Flight number record
DL 1492
Delta Air Lines · St. Louis to Salt Lake City
- Route
- STL → SLC
- Departs
- 19:55
- Flights
- 296
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 1492, check with Delta Air Lines.
DL 1492 lands a B, 5 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 close to two hours on average. That rests on 296 flights, with a median arrival 7 minutes early.
Set against the rest of the country, DL 1492's record is 5 points better than the US average of 77.3%. That gap is worth roughly 49 fewer late arrivals for every thousand flights.
Key figures
On time
82.2%
Arrivals under 15 minutes late, of 292 completed flights
Avg delay
120 min
Across delayed arrivals only, not all flights
Cancelled
1.35%
National rate is 1.89%
1 hour+ late
8.6%
National rate is 8.3%
These figures cover 296 flights between September 2025 and August 2026. Beyond the headline rate, 8.6% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When DL 1492 flies
DL 1492 flies STL to SLC without a single fixed slot. Its most common scheduled departure was 19:55, used on 48 of 296 flights, with 17:00 (39 flights) and 18:12 (31 flights) next.
- Departs 19:5548 flights16.2%
- Departs 17:0039 flights13.2%
- Departs 18:1231 flights10.5%
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 19:55 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.0%, and DL 1492 runs 14 points better at 82.2%. 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 1492 next to STL to SLC
Every carrier on STL to SLC combined arrived on time 86.8% of the time across 990 flights, so DL 1492 is 5 points behind it. Delta flew 981 flights on the same city pair under all its flight numbers, including this one, and those ran 87.0% 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 1492thin sample | 296 | 82.2% | 120 min | 1.35% | B |
| All Delta Air Lines on STL–SLC | 981 | 87.0% | 103 min | 0.92% | A+ |
| All carriers on STL–SLC | 990 | 86.8% | 102 min | 0.91% | A+ |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 1492 quarter by quarter
Quarter by quarter DL 1492 held fairly steady: 84.1% in Oct–Dec 2025, 80.8% in Jan–Mar 2026, 84.4% in Apr–Jun 2026 and 77.0% in Jul–Sep 2026. A spread of 7 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
- Jul–Sep 202526 flights—
- Oct–Dec 202569 flights84.1%
- Jan–Mar 202675 flights80.8%
- Apr–Jun 202665 flights84.4%
- Jul–Sep 202661 flights77.0%
Scale runs 70% to 90%. Rows with fewer than 30 flights show a dash.
By weekday, DL 1492 did best on Saturday at 88.9% on time and worst on Sunday at 73.8%. Each day rests on about 42 flights, so a gap of 15 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 1492 runs when it is late
DL 1492 often beats the schedule: 82 of 292 completed flights, 28%, arrived 15 minutes or more early. The 52 late arrivals split 12 under half an hour, 15 between 30 and 60 minutes, and 25 an hour or more.
- 15+ min early82 flights28.1%
- Within 15 min158 flights54.1%
- 15–29 min late12 flights4.1%
- 30–59 min late15 flights5.1%
- 1–2 hours late14 flights4.8%
- 2+ hours late11 flights3.8%
Scale runs 0% to 100%.
Share of 292 completed flights by arrival against schedule.
7 of 54 late departures made up the time and arrived on time, 13% of them. Only 5 left on time and still arrived late.
The worst days
Worst days for DL 1492
The latest arrival of the period was on 24 June 2026, 16 hours 45 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 |
|---|---|---|
| 24 June 2026 | 16 hours 45 minutes | Carrier |
| 4 February 2026 | 15 hours 20 minutes | Carrier |
| 28 March 2026 | 14 hours 48 minutes | Carrier |
| 19 August 2026 | 4 hours 15 minutes | Carrier |
| 7 April 2026 | 3 hours 29 minutes | Carrier |
Delay causes
Why DL 1492 runs late
Carrier accounts for 65% of the 6,245 delay minutes carriers reported here, and the remaining four split what is left.
- 65%Carrier
- 28%Late-arriving aircraft
- 7%National Airspace System
- 1%Extreme weather
The largest share of delay minutes, 65%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 4,042 of the 6,245 delay minutes reported here. The split is drawn from 6,245 delay minutes reported on DL 1492.
Cancellations sit at 1.35% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
Connections and routes
What a delay on this flight costs
8.6% 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 close to two hours, which a normal layover absorbs.
The 1,156 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.
The same number turns up on two other city pairs in the data, including SLC to STL (218) and DTW to MCO (16), but none flew often enough under DL 1492 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to STL to SLC only.
One caution: this is a thin sample. 296 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 1492
For a booking, read DL 1492 as 82.2% on time with 1.35% cancelled over 296 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- STL to SLC, every carrier and departure
- SLC to STL, the return direction
- Delta Air Lines 2363 on the same route91.2%
- Delta Air Lines 2455 on the same route88.4%
- St. Louis Lambert International (STL) delay statistics
- Salt Lake City International (SLC) 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.