Flight number record

DL 549

Delta Air Lines · Atlanta to Las Vegas

Route: ATL → LAS
Departs: 13:00
Flights: 348
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 549, check with Delta Air Lines.

DL 549 lands a B+, level with the national rate of 77.6%. Roughly one flight in five arrives 15 minutes late or worse, and those flights are late by roughly 50 minutes on average. That is a workable record, not a spotless one. That rests on 348 flights, with a median arrival 3 minutes early.

On time

78.1%

Arrivals under 15 minutes late, of 347 completed flights

Avg delay

52 min

Across delayed arrivals only, not all flights

Cancelled

0.29%

National rate is 1.81%

1 hour+ late

5.8%

National rate is 8.1%

These figures cover 348 flights between July 2025 and June 2026. The median arrival is 3 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.

Schedule

When DL 549 flies

DL 549 flies ATL to LAS without a single fixed slot. Its most common scheduled departure was 13:00, used on 56 of 348 flights, with 12:15 (53 flights) and 12:20 (36 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 13:0056 flights16.1%
Departs 12:1553 flights15.2%
Departs 12:2036 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 13:00 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.8%, and DL 549 runs level with that at 78.1%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

DL 549 next to ATL to LAS

Every carrier on ATL to LAS combined arrived on time 75.9% of the time across 4,796 flights, so DL 549 is 2 points ahead of it. Delta flew 3,329 flights on the same city pair under all its flight numbers, including this one, and those ran 77.3% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight trails by 4 points.

DL 549 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 549thin sample	348	78.1%	52 min	0.29%	B+
All Delta Air Lines on ATL–LAS	3,329	77.3%	55 min	0.60%	B+
All carriers on ATL–LAS	4,796	75.9%	60 min	0.77%	B+
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 549 quarter by quarter

DL 549 did not run the same all year. Its best quarter was Oct–Dec 2025 at 86.1% on time and its weakest Jan–Mar 2026 at 74.1%, a swing of 12 points on roughly 87 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 flights76.1%
Oct–Dec 202579 flights86.1%
Jan–Mar 202686 flights74.1%
Apr–Jun 202691 flights76.9%

Scale runs 65% to 90%. Rows with fewer than 30 flights show a dash.

By weekday, DL 549 did best on Wednesday at 92.0% on time and worst on Saturday at 69.4%. 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 549 runs late

One category carries most of the weight here. Carrier accounts for 48% of the 3,973 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
48%
Late-arriving aircraft
27%
National Airspace System
22%
Extreme weather
2%

The largest share of delay minutes, 48%, 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 1,915 of the 3,973 delay minutes reported here. The split is drawn from 3,973 delay minutes reported on DL 549.

Cancellations are rare at 0.29%, 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

5.8% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last roughly 50 minutes, which a normal layover absorbs.

At 1,747 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 two other city pairs in the data, including LAS to ATL (36) and ATL to SJC (15), but none flew often enough under DL 549 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to ATL to LAS only.

One caution: this is a thin sample. 348 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 549

For a booking, read DL 549 as 78.1% on time with 0.29% cancelled over 348 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