Flight number record

DL 453

Delta Air Lines · Atlanta to Salt Lake City

Route: ATL → SLC
Departs: 21:15
Flights: 346
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 453, check with Delta Air Lines.

DL 453 sits in the middle of the pack with a C+. Close to three flights in four arrive on time by the DOT's definition, 4 points worse than the national rate of 77.6%. The late ones land a little over an hour behind schedule. That rests on 346 flights, with a median arrival 3 minutes early.

On time

74.0%

Arrivals under 15 minutes late, of 342 completed flights

Avg delay

80 min

Across delayed arrivals only, not all flights

Cancelled

0.58%

National rate is 1.81%

1 hour+ late

10.2%

National rate is 8.1%

These figures cover 346 flights between July 2025 and June 2026. Beyond the headline rate, 10.2% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.

Schedule

When DL 453 flies

DL 453 flies ATL to SLC without a single fixed slot. Its most common scheduled departure was 21:15, used on 62 of 346 flights, with 21:35 (55 flights) and 21:40 (54 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 21:1562 flights17.9%
Departs 21:3555 flights15.9%
Departs 21:4054 flights15.6%

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 21:15 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.5%, and DL 453 runs 4 points better at 74.0%. 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 453 next to ATL to SLC

Every carrier on ATL to SLC combined arrived on time 83.0% of the time across 2,965 flights, so DL 453 is 9 points behind it. Delta flew 2,959 flights on the same city pair under all its flight numbers, including this one, and those ran 83.0% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight trails by 8 points.

DL 453 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 453thin sample	346	74.0%	80 min	0.58%	C+
All Delta Air Lines on ATL–SLC	2,959	83.0%	60 min	0.41%	B+
All carriers on ATL–SLC	2,965	83.0%	60 min	0.40%	B+
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 453 quarter by quarter

Quarter by quarter DL 453 held fairly steady: 68.9% in Jul–Sep 2025, 77.2% in Oct–Dec 2025, 77.4% in Jan–Mar 2026 and 73.0% in Apr–Jun 2026. A spread of 9 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202590 flights68.9%
Oct–Dec 202579 flights77.2%
Jan–Mar 202686 flights77.4%
Apr–Jun 202691 flights73.0%

Scale runs 60% to 85%. Rows with fewer than 30 flights show a dash.

By weekday, DL 453 did best on Wednesday at 82.0% on time and worst on Friday at 68.0%. Each day rests on about 49 flights, so a gap of 14 points is worth noticing but could still narrow in another year.

Delay causes

Why DL 453 runs late

One category carries most of the weight here. Carrier accounts for 59% of the 7,088 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
59%
Late-arriving aircraft
22%
National Airspace System
12%
Extreme weather
7%

The largest share of delay minutes, 59%, 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 4,152 of the 7,088 delay minutes reported here. The split is drawn from 7,088 delay minutes reported on DL 453.

Cancellations are rare at 0.58%, below the national 1.81% 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

For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 10.2% of arrivals land a full hour or more behind schedule, against 8.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum here, and two hours if the onward flight is on a separate ticket.

At 1,590 miles this is transcontinental flying, and long routes get a quiet structural advantage. Scheduled block time on a flight this length carries more padding in absolute minutes, so a twenty-minute late departure often still becomes an on-time arrival. Read the on-time rate here as slightly flattering next to a short-haul route with the same operational quality.

The same number turns up on one other city pair in the data, including JFK to DTW (11), but none flew often enough under DL 453 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to ATL to SLC only.

One caution: this is a thin sample. 346 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 453

For a booking, DL 453 is one of the weaker ways to fly ATL to SLC: 9 points below the route as a whole. If the schedule allows, compare it with the other departures listed on the route page before settling on this one.

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