Flight number record

DL 544

Delta Air Lines · Detroit to Las Vegas

Route: DTW → LAS
Departs: 18:59
Flights: 286
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 544, check with Delta Air Lines.

DL 544 sits in the middle of the pack with a C+. About seven flights in ten arrive on time by the DOT's definition, 5 points worse than the national rate of 77.6%. The late ones land about an hour behind schedule. That rests on 286 flights, with a median arrival 2 minutes early.

The national on-time rate over the same period is 77.6%, so DL 544 runs 5 points behind the country as a whole. Across a thousand flights that is about 50 extra late arrivals.

On time

72.6%

Arrivals under 15 minutes late, of 285 completed flights

Avg delay

64 min

Across delayed arrivals only, not all flights

Cancelled

0.35%

National rate is 1.81%

1 hour+ late

11.6%

National rate is 8.1%

These figures cover 286 flights between July 2025 and June 2026. Beyond the headline rate, 11.6% 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 544 flies

DL 544 flies DTW to LAS without a single fixed slot. Its most common scheduled departure was 18:59, used on 95 of 286 flights, with 18:30 (89 flights) and 18:25 (30 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 18:5995 flights33.2%
Departs 18:3089 flights31.1%
Departs 18:2530 flights10.5%

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 18:59 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.2%, and DL 544 runs 4 points better at 72.6%. 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 544 next to DTW to LAS

Every carrier on DTW to LAS combined arrived on time 76.1% of the time across 2,843 flights, so DL 544 is 4 points behind it. Delta flew 1,897 flights on the same city pair under all its flight numbers, including this one, and those ran 75.9% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight trails by 9 points.

DL 544 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 544thin sample	286	72.6%	64 min	0.35%	C+
All Delta Air Lines on DTW–LAS	1,897	75.9%	60 min	0.53%	B+
All carriers on DTW–LAS	2,843	76.1%	56 min	0.49%	B+
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 544 quarter by quarter

DL 544 did not run the same all year. Its best quarter was Jul–Sep 2025 at 77.8% on time and its weakest Jan–Mar 2026 at 65.2%, a swing of 13 points on roughly 72 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 202563 flights77.8%
Oct–Dec 202544 flights70.5%
Jan–Mar 202689 flights65.2%
Apr–Jun 202690 flights77.5%

Scale runs 55% to 85%. Rows with fewer than 30 flights show a dash.

By weekday, DL 544 did best on Wednesday at 80.0% on time and worst on Monday at 63.0%. Each day rests on about 41 flights, so a gap of 17 points is worth noticing but could still narrow in another year.

Delay causes

Why DL 544 runs late

One category carries most of the weight here. Carrier accounts for 45% of the 4,963 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.

Carrier
45%
Late-arriving aircraft
26%
National Airspace System
23%
Extreme weather
6%

The largest share of delay minutes, 45%, 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 2,252 of the 4,963 delay minutes reported here. The split is drawn from 4,963 delay minutes reported on DL 544.

Cancellations are rare at 0.35%, below the national 1.81% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.

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. 11.6% 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.

At 1,749 miles this is transcontinental flying, and long routes get a quiet structural advantage. Scheduled block time on a flight this length carries more padding in absolute minutes, so a twenty-minute late departure often still becomes an on-time arrival. Read the on-time rate here as slightly flattering next to a short-haul route with the same operational quality.

The same number turns up on one other city pair in the data, including LAS to SLC (10), but none flew often enough under DL 544 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to DTW to LAS only.

One caution: this is a thin sample. 286 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 544

For a booking, read DL 544 as 72.6% on time with 0.35% cancelled over 286 flights. Those are rates from the past twelve months, not a forecast for any particular day.

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