. 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 an hour and a half. That rests on 278 flights, with a median arrival 7 minutes early.
Set against the rest of the country, DL 1179's record is 8 points better than the US average of 77.3%. That gap is worth roughly 76 fewer late arrivals for every thousand flights.
Key figures
On time
84.9%
Arrivals under 15 minutes late, of 271 completed flights
Avg delay
89 min
Across delayed arrivals only, not all flights
Cancelled
2.16%
National rate is 1.89%
1 hour+ late
6.3%
National rate is 8.3%
These figures cover 278 flights between September 2025 and August 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.
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Schedule
When DL 1179 flies
DL 1179 is scheduled to leave San Diego (SAN) at 08:00 local time and reach Atlanta (ATL) at 15:14. That slot held for 250 of the 278 scheduled departures in the data, so the figures below describe one steady operation rather than a number that moved around the clock.
- Departs 08:00250 flights89.9%
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 1179 runs level with that at 84.9%. 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 1179 next to SAN to ATL
Every carrier on SAN to ATL combined arrived on time 85.7% of the time across 2,352 flights, so DL 1179 is about level with it. Delta flew 2,172 flights on the same city pair under all its flight numbers, including this one, and those ran 86.1% 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 1179thin sample | 278 | 84.9% | 89 min | 2.16% | B |
| All Delta Air Lines on SAN–ATL | 2,172 | 86.1% | 76 min | 0.69% | A+ |
| All carriers on SAN–ATL | 2,352 | 85.7% | 74 min | 0.64% | A+ |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 1179 quarter by quarter
DL 1179 did not run the same all year. Its best quarter was Apr–Jun 2026 at 91.1% on time and its weakest Jul–Sep 2026 at 76.7%, a swing of 14 points on roughly 70 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.
- Oct–Dec 202535 flights87.5%
- Jan–Mar 202690 flights83.1%
- Apr–Jun 202691 flights91.1%
- Jul–Sep 202662 flights76.7%
Scale runs 70% to 95%.
By weekday, DL 1179 did best on Wednesday at 92.3% on time and worst on Monday at 69.2%. Each day rests on about 40 flights, so a gap of 23 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 1179 runs when it is late
DL 1179 often beats the schedule: 75 of 271 completed flights, 28%, arrived 15 minutes or more early. The 41 late arrivals split 17 under half an hour, 7 between 30 and 60 minutes, and 17 an hour or more.
- 15+ min early75 flights27.7%
- Within 15 min155 flights57.2%
- 15–29 min late17 flights6.3%
- 30–59 min late7 flights2.6%
- 1–2 hours late9 flights3.3%
- 2+ hours late8 flights3.0%
Scale runs 0% to 100%.
Share of 271 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 26 departures that left 15 minutes late or more, only 3 made it up before arrival. In the other direction, 18 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at ATL.
The worst days
Worst days for DL 1179
The latest arrival of the period was on 17 May 2026, 12 hours 11 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). On three of the five worst days the largest share was filed as a late-arriving aircraft.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 17 May 2026 | 12 hours 11 minutes | Carrier |
| 22 March 2026 | 5 hours 46 minutes | Late-arriving aircraft |
| 15 June 2026 | 4 hours 41 minutes | Late-arriving aircraft |
| 22 December 2025 | 3 hours 51 minutes | Carrier |
| 17 March 2026 | 3 hours 46 minutes | Late-arriving aircraft |
Delay causes
Why DL 1179 runs late
Carrier accounts for 59% of the 3,660 delay minutes carriers reported here, and the remaining four split what is left.
- 59%Carrier
- 21%Late-arriving aircraft
- 15%National Airspace System
- 4%Extreme weather
The largest share of delay minutes, 59%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 2,167 of the 3,660 delay minutes reported here. The split is drawn from 3,660 delay minutes reported on DL 1179.
Cancellations sit at 2.16% against a national 1.89%, which is ordinary. Diversions add another 0.36%.
Connections and routes
What a delay on this flight costs
6.3% 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 an hour and a half, which a normal layover absorbs.
At 1,892 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.
The same number turns up on two other city pairs in the data, including IAH to ATL (29) and LGA to BOS (1), but none flew often enough under DL 1179 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to SAN to ATL only.
One caution: this is a thin sample. 278 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 1179
For a booking, read DL 1179 as 84.9% on time with 2.16% cancelled over 278 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- SAN to ATL, every carrier and departure
- ATL to SAN, the return direction
- Delta Air Lines 729 on the same route90.9%
- Delta Air Lines 725 on the same route86.2%
- San Diego International (SAN) 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.