Flight number record

DL 725

Delta Air Lines · Atlanta to San Diego

Route: ATL → SAN
Departs: 08:05
Flights: 362
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 725, check with Delta Air Lines.

DL 725 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 about 45 minutes. That rests on 362 flights, with a median arrival 3 minutes early.

Set against the rest of the country, DL 725's record is 10 points better than the US average of 77.6%. That gap is worth roughly 99 fewer late arrivals for every thousand flights.

On time

87.5%

Arrivals under 15 minutes late, of 359 completed flights

Avg delay

45 min

Across delayed arrivals only, not all flights

Cancelled

0.55%

National rate is 1.81%

1 hour+ late

2.2%

National rate is 8.1%

These figures cover 362 flights between July 2025 and June 2026. The median arrival is 3 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 725 flies

DL 725 flies ATL to SAN without a single fixed slot. Its most common scheduled departure was 08:05, used on 117 of 362 flights, with 08:10 (79 flights) and 08:15 (38 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 08:05117 flights32.3%
Departs 08:1079 flights21.8%
Departs 08:1538 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 08:05 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 84.1%, and DL 725 runs 3 points better at 87.5%. 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 725 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 725 is 9 points ahead of 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 beats by 6 points.

DL 725 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 725thin sample	362	87.5%	45 min	0.55%	A+
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 725 quarter by quarter

Quarter by quarter DL 725 held fairly steady: 88.0% in Jul–Sep 2025, 87.0% in Oct–Dec 2025, 86.9% in Jan–Mar 2026 and 87.9% in Apr–Jun 2026. A spread of about a point is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202592 flights88.0%
Oct–Dec 202592 flights87.0%
Jan–Mar 202687 flights86.9%
Apr–Jun 202691 flights87.9%

Scale runs 80% to 95%. Rows with fewer than 30 flights show a dash.

By weekday, DL 725 did best on Monday at 94.2% on time and worst on Thursday at 78.4%. 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 725 runs late

One category carries most of the weight here. Carrier accounts for 63% of the 2,003 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
63%
National Airspace System
36%
Late-arriving aircraft
1%
Extreme weather
1%

The largest share of delay minutes, 63%, 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 1,258 of the 2,003 delay minutes reported here. The split is drawn from 2,003 delay minutes reported on DL 725.

Cancellations are rare at 0.55%, below the national 1.81% 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

Badly late arrivals are rare here: only 2.2% land an hour or more behind schedule, against 8.1% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.

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.

DL 725 is not only a ATL to SAN flight. It also flew SAN to ATL (362 flights, 86.4% 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. 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.

Other routes flown as DL 725
Also flown as	Flights	On time	Avg delay	Cancelled	Grade
SAN to ATLthin sample	362	86.4%	50 min	0.28%	A+

What to do with this

Booking DL 725

For a booking, DL 725 has one of the better records a US domestic flight can show: 87.5% on time and 0.55% cancelled. That is a base rate, not a promise about any single 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