Flight number record

DL 553

Delta Air Lines · Las Vegas to Los Angeles

Route: LAS → LAX
Departs: 06:00
Flights: 365
Period: September 2025 to August 2026

Historical statistics for September 2025 to August 2026, not live status. For today’s DL 553, check with Delta Air Lines.

DL 553 earns an A+. Nearly every flight arrives inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 16 points better than the national rate of 77.3%. When something does go wrong the average delay runs a little over an hour. That rests on 365 flights, with a median arrival 13 minutes early.

Set against the rest of the country, DL 553's record is 16 points better than the US average of 77.3%. That gap is worth roughly 158 fewer late arrivals for every thousand flights.

On time

93.1%

Arrivals under 15 minutes late, of 363 completed flights

Avg delay

72 min

Across delayed arrivals only, not all flights

Cancelled

0.55%

National rate is 1.89%

1 hour+ late

2.2%

National rate is 8.3%

These figures cover 365 flights between September 2025 and August 2026. The median arrival is 13 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.

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Schedule

When DL 553 flies

DL 553 flies LAS to LAX without a single fixed slot. Its most common scheduled departure was 06:00, used on 89 of 365 flights, with 06:15 (66 flights) next.

Departs 06:0089 flights24.4%
Departs 06:1566 flights18.1%

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 06:00 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and DL 553 runs 4 points better at 93.1%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.

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Against the route

DL 553 next to LAS to LAX

Every carrier on LAS to LAX combined arrived on time 77.9% of the time across 8,203 flights, so DL 553 is 15 points ahead of it. Delta flew 1,733 flights on the same city pair under all its flight numbers, including this one, and those ran 83.8% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight beats by 12 points.

DL 553 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 553	365	93.1%	72 min	0.55%	A+
All Delta Air Lines on LAS–LAX	1,733	83.8%	76 min	0.92%	B+
All carriers on LAS–LAX	8,203	77.9%	63 min	0.73%	B+
Delta Air Lines, whole network	1,039,517	81.1%	71 min	1.74%	B

Across the year

DL 553 quarter by quarter

Quarter by quarter DL 553 held fairly steady: 90.0% in Jul–Sep 2025, 95.7% in Oct–Dec 2025, 92.1% in Jan–Mar 2026, 93.3% in Apr–Jun 2026 and 91.9% in Jul–Sep 2026. A spread of 6 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202530 flights90.0%
Oct–Dec 202592 flights95.7%
Jan–Mar 202690 flights92.1%
Apr–Jun 202691 flights93.3%
Jul–Sep 202662 flights91.9%

Scale runs 80% to 100%.

By weekday, DL 553 ranged from 86.5% on Sunday to 98.1% on Wednesday. With about 52 flights behind each day, a spread of 12 points is inside normal variation, so the day you fly is not worth changing for this flight.

Arrival by arrival

How late DL 553 runs when it is late

DL 553 often beats the schedule: 152 of 363 completed flights, 42%, arrived 15 minutes or more early. The 25 late arrivals split 11 under half an hour, 6 between 30 and 60 minutes, and 8 an hour or more.

15+ min early152 flights41.9%
Within 15 min186 flights51.2%
15–29 min late11 flights3.0%
30–59 min late6 flights1.7%
1–2 hours late1 flights0.3%
2+ hours late7 flights1.9%

Scale runs 0% to 100%.

Share of 363 completed flights by arrival against schedule.

Time lost at the gate mostly stays lost. Of 21 departures that left 15 minutes late or more, only 2 made it up before arrival. Only 6 left on time and still arrived late.

The worst days

Worst days for DL 553

The latest arrival of the period was on 19 February 2026, 3 hours 47 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on four of the five worst days.

The latest arrivals of DL 553 in the period
Date	Arrived late by	Largest filed cause
19 February 2026	3 hours 47 minutes	Carrier
20 June 2026	3 hours 37 minutes	Carrier
19 April 2026	3 hours 18 minutes	Carrier
1 August 2026	3 hours 5 minutes	Extreme weather
7 February 2026	2 hours 55 minutes	Carrier

Delay causes

Why DL 553 runs late

Carrier accounts for 76% of the 1,794 delay minutes carriers reported here, and the remaining four split what is left.

Carrier
76%
National Airspace System
13%
Extreme weather
11%

Extreme weather accounts for 11% of delay minutes, well above the single-digit share typical across the system. Weather delays are lumpy: they arrive as whole bad days rather than as a steady drag, so the quarterly figures above are the more useful view of the risk. The national share is 6%, so this operation carries roughly 1.9 times the usual weather exposure. The split is drawn from 1,794 delay minutes reported on DL 553.

Cancellations are rare at 0.55%, below the national 1.89% 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

Badly late arrivals are rare here: only 2.2% land an hour or more behind schedule, against 8.3% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.

Every one of the 365 flights under DL 553 in the data flew LAS to LAX. 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. 365 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 553

For a booking, DL 553 has one of the better records a US domestic flight can show: 93.1% on time and 0.55% cancelled. That is a base rate, not a promise about any single 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, September 2025 to August 2026. Last updated 22 October 2026; recomputed monthly. How this data is collected.

Key figures