Flight number record
DL 381
Delta Air Lines · Austin to San Francisco
- Route
- AUS → SFO
- Departs
- 07:10
- Flights
- 365
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 381, check with Delta Air Lines.
DL 381 sits in the middle of the pack with a C. Close to three flights in four arrive on time by the DOT's definition, 3 points worse than the national rate of 77.3%. The late ones land about an hour behind schedule. That rests on 365 flights, with a median arrival 4 minutes early.
Key figures
On time
74.7%
Arrivals under 15 minutes late, of 359 completed flights
Avg delay
66 min
Across delayed arrivals only, not all flights
Cancelled
1.37%
National rate is 1.89%
1 hour+ late
9.7%
National rate is 8.3%
These figures cover 365 flights between September 2025 and August 2026. Beyond the headline rate, 9.7% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When DL 381 flies
DL 381 flies AUS to SFO without a single fixed slot. Its most common scheduled departure was 07:10, used on 86 of 365 flights, with 10:57 (59 flights) and 11:05 (59 flights) next.
- Departs 07:1086 flights23.6%
- Departs 10:5759 flights16.2%
- Departs 11:0559 flights16.2%
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 07:10 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and DL 381 runs 15 points worse at 74.7%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
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Against the route
DL 381 next to AUS to SFO
Every carrier on AUS to SFO combined arrived on time 72.4% of the time across 2,788 flights, so DL 381 is 2 points ahead of it. Across its whole network Delta Air Lines managed 81.1%, which this flight trails by 6 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 381 | 365 | 74.7% | 66 min | 1.37% | C |
| All Delta Air Lines on AUS–SFO | 500 | 69.2% | 63 min | 1.00% | C |
| All carriers on AUS–SFO | 2,788 | 72.4% | 67 min | 0.54% | C+ |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 381 quarter by quarter
DL 381 did not run the same all year. Its best quarter was Jul–Sep 2026 at 95.2% on time and its weakest Jul–Sep 2025 at 60.0%, a swing of 35 points on roughly 73 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 flights60.0%
- Oct–Dec 202592 flights72.2%
- Jan–Mar 202690 flights67.8%
- Apr–Jun 202691 flights74.4%
- Jul–Sep 202662 flights95.2%
Scale runs 50% to 100%.
By weekday, DL 381 did best on Friday at 78.8% on time and worst on Sunday at 64.0%. Each day rests on about 52 flights, so a gap of 15 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 381 runs when it is late
The 91 late arrivals split 33 under half an hour, 23 between 30 and 60 minutes, and 35 an hour or more.
- 15+ min early63 flights17.5%
- Within 15 min205 flights57.1%
- 15–29 min late33 flights9.2%
- 30–59 min late23 flights6.4%
- 1–2 hours late21 flights5.8%
- 2+ hours late14 flights3.9%
Scale runs 0% to 100%.
Share of 359 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 59 departures that left 15 minutes late or more, only 2 made it up before arrival. In the other direction, 34 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 SFO.
The worst days
Worst days for DL 381
The latest arrival of the period was on 5 October 2025, 7 hours 53 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on five of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 5 October 2025 | 7 hours 53 minutes | Carrier |
| 25 February 2026 | 5 hours 1 minute | Carrier |
| 20 November 2025 | 2 hours 54 minutes | Carrier |
| 7 December 2025 | 2 hours 54 minutes | Carrier |
| 8 March 2026 | 2 hours 52 minutes | Carrier |
Delay causes
Why DL 381 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 5,957 reported delay minutes.
- 41%Carrier
- 31%National Airspace System
- 28%Late-arriving aircraft
- 0%Extreme weather
The largest share of delay minutes, 41%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 2,414 of the 5,957 delay minutes reported here. The split is drawn from 5,957 delay minutes reported on DL 381.
Cancellations sit at 1.37% against a national 1.89%, which is ordinary. Diversions add another 0.27%.
Connections and routes
What a delay on this flight costs
9.7% 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 1,504 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.
DL 381 is not only a AUS to SFO flight. It also flew SFO to AUS (365 flights, 71.3% 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. 365 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.
| Also flown as | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| SFO to AUS | 365 | 71.3% | 80 min | 1.64% | C |
What to do with this
Booking DL 381
For a booking, read DL 381 as 74.7% on time with 1.37% cancelled over 365 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- AUS to SFO, every carrier and departure
- SFO to AUS, the return direction
- United Airlines 1668 on the same route71.0%
- United Airlines 292 on the same route61.0%
- United Airlines 2177 on the same route92.5%
- Austin-Bergstrom International (AUS) delay statistics
- San Francisco International (SFO) 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.