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 8% of the time at 8 am and 45% of the time at 9 pm.

Nonstops


Delta	BNA	BOS	2h 40m	76%	2.2%	1,036	Flying now
JetBlue	BNA	BOS	2h 33m	72%	2.6%	874	Flying now
Southwest	BNA	BOS	2h 30m	61%	1.2%	1,000	Flying now
American	BNA	BOS	–	100%few flights	0.0%	2	Not flying now
Spirit	BNA	BOS	2h 35m	67%few flights	8.7%	23	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 (Boston is 1 h ahead of Nashville). Layovers up to 4 hours. Pick a connection for the details.


Southwest Details →	BNA 05:10 → MDW 06:45WN 573	2h 25m Chicago	MDW 09:10 → BOS 12:28WN 1405	6h 18m	100%	92%
American Details →	BNA 05:31 → CLT 08:00AA 1065	3h 18m Charlotte	CLT 11:18 → BOS 13:33AA 1611	7h 02m	100%	88%
Delta Details →	BNA 05:10 → ATL 07:20DL 2637	1h 15m Atlanta	ATL 08:35 → BOS 11:14DL 2432	5h 04m	96%	85%
United Details →	BNA 06:00 → ORD 07:58UA 451	1h 17m Chicago	ORD 09:15 → BOS 12:57UA 1117	5h 57m	95%	82%
Delta Details →	BNA 06:15 → ATL 08:31DL 3001	1h 29m Atlanta	ATL 10:00 → BOS 12:44DL 855	5h 29m	97%	82%
American Details →	BNA 05:38 → MIA 09:03AA 1342	1h 47m Miami	MIA 10:50 → BOS 14:22AA 1565	7h 43m	99%	81%
Southwest Details →	BNA 06:15 → STL 07:35WN 679	2h 30m St Louis	STL 10:05 → BOS 13:40WN 3891	6h 25m	100%	80%
United Details →	BNA 06:30 → IAH 08:42UA 396	1h 08m Houston	IAH 09:50 → BOS 14:48UA 2393	7h 18m	97%	79%
Tight connection: often missed
JetBlue Details →	BNA 18:00 → JFK 21:34B6 1174	55m New York	JFK 22:29 → BOS 23:59B6 1318	4h 59m	69%	39%
American Details →	BNA 15:57 → ORD 18:05AA 6200 · flown by SkyWest	1h 15m Chicago	ORD 19:20 → BOS 22:53AA 3107	6h 00m	66%	34%
American Details →	BNA 12:45 → DFW 14:58AA 1520	1h 06m Dallas-Fort Worth	DFW 16:04 → BOS 20:50AA 1048	7h 05m	75%	31%

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

DTW · 1h 16m · leaves 06:05 3%

MDW · 55m · leaves 05:10 4%

ATL · 1h 15m · leaves 05:10 4%

Afternoon and evening

PHL · 50m · leaves 15:38 41%

IAD · 47m · leaves 18:30 45%

MIA · 50m · leaves 17:27 75%

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 679 BNA 06:15 → STL American AA 3814 STL 09:39 → BOS Connection details →	2h 04m	6h 09m	100%	85%
Southwest WN 4991 BNA 05:40 → DCA Delta DL 5693 DCA 11:47 → BOS Connection details →	3h 22m	6h 50m	100%	81%
Southwest WN 564 BNA 05:10 → MCO Delta DL 1580 MCO 11:20 → BOS Connection details →	3h 20m	8h 14m	100%	81%

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