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 75-minute layover misses 1% of the time at 7 am and 31% of the time at 7 pm.

Nonstops


American	BOS	MIA	3h 40m	83%	1.7%	2,273	Flying now
Delta	BOS	MIA	3h 44m	73%	2.6%	891	Flying now
Spirit	BOS	MIA	3h 32m	56%	5.9%	185	Not flying now
JetBlue	BOS	MIA	3h 29m	80%few flights	0.0%	35	Not flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


American Details →	BOS 06:05 → CLT 08:30AA 418	2h 31m Charlotte	CLT 11:01 → MIA 13:11AA 969	7h 05m	98%	85%
American Details →	BOS 06:00 → DCA 07:44AA 2159	2h 11m Washington	DCA 09:55 → MIA 12:38AA 1173	6h 38m	100%	85%
American Details →	BOS 07:00 → STL 09:09AA 3814 · flown by Envoy	1h 51m St Louis	STL 11:00 → MIA 14:46AA 3954 · flown by Envoy	7h 46m	94%	85%
United Details →	BOS 05:45 → IAD 07:23UA 1734	1h 22m Dulles	IAD 08:45 → MIA 11:35UA 1073	5h 50m	99%	84%
United Details →	BOS 05:47 → IAH 08:50UA 1409	3h 10m Houston	IAH 12:00 → MIA 15:47UA 410	10h 00m	98%	83%
Delta Details →	BOS 05:30 → DTW 07:39DL 1019	1h 43m Detroit	DTW 09:22 → MIA 12:30DL 1468	7h 00m	97%	81%
Delta Details →	BOS 05:30 → ATL 08:15DL 2242	2h 45m Atlanta	ATL 11:00 → MIA 13:04DL 1332	7h 34m	100%	80%
American Details →	BOS 05:10 → ORD 07:04AA 3324	3h 00m Chicago	ORD 10:04 → MIA 14:16AA 1474	9h 07m	99%	80%
Tight connection: often missed
Delta Details →	BOS 17:05 → JFK 18:43DL 5814 · flown by Republic	1h 09m New York	JFK 19:52 → MIA 23:33DL 1428	6h 28m	69%	42%
American Details →	BOS 17:46 → JFK 19:29AA 4390 · flown by Republic	1h 31m New York	JFK 21:00 → MIA 00:21 +1AA 2026	6h 35m	72%	33%
American Details →	BOS 16:47 → CLT 19:29AA 1573	46m Charlotte	CLT 20:15 → MIA 22:21AA 2321	5h 34m	58%	28%

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

BWI · 1h 15m · leaves 08:55 4%

CLT · 55m · leaves 06:05 7%

DFW · 1h 10m · leaves 06:00 7%

Afternoon and evening

CLT · 46m · leaves 16:47 42%

DCA · 56m · leaves 17:23 53%

EWR · 49m · leaves 17:44 71%

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 752 BOS 05:50 → STL American AA 3954 STL 11:00 → MIA Connection details →	3h 15m	8h 56m	100%	90%
Delta DL 2222 BOS 13:10 → DTW American AA 3358 DTW 18:57 → MIA Connection details →	3h 37m	9h 00m	98%	88%
Delta DL 2066 BOS 06:20 → RDU American AA 2405 RDU 11:10 → MIA Connection details →	2h 42m	6h 59m	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