Flight number record

DL 450

Delta Air Lines · Miami to Los Angeles

Route: MIA → LAX
Departs: 07:50
Flights: 365
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 450, check with Delta Air Lines.

DL 450 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 7 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 365 flights, with a median arrival 9 minutes early.

Set against the rest of the country, DL 450's record is 7 points better than the US average of 77.6%. That gap is worth roughly 72 fewer late arrivals for every thousand flights.

On time

84.8%

Arrivals under 15 minutes late, of 362 completed flights

Avg delay

94 min

Across delayed arrivals only, not all flights

Cancelled

0.55%

National rate is 1.81%

1 hour+ late

5.0%

National rate is 8.1%

These figures cover 365 flights between July 2025 and June 2026. The median arrival is 9 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 450 flies

DL 450 flies MIA to LAX without a single fixed slot. Its most common scheduled departure was 07:50, used on 73 of 365 flights. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 07:5073 flights20.0%

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 07:50 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and DL 450 runs 5 points worse at 84.8%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.

Against the route

DL 450 next to MIA to LAX

Every carrier on MIA to LAX combined arrived on time 75.2% of the time across 3,245 flights, so DL 450 is 10 points ahead of it. Across its whole network Delta Air Lines managed 81.6%, which this flight beats by 3 points.

DL 450 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 450	365	84.8%	94 min	0.55%	B+
All Delta Air Lines on MIA–LAX	494	79.9%	77 min	1.21%	B
All carriers on MIA–LAX	3,245	75.2%	69 min	0.59%	B+
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 450 quarter by quarter

Quarter by quarter DL 450 held fairly steady: 85.9% in Jul–Sep 2025, 85.6% in Oct–Dec 2025, 82.2% in Jan–Mar 2026 and 85.6% in Apr–Jun 2026. A spread of 4 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202592 flights85.9%
Oct–Dec 202592 flights85.6%
Jan–Mar 202690 flights82.2%
Apr–Jun 202691 flights85.6%

Scale runs 75% to 90%. Rows with fewer than 30 flights show a dash.

By weekday, DL 450 ranged from 78.8% on Sunday to 90.0% on Saturday. With about 52 flights behind each day, a spread of 11 points is inside normal variation, so the day you fly is not worth changing for this flight.

Delay causes

Why DL 450 runs late

One category carries most of the weight here. Late-arriving aircraft accounts for 50% of the 5,183 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.

Late-arriving aircraft
50%
Carrier
37%
National Airspace System
11%
Extreme weather
1%

50% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 5,183 reported delay minutes here, that single category outweighs weather by 40 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 5,183 delay minutes reported on DL 450.

Cancellations are rare at 0.55%, 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

5.0% 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 2,342 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.

Every one of the 365 flights under DL 450 in the data flew MIA 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 450

For a booking, read DL 450 as 84.8% on time with 0.55% cancelled over 365 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