Flight number record

DL 1179

Delta Air Lines · San Diego to Atlanta

Route: SAN → ATL
Departs: 08:00
Flights: 257
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 1179, check with Delta Air Lines.

DL 1179 earns an A. Close to nine flights in ten arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 10 points better than the national rate of 77.6%. When something does go wrong the average delay runs close to two hours. That rests on 257 flights, with a median arrival 8 minutes early.

Set against the rest of the country, DL 1179's record is 10 points better than the US average of 77.6%. That gap is worth roughly 104 fewer late arrivals for every thousand flights.

On time

88.0%

Arrivals under 15 minutes late, of 251 completed flights

Avg delay

103 min

Across delayed arrivals only, not all flights

Cancelled

1.95%

National rate is 1.81%

1 hour+ late

6.0%

National rate is 8.1%

These figures cover 257 flights between July 2025 and June 2026. The median arrival is 8 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 1179 flies

DL 1179 is scheduled to leave San Diego (SAN) at 08:00 local time and reach Atlanta (ATL) at 15:25. That slot held for 230 of the 257 scheduled departures in the data, so the figures below describe one steady operation rather than a number that moved around the clock.

Departs 08:00230 flights89.5%
Departs 08:0527 flights10.5%

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 08:00 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 84.1%, and DL 1179 runs 4 points better at 88.0%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.

Against the route

DL 1179 next to SAN to ATL

Every carrier on SAN to ATL combined arrived on time 85.5% of the time across 2,412 flights, so DL 1179 is 3 points ahead of it. Delta flew 2,171 flights on the same city pair under all its flight numbers, including this one, and those ran 86.9% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight beats by 6 points.

DL 1179 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 1179thin sample	257	88.0%	103 min	1.95%	A
All Delta Air Lines on SAN–ATL	2,171	86.9%	69 min	0.74%	A+
All carriers on SAN–ATL	2,412	85.5%	66 min	0.70%	A+
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 1179 quarter by quarter

Quarter by quarter DL 1179 held fairly steady: 92.5% in Jul–Sep 2025, 87.5% in Oct–Dec 2025, 83.1% in Jan–Mar 2026 and 91.1% in Apr–Jun 2026. A spread of 9 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202541 flights92.5%
Oct–Dec 202535 flights87.5%
Jan–Mar 202690 flights83.1%
Apr–Jun 202691 flights91.1%

Scale runs 75% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, DL 1179 did best on Friday at 97.1% on time and worst on Monday at 74.3%. Each day rests on about 37 flights, so a gap of 23 points is worth noticing but could still narrow in another year.

Delay causes

Why DL 1179 runs late

One category carries most of the weight here. Carrier accounts for 61% of the 3,088 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.

Carrier
61%
Late-arriving aircraft
25%
National Airspace System
9%
Extreme weather
5%

The largest share of delay minutes, 61%, 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 1,874 of the 3,088 delay minutes reported here. The split is drawn from 3,088 delay minutes reported on DL 1179.

Cancellations sit at 1.95% against a national 1.81%, which is ordinary. Diversions add another 0.39%.

Connections and routes

What a delay on this flight costs

6.0% 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 close to two hours, 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 (37) 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. 257 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 88.0% on time with 1.95% cancelled over 257 flights. Those are rates from the past twelve months, not a forecast for any particular day.

Where to go next

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.

Key figures