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

Connect in the morning. The same one-hour layover misses 4% of the time at 11 am and 23% of the time at 8 pm.

Nonstops


Delta	SJU	ATL	3h 56m	91%	0.9%	1,627	Flying now
Frontier	SJU	ATL	4h 20m	55%	2.1%	375	Flying now
Spirit	SJU	ATL	3h 20m	25%	6.5%	93	Not flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


United Details →	SJU 02:05 → IAH 06:01UA 2495	1h 19m Houston	IAH 07:20 → ATL 10:39UA 1030	8h 34m	95%	87%
Delta Details →	SJU 07:05 → JFK 11:01DL 1854	2h 09m New York	JFK 13:10 → ATL 15:45DL 2342	8h 40m	98%	85%
United Details →	SJU 07:20 → IAD 11:21UA 2022	1h 14m Dulles	IAD 12:35 → ATL 14:34UA 471	7h 14m	98%	83%
American Details →	SJU 00:58 → DFW 05:00AA 2742	2h 17m Dallas-Fort Worth	DFW 07:17 → ATL 10:28AA 3249	9h 30m	99%	82%
JetBlue Details →	SJU 05:01 → JFK 08:54B6 2904	2h 06m New York	JFK 11:00 → ATL 13:34B6 919	8h 33m	99%	77%
United Details →	SJU 07:00 → IAH 10:53UA 1644	1h 02m Houston	IAH 11:55 → ATL 15:16UA 4079 · flown by Mesa	8h 16m	96%	75%
Frontier Details →	SJU 03:10 → MCO 06:10F9 1823	1h 35m Orlando	MCO 07:45 → ATL 09:41F9 1563	6h 31m	93%	75%
American Details →	SJU 00:59 → ORD 05:04AA 2592	3h 08m Chicago	ORD 08:12 → ATL 11:14AA 1363	10h 16m	99%	74%
Tight connection: often missed
American Details →	SJU 05:45 → DFW 10:00AA 1847	58m Dallas-Fort Worth	DFW 10:58 → ATL 14:10AA 1386	8h 25m	71%	47%

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

IAD · 1h 14m · leaves 07:20 2%

IAH · 1h 02m · leaves 07:00 4%

DFW · 1h 00m · leaves 00:58 9%

Afternoon and evening

BOS · 1h 01m · leaves 14:05 19%

CLT · 50m · leaves 15:40 23%

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.


Southwest WN 3721 SJU 05:00 → MCO Delta DL 2204 MCO 10:05 → ATL Connection details →	2h 05m	6h 41m	98%	86%
JetBlue B6 234 SJU 02:20 → MCO Delta DL 1463 MCO 08:05 → ATL Connection details →	2h 46m	7h 24m	97%	86%
Southwest WN 3717 SJU 05:20 → BWI Delta DL 801 BWI 11:52 → ATL Connection details →	2h 22m	8h 21m	98%	85%

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