Flight number record
DL 746
Delta Air Lines · Atlanta to Denver
- Route
- ATL → DEN
- Departs
- 18:59
- Flights
- 361
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 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 right on schedule.
The national on-time rate over the same period is 77.3%, so DL 746 runs 10 points behind the country as a whole. Across a thousand flights that is about 95 extra late arrivals.
Key figures
On time
67.8%
Arrivals under 15 minutes late, of 357 completed flights
Avg delay
60 min
Across delayed arrivals only, not all flights
Cancelled
1.11%
National rate is 1.89%
1 hour+ late
10.9%
National rate is 8.3%
These figures cover 361 flights between September 2025 and August 2026. Beyond the headline rate, 10.9% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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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 85 of 361 flights, with 18:35 (60 flights) and 19:48 (59 flights) next.
- Departs 18:5985 flights23.5%
- Departs 18:3560 flights16.6%
- Departs 19:4859 flights16.3%
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 18:59 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.0%, and DL 746 runs level with that at 67.8%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
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Against the route
DL 746 next to ATL to DEN
Every carrier on ATL to DEN combined arrived on time 78.0% of the time across 5,594 flights, so DL 746 is 10 points behind it. Delta flew 2,807 flights on the same city pair under all its flight numbers, including this one, and those ran 79.0% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight trails by 13 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 746thin sample | 361 | 67.8% | 60 min | 1.11% | C |
| All Delta Air Lines on ATL–DEN | 2,807 | 79.0% | 52 min | 1.21% | B |
| All carriers on ATL–DEN | 5,594 | 78.0% | 61 min | 1.11% | B |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | 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 2026 at 46.7%, a swing of 29 points on roughly 72 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 flights73.3%
- Oct–Dec 202592 flights75.8%
- Jan–Mar 202686 flights69.8%
- Apr–Jun 202691 flights70.0%
- Jul–Sep 202662 flights46.7%
Scale runs 40% to 80%.
By weekday, DL 746 did best on Saturday at 76.6% on time and worst on Sunday at 58.0%. 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 746 runs when it is late
The 115 late arrivals split 37 under half an hour, 39 between 30 and 60 minutes, and 39 an hour or more.
- 15+ min early79 flights22.1%
- Within 15 min163 flights45.7%
- 15–29 min late37 flights10.4%
- 30–59 min late39 flights10.9%
- 1–2 hours late29 flights8.1%
- 2+ hours late10 flights2.8%
Scale runs 0% to 100%.
Share of 357 completed flights by arrival against schedule.
16 of 104 late departures made up the time and arrived on time, 15% of them. In the other direction, 27 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 DEN.
The worst days
Worst days for DL 746
The latest arrival of the period was on 6 March 2026, 5 hours 32 minutes behind schedule; most of its delay minutes were filed as national airspace system delay. The five worst days are spread across March, August, June, July and April, with no single month standing out.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 6 March 2026 | 5 hours 32 minutes | National Airspace System |
| 14 August 2026 | 5 hours 9 minutes | National Airspace System |
| 18 June 2026 | 3 hours 43 minutes | Late-arriving aircraft |
| 10 July 2026 | 3 hours 20 minutes | Carrier |
| 17 April 2026 | 3 hours 3 minutes | Late-arriving aircraft |
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 6,915 reported delay minutes.
- 38%National Airspace System
- 33%Carrier
- 24%Late-arriving aircraft
- 5%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 2,615 minutes out of 6,915, against a national NAS share of 21%. The split is drawn from 6,915 delay minutes reported on DL 746.
Cancellations sit at 1.11% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
Connections and routes
What a delay on this flight costs
10.9% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection 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.
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 one of the weaker ways to fly ATL to DEN: 10 points below the route as a whole. If the schedule allows, compare it with the other departures listed on the route page before settling on this one.
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 route66.7%
- United Airlines 235 on the same route78.5%
- Delta Air Lines 706 on the same route84.7%
- Frontier Airlines 3293 on the same route81.2%
- Delta Air Lines 530 on the same route80.5%
- United Airlines 340 on the same route91.1%
- 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, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.