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

No clear winner: Delta’s ATL → EYW flights land within a few points of 83% on time whatever the hour.

Nonstops


Delta	ATL	EYW	1h 58m	83%	1.4%	1,476	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 →	ATL 05:20 → MIA 07:15AA 1135	2h 40m Miami	MIA 09:55 → EYW 10:55AA 3515 · flown by Envoy	5h 35m	93%	92%
American Details →	ATL 07:00 → MIA 09:05AA 3190	3h 05m Miami	MIA 12:10 → EYW 13:14AA 3518 · flown by Envoy	6h 14m	97%	86%
American Details →	ATL 06:00 → PHL 08:11AA 3270	2h 19m Philadelphia	PHL 10:30 → EYW 13:41AA 1898	7h 40m	99%	81%
United Details →	ATL 06:07 → EWR 08:25UA 299	1h 53m Newark	EWR 10:18 → EYW 13:30UA 1418	7h 23m	97%	77%
American Details →	ATL 11:11 → CLT 12:36AA 5039 · flown by PSA	1h 14m Charlotte	CLT 13:50 → EYW 16:11AA 3519 · flown by Envoy	5h 00m	86%	73%
American Details →	ATL 05:00 → CLT 06:25AA 5507 · flown by PSA	3h 35m Charlotte	CLT 10:00 → EYW 12:14AA 1826	7h 14m	96%	71%
American Details →	ATL 09:43 → DFW 11:13AA 3390 · flown by Envoy	1h 49m Dallas-Fort Worth	DFW 13:02 → EYW 16:54AA 1814	7h 11m	97%	58%

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

PHL · 1h 15m · leaves 07:05 7%

MIA · 1h 03m · leaves 09:00 15%

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.


Delta DL 1579 ATL 12:54 → MIA American AA 3517 MIA 18:11 → EYW Connection details →	3h 16m	6h 18m	99%	85%
Delta DL 2836 ATL 07:30 → MIA American AA 3518 MIA 12:10 → EYW Connection details →	2h 40m	5h 44m	98%	84%
Delta DL 3190 ATL 10:10 → CLT American AA 3519 CLT 13:50 → EYW Connection details →	2h 24m	6h 01m	96%	82%

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