Flight number record

DL 1492

Delta Air Lines · St. Louis to Salt Lake City

Route: STL → SLC
Departs: 17:00
Flights: 297
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 1492, check with Delta Air Lines.

DL 1492 earns a B. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 7 points better than the national rate of 77.6%. When something does go wrong the average delay runs close to two hours. That rests on 297 flights, with a median arrival 8 minutes early.

Set against the rest of the country, DL 1492's record is 7 points better than the US average of 77.6%. That gap is worth roughly 66 fewer late arrivals for every thousand flights.

On time

84.2%

Arrivals under 15 minutes late, of 291 completed flights

Avg delay

121 min

Across delayed arrivals only, not all flights

Cancelled

1.68%

National rate is 1.81%

1 hour+ late

7.2%

National rate is 8.1%

These figures cover 297 flights between July 2025 and June 2026. The median arrival is 8 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 1492 flies

DL 1492 flies STL to SLC without a single fixed slot. Its most common scheduled departure was 17:00, used on 37 of 297 flights, with 19:15 (34 flights) and 18:12 (31 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 17:0037 flights12.5%
Departs 19:1534 flights11.4%
Departs 18:1231 flights10.4%

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 17:00 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.2%, and DL 1492 runs 16 points better at 84.2%. 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 1492 next to STL to SLC

Every carrier on STL to SLC combined arrived on time 87.5% of the time across 989 flights, so DL 1492 is 3 points behind it. Delta flew 978 flights on the same city pair under all its flight numbers, including this one, and those ran 87.6% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight beats by 3 points.

DL 1492 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 1492thin sample	297	84.2%	121 min	1.68%	B
All Delta Air Lines on STL–SLC	978	87.6%	104 min	0.82%	A+
All carriers on STL–SLC	989	87.5%	103 min	0.81%	A+
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 1492 quarter by quarter

Quarter by quarter DL 1492 held fairly steady: 87.1% in Jul–Sep 2025, 84.1% in Oct–Dec 2025, 80.8% in Jan–Mar 2026 and 84.4% in Apr–Jun 2026. A spread of 6 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202588 flights87.1%
Oct–Dec 202569 flights84.1%
Jan–Mar 202675 flights80.8%
Apr–Jun 202665 flights84.4%

Scale runs 70% to 95%. 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 71.4%. Each day rests on about 42 flights, so a gap of 18 points is worth noticing but could still narrow in another year.

Delay causes

Why DL 1492 runs late

One category carries most of the weight here. Carrier accounts for 64% of the 5,544 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
64%
Late-arriving aircraft
29%
National Airspace System
6%
Extreme weather
0%

The largest share of delay minutes, 64%, 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 3,558 of the 5,544 delay minutes reported here. The split is drawn from 5,544 delay minutes reported on DL 1492.

Cancellations sit at 1.68% against a national 1.81%, which is ordinary. Diversions add another 0.34%.

Connections and routes

What a delay on this flight costs

7.2% 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 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. 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.

The same number turns up on two other city pairs in the data, including SLC to STL (216) 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. 297 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 84.2% on time with 1.68% cancelled over 297 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