Flight number record
DL 706
Delta Air Lines · Atlanta to Denver
- Route
- ATL → DEN
- Departs
- 11:40
- Flights
- 358
- Period
- July 2025 to June 2026
Historical statistics for July 2025 to June 2026, not live status. For today’s DL 706, check with Delta Air Lines.
DL 706 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 8 points better than the national rate of 77.6%. When something does go wrong the average delay runs about 50 minutes. That rests on 358 flights, with a median arrival 6 minutes early.
Set against the rest of the country, DL 706's record is 8 points better than the US average of 77.6%. That gap is worth roughly 79 fewer late arrivals for every thousand flights.
Key figures
On time
85.5%
Arrivals under 15 minutes late, of 358 completed flights
Avg delay
49 min
Across delayed arrivals only, not all flights
Cancelled
0.00%
National rate is 1.81%
1 hour+ late
3.1%
National rate is 8.1%
These figures cover 358 flights between July 2025 and June 2026. The median arrival is 6 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 706 flies
DL 706 flies ATL to DEN without a single fixed slot. Its most common scheduled departure was 11:40, used on 63 of 358 flights, with 12:15 (60 flights) and 12:16 (59 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.
- Departs 11:4063 flights17.6%
- Departs 12:1560 flights16.8%
- Departs 12:1659 flights16.5%
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 11:40 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.8%, and DL 706 runs 7 points better at 85.5%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
Against the route
DL 706 next to ATL to DEN
Every carrier on ATL to DEN combined arrived on time 77.6% of the time across 5,589 flights, so DL 706 is 8 points ahead of it. Delta flew 2,805 flights on the same city pair under all its flight numbers, including this one, and those ran 78.1% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight beats by 4 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 706thin sample | 358 | 85.5% | 49 min | 0.00% | A+ |
| All Delta Air Lines on ATL–DEN | 2,805 | 78.1% | 52 min | 1.11% | B |
| All carriers on ATL–DEN | 5,589 | 77.6% | 60 min | 1.02% | B |
| Delta Air Lines, whole network | 1,038,570 | 81.6% | 71 min | 1.62% | B |
Across the year
DL 706 quarter by quarter
DL 706 did not run the same all year. Its best quarter was Apr–Jun 2026 at 90.1% on time and its weakest Oct–Dec 2025 at 78.3%, a swing of 12 points on roughly 90 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 202586 flights88.4%
- Oct–Dec 202592 flights78.3%
- Jan–Mar 202689 flights85.4%
- Apr–Jun 202691 flights90.1%
Scale runs 70% to 95%. Rows with fewer than 30 flights show a dash.
By weekday, DL 706 did best on Wednesday at 96.2% on time and worst on Sunday at 78.4%. Each day rests on about 51 flights, so a gap of 18 points is worth noticing but could still narrow in another year.
Delay causes
Why DL 706 runs late
One category carries most of the weight here. Carrier accounts for 47% of the 2,566 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.
- 47%Carrier
- 31%National Airspace System
- 15%Late-arriving aircraft
- 7%Extreme weather
The largest share of delay minutes, 47%, 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 1,198 of the 2,566 delay minutes reported here. The split is drawn from 2,566 delay minutes reported on DL 706.
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 3.1% 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.
The 1,199 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.
The same number turns up on two other city pairs in the data, including DEN to ATL (111) and SEA to GEG (1), but none flew often enough under DL 706 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to ATL to DEN only.
One caution: this is a thin sample. 358 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 706
For a booking, DL 706 has one of the better records a US domestic flight can show: 85.5% on time and 0.00% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- ATL to DEN, every carrier and departure
- DEN to ATL, the return direction
- Delta Air Lines 519 on the same route64.8%
- United Airlines 235 on the same route80.2%
- Frontier Airlines 3293 on the same route79.2%
- Delta Air Lines 746 on the same route66.3%
- Delta Air Lines 530 on the same route81.6%
- Delta Air Lines 493 on the same route75.4%
- Hartsfield-Jackson Atlanta International (ATL) delay statistics
- Denver International (DEN) 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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.