Flight number record
DL 1513
Delta Air Lines · Boston to Orlando
- Route
- BOS → MCO
- Departs
- 20:20
- Flights
- 351
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 1513, check with Delta Air Lines.
DL 1513 draws a C. About one flight in three arrives at least 15 minutes late, and the typical late arrival is an hour and a half behind schedule. Build slack into anything you connect to. That rests on 351 flights, with a median arrival 2 minutes early.
The national on-time rate over the same period is 77.3%, so DL 1513 runs 12 points behind the country as a whole. Across a thousand flights that is about 115 extra late arrivals.
Key figures
On time
65.8%
Arrivals under 15 minutes late, of 345 completed flights
Avg delay
95 min
Across delayed arrivals only, not all flights
Cancelled
1.71%
National rate is 1.89%
1 hour+ late
17.4%
National rate is 8.3%
These figures cover 351 flights between September 2025 and August 2026. Beyond the headline rate, 17.4% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When DL 1513 flies
DL 1513 flies BOS to MCO without a single fixed slot. Its most common scheduled departure was 20:20, used on 53 of 351 flights, with 19:39 (36 flights) next.
- Departs 20:2053 flights15.1%
- Departs 19:3936 flights10.3%
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 20:20 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.1%, and DL 1513 runs 4 points worse at 65.8%. 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 1513 next to BOS to MCO
Every carrier on BOS to MCO combined arrived on time 69.5% of the time across 4,605 flights, so DL 1513 is 4 points behind it. Delta flew 1,257 flights on the same city pair under all its flight numbers, including this one, and those ran 75.5% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight trails by 15 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 1513thin sample | 351 | 65.8% | 95 min | 1.71% | C |
| All Delta Air Lines on BOS–MCO | 1,257 | 75.5% | 79 min | 2.23% | B |
| All carriers on BOS–MCO | 4,605 | 69.5% | 77 min | 3.17% | C− |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 1513 quarter by quarter
DL 1513 did not run the same all year. Its best quarter was Jan–Mar 2026 at 70.9% on time and its weakest Jul–Sep 2025 at 50.0%, a swing of 21 points on roughly 70 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 flights50.0%
- Oct–Dec 202586 flights66.3%
- Jan–Mar 202683 flights70.9%
- Apr–Jun 202691 flights68.9%
- Jul–Sep 202661 flights61.7%
Scale runs 40% to 75%.
By weekday, DL 1513 did best on Tuesday at 73.1% on time and worst on Sunday at 51.0%. Each day rests on about 50 flights, so a gap of 22 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 1513 runs when it is late
DL 1513 often beats the schedule: 103 of 345 completed flights, 30%, arrived 15 minutes or more early. When DL 1513 is late it tends to be very late: 60 of its 118 late arrivals were an hour or more behind, and 34 were two hours or more.
- 15+ min early103 flights29.9%
- Within 15 min124 flights35.9%
- 15–29 min late27 flights7.8%
- 30–59 min late31 flights9.0%
- 1–2 hours late26 flights7.5%
- 2+ hours late34 flights9.9%
Scale runs 0% to 100%.
Share of 345 completed flights by arrival against schedule.
38 of 145 late departures made up the time and arrived on time, 26% of them. 11 flights left on time and still arrived late.
The worst days
Worst days for DL 1513
The latest arrival of the period was on 26 January 2026, 15 hours 45 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on five of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 26 January 2026 | 15 hours 45 minutes | Carrier |
| 13 October 2025 | 15 hours 20 minutes | Carrier |
| 11 March 2026 | 5 hours 13 minutes | Carrier |
| 28 August 2026 | 4 hours 15 minutes | Carrier |
| 20 October 2025 | 3 hours 57 minutes | Carrier |
Delay causes
Why DL 1513 runs late
Late-arriving aircraft accounts for 51% of the 11,000 delay minutes carriers reported here, and the remaining four split what is left.
- 51%Late-arriving aircraft
- 39%Carrier
- 8%National Airspace System
- 2%Extreme weather
51% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 11,000 reported delay minutes here, that single category outweighs weather by 32 to one. The split is drawn from 11,246 delay minutes reported on DL 1513.
Cancellations sit at 1.71% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
Connections and routes
What a delay on this flight costs
17.4% 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 1,121 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.
Every one of the 351 flights under DL 1513 in the data flew BOS to MCO. 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. 351 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 1513
For a booking, DL 1513 is a flight to put a long connection behind. 17.4% 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
- BOS to MCO, every carrier and departure
- MCO to BOS, the return direction
- JetBlue Airways 451 on the same route52.2%
- JetBlue Airways 2251 on the same route71.8%
- JetBlue Airways 551 on the same route63.1%
- Delta Air Lines 1580 on the same route90.7%
- Boston Logan International (BOS) 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
- Why the first flight of the morning is statistically safest
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.