Flight number record
DL 1612
Delta Air Lines · Detroit to Austin
- Route
- DTW → AUS
- Departs
- 16:15
- Flights
- 324
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 1612, check with Delta Air Lines.
DL 1612 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 roughly 50 minutes on average. That rests on 324 flights, with a median arrival 9 minutes early.
Key figures
On time
80.1%
Arrivals under 15 minutes late, of 322 completed flights
Avg delay
52 min
Across delayed arrivals only, not all flights
Cancelled
0.62%
National rate is 1.89%
1 hour+ late
5.6%
National rate is 8.3%
These figures cover 324 flights between September 2025 and August 2026. The median arrival is 9 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.
Fare search by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Schedule
When DL 1612 flies
DL 1612 flies DTW to AUS without a single fixed slot. Its most common scheduled departure was 16:15, used on 69 of 324 flights, with 16:25 (36 flights) next.
- Departs 16:1569 flights21.3%
- Departs 16:2536 flights11.1%
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 16:15 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 71.9%, and DL 1612 runs 8 points better at 80.1%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
Timetable by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Against the route
DL 1612 next to DTW to AUS
Every carrier on DTW to AUS combined arrived on time 80.1% of the time across 1,307 flights, so DL 1612 is about level with it. Delta flew 1,290 flights on the same city pair under all its flight numbers, including this one, and those ran 80.1% 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 1612thin sample | 324 | 80.1% | 52 min | 0.62% | B+ |
| All Delta Air Lines on DTW–AUS | 1,290 | 80.1% | 53 min | 1.40% | B |
| All carriers on DTW–AUS | 1,307 | 80.1% | 53 min | 1.38% | B |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 1612 quarter by quarter
DL 1612 did not run the same all year. Its best quarter was Apr–Jun 2026 at 85.4% on time and its weakest Oct–Dec 2025 at 70.0%, a swing of 15 points on roughly 81 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 202526 flights—
- Oct–Dec 202570 flights70.0%
- Jan–Mar 202690 flights80.9%
- Apr–Jun 202683 flights85.4%
- Jul–Sep 202655 flights76.4%
Scale runs 60% to 90%. Rows with fewer than 30 flights show a dash.
By weekday, DL 1612 did best on Tuesday at 93.8% on time and worst on Monday at 72.0%. Each day rests on about 46 flights, so a gap of 22 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 1612 runs when it is late
DL 1612 often beats the schedule: 122 of 322 completed flights, 38%, arrived 15 minutes or more early. The 64 late arrivals split 29 under half an hour, 17 between 30 and 60 minutes, and 18 an hour or more.
- 15+ min early122 flights37.9%
- Within 15 min136 flights42.2%
- 15–29 min late29 flights9.0%
- 30–59 min late17 flights5.3%
- 1–2 hours late11 flights3.4%
- 2+ hours late7 flights2.2%
Scale runs 0% to 100%.
Share of 322 completed flights by arrival against schedule.
A late pushback is often recovered here: of 61 departures that left 15 minutes late or more, 20 still arrived on time. In the other direction, 23 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 AUS.
The worst days
Worst days for DL 1612
The latest arrival of the period was on 20 October 2025, 3 hours 18 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 |
|---|---|---|
| 20 October 2025 | 3 hours 18 minutes | Carrier |
| 14 June 2026 | 3 hours 16 minutes | Carrier |
| 13 July 2026 | 2 hours 53 minutes | Carrier |
| 15 March 2026 | 2 hours 47 minutes | National Airspace System |
| 20 August 2026 | 2 hours 21 minutes | Carrier |
Delay causes
Why DL 1612 runs late
Carrier accounts for 45% of the 3,328 delay minutes carriers reported here, and the remaining four split what is left.
- 45%Carrier
- 39%National Airspace System
- 16%Late-arriving aircraft
The largest share of delay minutes, 45%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 1,510 of the 3,328 delay minutes reported here. The split is drawn from 3,328 delay minutes reported on DL 1612.
Cancellations are rare at 0.62%, 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
5.6% 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 roughly 50 minutes, which a normal layover absorbs.
The 1,149 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 324 flights under DL 1612 in the data flew DTW 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. 324 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 1612
For a booking, read DL 1612 as 80.1% on time with 0.62% cancelled over 324 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- DTW to AUS, every carrier and departure
- AUS to DTW, the return direction
- Delta Air Lines 1218 on the same route83.5%
- Delta Air Lines 2578 on the same route74.7%
- Delta Air Lines 1012 on the same route80.8%
- Detroit Metropolitan Wayne County (DTW) 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.