2,638 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

Leave before 9 am: 9 in 10 depart on time. After 4 pm it’s 3 in 5.

Best time to leave 7–8 am 93% arrive on time from MIA

Best single flight F9 2284 MIA 14:50 → SJU 17:26 · 77% on time Avoid AA 1364 MIA 19:16 → SJU 21:59 · 66% on time

Time of day × airport

Share of this route’s flights leaving within 15 minutes, by airport and scheduled departure hour, over Aug 2025 – Jul 2026. Blank: no flights then (or fewer than 40 in the year).

MIA

% of this route’s flights leaving within 15 min (small number: flights in the Jun 6 – Jul 31, 2026 schedule): 85+75–8465–7455–64under 55

Pick an hour to see this route’s flights leaving then.

Airlines on this route

Arriving within 15 minutes. Regional flights count under the airline that sells them. Pick an airline to see its flights.


American	2,109	78%	0.5%	70 min
Frontier	379	72%	1.6%	85 min
Spirit	150	60%	4.7%	112 min

Flights, best and worst

Flights in the Jun 6 – Jul 31, 2026 schedule that ran 150+ times in the year. Times are local. Pick a flight for its history.


F9 2284	MIA 14:50	SJU 17:26	77%
F9 3378	MIA 21:33	SJU 00:28	71%
AA 1364	MIA 19:16	SJU 21:59	66%

All 8 flights on this route →

Nonstops by airline and airport

Arriving within 15 minutes, Aug 2025 – Jul 2026. Pick a row to see that airline’s flights on that airport pair.


American	MIA	SJU	2h 39m	78%	0.5%	2,109	Flying now
Frontier	MIA	SJU	2h 37m	72%	1.6%	379	Flying now
Spirit	MIA	SJU	2h 35m	60%	4.7%	150	Not flying now

Flying on a particular day? Pick a date above and the same ranking uses our forecast odds for each flight that day: Tomorrow.

About this data: US DOT on-time records, Aug 2025 – Jul 2026, all US airlines; regional flights count under the airline that sells them. Schedules (which flights and connections exist, and their times) are as of Jun 6 – Jul 31, 2026; seasonal flights outside that window aren’t ranked. Rebuilt monthly. JSON