Flight number record

DL 1513

Delta Air Lines · Boston to Orlando

Route: BOS → MCO
Departs: 20:20
Flights: 351
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 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 1 minute early.

The national on-time rate over the same period is 77.6%, so DL 1513 runs 12 points behind the country as a whole. Across a thousand flights that is about 124 extra late arrivals.

On time

65.2%

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 1.81%

1 hour+ late

17.7%

National rate is 8.1%

These figures cover 351 flights between July 2025 and June 2026. Beyond the headline rate, 17.7% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.

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 36 of 351 flights, with 19:39 (36 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 20:2036 flights10.3%
Departs 19:3936 flights10.3%

Scale runs 0% to 100%. Rows with fewer than 30 flights show a dash.

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 70.5%, and DL 1513 runs 5 points worse at 65.2%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.

Against the route

DL 1513 next to BOS to MCO

Every carrier on BOS to MCO combined arrived on time 70.1% of the time across 4,606 flights, so DL 1513 is 5 points behind it. Delta flew 1,257 flights on the same city pair under all its flight numbers, including this one, and those ran 75.4% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight trails by 16 points.

DL 1513 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 1513thin sample	351	65.2%	95 min	1.71%	C
All Delta Air Lines on BOS–MCO	1,257	75.4%	80 min	2.15%	B
All carriers on BOS–MCO	4,606	70.1%	77 min	2.74%	C
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	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 55.6%, a swing of 15 points on roughly 88 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 202591 flights55.6%
Oct–Dec 202586 flights66.3%
Jan–Mar 202683 flights70.9%
Apr–Jun 202691 flights68.9%

Scale runs 45% to 75%. Rows with fewer than 30 flights show a dash.

By weekday, DL 1513 did best on Tuesday at 73.6% on time and worst on Sunday at 51.0%. Each day rests on about 50 flights, so a gap of 23 points is worth noticing but could still narrow in another year.

Delay causes

Why DL 1513 runs late

One category carries most of the weight here. Late-arriving aircraft accounts for 55% of the 11,000 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.

Late-arriving aircraft
55%
Carrier
35%
National Airspace System
9%
Extreme weather
2%

55% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 11,000 reported delay minutes here, that single category outweighs weather by 35 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 11,453 delay minutes reported on DL 1513.

Cancellations sit at 1.71% against a national 1.81%, which is ordinary. Diversions add another 0.00%.

Connections and routes

What a delay on this flight costs

For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 17.7% of arrivals land a full hour or more behind schedule, against 8.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum 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. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.

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. 17.7% 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.

Where to go next

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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.

Key figures