Flight number record
DL 1272
Delta Air Lines · Salt Lake City to San Jose
- Route
- SLC → SJC
- Departs
- 22:50
- Flights
- 365
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 1272, check with Delta Air Lines.
DL 1272 lands a B, 6 points better than the national rate of 77.3%. About one flight in six arrives 15 minutes late or worse, and those flights are late by an hour and a half on average. That rests on 365 flights, with a median arrival 7 minutes early.
Set against the rest of the country, DL 1272's record is 6 points better than the US average of 77.3%. That gap is worth roughly 55 fewer late arrivals for every thousand flights.
Key figures
On time
82.8%
Arrivals under 15 minutes late, of 361 completed flights
Avg delay
87 min
Across delayed arrivals only, not all flights
Cancelled
1.10%
National rate is 1.89%
1 hour+ late
4.4%
National rate is 8.3%
These figures cover 365 flights between September 2025 and August 2026. The median arrival is 7 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 1272 flies
DL 1272 flies SLC to SJC without a single fixed slot. Its most common scheduled departure was 22:50, used on 96 of 365 flights, with 22:45 (75 flights) next.
- Departs 22:5096 flights26.3%
- Departs 22:4575 flights20.5%
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 22:50 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.1%, and DL 1272 runs 13 points better at 82.8%. 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 1272 next to SLC to SJC
Every carrier on SLC to SJC combined arrived on time 86.7% of the time across 1,796 flights, so DL 1272 is 4 points behind it. Delta flew 924 flights on the same city pair under all its flight numbers, including this one, and those ran 85.7% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight beats by 2 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 1272 | 365 | 82.8% | 87 min | 1.10% | B |
| All Delta Air Lines on SLC–SJC | 924 | 85.7% | 70 min | 0.43% | A+ |
| All carriers on SLC–SJC | 1,796 | 86.7% | 65 min | 0.39% | A+ |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 1272 quarter by quarter
DL 1272 did not run the same all year. Its best quarter was Jan–Mar 2026 at 88.6% on time and its weakest Jul–Sep 2025 at 76.7%, a swing of 12 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 flights76.7%
- Oct–Dec 202592 flights81.1%
- Jan–Mar 202690 flights88.6%
- Apr–Jun 202691 flights80.2%
- Jul–Sep 202662 flights83.9%
Scale runs 70% to 95%.
By weekday, DL 1272 did best on Wednesday at 90.4% on time and worst on Saturday at 76.5%. Each day rests on about 52 flights, so a gap of 14 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 1272 runs when it is late
DL 1272 often beats the schedule: 93 of 361 completed flights, 26%, arrived 15 minutes or more early. The 62 late arrivals split 29 under half an hour, 17 between 30 and 60 minutes, and 16 an hour or more.
- 15+ min early93 flights25.8%
- Within 15 min206 flights57.1%
- 15–29 min late29 flights8.0%
- 30–59 min late17 flights4.7%
- 1–2 hours late9 flights2.5%
- 2+ hours late7 flights1.9%
Scale runs 0% to 100%.
Share of 361 completed flights by arrival against schedule.
14 of 69 late departures made up the time and arrived on time, 20% of them. Only 7 left on time and still arrived late.
The worst days
Worst days for DL 1272
The latest arrival of the period was on 16 November 2025, 12 hours 57 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 |
|---|---|---|
| 16 November 2025 | 12 hours 57 minutes | Carrier |
| 18 January 2026 | 10 hours 31 minutes | Carrier |
| 11 June 2026 | 9 hours | Carrier |
| 18 September 2025 | 8 hours 3 minutes | Carrier |
| 3 December 2025 | 8 hours | Carrier |
Delay causes
Why DL 1272 runs late
Carrier accounts for 81% of the 5,391 delay minutes carriers reported here, and the remaining four split what is left.
- 81%Carrier
- 13%Late-arriving aircraft
- 4%National Airspace System
- 1%Extreme weather
- 0%Security
The largest share of delay minutes, 81%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 4,388 of the 5,391 delay minutes reported here. The split is drawn from 5,391 delay minutes reported on DL 1272.
Cancellations sit at 1.10% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
Connections and routes
What a delay on this flight costs
Badly late arrivals are rare here: only 4.4% land an hour or more behind schedule, against 8.3% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.
The 584 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 365 flights under DL 1272 in the data flew SLC to SJC. 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. 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.
What to do with this
Booking DL 1272
For a booking, read DL 1272 as 82.8% on time with 1.10% cancelled over 365 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- SLC to SJC, every carrier and departure
- SJC to SLC, the return direction
- Salt Lake City International (SLC) delay statistics
- Norman Y. Mineta San Jose International (SJC) 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
- Worst months to fly in the US, ranked by the data
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.