Flight number record

DL 712

Delta Air Lines · Atlanta to San Diego

Route: ATL → SAN
Departs: 16:59
Flights: 313
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 712, check with Delta Air Lines.

DL 712 sits in the middle of the pack with a B+. Close to three flights in four arrive on time by the DOT's definition, 2 points worse than the national rate of 77.6%. The late ones land about 50 minutes behind schedule. That rests on 313 flights, with a median arrival 4 minutes early.

On time

75.2%

Arrivals under 15 minutes late, of 311 completed flights

Avg delay

51 min

Across delayed arrivals only, not all flights

Cancelled

0.00%

National rate is 1.81%

1 hour+ late

6.8%

National rate is 8.1%

These figures cover 313 flights between July 2025 and June 2026. The median arrival is 4 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 712 flies

DL 712 flies ATL to SAN without a single fixed slot. Its most common scheduled departure was 16:59, used on 75 of 313 flights, with 18:05 (49 flights) and 18:35 (35 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 16:5975 flights24.0%
Departs 18:0549 flights15.7%
Departs 18:3535 flights11.2%

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 16:59 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 72.4%, and DL 712 runs 3 points better at 75.2%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

DL 712 next to ATL to SAN

Every carrier on ATL to SAN combined arrived on time 78.8% of the time across 2,413 flights, so DL 712 is 4 points behind it. Delta flew 2,172 flights on the same city pair under all its flight numbers, including this one, and those ran 78.4% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight trails by 6 points.

DL 712 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 712thin sample	313	75.2%	51 min	0.00%	B+
All Delta Air Lines on ATL–SAN	2,172	78.4%	48 min	0.69%	B+
All carriers on ATL–SAN	2,413	78.8%	47 min	0.62%	B+
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 712 quarter by quarter

DL 712 did not run the same all year. Its best quarter was Jan–Mar 2026 at 82.0% on time and its weakest Jul–Sep 2025 at 67.1%, a swing of 15 points on roughly 78 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 202580 flights67.1%
Oct–Dec 202552 flights76.9%
Jan–Mar 202690 flights82.0%
Apr–Jun 202691 flights74.7%

Scale runs 60% to 85%. Rows with fewer than 30 flights show a dash.

By weekday, DL 712 did best on Wednesday at 82.9% on time and worst on Friday at 66.7%. Each day rests on about 45 flights, so a gap of 16 points is worth noticing but could still narrow in another year.

Delay causes

Why DL 712 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 3,919 reported delay minutes.

Carrier
36%
National Airspace System
33%
Late-arriving aircraft
26%
Extreme weather
6%

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 1,397 of the 3,919 delay minutes reported here. The split is drawn from 3,919 delay minutes reported on DL 712.

Cancellations are rare at 0.00%, below the national 1.81% and low enough to earn the plus on the grade. Almost no flights are called off; the risk here is arriving late, not not arriving.

Connections and routes

What a delay on this flight costs

6.8% 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 50 minutes, 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 one other city pair in the data, including SAN to ATL (24), but none flew often enough under DL 712 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to ATL to SAN only.

One caution: this is a thin sample. 313 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 712

For a booking, read DL 712 as 75.2% on time with 0.00% cancelled over 313 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