Flight number record
DL 369
Delta Air Lines · Detroit to San Diego
- Route
- DTW → SAN
- Departs
- 16:35
- Flights
- 364
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 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, 6 points worse than the national rate of 77.3%. 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 77.3%, so DL 369 runs 6 points behind the country as a whole. Across a thousand flights that is about 55 extra late arrivals.
Key figures
On time
71.8%
Arrivals under 15 minutes late, of 358 completed flights
Avg delay
56 min
Across delayed arrivals only, not all flights
Cancelled
0.82%
National rate is 1.89%
1 hour+ late
9.5%
National rate is 8.3%
These figures cover 364 flights between September 2025 and August 2026. Beyond the headline rate, 9.5% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When DL 369 flies
DL 369 flies DTW to SAN without a single fixed slot. Its most common scheduled departure was 16:35, used on 86 of 364 flights, with 16:30 (63 flights) next.
- Departs 16:3586 flights23.6%
- Departs 16:3063 flights17.3%
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 16:35 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 71.9%, and DL 369 runs level with that at 71.8%. 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 369 next to DTW to SAN
Every carrier on DTW to SAN combined arrived on time 73.5% of the time across 1,269 flights, so DL 369 is 2 points behind it. Delta flew 1,250 flights on the same city pair under all its flight numbers, including this one, and those ran 73.3% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight trails by 9 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 369thin sample | 364 | 71.8% | 56 min | 0.82% | C+ |
| All Delta Air Lines on DTW–SAN | 1,250 | 73.3% | 60 min | 0.80% | C+ |
| All carriers on DTW–SAN | 1,269 | 73.5% | 60 min | 0.87% | C+ |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 369 quarter by quarter
DL 369 did not run the same all year. Its best quarter was Apr–Jun 2026 at 76.7% 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 202530 flights—
- Oct–Dec 202591 flights70.0%
- Jan–Mar 202690 flights65.5%
- Apr–Jun 202691 flights76.7%
- Jul–Sep 202662 flights67.7%
Scale runs 55% to 80%. Rows with fewer than 30 flights show a dash.
By weekday, DL 369 did best on Saturday at 84.6% on time and worst on Friday at 59.6%. Each day rests on about 52 flights, so a gap of 25 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 369 runs when it is late
The 101 late arrivals split 37 under half an hour, 30 between 30 and 60 minutes, and 34 an hour or more.
- 15+ min early72 flights20.1%
- Within 15 min185 flights51.7%
- 15–29 min late37 flights10.3%
- 30–59 min late30 flights8.4%
- 1–2 hours late23 flights6.4%
- 2+ hours late11 flights3.1%
Scale runs 0% to 100%.
Share of 358 completed flights by arrival against schedule.
14 of 90 late departures made up the time and arrived on time, 16% of them. In the other direction, 25 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 369
The latest arrival of the period was on 25 December 2025, 3 hours 18 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 25 December 2025 | 3 hours 18 minutes | Carrier |
| 31 January 2026 | 3 hours 18 minutes | Carrier |
| 7 November 2025 | 3 hours 13 minutes | Carrier |
| 7 August 2026 | 3 hours 9 minutes | Late-arriving aircraft |
| 1 December 2025 | 2 hours 51 minutes | Late-arriving aircraft |
Delay causes
Why DL 369 runs late
Carrier accounts for 42% of the 5,615 delay minutes carriers reported here, and the remaining four split what is left.
- 42%Carrier
- 30%Late-arriving aircraft
- 23%National Airspace System
- 5%Extreme weather
The largest share of delay minutes, 42%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 2,365 of the 5,615 delay minutes reported here. The split is drawn from 5,615 delay minutes reported on DL 369.
Cancellations are rare at 0.82%, below the national 1.89% 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
9.5% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection 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 71.8% on time with 0.82% cancelled over 364 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- DTW to SAN, every carrier and departure
- SAN to DTW, the return direction
- Delta Air Lines 492 on the same route82.8%
- Delta Air Lines 700 on the same route61.1%
- Detroit Metropolitan Wayne County (DTW) delay statistics
- San Diego International (SAN) delay statistics
- Delta Air Lines on-time record
- Every Delta Air Lines flight number with a record
- The most and least reliable flight numbers in the US
- How often a connection fails at the major US hubs
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 ; recomputed monthly. How this data is collected.