Airport month record

MIAAPR

Miami International in April 2026

Departures: 9,556
Month: April 2026
National, same month: 79.8%
Carriers: 9

Historical statistics for April 2026, not live status or a forecast for this year’s April. For today’s conditions at MIA, see live FAA status.

MIA in April sits in the middle of the pack with a B+. Close to three flights in four arrive on time by the DOT's definition, 5 points worse than the national rate of 79.8%. The late ones land about an hour behind schedule. That rests on 9,556 flights, of which Envoy Air flew 1,107 at 86.8% on time.

Envoy Air is the most reliable of the six carriers covered here at 86.8% on time across 1,107 flights.

On time

75.3%

Arrivals under 15 minutes late, of 9,486 completed departures

Avg delay

62 min

Across delayed arrivals only, not all flights

Cancelled

0.30%

Nationally in April: 0.90%

Whole year

73.8%

MIA across all twelve months

These figures cover 9,556 departures from Miami International in April 2026. On time means an arrival less than 15 minutes after the scheduled gate time, the DOT's threshold, and the national comparison uses every US departure in the same month rather than the whole year.

Against the year

April next to MIA's other months

Against MIA's own year, April ran 2 points better than the twelve-month rate of 73.8%, which makes it number six of twelve months, best first. Cancellations were unusually low for MIA in April, at 0.30% against 1.62% across the year. Either side of it, March ran 69.6% on time and May 75.3%, so a trip moved by a few weeks would have landed in a worse stretch.

MIA month by month
Month	Flights	On time	Avg delay	Cancelled	Grade
July 2025	9,079	63.6%	84 min	2.60%	D
August 2025	8,731	67.6%	77 min	0.86%	C+
September 2025	7,573	78.6%	70 min	0.36%	B+
October 2025	8,457	77.9%	70 min	0.37%	B+
November 2025	9,270	77.0%	67 min	1.95%	B
December 2025	10,099	75.2%	66 min	1.15%	B
January 2026	10,439	76.0%	77 min	5.01%	B−
February 2026	9,304	75.3%	64 min	1.74%	B
March 2026	10,460	69.6%	78 min	2.96%	C
April 2026 (this page)	9,556	75.3%	62 min	0.30%	B+
May 2026	9,296	75.3%	66 min	0.45%	B+
June 2026	8,797	74.2%	72 min	0.78%	C+

Departure window

The best time of day to leave MIA in April

Departure time matters more here than the choice of carrier. The gap between the best and worst window is 24 points, against 14 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.

5am–8am1,189 flights89.3%
8am–11am1,470 flights86.1%
11am–2pm906 flights76.5%
2pm–5pm1,845 flights75.7%
5pm–8pm1,941 flights65.2%
8pm–5am2,205 flights68.6%

Scale runs 55% to 95%. Rows with fewer than 30 flights show a dash.

Book the early departure. Flights leaving between 5am–8am arrive on time 89.3% of the time, against 65.2% for the evening window. That is 24 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 8pm–5am window is the busiest, with 2,205 flights scheduled in it.

Across the week, Friday is the strongest day at 81.4% on time and Sunday the weakest at 65.2%. 16 points is a smaller lever than departure hour, but it is free.

Carrier by carrier

Which airlines ran best at MIA in April

The choice of carrier is not cosmetic here. Envoy Air arrives on time 86.8% of the time; Southwest Airlines manages 72.6%. Sample sizes sit next to every figure, because a two-point gap across 497 flights means less than a ten-point one.

