Flight number record

DL 1272

Delta Air Lines · Salt Lake City to San Jose

Route: SLC → SJC
Departs: 22:50
Flights: 365
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 1272, check with Delta Air Lines.

DL 1272 lands a B, 3 points better than the national rate of 77.6%. About one flight in five arrives 15 minutes late or worse, and those flights are late by a little over an hour on average. That is a workable record, not a spotless one. That rests on 365 flights, with a median arrival 6 minutes early.

On time

80.9%

Arrivals under 15 minutes late, of 361 completed flights

Avg delay

82 min

Across delayed arrivals only, not all flights

Cancelled

1.10%

National rate is 1.81%

1 hour+ late

5.3%

National rate is 8.1%

These figures cover 365 flights between July 2025 and June 2026. The median arrival is 6 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.

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 89 of 365 flights, with 22:45 (78 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 22:5089 flights24.4%
Departs 22:4578 flights21.4%

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 22:50 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.5%, and DL 1272 runs 10 points better at 80.9%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.

Against the route

DL 1272 next to SLC to SJC

Every carrier on SLC to SJC combined arrived on time 87.0% of the time across 1,810 flights, so DL 1272 is 6 points behind it. Delta flew 892 flights on the same city pair under all its flight numbers, including this one, and those ran 84.6% on time. Across its whole network Delta Air Lines managed 81.6%, close to this flight's figure.

DL 1272 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 1272	365	80.9%	82 min	1.10%	B
All Delta Air Lines on SLC–SJC	892	84.6%	73 min	0.45%	B+
All carriers on SLC–SJC	1,810	87.0%	65 min	0.39%	A+
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	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 73.9%, a swing of 15 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 flights73.9%
Oct–Dec 202592 flights81.1%
Jan–Mar 202690 flights88.6%
Apr–Jun 202691 flights80.2%

Scale runs 65% to 95%. Rows with fewer than 30 flights show a dash.

By weekday, DL 1272 did best on Wednesday at 88.5% on time and worst on Sunday at 76.5%. Each day rests on about 52 flights, so a gap of 12 points is worth noticing but could still narrow in another year.

Delay causes

Why DL 1272 runs late

One category carries most of the weight here. Carrier accounts for 72% of the 5,630 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
72%
Late-arriving aircraft
23%
National Airspace System
5%
Security
0%
Extreme weather
0%

The largest share of delay minutes, 72%, 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 4,038 of the 5,630 delay minutes reported here. The split is drawn from 5,630 delay minutes reported on DL 1272.

Cancellations sit at 1.10% against a national 1.81%, which is ordinary. Diversions add another 0.00%.

Connections and routes

What a delay on this flight costs

5.3% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last a little over an hour, which a normal layover absorbs.

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. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.

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, DL 1272 is one of the weaker ways to fly SLC to SJC: 6 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.

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