Flight number record

DL 725

Delta Air Lines · San Diego to Atlanta

Route: SAN → ATL
Departs: 11:02
Flights: 362
Period: September 2025 to August 2026

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

DL 725 earns an A+. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 9 points better than the national rate of 77.3%. When something does go wrong the average delay runs about 50 minutes. That rests on 362 flights, with a median arrival 8 minutes early.

Set against the rest of the country, DL 725's record is 9 points better than the US average of 77.3%. That gap is worth roughly 89 fewer late arrivals for every thousand flights.

On time

86.2%

Arrivals under 15 minutes late, of 362 completed flights

Avg delay

51 min

Across delayed arrivals only, not all flights

Cancelled

0.00%

National rate is 1.89%

1 hour+ late

3.0%

National rate is 8.3%

These figures cover 362 flights between September 2025 and August 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.

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Schedule

When DL 725 flies

DL 725 flies SAN to ATL without a single fixed slot. Its most common scheduled departure was 11:02, used on 71 of 362 flights, with 10:37 (39 flights) next.

Departs 11:0271 flights19.6%
Departs 10:3739 flights10.8%

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 11:02 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.3%, and DL 725 runs 8 points better at 86.2%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

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Against the route

DL 725 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 725 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 5 points.

DL 725 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 725thin sample	362	86.2%	51 min	0.00%	A+
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 725 quarter by quarter

DL 725 did not run the same all year. Its best quarter was Oct–Dec 2025 at 91.3% on time and its weakest Jan–Mar 2026 at 79.3%, a swing of 12 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 flights80.0%
Oct–Dec 202592 flights91.3%
Jan–Mar 202687 flights79.3%
Apr–Jun 202691 flights90.1%
Jul–Sep 202662 flights85.5%

Scale runs 70% to 95%.

By weekday, DL 725 ranged from 82.4% on Sunday to 90.0% on Saturday. With about 52 flights behind each day, a spread of 8 points is inside normal variation, so the day you fly is not worth changing for this flight.

Arrival by arrival

How late DL 725 runs when it is late

DL 725 often beats the schedule: 123 of 362 completed flights, 34%, arrived 15 minutes or more early. Most of the lateness is short. 25 of the 50 late arrivals were under half an hour behind, and 11 reached an hour or more.

15+ min early123 flights34.0%
Within 15 min189 flights52.2%
15–29 min late25 flights6.9%
30–59 min late14 flights3.9%
1–2 hours late8 flights2.2%
2+ hours late3 flights0.8%

Scale runs 0% to 100%.

Share of 362 completed flights by arrival against schedule.

13 of 44 late departures made up the time and arrived on time, 30% of them. In the other direction, 19 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 725

The latest arrival of the period was on 1 January 2026, 4 hours 20 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The same cause led on four of the five worst days.

The latest arrivals of DL 725 in the period
Date	Arrived late by	Largest filed cause
1 January 2026	4 hours 20 minutes	Late-arriving aircraft
8 March 2026	3 hours 48 minutes	Late-arriving aircraft
23 May 2026	3 hours 40 minutes	Carrier
18 September 2025	1 hour 53 minutes	Late-arriving aircraft
17 March 2026	1 hour 45 minutes	Late-arriving aircraft

Delay causes

Why DL 725 runs late

Late-arriving aircraft accounts for 52% of the 2,531 delay minutes carriers reported here, and the remaining four split what is left.

Late-arriving aircraft
52%
National Airspace System
25%
Carrier
20%
Security
3%
Extreme weather
1%

52% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 2,531 reported delay minutes here, that single category outweighs weather by 52 to one. The split is drawn from 2,531 delay minutes reported on DL 725.

Cancellations are rare at 0.00%, below the national 1.89% 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

Badly late arrivals are rare here: only 3.0% land an hour or more behind schedule, against 8.3% 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 SAN to ATL flight. It also flew ATL to SAN (362 flights, 87.5% 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
ATL to SANthin sample	362	87.5%	39 min	0.55%	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: 86.2% on time and 0.00% 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, September 2025 to August 2026. Last updated 22 October 2026; recomputed monthly. How this data is collected.

Key figures