Carrier route record

DLMSY→LAX

Delta Air Lines · New Orleans to Los Angeles

Flights: 959
Period: July 2025 to June 2026
Share of route: 64%
Carriers: 3

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

Delta on MSY to LAX earns a B+. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 6 points better than the national rate of 77.6%. When something does go wrong the average delay runs an hour and a half. That rests on 959 flights, with a median arrival 12 minutes early.

Set against the rest of the country, Delta's MSY to LAX record is 6 points better than the US average of 77.6%. That gap is worth roughly 64 fewer late arrivals for every thousand flights.

On time

84.0%

Arrivals under 15 minutes late, of 952 completed flights

Avg delay

85 min

Across delayed arrivals only, not all flights

Cancelled

0.52%

National rate is 1.81%

Whole route

80.1%

Every carrier on MSY to LAX, 1,499 flights

These figures cover 959 flights between July 2025 and June 2026. The median arrival is 12 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.

Carrier by carrier

Delta against every carrier on MSY to LAX

Delta flew 959 of the 1,499 flights on MSY to LAX, most of the route. Its 84.0% on time is 4 points better than the route as a whole, which runs 80.1%. Ranked by on-time rate it is first of three carriers on the route, where the range runs from Delta at 84.0% to Southwest at 69.4%. Two of those carriers flew fewer than 365 flights here, so treat their positions as rough.

Only one carrier clears this site's 365-flight floor here, so there is no comparison to draw. The table below is the full picture.

On-time performance by carrier on MSY to LAX
Airline	Flights	On time	Avg delay	Cancelled	Grade
Delta Air Lines (this page)	959	84.0%	85 min	0.52%	B+
Spirit Airlinesthin sample	179	80.7%	90 min	1.12%	B
Southwest Airlinesthin sample	361	69.4%	51 min	0.00%	C+

Flight by flight

Delta flight numbers on MSY to LAX

DL 208506:3092.8% · 364 flights

Departure window

When Delta runs best on this route

Departure time matters more here than the choice of carrier. The gap between the best and worst window is 22 points, against half a point between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.

5am–8am340 flights92.9%
8am–11am24 flights—
11am–2pm—
2pm–5pm340 flights81.3%
5pm–8pm174 flights77.0%
8pm–5am81 flights71.2%

Scale runs 65% to 100%. Rows with fewer than 30 flights show a dash.

Book the early departure. Flights leaving between 5am–8am arrive on time 92.9% of the time, against 71.2% for the overnight window. That is 22 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 5am–8am window is the busiest, with 340 flights scheduled in it.

Across the year

Delta on MSY to LAX through the year

Darker means more delays. Figures are on-time percentages.September best, May worst

September is the best month on the calendar at 90.9% on time. Shoulder season thins the schedule and takes the summer weather with it, and the operation gets its margin back. October was the busiest month here, with 88 flights.

Across the week, Thursday is the strongest day at 88.9% on time and Monday the weakest at 76.2%. 13 points is a smaller lever than departure hour, but it is free.

Delay causes

Why Delta runs late on this route

One category carries most of the weight here. Carrier accounts for 56% of the 13,000 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.

Carrier
56%
Late-arriving aircraft
33%
National Airspace System
10%
Extreme weather
2%

The largest share of delay minutes, 56%, 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 7,205 of the 13,000 delay minutes reported here. The split is drawn from 12,914 reported delay minutes.

The practical consequence: the 5am–8am departure is the one that starts clean. Its aircraft has no earlier leg to be late from, which is exactly why that window shows 92.9% on time here.

Cancellations are rare at 0.52%, 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 stage length

What a delay here costs

5.0% 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 an hour and a half, which a normal layover absorbs.

At 1,671 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 return leg runs 81.8% on time across 959 flights, within 2 points of this direction. The two legs are scored separately because they usually differ; on this city pair they happen not to.

One caution: this is a thin sample. 959 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 Delta on MSY to LAX

Put together: treat all of this as provisional. 959 flights over twelve months is enough to clear this site's floor and not enough to be confident to better than a couple of points. The 84.0% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 952 completed flights over 12 months sit behind that.

Where to go next

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