Flight number record
DL 1365
Delta Air Lines · Detroit to San Antonio
- Route
- DTW → SAT
- Departs
- 20:30
- Flights
- 359
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 1365, check with Delta Air Lines.
DL 1365 sits in the middle of the pack with a C. About seven flights in ten arrive on time by the DOT's definition, 7 points worse than the national rate of 77.3%. The late ones land about 55 minutes behind schedule. That rests on 359 flights, with a median arrival 4 minutes early.
The national on-time rate over the same period is 77.3%, so DL 1365 runs 7 points behind the country as a whole. Across a thousand flights that is about 66 extra late arrivals.
Key figures
On time
70.7%
Arrivals under 15 minutes late, of 352 completed flights
Avg delay
54 min
Across delayed arrivals only, not all flights
Cancelled
1.39%
National rate is 1.89%
1 hour+ late
9.4%
National rate is 8.3%
These figures cover 359 flights between September 2025 and August 2026. Beyond the headline rate, 9.4% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When DL 1365 flies
DL 1365 flies DTW to SAT without a single fixed slot. Its most common scheduled departure was 20:30, used on 98 of 359 flights, with 20:25 (62 flights) and 20:20 (48 flights) next.
- Departs 20:3098 flights27.3%
- Departs 20:2562 flights17.3%
- Departs 20:2048 flights13.4%
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 20:30 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.1%, and DL 1365 runs level with that at 70.7%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
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Against the route
DL 1365 next to DTW to SAT
Every carrier on DTW to SAT combined arrived on time 80.4% of the time across 934 flights, so DL 1365 is 10 points behind it. Across its whole network Delta Air Lines managed 81.1%, which this flight trails by 10 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 1365thin sample | 359 | 70.7% | 54 min | 1.39% | C |
| All Delta Air Lines on DTW–SAT | 934 | 80.4% | 56 min | 0.75% | B+ |
| All carriers on DTW–SAT | 934 | 80.4% | 56 min | 0.75% | B+ |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 1365 quarter by quarter
DL 1365 did not run the same all year. Its best quarter was Oct–Dec 2025 at 75.9% on time and its weakest Apr–Jun 2026 at 60.9%, a swing of 15 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 flights70.0%
- Oct–Dec 202587 flights75.9%
- Jan–Mar 202689 flights73.6%
- Apr–Jun 202691 flights60.9%
- Jul–Sep 202662 flights73.8%
Scale runs 50% to 80%.
By weekday, DL 1365 did best on Tuesday at 84.0% on time and worst on Friday at 60.8%. Each day rests on about 51 flights, so a gap of 23 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 1365 runs when it is late
DL 1365 often beats the schedule: 96 of 352 completed flights, 27%, arrived 15 minutes or more early. The 103 late arrivals split 39 under half an hour, 31 between 30 and 60 minutes, and 33 an hour or more.
- 15+ min early96 flights27.3%
- Within 15 min153 flights43.5%
- 15–29 min late39 flights11.1%
- 30–59 min late31 flights8.8%
- 1–2 hours late23 flights6.5%
- 2+ hours late10 flights2.8%
Scale runs 0% to 100%.
Share of 352 completed flights by arrival against schedule.
20 of 101 late departures made up the time and arrived on time, 20% of them. In the other direction, 22 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 SAT.
The worst days
Worst days for DL 1365
The latest arrival of the period was on 12 June 2026, 3 hours 34 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 |
|---|---|---|
| 12 June 2026 | 3 hours 34 minutes | Carrier |
| 18 May 2026 | 3 hours 18 minutes | Carrier |
| 14 June 2026 | 3 hours 7 minutes | Late-arriving aircraft |
| 15 March 2026 | 2 hours 49 minutes | National Airspace System |
| 17 July 2026 | 2 hours 45 minutes | Carrier |
Delay causes
Why DL 1365 runs late
Carrier accounts for 57% of the 5,590 delay minutes carriers reported here, and the remaining four split what is left.
- 57%Carrier
- 22%National Airspace System
- 17%Late-arriving aircraft
- 3%Extreme weather
The largest share of delay minutes, 57%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 3,208 of the 5,590 delay minutes reported here. The split is drawn from 5,590 delay minutes reported on DL 1365.
Cancellations sit at 1.39% against a national 1.89%, which is ordinary. Diversions add another 0.56%.
Connections and routes
What a delay on this flight costs
9.4% 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.
The 1,214 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.
Every one of the 359 flights under DL 1365 in the data flew DTW to SAT. 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. 359 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 1365
For a booking, DL 1365 is one of the weaker ways to fly DTW to SAT: 10 points below the route as a whole. If the schedule allows, compare it with the other departures listed on the route page before settling on this one.
Related
Where to go next
- DTW to SAT, every carrier and departure
- SAT to DTW, the return direction
- Delta Air Lines 788 on the same route87.7%
- Detroit Metropolitan Wayne County (DTW) delay statistics
- San Antonio International (SAT) 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.