Flight number record

DL 526

Delta Air Lines · Atlanta to Salt Lake City

Route: ATL → SLC
Departs: 15:15
Flights: 365
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 526, check with Delta Air Lines.

DL 526 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 roughly 50 minutes on average. That is a workable record, not a spotless one. That rests on 365 flights, with a median arrival 7 minutes early.

On time

80.5%

Arrivals under 15 minutes late, of 365 completed flights

Avg delay

48 min

Across delayed arrivals only, not all flights

Cancelled

0.00%

National rate is 1.81%

1 hour+ late

3.0%

National rate is 8.1%

These figures cover 365 flights between July 2025 and June 2026. The median arrival is 7 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 526 flies

DL 526 flies ATL to SLC without a single fixed slot. Its most common scheduled departure was 15:15, used on 149 of 365 flights, with 14:59 (62 flights) and 15:20 (43 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 15:15149 flights40.8%
Departs 14:5962 flights17.0%
Departs 15:2043 flights11.8%

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 15:15 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 72.4%, and DL 526 runs 8 points better at 80.5%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

DL 526 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 526 is 3 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%, close to this flight's figure.

DL 526 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 526	365	80.5%	48 min	0.00%	B+
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 526 quarter by quarter

DL 526 did not run the same all year. Its best quarter was Apr–Jun 2026 at 86.8% on time and its weakest Jan–Mar 2026 at 76.7%, a swing of 10 points on roughly 91 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 202592 flights77.2%
Oct–Dec 202592 flights81.5%
Jan–Mar 202690 flights76.7%
Apr–Jun 202691 flights86.8%

Scale runs 70% to 90%. Rows with fewer than 30 flights show a dash.

By weekday, DL 526 did best on Wednesday at 90.4% on time and worst on Thursday at 75.0%. Each day rests on about 52 flights, so a gap of 15 points is worth noticing but could still narrow in another year.

Delay causes

Why DL 526 runs late

One category carries most of the weight here. Carrier accounts for 59% of the 3,410 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
19%
National Airspace System
18%
Extreme weather
4%

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 2,024 of the 3,410 delay minutes reported here. The split is drawn from 3,410 delay minutes reported on DL 526.

Cancellations are rare at 0.00%, below the national 1.81% and low enough to earn the plus on the grade. Almost no flights are called off; the risk here is arriving late, not not arriving.

Connections and routes

What a delay on this flight costs

Badly late arrivals are rare here: only 3.0% land an hour or more behind schedule, against 8.1% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.

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.

Every one of the 365 flights under DL 526 in the data flew ATL to SLC. 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. 365 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 526

For a booking, read DL 526 as 80.5% on time with 0.00% cancelled over 365 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