Flight number record

DL 2572

Delta Air Lines · Seattle to San Diego

Route: SEA → SAN
Departs: 11:40
Flights: 361
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 2572, check with Delta Air Lines.

DL 2572 lands a B, 4 points better than the national rate of 77.6%. About one flight in five arrives 15 minutes late or worse, and those flights are late by about an hour on average. That is a workable record, not a spotless one. That rests on 361 flights, with a median arrival 6 minutes early.

On time

81.4%

Arrivals under 15 minutes late, of 354 completed flights

Avg delay

61 min

Across delayed arrivals only, not all flights

Cancelled

1.39%

National rate is 1.81%

1 hour+ late

5.9%

National rate is 8.1%

These figures cover 361 flights between July 2025 and June 2026. The median arrival is 6 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 2572 flies

DL 2572 flies SEA to SAN without a single fixed slot. Its most common scheduled departure was 11:40, used on 118 of 361 flights, with 11:25 (64 flights) and 11:45 (55 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 11:40118 flights32.7%
Departs 11:2564 flights17.7%
Departs 11:4555 flights15.2%

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 11:40 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.8%, and DL 2572 runs 3 points better at 81.4%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

DL 2572 next to SEA to SAN

Every carrier on SEA to SAN combined arrived on time 77.3% of the time across 4,584 flights, so DL 2572 is 4 points ahead of it. Delta flew 1,700 flights on the same city pair under all its flight numbers, including this one, and those ran 82.6% on time. Across its whole network Delta Air Lines managed 81.6%, close to this flight's figure.

DL 2572 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 2572thin sample	361	81.4%	61 min	1.39%	B
All Delta Air Lines on SEA–SAN	1,700	82.6%	53 min	0.94%	B+
All carriers on SEA–SAN	4,584	77.3%	46 min	1.22%	B
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 2572 quarter by quarter

DL 2572 did not run the same all year. Its best quarter was Apr–Jun 2026 at 91.1% on time and its weakest Jan–Mar 2026 at 70.9%, a swing of 20 points on roughly 90 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 202592 flights87.0%
Oct–Dec 202590 flights75.6%
Jan–Mar 202688 flights70.9%
Apr–Jun 202691 flights91.1%

Scale runs 60% to 95%. Rows with fewer than 30 flights show a dash.

By weekday, DL 2572 ranged from 76.9% on Sunday to 88.0% on Friday. With about 52 flights behind each day, a spread of 11 points is inside normal variation, so the day you fly is not worth changing for this flight.

Delay causes

Why DL 2572 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 4,037 reported delay minutes.

Carrier
41%
National Airspace System
25%
Late-arriving aircraft
25%
Extreme weather
9%

The largest share of delay minutes, 41%, 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 1,672 of the 4,037 delay minutes reported here. The split is drawn from 4,037 delay minutes reported on DL 2572.

Cancellations sit at 1.39% against a national 1.81%, which is ordinary. Diversions add another 0.55%.

Connections and routes

What a delay on this flight costs

5.9% 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 an hour, which a normal layover absorbs.

The 1,050 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.

DL 2572 is not only a SEA to SAN flight. It also flew SAN to SEA (339 flights, 86.7% 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. 361 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 2572
Also flown as	Flights	On time	Avg delay	Cancelled	Grade
SAN to SEAthin sample	339	86.7%	72 min	2.06%	A

What to do with this

Booking DL 2572

For a booking, read DL 2572 as 81.4% on time with 1.39% cancelled over 361 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