Flight number record
DL 835
Delta Air Lines · Salt Lake City to Atlanta
- Route
- SLC → ATL
- Departs
- 09:55
- Flights
- 349
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 835, check with Delta Air Lines.
DL 835 lands a B, 6 points better than the national rate of 77.3%. About one flight in six arrives 15 minutes late or worse, and those flights are late by roughly 50 minutes on average. That rests on 349 flights, with a median arrival 5 minutes early.
Set against the rest of the country, DL 835's record is 6 points better than the US average of 77.3%. That gap is worth roughly 63 fewer late arrivals for every thousand flights.
Key figures
On time
83.6%
Arrivals under 15 minutes late, of 341 completed flights
Avg delay
48 min
Across delayed arrivals only, not all flights
Cancelled
1.15%
National rate is 1.89%
1 hour+ late
3.8%
National rate is 8.3%
These figures cover 349 flights between September 2025 and August 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.
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Schedule
When DL 835 flies
DL 835 flies SLC to ATL without a single fixed slot. Its most common scheduled departure was 09:55, used on 125 of 349 flights, with 09:25 (68 flights) and 09:46 (37 flights) next.
- Departs 09:55125 flights35.8%
- Departs 09:2568 flights19.5%
- Departs 09:4637 flights10.6%
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 09:55 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and DL 835 runs level with that at 83.6%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
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Against the route
DL 835 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 835 is 3 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 835thin sample | 349 | 83.6% | 48 min | 1.15% | 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 835 quarter by quarter
DL 835 did not run the same all year. Its best quarter was Oct–Dec 2025 at 96.2% on time and its weakest Jul–Sep 2026 at 65.5%, a swing of 31 points on roughly 70 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 202580 flights96.2%
- Jan–Mar 202686 flights78.3%
- Apr–Jun 202691 flights86.7%
- Jul–Sep 202662 flights65.5%
Scale runs 55% to 100%.
By weekday, DL 835 did best on Wednesday at 90.0% on time and worst on Saturday at 75.0%. Each day rests on about 50 flights, so a gap of 15 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 835 runs when it is late
The 56 late arrivals split 27 under half an hour, 16 between 30 and 60 minutes, and 13 an hour or more.
- 15+ min early68 flights19.9%
- Within 15 min217 flights63.6%
- 15–29 min late27 flights7.9%
- 30–59 min late16 flights4.7%
- 1–2 hours late10 flights2.9%
- 2+ hours late3 flights0.9%
Scale runs 0% to 100%.
Share of 341 completed flights by arrival against schedule.
6 of 36 late departures made up the time and arrived on time, 17% of them. In the other direction, 26 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at ATL.
The worst days
Worst days for DL 835
The latest arrival of the period was on 1 February 2026, 5 hours 13 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on four of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 1 February 2026 | 5 hours 13 minutes | Carrier |
| 10 August 2026 | 3 hours 20 minutes | Carrier |
| 10 July 2026 | 2 hours 35 minutes | Carrier |
| 18 February 2026 | 1 hour 56 minutes | Carrier |
| 7 July 2026 | 1 hour 40 minutes | Extreme weather |
Delay causes
Why DL 835 runs late
Carrier accounts for 53% of the 2,706 delay minutes carriers reported here, and the remaining four split what is left.
- 53%Carrier
- 32%National Airspace System
- 9%Extreme weather
- 6%Late-arriving aircraft
The largest share of delay minutes, 53%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 1,437 of the 2,706 delay minutes reported here. The split is drawn from 2,706 delay minutes reported on DL 835.
Cancellations sit at 1.15% against a national 1.89%, which is ordinary. Diversions add another 1.15%.
Connections and routes
What a delay on this flight costs
Badly late arrivals are rare here: only 3.8% land an hour or more behind schedule, against 8.3% 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.
The same number turns up on one other city pair in the data, including BOS to DFW (12), but none flew often enough under DL 835 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to SLC to ATL only.
One caution: this is a thin sample. 349 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 835
For a booking, read DL 835 as 83.6% on time with 1.15% cancelled over 349 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 906 on the same route84.1%
- 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%
- 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.