Flight number record
DL 1505
Delta Air Lines · Orlando to Atlanta
- Route
- MCO → ATL
- Departs
- 09:00
- Flights
- 356
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 1505, check with Delta Air Lines.
DL 1505 earns an A. Close to nine flights in ten arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 12 points better than the national rate of 77.3%. When something does go wrong the average delay runs about an hour. That rests on 356 flights, with a median arrival 10 minutes early.
Set against the rest of the country, DL 1505's record is 12 points better than the US average of 77.3%. That gap is worth roughly 116 fewer late arrivals for every thousand flights.
Key figures
On time
88.9%
Arrivals under 15 minutes late, of 352 completed flights
Avg delay
66 min
Across delayed arrivals only, not all flights
Cancelled
1.12%
National rate is 1.89%
1 hour+ late
2.8%
National rate is 8.3%
These figures cover 356 flights between September 2025 and August 2026. The median arrival is 10 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.
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Schedule
When DL 1505 flies
DL 1505 flies MCO to ATL without a single fixed slot. Its most common scheduled departure was 09:00, used on 254 of 356 flights, with 09:05 (87 flights) next.
- Departs 09:00254 flights71.3%
- Departs 09:0587 flights24.4%
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 09:00 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and DL 1505 runs 5 points better at 88.9%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
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Against the route
DL 1505 next to MCO to ATL
Every carrier on MCO to ATL combined arrived on time 74.9% of the time across 8,259 flights, so DL 1505 is 14 points ahead of it. Delta flew 5,531 flights on the same city pair under all its flight numbers, including this one, and those ran 78.3% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight beats by 8 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 1505thin sample | 356 | 88.9% | 66 min | 1.12% | A |
| All Delta Air Lines on MCO–ATL | 5,531 | 78.3% | 88 min | 1.39% | B |
| All carriers on MCO–ATL | 8,259 | 74.9% | 80 min | 1.65% | C |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 1505 quarter by quarter
DL 1505 did not run the same all year. Its best quarter was Apr–Jun 2026 at 96.7% on time and its weakest Jan–Mar 2026 at 83.0%, a swing of 14 points on roughly 89 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 202521 flights—
- Oct–Dec 202592 flights85.7%
- Jan–Mar 202690 flights83.0%
- Apr–Jun 202691 flights96.7%
- Jul–Sep 202662 flights90.3%
Scale runs 75% to 100%. Rows with fewer than 30 flights show a dash.
By weekday, DL 1505 ranged from 82.7% on Sunday to 94.0% on Wednesday. With about 51 flights behind each day, a spread of 11 points is inside normal variation, so the day you fly is not worth changing for this flight.
Arrival by arrival
How late DL 1505 runs when it is late
DL 1505 often beats the schedule: 111 of 352 completed flights, 32%, arrived 15 minutes or more early. The 39 late arrivals split 14 under half an hour, 15 between 30 and 60 minutes, and 10 an hour or more.
- 15+ min early111 flights31.5%
- Within 15 min202 flights57.4%
- 15–29 min late14 flights4.0%
- 30–59 min late15 flights4.3%
- 1–2 hours late7 flights2.0%
- 2+ hours late3 flights0.9%
Scale runs 0% to 100%.
Share of 352 completed flights by arrival against schedule.
7 of 33 late departures made up the time and arrived on time, 21% of them. 13 flights left on time and still arrived late.
The worst days
Worst days for DL 1505
The latest arrival of the period was on 13 October 2025, 11 hours 50 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). On three of the five worst days the largest share was filed as national airspace system delay.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 13 October 2025 | 11 hours 50 minutes | Carrier |
| 28 April 2026 | 3 hours 16 minutes | National Airspace System |
| 7 December 2025 | 2 hours 52 minutes | National Airspace System |
| 5 January 2026 | 1 hour 58 minutes | National Airspace System |
| 28 October 2025 | 1 hour 46 minutes | Carrier |
Delay causes
Why DL 1505 runs late
Carrier accounts for 59% of the 2,591 delay minutes carriers reported here, and the remaining four split what is left.
- 59%Carrier
- 39%National Airspace System
- 2%Extreme weather
The largest share of delay minutes, 59%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 1,524 of the 2,591 delay minutes reported here. The split is drawn from 2,591 delay minutes reported on DL 1505.
Cancellations sit at 1.12% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
Connections and routes
What a delay on this flight costs
Badly late arrivals are rare here: only 2.8% land an hour or more behind schedule, against 8.3% 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.
Every one of the 356 flights under DL 1505 in the data flew MCO to ATL. The number was not reused on any other city pair, which makes this a clean record of one route.
One caution: this is a thin sample. 356 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 1505
For a booking, DL 1505 has one of the better records a US domestic flight can show: 88.9% on time and 1.12% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- MCO to ATL, every carrier and departure
- ATL to MCO, the return direction
- Delta Air Lines 1658 on the same route79.9%
- Delta Air Lines 1213 on the same route83.1%
- Delta Air Lines 1494 on the same route94.2%
- Delta Air Lines 664 on the same route79.2%
- Delta Air Lines 1150 on the same route58.0%
- Delta Air Lines 2080 on the same route89.6%
- Orlando International (MCO) delay statistics
- Hartsfield-Jackson Atlanta International (ATL) 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, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.