Flight number record
DL 746
Delta Air Lines · Atlanta to Denver
- Route
- ATL → DEN
- Departs
- 18:59
- Flights
- 361
- Period
- July 2025 to June 2026
Historical statistics for July 2025 to June 2026, not live status. For today’s DL 746, check with Delta Air Lines.
DL 746 draws a C+. About one flight in three arrives at least 15 minutes late, and the typical late arrival is about an hour behind schedule. Build slack into anything you connect to. That rests on 361 flights, with a median arrival 1 minute late.
The national on-time rate over the same period is 77.6%, so DL 746 runs 11 points behind the country as a whole. Across a thousand flights that is about 113 extra late arrivals.
Key figures
On time
66.3%
Arrivals under 15 minutes late, of 359 completed flights
Avg delay
65 min
Across delayed arrivals only, not all flights
Cancelled
0.55%
National rate is 1.81%
1 hour+ late
12.0%
National rate is 8.1%
These figures cover 361 flights between July 2025 and June 2026. Beyond the headline rate, 12.0% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.
Schedule
When DL 746 flies
DL 746 flies ATL to DEN without a single fixed slot. Its most common scheduled departure was 18:59, used on 107 of 361 flights, with 19:48 (59 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.
- Departs 18:59107 flights29.6%
- Departs 19:4859 flights16.3%
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 18:59 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.2%, and DL 746 runs level with that at 66.3%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
Against the route
DL 746 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 746 is 11 points behind 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 trails by 15 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 746thin sample | 361 | 66.3% | 65 min | 0.55% | C+ |
| 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 746 quarter by quarter
DL 746 did not run the same all year. Its best quarter was Oct–Dec 2025 at 75.8% on time and its weakest Jul–Sep 2025 at 50.0%, a swing of 26 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 202592 flights50.0%
- Oct–Dec 202592 flights75.8%
- Jan–Mar 202686 flights69.8%
- Apr–Jun 202691 flights70.0%
Scale runs 40% to 80%. Rows with fewer than 30 flights show a dash.
By weekday, DL 746 ranged from 62.7% on Friday to 71.2% on Wednesday. With about 52 flights behind each day, a spread of 9 points is inside normal variation, so the day you fly is not worth changing for this flight.
Delay causes
Why DL 746 runs late
Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 7,824 reported delay minutes.
- 38%National Airspace System
- 32%Carrier
- 24%Late-arriving aircraft
- 7%Extreme weather
38% of delay minutes are charged to the National Airspace System: air traffic volume, runway configuration, ground stops. No carrier can price its way out of that, which is why airport choice moves the number here more than carrier choice does. That is 2,940 minutes out of 7,824, against a national NAS share of 21%. The split is drawn from 7,824 delay minutes reported on DL 746.
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
For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 12.0% of arrivals land a full hour or more behind schedule, against 8.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum here, and two hours if the onward flight is on a separate ticket.
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 FLL to MSP (3) and MSP to FLL (3), but none flew often enough under DL 746 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. 361 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 746
For a booking, DL 746 is a flight to put a long connection behind. 12.0% of its completed flights arrived an hour or more late, which a short layover will not absorb. If the onward flight is on a separate ticket, the risk sits with you.
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 706 on the same route85.5%
- 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
- How often a connection fails at the major US hubs
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.