Flight number record
DL 1742
Delta Air Lines · Atlanta to Orlando
- Route
- ATL → MCO
- Departs
- 16:00
- Flights
- 364
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 1742, check with Delta Air Lines.
DL 1742 earns a D, which is as low as this site's scale goes for a reason. Only 55.5% of flights arrive inside the 15-minute window, 22 points worse than the national rate of 77.3%. Late arrivals average about an hour. Treat any tight connection here as a coin flip. That rests on 364 flights, with a median arrival 8 minutes late.
The national on-time rate over the same period is 77.3%, so DL 1742 runs 22 points behind the country as a whole. Across a thousand flights that is about 218 extra late arrivals.
Key figures
On time
55.5%
Arrivals under 15 minutes late, of 357 completed flights
Avg delay
67 min
Across delayed arrivals only, not all flights
Cancelled
1.37%
National rate is 1.89%
1 hour+ late
18.5%
National rate is 8.3%
These figures cover 364 flights between September 2025 and August 2026. Beyond the headline rate, 18.5% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When DL 1742 flies
DL 1742 flies ATL to MCO without a single fixed slot. Its most common scheduled departure was 16:00, used on 109 of 364 flights, with 15:55 (100 flights) next.
- Departs 16:00109 flights29.9%
- Departs 15:55100 flights27.5%
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 16:00 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 71.9%, and DL 1742 runs 16 points worse at 55.5%. 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 1742 next to ATL to MCO
Every carrier on ATL to MCO combined arrived on time 70.3% of the time across 8,267 flights, so DL 1742 is 15 points behind it. Delta flew 5,534 flights on the same city pair under all its flight numbers, including this one, and those ran 70.5% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight trails by 26 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 1742thin sample | 364 | 55.5% | 67 min | 1.37% | D |
| All Delta Air Lines on ATL–MCO | 5,534 | 70.5% | 65 min | 1.32% | C |
| All carriers on ATL–MCO | 8,267 | 70.3% | 75 min | 1.58% | C |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 1742 quarter by quarter
DL 1742 did not run the same all year. Its best quarter was Jul–Sep 2025 at 70.0% on time and its weakest Jul–Sep 2026 at 41.7%, a swing of 28 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 flights70.0%
- Oct–Dec 202591 flights63.3%
- Jan–Mar 202690 flights50.6%
- Apr–Jun 202691 flights56.7%
- Jul–Sep 202662 flights41.7%
Scale runs 35% to 75%.
By weekday, DL 1742 did best on Wednesday at 72.5% on time and worst on Saturday at 38.8%. Each day rests on about 52 flights, so a gap of 34 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 1742 runs when it is late
The 159 late arrivals split 46 under half an hour, 47 between 30 and 60 minutes, and 66 an hour or more.
- 15+ min early10 flights2.8%
- Within 15 min188 flights52.7%
- 15–29 min late46 flights12.9%
- 30–59 min late47 flights13.2%
- 1–2 hours late44 flights12.3%
- 2+ hours late22 flights6.2%
Scale runs 0% to 100%.
Share of 357 completed flights by arrival against schedule.
17 of 136 late departures made up the time and arrived on time, 13% of them. In the other direction, 40 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 MCO.
The worst days
Worst days for DL 1742
The latest arrival of the period was on 7 December 2025, 6 hours 50 minutes behind schedule; most of its delay minutes were filed as extreme weather. The five worst days are spread across December, June, February and October, with no single month standing out.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 7 December 2025 | 6 hours 50 minutes | Extreme weather |
| 14 June 2026 | 6 hours 23 minutes | Late-arriving aircraft |
| 1 February 2026 | 3 hours 30 minutes | National Airspace System |
| 27 October 2025 | 3 hours 14 minutes | National Airspace System |
| 24 February 2026 | 3 hours 9 minutes | Carrier |
Delay causes
Why DL 1742 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 11,000 reported delay minutes.
- 41%National Airspace System
- 34%Carrier
- 19%Late-arriving aircraft
- 5%Extreme weather
41% 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 4,398 minutes out of 11,000, against a national NAS share of 21%. The split is drawn from 10,661 delay minutes reported on DL 1742.
Cancellations sit at 1.37% against a national 1.89%, which is ordinary. Diversions add another 0.55%.
Connections and routes
What a delay on this flight costs
18.5% 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 same number turns up on one other city pair in the data, including MCO to ATL (239), but none flew often enough under DL 1742 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to ATL to MCO only.
One caution: this is a thin sample. 364 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 1742
For a booking, DL 1742 is a flight to put a long connection behind. 18.5% 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 MCO, every carrier and departure
- MCO to ATL, the return direction
- Delta Air Lines 1658 on the same route83.4%
- Delta Air Lines 1030 on the same route80.2%
- Delta Air Lines 1213 on the same route86.9%
- Delta Air Lines 1497 on the same route57.1%
- Delta Air Lines 664 on the same route84.0%
- Delta Air Lines 1150 on the same route61.3%
- Hartsfield-Jackson Atlanta International (ATL) delay statistics
- Orlando International (MCO) 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.