Flight number record

DL 906

Delta Air Lines · Salt Lake City to Atlanta

Route: SLC → ATL
Departs: 13:20
Flights: 365
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 906, check with Delta Air Lines.

DL 906 earns an A+. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 9 points better than the national rate of 77.6%. When something does go wrong the average delay runs an hour and a half. That rests on 365 flights, with a median arrival 9 minutes early.

Set against the rest of the country, DL 906's record is 9 points better than the US average of 77.6%. That gap is worth roughly 88 fewer late arrivals for every thousand flights.

On time

86.4%

Arrivals under 15 minutes late, of 360 completed flights

Avg delay

82 min

Across delayed arrivals only, not all flights

Cancelled

0.55%

National rate is 1.81%

1 hour+ late

6.1%

National rate is 8.1%

These figures cover 365 flights between July 2025 and June 2026. The median arrival is 9 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 906 flies

DL 906 flies SLC to ATL without a single fixed slot. Its most common scheduled departure was 13:20, used on 78 of 365 flights, with 13:30 (41 flights) and 13:58 (41 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 13:2078 flights21.4%
Departs 13:3041 flights11.2%
Departs 13:5841 flights11.2%

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 13:20 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.8%, and DL 906 runs 8 points better at 86.4%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

DL 906 next to SLC to ATL

Every carrier on SLC to ATL combined arrived on time 87.3% of the time across 2,972 flights, so DL 906 is about level with it. Delta flew 2,966 flights on the same city pair under all its flight numbers, including this one, and those ran 87.4% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight beats by 5 points.

DL 906 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 906	365	86.4%	82 min	0.55%	A+
All Delta Air Lines on SLC–ATL	2,966	87.4%	63 min	0.54%	A+
All carriers on SLC–ATL	2,972	87.3%	65 min	0.54%	A+
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 906 quarter by quarter

DL 906 did not run the same all year. Its best quarter was Jan–Mar 2026 at 90.7% on time and its weakest Oct–Dec 2025 at 79.3%, a swing of 11 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 flights86.8%
Oct–Dec 202592 flights79.3%
Jan–Mar 202690 flights90.7%
Apr–Jun 202691 flights89.0%

Scale runs 70% to 95%. Rows with fewer than 30 flights show a dash.

By weekday, DL 906 did best on Friday at 96.1% on time and worst on Monday at 76.9%. Each day rests on about 52 flights, so a gap of 19 points is worth noticing but could still narrow in another year.

Delay causes

Why DL 906 runs late

One category carries most of the weight here. Carrier accounts for 55% of the 4,020 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
55%
Late-arriving aircraft
25%
National Airspace System
19%
Extreme weather
1%

The largest share of delay minutes, 55%, 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 2,222 of the 4,020 delay minutes reported here. The split is drawn from 4,020 delay minutes reported on DL 906.

Cancellations are rare at 0.55%, 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

6.1% 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 an hour and a half, which a normal layover absorbs.

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 906 in the data flew SLC to ATL. 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 906

For a booking, DL 906 has one of the better records a US domestic flight can show: 86.4% on time and 0.55% cancelled. That is a base rate, not a promise about any single 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