LAX → MIA Flight Reliability

Right now

Origin · LAXNo disruption reported

Aviation weather is not currently a factor.

Updated 07:53 UTC

Los Angeles airport profile →

Destination · MIANo disruption reported

Aviation weather is not currently a factor.

Updated 07:53 UTC

Miami airport profile →

Route reliability

July 2023 – July 2026

Route Reliability Score

71/ 100Good

Better than 65% of comparable major US routes (4,598 compared)

Calculated from 10,505 flights. How this is calculated

On-time arrivals

78.6%

8,179 of 10,402

Cancellation rate

0.56%

59 cancelled

Median arrival delay

-6 min

Average 5.9 min

Severe delays

6.0%

60+ minutes late

Delay when late

68 min

Average, when 15+ min late

Flights analyzed

10,505

3 carriers

LAX → MIA arrives on time 78.6% of the time; the return trip, MIA → LAX, arrives on time 74.0% of the time, a 4.7-point gap between the two directions of the same city pair.

LAX → MIA spends 29.2 minutes on the ground on a 2,342-mile trip: 18.9 minutes from pushback to wheels-up at LAX and 10.4 minutes from touchdown to gate at MIA.

Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – July 2026

Why LAX → MIA flights are cancelled

July 2023 – July 2026

LAX → MIA cancelled 59 of 10,505 scheduled flights — about 1 in every 178. The reason filed most often was extreme weather, 55.9% of the cancellations coded on this route — about 1 in every 318 scheduled flights.

Share of cancellations

Weather55.9%

Airline40.7%

Air traffic3.4%

Security0.0%

Of 59 cancelled departures carrying a reason code.

What each reason means

Extreme weather1 in 318

Conditions the carrier judged severe enough to stop the flight: a blizzard, a hurricane, a line of thunderstorms.

33 cancellations, 55.9% of the total.

The airline1 in 438

Crew, maintenance, aircraft cleaning, baggage or fueling: what BTS counts as within the carrier’s own control.

24 cancellations, 40.7% of the total.

The air traffic system1 in 5,253

Airport capacity, air traffic control flow programs, heavy traffic and ordinary bad weather. A system decision, not the airline’s.

2 cancellations, 3.4% of the total.

Security—

A terminal evacuation, a security breach, screening equipment failure, or screening queues over 29 minutes.

0 cancellations, 0.0% of the total.

Reason codes are the operating airline’s own filing with US DOT, not an independent finding of fault. Ordinary bad weather is filed under air traffic, so weather’s full share is larger than its bar.

59 coded cancellations were recorded on LAX → MIA; the section appears from 50.

When it goes wrong

July 2023 – July 2026

One arrival in ten is worse than

38 min late

against a median of 6 min early

Arrived an hour or more late6.0%

Typical delay when late68 min

Cancelled0.56%

Landed somewhere else0.42%

Percentiles over 10,505 operations; cancelled and diverted flights are counted separately.

Will your connection be tight enough?

Layovers at MIA after arriving from LAX.

Connection buffer and chance of missing by layover length, LAX → MIA arrivals
Connection time	Chance of missing	Reads as
30 min	38%	Likely to miss
45 min	21%	High risk
60 min	12%	Some risk
90 min	5.8%	Some risk
120 min	3.6%	Low risk

This is one leg of a connection. Gate changes and the next flight's own schedule matter too. And a connection can fail before delay is even the question — this route cancels 0.56% of the time and diverts 0.42% of the time, which a late arrival never shows up in.

Chance of missing is the share of 10,402 arrivals on this route that landed later than the connection time less 30 minutes to reach the next gate.

The worst tenth of arrivals on this route land at least 38 minutes late (90th-percentile gate arrival delay), over 10,505 operations.

Any other layover length: connection checker.

Best time to fly

LAX → MIA flights departing 5–9 AM arrived on time 86.0% of the time, against 68.9% for 3–6 PM departures, a gap of 17.1 percentage points.

By day and hour

On-time arrival rate for each weekday and scheduled departure hour, in local time at the departure airport (LAX).

Hour of departure matters more than day of the week: hourly averages sit a typical 5.7 points from the route-wide rate, weekday averages 2.2 points.

On-time arrival rate for LAX to MIA by weekday and scheduled departure hour, local time. Each button reads out one slot.
Hour	Monday	Tuesday	Wednesday	Thursday	Friday	Saturday	Sunday
6 AM–7 AM
7 AM–8 AM
8 AM–9 AM
9 AM–10 AM
10 AM–11 AM
11 AM–12 PM
12 PM–1 PM
1 PM–2 PM
2 PM–3 PM
3 PM–4 PM
4 PM–5 PM
5 PM–6 PM
6 PM–7 PM
7 PM–8 PM
8 PM–9 PM
9 PM–10 PM
10 PM–11 PM
11 PM–12 AM

On-time rate, % · stronger color, fewer on time

65–69
70–74
75–79
80–84
85–89
90–94

Fewer than 120 flights, not scored

Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026 · On time is arrival within 15 minutes of schedule. Cells round to whole percentages; the table shows one decimal.

