Flight number record
DL 2728
Delta Air Lines · Salt Lake City to Austin
- Route
- SLC → AUS
- Departs
- 17:45
- Flights
- 363
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 2728, check with Delta Air Lines.
DL 2728 lands a B+, 3 points better than the national rate of 77.3%. 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 rests on 363 flights, with a median arrival 6 minutes early.
Key figures
On time
80.2%
Arrivals under 15 minutes late, of 359 completed flights
Avg delay
69 min
Across delayed arrivals only, not all flights
Cancelled
0.55%
National rate is 1.89%
1 hour+ late
6.7%
National rate is 8.3%
These figures cover 363 flights between September 2025 and August 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.
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Schedule
When DL 2728 flies
DL 2728 flies SLC to AUS without a single fixed slot. Its most common scheduled departure was 17:45, used on 133 of 363 flights, with 17:15 (85 flights) and 17:40 (63 flights) next.
- Departs 17:45133 flights36.6%
- Departs 17:1585 flights23.4%
- Departs 17:4063 flights17.4%
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 17:45 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.0%, and DL 2728 runs 12 points better at 80.2%. 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 2728 next to SLC to AUS
Every carrier on SLC to AUS combined arrived on time 81.5% of the time across 1,796 flights, so DL 2728 is about level with it. Delta flew 1,072 flights on the same city pair under all its flight numbers, including this one, and those ran 83.2% on time. Across its whole network Delta Air Lines managed 81.1%, close to this flight's figure.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 2728thin sample | 363 | 80.2% | 69 min | 0.55% | B+ |
| All Delta Air Lines on SLC–AUS | 1,072 | 83.2% | 62 min | 0.65% | B+ |
| All carriers on SLC–AUS | 1,796 | 81.5% | 56 min | 0.67% | B+ |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 2728 quarter by quarter
DL 2728 did not run the same all year. Its best quarter was Jul–Sep 2025 at 93.3% on time and its weakest Jul–Sep 2026 at 59.7%, a swing of 34 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 flights93.3%
- Oct–Dec 202590 flights73.3%
- Jan–Mar 202690 flights92.1%
- Apr–Jun 202691 flights85.2%
- Jul–Sep 202662 flights59.7%
Scale runs 50% to 100%.
By weekday, DL 2728 did best on Saturday at 86.5% on time and worst on Sunday at 74.0%. Each day rests on about 52 flights, so a gap of 13 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 2728 runs when it is late
DL 2728 often beats the schedule: 103 of 359 completed flights, 29%, arrived 15 minutes or more early. The 71 late arrivals split 26 under half an hour, 21 between 30 and 60 minutes, and 24 an hour or more.
- 15+ min early103 flights28.7%
- Within 15 min185 flights51.5%
- 15–29 min late26 flights7.2%
- 30–59 min late21 flights5.8%
- 1–2 hours late11 flights3.1%
- 2+ hours late13 flights3.6%
Scale runs 0% to 100%.
Share of 359 completed flights by arrival against schedule.
17 of 78 late departures made up the time and arrived on time, 22% of them. 10 flights left on time and still arrived late.
The worst days
Worst days for DL 2728
The latest arrival of the period was on 30 October 2025, 4 hours 30 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on four of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 30 October 2025 | 4 hours 30 minutes | Carrier |
| 20 July 2026 | 4 hours 15 minutes | Carrier |
| 2 September 2025 | 3 hours 38 minutes | Carrier |
| 15 November 2025 | 3 hours 13 minutes | Carrier |
| 10 November 2025 | 3 hours 10 minutes | Extreme weather |
Delay causes
Why DL 2728 runs late
Carrier accounts for 60% of the 4,865 delay minutes carriers reported here, and the remaining four split what is left.
- 60%Carrier
- 24%Late-arriving aircraft
- 9%National Airspace System
- 7%Extreme weather
The largest share of delay minutes, 60%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 2,916 of the 4,865 delay minutes reported here. The split is drawn from 4,865 delay minutes reported on DL 2728.
Cancellations are rare at 0.55%, below the national 1.89% 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
6.7% of arrivals land an hour or more late, close to the national 8.3%, so 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.
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 80.2% on time with 0.55% cancelled over 363 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- SLC to AUS, every carrier and departure
- AUS to SLC, the return direction
- Salt Lake City International (SLC) delay statistics
- Austin-Bergstrom International (AUS) 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.