Flight number record

DL 1393

Delta Air Lines · Atlanta to St. Louis

Route: ATL → STL
Departs: 17:16
Flights: 274
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 1393, check with Delta Air Lines.

DL 1393 lands a B−, 3 points better than the national rate of 77.6%. About one flight in five arrives 15 minutes late or worse, and those flights are late by about an hour on average. That is a workable record, not a spotless one. That rests on 274 flights, with a median arrival 5 minutes early.

On time

81.0%

Arrivals under 15 minutes late, of 263 completed flights

Avg delay

63 min

Across delayed arrivals only, not all flights

Cancelled

4.01%

National rate is 1.81%

1 hour+ late

6.8%

National rate is 8.1%

These figures cover 274 flights between July 2025 and June 2026. The median arrival is 5 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 1393 flies

DL 1393 flies ATL to STL without a single fixed slot. Its most common scheduled departure was 17:16, used on 58 of 274 flights, with 17:24 (41 flights) and 17:09 (28 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 17:1658 flights21.2%
Departs 17:2441 flights15.0%
Departs 17:0928 flights10.2%

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 17:16 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.2%, and DL 1393 runs 13 points better at 81.0%. 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 1393 next to ATL to STL

Every carrier on ATL to STL combined arrived on time 82.4% of the time across 3,706 flights, so DL 1393 is about level with it. Delta flew 2,371 flights on the same city pair under all its flight numbers, including this one, and those ran 84.7% on time. Across its whole network Delta Air Lines managed 81.6%, close to this flight's figure.

DL 1393 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 1393thin sample	274	81.0%	63 min	4.01%	B−
All Delta Air Lines on ATL–STL	2,371	84.7%	55 min	1.98%	B
All carriers on ATL–STL	3,706	82.4%	56 min	1.54%	B
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 1393 quarter by quarter

DL 1393 did not run the same all year. Its best quarter was Apr–Jun 2026 at 88.2% on time and its weakest Jul–Sep 2025 at 71.4%, a swing of 17 points on roughly 69 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 202542 flights71.4%
Oct–Dec 202587 flights82.1%
Jan–Mar 202656 flights75.0%
Apr–Jun 202689 flights88.2%

Scale runs 65% to 95%. Rows with fewer than 30 flights show a dash.

Delay causes

Why DL 1393 runs late

One category carries most of the weight here. Carrier accounts for 53% of the 3,138 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
53%
Late-arriving aircraft
21%
National Airspace System
17%
Extreme weather
8%
Security
1%

The largest share of delay minutes, 53%, 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 1,677 of the 3,138 delay minutes reported here. The split is drawn from 3,138 delay minutes reported on DL 1393.

Cancellations run at 4.01%, against 1.81% nationally. That is about one flight in 25 cancelled outright. A cancelled flight is invisible in every on-time figure on this page, so the punctuality numbers above describe only the flights that actually operated.

Connections and routes

What a delay on this flight costs

6.8% 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 about an hour, which a normal layover absorbs.

The same number turns up on one other city pair in the data, including STL to ATL (227), but none flew often enough under DL 1393 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to ATL to STL only.

One caution: this is a thin sample. 274 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 1393

For a booking, the cancellation rate is the figure to plan around on DL 1393: 4.01% of its 274 scheduled flights did not operate. A late arrival costs about an hour, but a cancellation costs the day, so leave a later option open.

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