Flight number record
DL 906
Delta Air Lines · Salt Lake City to Atlanta
- Route
- SLC → ATL
- Departs
- 13:20
- Flights
- 365
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 906, check with Delta Air Lines.
DL 906 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 77.3%. When something does go wrong the average delay runs a little over an hour. That rests on 365 flights, with a median arrival 7 minutes early.
Set against the rest of the country, DL 906's record is 7 points better than the US average of 77.3%. That gap is worth roughly 68 fewer late arrivals for every thousand flights.
Key figures
On time
84.1%
Arrivals under 15 minutes late, of 358 completed flights
Avg delay
79 min
Across delayed arrivals only, not all flights
Cancelled
0.55%
National rate is 1.89%
1 hour+ late
7.0%
National rate is 8.3%
These figures cover 365 flights between September 2025 and August 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.
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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 13:35 (57 flights) and 13:58 (41 flights) next.
- Departs 13:2078 flights21.4%
- Departs 13:3557 flights15.6%
- Departs 13:5841 flights11.2%
Scale runs 0% to 100%.
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 78.3%, and DL 906 runs 6 points better at 84.1%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
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Against the route
DL 906 next to SLC to ATL
Every carrier on SLC to ATL combined arrived on time 86.4% of the time across 2,974 flights, so DL 906 is 2 points behind it. Delta flew 2,968 flights on the same city pair under all its flight numbers, including this one, and those ran 86.5% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight beats by 3 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 906 | 365 | 84.1% | 79 min | 0.55% | B+ |
| All Delta Air Lines on SLC–ATL | 2,968 | 86.5% | 65 min | 0.57% | A+ |
| All carriers on SLC–ATL | 2,974 | 86.4% | 67 min | 0.57% | A+ |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | 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 Jul–Sep 2026 at 71.2%, a swing of 20 points on roughly 73 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 202530 flights90.0%
- Oct–Dec 202592 flights79.3%
- Jan–Mar 202690 flights90.7%
- Apr–Jun 202691 flights89.0%
- Jul–Sep 202662 flights71.2%
Scale runs 65% to 95%.
By weekday, DL 906 did best on Wednesday at 94.2% on time and worst on Monday at 75.0%. Each day rests on about 52 flights, so a gap of 19 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 906 runs when it is late
DL 906 often beats the schedule: 103 of 358 completed flights, 29%, arrived 15 minutes or more early. The 57 late arrivals split 14 under half an hour, 18 between 30 and 60 minutes, and 25 an hour or more.
- 15+ min early103 flights28.8%
- Within 15 min198 flights55.3%
- 15–29 min late14 flights3.9%
- 30–59 min late18 flights5.0%
- 1–2 hours late16 flights4.5%
- 2+ hours late9 flights2.5%
Scale runs 0% to 100%.
Share of 358 completed flights by arrival against schedule.
A late pushback is often recovered here: of 66 departures that left 15 minutes late or more, 21 still arrived on time. 12 flights left on time and still arrived late.
The worst days
Worst days for DL 906
The latest arrival of the period was on 23 November 2025, 9 hours 2 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 23 November 2025 | 9 hours 2 minutes | Carrier |
| 8 November 2025 | 5 hours 45 minutes | National Airspace System |
| 9 October 2025 | 4 hours 36 minutes | Late-arriving aircraft |
| 3 August 2026 | 3 hours 38 minutes | Carrier |
| 22 March 2026 | 3 hours 24 minutes | Carrier |
Delay causes
Why DL 906 runs late
Carrier accounts for 52% of the 4,523 delay minutes carriers reported here, and the remaining four split what is left.
- 52%Carrier
- 24%Late-arriving aircraft
- 22%National Airspace System
- 2%Extreme weather
The largest share of delay minutes, 52%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 2,334 of the 4,523 delay minutes reported here. The split is drawn from 4,523 delay minutes reported on DL 906.
Cancellations are rare at 0.55%, below the national 1.89% 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
7.0% of arrivals land an hour or more late, close to the national 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last a little over an hour, 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, read DL 906 as 84.1% on time with 0.55% cancelled over 365 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- SLC to ATL, every carrier and departure
- ATL to SLC, the return direction
- Delta Air Lines 907 on the same route94.8%
- Delta Air Lines 885 on the same route80.6%
- Delta Air Lines 897 on the same route92.0%
- Delta Air Lines 912 on the same route87.0%
- Delta Air Lines 905 on the same route84.8%
- Delta Air Lines 835 on the same route83.6%
- Salt Lake City International (SLC) delay statistics
- Hartsfield-Jackson Atlanta International (ATL) delay statistics
- Delta Air Lines on-time record
- Every Delta Air Lines flight number with a record
- The most and least reliable flight numbers in the US
- Worst months to fly in the US, ranked by the data
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, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.