No slot is named best or worst: too few reach 500 flights. Departures before 6 AM (284 flights) are not drawn: no slot in those hours has enough flights to score.

View as tableHide table

On-time arrival rate (%) with flights beneath, by scheduled departure hour and weekday for LAX to MIA. A dash means fewer than 120 flights, which are not scored.
Hour	Monday	Tuesday	Wednesday	Thursday	Friday	Saturday	Sunday
6 AM–7 AM	91.6% on time145 flights	90.8% on time143 flights	87.7% on time142 flights	88.0% on time144 flights	91.7% on time145 flights	82.5% on time144 flights	81.7% on time143 flights
7 AM–8 AM	55 flights, too few to score	58 flights, too few to score	61 flights, too few to score	56 flights, too few to score	57 flights, too few to score	68 flights, too few to score	58 flights, too few to score
8 AM–9 AM	90.1% on time123 flights	86.2% on time123 flights	87.6% on time122 flights	85.4% on time125 flights	79.8% on time124 flights	79.7% on time135 flights	87.3% on time122 flights
9 AM–10 AM	76.5% on time152 flights	81.9% on time151 flights	81.0% on time149 flights	74.8% on time150 flights	76.7% on time153 flights	68.9% on time122 flights	75.7% on time151 flights
10 AM–11 AM	71.8% on time180 flights	75.0% on time177 flights	70.9% on time175 flights	71.4% on time178 flights	74.0% on time177 flights	72.6% on time148 flights	72.0% on time178 flights
11 AM–12 PM	71 flights, too few to score	71 flights, too few to score	68 flights, too few to score	66 flights, too few to score	70 flights, too few to score	55 flights, too few to score	68 flights, too few to score
12 PM–1 PM	110 flights, too few to score	115 flights, too few to score	116 flights, too few to score	113 flights, too few to score	103 flights, too few to score	114 flights, too few to score	106 flights, too few to score
1 PM–2 PM	115 flights, too few to score	85.2% on time122 flights	72.4% on time123 flights	75.4% on time122 flights	71.8% on time124 flights	67.8% on time122 flights	67.2% on time122 flights
2 PM–3 PM	28 flights, too few to score	26 flights, too few to score	25 flights, too few to score	26 flights, too few to score	26 flights, too few to score	26 flights, too few to score	28 flights, too few to score
3 PM–4 PM	24 flights, too few to score	23 flights, too few to score	21 flights, too few to score	21 flights, too few to score	21 flights, too few to score	21 flights, too few to score	21 flights, too few to score
4 PM–5 PM	0 flights, too few to score	0 flights, too few to score	0 flights, too few to score	0 flights, too few to score	0 flights, too few to score	0 flights, too few to score	0 flights, too few to score
5 PM–6 PM	0 flights, too few to score	0 flights, too few to score	0 flights, too few to score	0 flights, too few to score	0 flights, too few to score	0 flights, too few to score	0 flights, too few to score
6 PM–7 PM	0 flights, too few to score	0 flights, too few to score	0 flights, too few to score	0 flights, too few to score	0 flights, too few to score	0 flights, too few to score	0 flights, too few to score
7 PM–8 PM	0 flights, too few to score	0 flights, too few to score	0 flights, too few to score	0 flights, too few to score	0 flights, too few to score	0 flights, too few to score	0 flights, too few to score
8 PM–9 PM	31 flights, too few to score	29 flights, too few to score	32 flights, too few to score	33 flights, too few to score	32 flights, too few to score	30 flights, too few to score	30 flights, too few to score
9 PM–10 PM	86.2% on time124 flights	84.1% on time126 flights	84.4% on time122 flights	82.5% on time120 flights	78.9% on time123 flights	77.7% on time123 flights	84.0% on time125 flights
10 PM–11 PM	78.1% on time154 flights	87.0% on time139 flights	85.5% on time138 flights	82.9% on time149 flights	78.5% on time159 flights	80.1% on time142 flights	73.4% on time158 flights
11 PM–12 AM	77.4% on time160 flights	81.4% on time163 flights	84.2% on time161 flights	78.4% on time163 flights	77.0% on time167 flights	80.9% on time158 flights	80.1% on time163 flights

By departure window

5–9 AM86.0%

9 AM–12 PM74.2%

12–3 PM71.8%

3–6 PM68.9%

6–9 PM78.3%

9 PM–5 AM81.3%

By departure hour

12 AM

3 AM

6 AM

9 AM

12 PM

3 PM

6 PM

9 PM

Why LAX → MIA runs late

July 2023 – July 2026

The airline39.3%

crew, maintenance, boarding and fueling, all within the carrier’s control

Late-arriving aircraft37.6%

the inbound aircraft was late, so this flight started late

Air traffic control21.7%

airspace and airport capacity, including weather-driven flow control

Weather1.0%

weather severe enough to stop this flight specifically

Security0.3%

screening or terminal security incidents

Share of the delay minutes US DOT attributed to each cause for LAX → MIA. Only delays of 15 minutes or more are attributed.

