Flight number record

DL 369

Delta Air Lines · Detroit to San Diego

Route: DTW → SAN
Departs: 16:30
Flights: 364
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 369, check with Delta Air Lines.

DL 369 sits in the middle of the pack with a C+. About seven flights in ten arrive on time by the DOT's definition, 5 points worse than the national rate of 77.6%. The late ones land about an hour behind schedule. That rests on 364 flights, with a median arrival 1 minute late.

The national on-time rate over the same period is 77.6%, so DL 369 runs 5 points behind the country as a whole. Across a thousand flights that is about 53 extra late arrivals.

On time

72.3%

Arrivals under 15 minutes late, of 358 completed flights

Avg delay

59 min

Across delayed arrivals only, not all flights

Cancelled

0.82%

National rate is 1.81%

1 hour+ late

9.5%

National rate is 8.1%

These figures cover 364 flights between July 2025 and June 2026. Beyond the headline rate, 9.5% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.

Schedule

When DL 369 flies

DL 369 flies DTW to SAN without a single fixed slot. Its most common scheduled departure was 16:30, used on 63 of 364 flights, with 16:24 (62 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 16:3063 flights17.3%
Departs 16:2462 flights17.0%

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 16:30 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 72.4%, and DL 369 runs level with that at 72.3%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

DL 369 next to DTW to SAN

Every carrier on DTW to SAN combined arrived on time 75.4% of the time across 1,314 flights, so DL 369 is 3 points behind it. Delta flew 1,260 flights on the same city pair under all its flight numbers, including this one, and those ran 74.9% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight trails by 9 points.

DL 369 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 369thin sample	364	72.3%	59 min	0.82%	C+
All Delta Air Lines on DTW–SAN	1,260	74.9%	58 min	1.03%	C
All carriers on DTW–SAN	1,314	75.4%	58 min	1.07%	B
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 369 quarter by quarter

DL 369 did not run the same all year. Its best quarter was Jul–Sep 2025 at 76.9% on time and its weakest Jan–Mar 2026 at 65.5%, a swing of 11 points on roughly 91 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 flights76.9%
Oct–Dec 202591 flights70.0%
Jan–Mar 202690 flights65.5%
Apr–Jun 202691 flights76.7%

Scale runs 55% to 80%. Rows with fewer than 30 flights show a dash.

By weekday, DL 369 did best on Tuesday at 78.8% on time and worst on Friday at 63.5%. Each day rests on about 52 flights, so a gap of 15 points is worth noticing but could still narrow in another year.

Delay causes

Why DL 369 runs late

One category carries most of the weight here. Carrier accounts for 45% of the 5,850 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
45%
Late-arriving aircraft
32%
National Airspace System
21%
Extreme weather
2%

The largest share of delay minutes, 45%, 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 2,630 of the 5,850 delay minutes reported here. The split is drawn from 5,850 delay minutes reported on DL 369.

Cancellations are rare at 0.82%, 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

For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 9.5% of arrivals land a full hour or more behind schedule, against 8.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum here, and two hours if the onward flight is on a separate ticket.

At 1,956 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.

Every one of the 364 flights under DL 369 in the data flew DTW to SAN. The number was not reused on any other city pair, which makes this a clean record of one route.

One caution: this is a thin sample. 364 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 369

For a booking, read DL 369 as 72.3% on time with 0.82% cancelled over 364 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