Flight number record

DL 2728

Delta Air Lines · Salt Lake City to Austin

Route: SLC → AUS
Departs: 17:15
Flights: 363
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 2728, check with Delta Air Lines.

DL 2728 lands a B+, 5 points better than the national rate of 77.6%. About one flight in six 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 363 flights, with a median arrival 7 minutes early.

Set against the rest of the country, DL 2728's record is 5 points better than the US average of 77.6%. That gap is worth roughly 48 fewer late arrivals for every thousand flights.

On time

82.4%

Arrivals under 15 minutes late, of 357 completed flights

Avg delay

74 min

Across delayed arrivals only, not all flights

Cancelled

0.83%

National rate is 1.81%

1 hour+ late

6.2%

National rate is 8.1%

These figures cover 363 flights between July 2025 and June 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.

Schedule

When DL 2728 flies

DL 2728 flies SLC to AUS without a single fixed slot. Its most common scheduled departure was 17:15, used on 147 of 363 flights, with 17:45 (71 flights) and 17:40 (63 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 17:15147 flights40.5%
Departs 17:4571 flights19.6%
Departs 17:4063 flights17.4%

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 17:15 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.2%, and DL 2728 runs 14 points better at 82.4%. 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 2728 next to SLC to AUS

Every carrier on SLC to AUS combined arrived on time 82.1% of the time across 1,783 flights, so DL 2728 is about level with it. Delta flew 1,081 flights on the same city pair under all its flight numbers, including this one, and those ran 82.6% on time. Across its whole network Delta Air Lines managed 81.6%, close to this flight's figure.

DL 2728 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 2728thin sample	363	82.4%	74 min	0.83%	B+
All Delta Air Lines on SLC–AUS	1,081	82.6%	66 min	0.56%	B+
All carriers on SLC–AUS	1,783	82.1%	59 min	0.62%	B+
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 2728 quarter by quarter

DL 2728 did not run the same all year. Its best quarter was Jan–Mar 2026 at 92.1% on time and its weakest Oct–Dec 2025 at 73.3%, a swing of 19 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 flights78.9%
Oct–Dec 202590 flights73.3%
Jan–Mar 202690 flights92.1%
Apr–Jun 202691 flights85.2%

Scale runs 65% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, DL 2728 ranged from 76.9% on Monday to 88.5% on Saturday. With about 52 flights behind each day, a spread of 12 points is inside normal variation, so the day you fly is not worth changing for this flight.

Delay causes

Why DL 2728 runs late

One category carries most of the weight here. Carrier accounts for 59% of the 4,628 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
59%
Late-arriving aircraft
20%
National Airspace System
13%
Extreme weather
9%

The largest share of delay minutes, 59%, 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 2,714 of the 4,628 delay minutes reported here. The split is drawn from 4,628 delay minutes reported on DL 2728.

Cancellations are rare at 0.83%, below the national 1.81% 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

6.2% 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 1,086 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 363 flights under DL 2728 in the data flew SLC to AUS. 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. 363 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 2728

For a booking, read DL 2728 as 82.4% on time with 0.83% cancelled over 363 flights. Those are rates from the past twelve months, not a forecast for any particular day.

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