Flight number record

DL 1742

Delta Air Lines · Atlanta to Orlando

Route: ATL → MCO
Departs: 15:55
Flights: 364
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 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 55.3% of flights arrive inside the 15-minute window, 22 points worse than the national rate of 77.6%. Late arrivals average about an hour. Treat any tight connection here as a coin flip. That rests on 364 flights, with a median arrival 9 minutes late.

The national on-time rate over the same period is 77.6%, so DL 1742 runs 22 points behind the country as a whole. Across a thousand flights that is about 223 extra late arrivals.

On time

55.3%

Arrivals under 15 minutes late, of 358 completed flights

Avg delay

64 min

Across delayed arrivals only, not all flights

Cancelled

1.10%

National rate is 1.81%

1 hour+ late

15.6%

National rate is 8.1%

These figures cover 364 flights between July 2025 and June 2026. Beyond the headline rate, 15.6% 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 1742 flies

DL 1742 flies ATL to MCO without a single fixed slot. Its most common scheduled departure was 15:55, used on 121 of 364 flights, with 16:00 (82 flights) and 16:05 (37 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 15:55121 flights33.2%
Departs 16:0082 flights22.5%
Departs 16:0537 flights10.2%

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 15:55 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 72.4%, and DL 1742 runs 17 points worse at 55.3%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

DL 1742 next to ATL to MCO

Every carrier on ATL to MCO combined arrived on time 70.7% of the time across 8,211 flights, so DL 1742 is 15 points behind it. Delta flew 5,465 flights on the same city pair under all its flight numbers, including this one, and those ran 70.7% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight trails by 26 points.

DL 1742 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 1742thin sample	364	55.3%	64 min	1.10%	D
All Delta Air Lines on ATL–MCO	5,465	70.7%	64 min	1.17%	C
All carriers on ATL–MCO	8,211	70.7%	73 min	1.36%	C
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 1742 quarter by quarter

DL 1742 did not run the same all year. Its best quarter was Oct–Dec 2025 at 63.3% on time and its weakest Jul–Sep 2025 at 50.5%, a swing of 13 points on roughly 91 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 202592 flights50.5%
Oct–Dec 202591 flights63.3%
Jan–Mar 202690 flights50.6%
Apr–Jun 202691 flights56.7%

Scale runs 40% to 70%. Rows with fewer than 30 flights show a dash.

By weekday, DL 1742 did best on Monday at 68.6% on time and worst on Saturday at 42.9%. Each day rests on about 52 flights, so a gap of 26 points is worth noticing but could still narrow in another year.

Delay causes

Why DL 1742 runs late

One category carries most of the weight here. National Airspace System accounts for 43% of the 10,000 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.

National Airspace System
43%
Carrier
36%
Late-arriving aircraft
16%
Extreme weather
6%

The largest share of delay minutes, 36%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 3,666 of the 10,000 delay minutes reported here. The split is drawn from 10,210 delay minutes reported on DL 1742.

Cancellations sit at 1.10% against a national 1.81%, which is ordinary. Diversions add another 0.55%.

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. 15.6% 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 same number turns up on one other city pair in the data, including MCO to ATL (220), 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. 15.6% 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