Carriers at MIA in April 2026
Airline	Flights	On time	Avg delay	Cancelled	Grade
American Airlines	5,405	73.0%	62 min	0.13%	C+
Envoy Air	1,107	86.8%	42 min	0.00%	A+
Delta Air Lines	1,067	75.5%	65 min	0.56%	B+
United Airlines	601	85.7%	73 min	0.17%	A+
Southwest Airlines	497	72.6%	50 min	0.20%	C+
Frontier Airlines	428	74.4%	81 min	0.70%	C+
Spirit Airlinesthin sample	342	62.2%	64 min	2.92%	D
Republic Airwaysthin sample	58	69.0%	76 min	0.00%	C+
Alaska Airlinesthin sample	51	76.0%	52 min	1.96%	B

The spread between Envoy and Southwest is 14 points, wide enough that it should decide the booking. On a hundred trips that is 14 more arrivals inside the on-time window.

Route by route

Busiest routes out of MIA in April

Routes from MIA in April 2026
Route	Flights	On time	Avg delay	Cancelled	Grade
MIA to ATL · Atlanta	572	76.2%	61 min	0.17%	B+
MIA to LGA · New York	516	69.5%	66 min	0.78%	C+
MIA to JFK · New York	408	72.1%	65 min	0.25%	C+
MIA to ORD · Chicago	400	76.7%	77 min	1.75%	B
MIA to DFW · Dallas-Fort Worth	378	71.0%	75 min	0.79%	C+
MIA to EWR · Newarkthin sample	355	80.7%	68 min	0.00%	B+
MIA to BOS · Bostonthin sample	333	69.2%	64 min	0.30%	C+
MIA to DCA · Washingtonthin sample	329	80.5%	65 min	0.00%	B+
MIA to CLT · Charlottethin sample	311	79.1%	55 min	0.00%	B+
MIA to IAH · Houstonthin sample	310	78.4%	82 min	0.97%	B+
MIA to PHL · Philadelphiathin sample	298	75.8%	88 min	0.00%	B+
MIA to MCO · Orlandothin sample	293	74.1%	64 min	0.00%	C+
MIA to LAX · Los Angelesthin sample	285	74.7%	63 min	0.00%	C+
MIA to SJU · San Juanthin sample	234	72.3%	66 min	0.43%	C+
MIA to TPA · Tampathin sample	227	70.5%	75 min	0.00%	C+
MIA to BNA · Nashvillethin sample	216	73.6%	53 min	0.00%	C+
MIA to AUS · Austinthin sample	210	71.3%	67 min	0.48%	C+
MIA to BWI · Baltimorethin sample	207	72.3%	50 min	0.48%	C+
MIA to RDU · Raleighthin sample	197	74.0%	65 min	0.51%	C+
MIA to DEN · Denverthin sample	195	82.8%	52 min	0.00%	B+
MIA to PHX · Phoenixthin sample	177	74.6%	65 min	0.00%	C+
MIA to DTW · Detroitthin sample	161	74.2%	60 min	1.24%	C
MIA to SFO · San Franciscothin sample	153	57.0%	54 min	0.00%	D+
MIA to MSY · New Orleansthin sample	120	74.8%	48 min	0.00%	C+
MIA to LAS · Las Vegasthin sample	118	69.5%	46 min	0.00%	C+

Delay causes

What held MIA up in April

One category carries most of the weight here. Late-arriving aircraft accounts for 45% of the 145,000 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.

Late-arriving aircraft
45%
Carrier
32%
National Airspace System
21%
Extreme weather
2%
Security
0%

45% 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 145,000 reported delay minutes here, that single category outweighs weather by 22 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 144,731 reported delay minutes.

Cancellations are rare at 0.30%, below the national 0.90% 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.

7.9% of arrivals land an hour or more late, close to the national 6.4%. 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 about an hour, which a normal layover absorbs.

What to do with this

Flying from MIA in April

For a April trip through MIA: expect 75.3% on time and 0.30% cancelled, going by April 2026. The 5am–8am window was the strongest part of the day.

Miami International (MIA), the whole year
MIA in July63.6%
MIA in August67.6%
MIA in September78.6%
MIA in October77.9%
MIA in November77.0%
MIA in December75.2%
MIA in January76.0%
MIA in February75.3%
MIA in March69.6%
MIA in May75.3%
MIA in June74.2%

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