Flight number record
DL 1735
Delta Air Lines · Atlanta to Orlando
- Route
- ATL → MCO
- Departs
- 20:15
- Flights
- 254
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 1735, check with Delta Air Lines.
DL 1735 draws a D. Roughly 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 254 flights, with a median arrival 3 minutes late.
The national on-time rate over the same period is 77.3%, so DL 1735 runs 14 points behind the country as a whole. Across a thousand flights that is about 141 extra late arrivals.
Key figures
On time
63.2%
Arrivals under 15 minutes late, of 250 completed flights
Avg delay
65 min
Across delayed arrivals only, not all flights
Cancelled
1.18%
National rate is 1.89%
1 hour+ late
12.8%
National rate is 8.3%
These figures cover 254 flights between September 2025 and August 2026. Beyond the headline rate, 12.8% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When DL 1735 flies
DL 1735 flies ATL to MCO without a single fixed slot. Its most common scheduled departure was 20:15, used on 86 of 254 flights, with 20:30 (60 flights) and 20:05 (43 flights) next.
- Departs 20:1586 flights33.9%
- Departs 20:3060 flights23.6%
- Departs 20:0543 flights16.9%
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 20:15 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.1%, and DL 1735 runs 7 points worse at 63.2%. 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 1735 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 1735 is 7 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 18 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 1735thin sample | 254 | 63.2% | 65 min | 1.18% | 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 1735 quarter by quarter
DL 1735 did not run the same all year. Its best quarter was Apr–Jun 2026 at 70.0% on time and its weakest Jul–Sep 2026 at 51.7%, a swing of 18 points on roughly 85 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.
- Oct–Dec 202512 flights—
- Jan–Mar 202690 flights66.3%
- Apr–Jun 202691 flights70.0%
- Jul–Sep 202661 flights51.7%
Scale runs 45% to 75%. Rows with fewer than 30 flights show a dash.
By weekday, DL 1735 did best on Tuesday at 80.6% on time and worst on Saturday at 47.2%. Each day rests on about 36 flights, so a gap of 33 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 1735 runs when it is late
The 92 late arrivals split 25 under half an hour, 35 between 30 and 60 minutes, and 32 an hour or more.
- 15+ min early21 flights8.4%
- Within 15 min137 flights54.8%
- 15–29 min late25 flights10.0%
- 30–59 min late35 flights14.0%
- 1–2 hours late21 flights8.4%
- 2+ hours late11 flights4.4%
Scale runs 0% to 100%.
Share of 250 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 94 departures that left 15 minutes late or more, only 11 made it up before arrival. 9 flights left on time and still arrived late.
The worst days
Worst days for DL 1735
The latest arrival of the period was on 16 March 2026, 4 hours 50 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The five worst days are spread across March, July and February, with no single month standing out.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 16 March 2026 | 4 hours 50 minutes | Late-arriving aircraft |
| 18 July 2026 | 4 hours 37 minutes | Carrier |
| 17 March 2026 | 3 hours 20 minutes | Carrier |
| 27 February 2026 | 3 hours 15 minutes | National Airspace System |
| 27 July 2026 | 2 hours 51 minutes | Late-arriving aircraft |
Delay causes
Why DL 1735 runs late
Carrier accounts for 46% of the 5,944 delay minutes carriers reported here, and the remaining four split what is left.
- 46%Carrier
- 30%Late-arriving aircraft
- 21%National Airspace System
- 3%Extreme weather
The largest share of delay minutes, 46%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 2,757 of the 5,944 delay minutes reported here. The split is drawn from 5,944 delay minutes reported on DL 1735.
Cancellations sit at 1.18% against a national 1.89%, which is ordinary. Diversions add another 0.39%.
Connections and routes
What a delay on this flight costs
12.8% 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 two other city pairs in the data, including FLL to ATL (47) and ATL to FLL (47), but none flew often enough under DL 1735 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. 254 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 1735
For a booking, DL 1735 is a flight to put a long connection behind. 12.8% 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 1742 on the same route55.5%
- Delta Air Lines 664 on the same route84.0%
- 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.