How this route holds up in bad weather

July 2023 – July 2026

The harder-hit end is MIA, where the flight lands. Its figure counts departures from MIA, so it says more about how that airport copes than about this route. Bad weather cancels 3.3 times the normal rate at MIA against 1.3 times at LAX. Cancelled in bad weather against normal hours: LAX 1.0% against 0.8%, MIA 4.5% against 1.3%. Flights that did leave MIA in bad weather arrived on time 50.6% of the time, against 74.1% in normal hours.

Bad weather and normal hours at the airports

Scheduled departures, July 2023 – July 2026

Departures from LAX and MIA in hours of bad weather and in normal hours
Departures from	LAX	MIA
Cancelled in bad weather	1.0%	4.5%
Cancelled in normal hours	0.8%	1.3%
Arrived on time, bad weather	78.9%	50.6%
Arrived on time, normal hours	81.4%	74.1%
Departures in bad weather	60,639	15,746

American Airlines (0.8% cancelled against 1.1% for the other carriers at LAX) cancelled fewer departures from LAX in bad weather than the other carriers there did in the same months. None of the route’s other carriers was clearly worse.

This route’s airlines in bad weather at LAX

All departures from LAX

Cancellation rates in bad weather at LAX for the airlines that fly LAX to MIA, against the other carriers at LAX in the same months
Airline	Bad-weather departures	Cancelled	Other carriers
American Airlines	9,554	0.8%below the others	1.1%
Delta Air Lines	11,619	0.9%about level	1.0%
JetBlue	2,801	1.0%about level	1.0%

These are airport figures, not route figures: every scheduled departure from LAX and MIA, to any destination, in hours the weather report called bad. The airline rows count each carrier’s departures from LAX on every route.

Weather source and limits. In full: LAX (airlines), MIA, What Weather Costs Each Airport, Who Cancels More When the Weather Turns, Airports That Change Places When Weather Turns.

Airlines on this route

Carriers with at least 200 flights, by the airline that operated each one.

Airlines on this route
Carrier	Flights	On time	Cancelled	Median delay	Severe
American Airlines	8,555	79.0%	0.54%	-6 min	6.1%
Delta Air Lines	1,290	76.0%	0.85%	-3 min	4.1%
JetBlue	660	78.6%	0.30%	-7 min	7.2%

American Airlines flew 81.4% of the 10,505 flights listed.

American Airlines arrived on time 3.0 percentage points more often than Delta Air Lines on this route.

Flights on this route

Flight numbers with at least 600 operations here and still on the schedule.

Flights on this route
Flight	Scheduled	Operations	On time
DL811 Delta Air Lines	9:35 AM	1,036	77.0%
AA315 American Airlines	6:00 AM	622	88.2%

Weekly and seasonal patterns

By day of week

Mon79.5%

Tue82.4%

Wed80.4%

Thu78.4%

Fri77.8%

Sat75.8%

Sun76.0%

Tuesday is historically the most reliable day and Saturday the least, a gap of 6.6 percentage points.

By month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

March is historically the weakest month and October the strongest, a spread of 14.8 percentage points.

Reliability over time

July 2023 – July 2026

24

25

26

Over the most recent 12 months (2025-08 to 2026-07), on-time arrivals averaged 78.0% against 80.5% in the 12 months before — declining by 2.5 percentage points.

Data and methodology

Calculated by FlyerIntel from 10,505 LAX → MIA flight records from the US DOT Bureau of Transportation Statistics, covering July 2023 – July 2026. Late means 15 or more minutes past scheduled arrival; cancelled and diverted flights are left out of on-time rates.

Full methodology · Data sources · Report a problem

Analysis last recomputed September 26, 2026

LAX airport MIA airport Return direction MIA → LAX

LAX→MIA

Right now

Route reliability

Why LAX → MIA flights are cancelled

Share of cancellations

What each reason means

When it goes wrong

Will your connection be tight enough?

Best time to fly

By day and hour

By departure window

By departure hour

Why LAX → MIA runs late

How this route holds up in bad weather

Bad weather and normal hours at the airports

This route’s airlines in bad weather at LAX

Airlines on this route

Flights on this route

Weekly and seasonal patterns

By day of week

By month

Reliability over time

Data and methodology