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 STT → BOS flights land within a few points of 4 in 5 on time whatever the hour.

Nonstops (none in the current schedule)


Delta	STT	BOS	4h 21m	81%	4.7%	127	Not flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


Delta Details →	STT 15:29 → ATL 19:29DL 1889	3h 21m Atlanta	ATL 22:50 → BOS 01:31 +1DL 865	10h 02m	100%	78%
United Details →	STT 16:45 → IAD 20:58UA 1445	1h 12m Dulles	IAD 22:10 → BOS 23:59UA 755	7h 14m	88%	69%
Delta Details →	STT 13:20 → ATL 17:18DL 1823	3h 12m Atlanta	ATL 20:30 → BOS 23:14DL 300	9h 54m	97%	66%
American Details →	STT 16:46 → CLT 20:57AA 1965	1h 29m Charlotte	CLT 22:26 → BOS 00:37 +1AA 1843	7h 51m	89%	62%
American Details →	STT 13:49 → MIA 16:50AA 2744	1h 30m Miami	MIA 18:20 → BOS 21:45AA 1074	7h 56m	97%	59%
American Details →	STT 11:43 → CLT 15:49AA 2431	2h 45m Charlotte	CLT 18:34 → BOS 20:59AA 2595	9h 16m	100%	58%
American Details →	STT 16:50 → MIA 19:54AA 2738	1h 51m Miami	MIA 21:45 → BOS 00:59 +1AA 1054	8h 09m	95%	55%
JetBlue Details →	STT 16:07 → SJU 16:49B6 435	3h 46m San Juan	SJU 20:35 → BOS 00:46 +1B6 462	8h 34m	98%	54%
Tight connection: often missed
JetBlue Details →	STT 14:49 → SJU 15:30B6 808	50m San Juan	SJU 16:20 → BOS 20:27B6 808	5h 38m	70%	43%

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.

Afternoon and evening

ATL · 57m · leaves 13:20 20%

IAH · 50m · leaves 13:22 22%

SJU · 50m · leaves 14:49 30%

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 2744 STT 13:49 → MIA Delta DL 776 MIA 19:59 → BOS Connection details →	3h 09m	9h 46m	97%	64%
American AA 2431 STT 11:43 → CLT Delta DL 5837 CLT 17:35 → BOS Connection details →	1h 46m	8h 28m	93%	57%
Southwest WN 3995 STT 14:35 → MCO JetBlue B6 1952 MCO 20:55 → BOS Connection details →	3h 15m	9h 29m	98%	56%

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