Itineraries flown on 20+ days in the Jun 6 – Jul 31, 2026 schedule · each leg’s record Aug 2025 – Jul 2026

No clear winner: American’s MIA → EYW flights land within a few points of 86% on time whatever the hour.

Nonstops


American	MIA	EYW	1h 01m	86%	0.4%	1,250	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

Ranked by chance you reach Key West on time. Total trip = scheduled departure to arrival, layover included. Layovers up to 4 hours. Pick a connection for the details.


American Details →	MIA 09:55 → CLT 12:05AA 840	1h 45m Charlotte	CLT 13:50 → EYW 16:11AA 3519 · flown by Envoy	6h 16m	100%	87%
Delta Details →	MIA 06:00 → ATL 08:05DL 1249	3h 26m Atlanta	ATL 11:31 → EYW 13:28DL 1472	7h 24m	99%	83%
American Details →	MIA 06:40 → ORD 09:08AA 581	2h 12m Chicago	ORD 11:20 → EYW 15:41AA 3996 · flown by Envoy	9h 01m	97%	77%
American Details →	MIA 06:45 → PHL 09:38AA 2129	52m Philadelphia	PHL 10:30 → EYW 13:41AA 1898	6h 55m	91%	76%
Delta Details →	MIA 10:40 → ATL 12:48DL 2836	2h 37m Atlanta	ATL 15:25 → EYW 17:23DL 2168	6h 43m	97%	74%
Delta Details →	MIA 12:02 → ATL 14:09DL 1510	3h 44m Atlanta	ATL 17:53 → EYW 19:53DL 2815	7h 51m	99%	74%
American Details →	MIA 06:21 → CLT 08:35AA 2187	1h 25m Charlotte	CLT 10:00 → EYW 12:14AA 1826	5h 53m	94%	71%
American Details →	MIA 09:00 → DFW 11:12AA 1227	1h 50m Dallas-Fort Worth	DFW 13:02 → EYW 16:54AA 1814	7h 54m	95%	57%

Same layover, different day-part

How often the first flight arrives too late to connect (45 min minimum), for one-ticket layovers of 45–80 minutes.

Morning

ATL · 1h 11m · leaves 08:17 5%

PHL · 52m · leaves 06:45 9%

Delays build through the day, so an afternoon first leg eats the layover. A short connection is fine early in the morning and a gamble later on.

Mixing airlines

One ticketMiss it and the airline rebooks you; bags go through. 45 min is enough.

Separate ticketsMiss it and you buy a new ticket. Re-check bags, clear security again: we require 90 min.


American AA 581 MIA 06:40 → ORD United UA 3690 ORD 10:55 → EYW Connection details →	1h 47m	8h 39m	88%	76%
American AA 512 MIA 07:45 → ATL Delta DL 1472 ATL 11:31 → EYW Connection details →	1h 43m	5h 39m	87%	73%
Frontier F9 3059 MIA 11:19 → ATL Delta DL 2168 ATL 15:25 → EYW Connection details →	1h 51m	6h 04m	78%	61%

Rank all connections, any airlines →

Regional partners count as the airline that sells them: SkyWest flying Delta Connection is one Delta ticket.

How these are worked out. Makes the connection: share of the last year’s flights where the first flight arrived with at least 45 minutes to spare (90 on separate tickets). Arrives on time: first flight not cancelled × connection made × second flight not cancelled and arriving within 15 minutes. Not yet counted: the second flight also leaving late (which helps), gate-to-gate distance at the hub, and rebooking after a missed connection.

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