Flight number record

DL 2572

Delta Air Lines · Seattle to San Diego

Route: SEA → SAN
Departs: 11:25
Flights: 361
Period: September 2025 to August 2026

Historical statistics for September 2025 to August 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 77.3%. Roughly one flight in five arrives 15 minutes late or worse, and those flights are late by about an hour on average. That rests on 361 flights, with a median arrival 5 minutes early.

Set against the rest of the country, DL 2572's record is 4 points better than the US average of 77.3%. That gap is worth roughly 43 fewer late arrivals for every thousand flights.

On time

81.6%

Arrivals under 15 minutes late, of 354 completed flights

Avg delay

64 min

Across delayed arrivals only, not all flights

Cancelled

1.39%

National rate is 1.89%

1 hour+ late

6.5%

National rate is 8.3%

These figures cover 361 flights between September 2025 and August 2026. The median arrival is 5 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 2572 flies

DL 2572 flies SEA to SAN without a single fixed slot. Its most common scheduled departure was 11:25, used on 64 of 361 flights, with 11:40 (56 flights) and 12:14 (55 flights) next.

Departs 11:2564 flights17.7%
Departs 11:4056 flights15.5%
Departs 12:1455 flights15.2%

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 11:25 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.3%, and DL 2572 runs 3 points better at 81.6%. 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 2572 next to SEA to SAN

Every carrier on SEA to SAN combined arrived on time 75.0% of the time across 4,647 flights, so DL 2572 is 7 points ahead of it. Delta flew 1,710 flights on the same city pair under all its flight numbers, including this one, and those ran 81.1% on time. Across its whole network Delta Air Lines managed 81.1%, 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	81.6%	64 min	1.39%	B
All Delta Air Lines on SEA–SAN	1,710	81.1%	51 min	0.94%	B+
All carriers on SEA–SAN	4,647	75.0%	47 min	0.90%	B+
Delta Air Lines, whole network	1,039,517	81.1%	71 min	1.74%	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 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 flights90.0%
Oct–Dec 202590 flights75.6%
Jan–Mar 202688 flights70.9%
Apr–Jun 202691 flights91.1%
Jul–Sep 202662 flights87.1%

Scale runs 60% to 95%.

By weekday, DL 2572 did best on Saturday at 89.6% on time and worst on Thursday at 72.9%. Each day rests on about 52 flights, so a gap of 17 points is worth noticing but could still narrow in another year.

Arrival by arrival

How late DL 2572 runs when it is late

DL 2572 often beats the schedule: 106 of 354 completed flights, 30%, arrived 15 minutes or more early. The 65 late arrivals split 25 under half an hour, 17 between 30 and 60 minutes, and 23 an hour or more.

15+ min early106 flights29.9%
Within 15 min183 flights51.7%
15–29 min late25 flights7.1%
30–59 min late17 flights4.8%
1–2 hours late15 flights4.2%
2+ hours late8 flights2.3%

Scale runs 0% to 100%.

Share of 354 completed flights by arrival against schedule.

7 of 53 late departures made up the time and arrived on time, 13% 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 SAN.

The worst days

Worst days for DL 2572

The latest arrival of the period was on 21 March 2026, 3 hours 40 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The five worst days are spread across March, April, January and September, with no single month standing out.

The latest arrivals of DL 2572 in the period
Date	Arrived late by	Largest filed cause
21 March 2026	3 hours 40 minutes	Carrier
1 April 2026	3 hours 21 minutes	Late-arriving aircraft
13 March 2026	3 hours 12 minutes	Extreme weather
26 January 2026	2 hours 57 minutes	Extreme weather
18 September 2025	2 hours 48 minutes	Carrier

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 4,157 reported delay minutes.

Carrier
41%
National Airspace System
28%
Late-arriving aircraft
22%
Extreme weather
8%

The largest share of delay minutes, 41%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 1,720 of the 4,157 delay minutes reported here. The split is drawn from 4,157 delay minutes reported on DL 2572.

Cancellations sit at 1.39% against a national 1.89%, which is ordinary. Diversions add another 0.55%.

Connections and routes

What a delay on this flight costs

6.5% of arrivals land an hour or more late, close to the national 8.3%, so 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.

DL 2572 is not only a SEA to SAN flight. It also flew SAN to SEA (348 flights, 85.3% 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	348	85.3%	70 min	2.01%	A

What to do with this

Booking DL 2572

For a booking, read DL 2572 as 81.6% 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, September 2025 to August 2026. Last updated 22 October 2026; recomputed monthly. How this data is collected.

Key figures