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 1 time in 10 at 10 am and 29% of the time at 9 pm.

Nonstops


Southwest	BNA	SAN	4h 30m	75%	0.8%	1,065	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

Ranked by chance you reach San Diego on time. Total trip = scheduled departure to arrival, layover included (San Diego is 2 h behind Nashville). Layovers up to 4 hours. Pick a connection for the details.


Southwest Details →	BNA 05:15 → DEN 07:00WN 800	1h 15m Denver	DEN 08:15 → SAN 09:40WN 1699	6h 25m	100%	86%
United Details →	BNA 10:26 → DEN 12:23UA 502	1h 07m Denver	DEN 13:30 → SAN 14:55UA 1302	6h 29m	93%	80%
United Details →	BNA 07:00 → DEN 08:55UA 1716	2h 20m Denver	DEN 11:15 → SAN 12:41UA 1940	7h 41m	98%	80%
Delta Details →	BNA 08:33 → ATL 10:40DL 2250	1h 13m Atlanta	ATL 11:53 → SAN 13:21DL 540	6h 48m	98%	78%
Delta Details →	BNA 06:15 → ATL 08:31DL 3001	1h 37m Atlanta	ATL 10:08 → SAN 11:37DL 712	7h 22m	98%	77%
United Details →	BNA 06:30 → IAH 08:42UA 396	48m Houston	IAH 09:30 → SAN 10:51UA 2491	6h 21m	89%	76%
Delta Details →	BNA 07:35 → SLC 10:13DL 1068	1h 02m Salt Lake City	SLC 11:15 → SAN 12:17DL 1296	6h 42m	90%	74%
Southwest Details →	BNA 05:10 → DAL 07:00WN 485	50m Dallas	DAL 07:50 → SAN 08:50WN 192	5h 40m	85%	72%
Tight connection: often missed
American Details →	BNA 07:02 → ORD 09:10AA 4964 · flown by SkyWest	54m Chicago	ORD 10:04 → SAN 12:27AA 2482	7h 24m	68%	46%
American Details →	BNA 15:57 → ORD 18:05AA 6200 · flown by SkyWest	54m Chicago	ORD 18:59 → SAN 21:22AA 1924	7h 24m	53%	29%
American Details →	BNA 17:41 → ORD 19:55AA 1570	1h 15m Chicago	ORD 21:10 → SAN 23:26AA 2457	7h 45m	53%	22%

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

DEN · 1h 15m · leaves 05:15 0%

ATL · 1h 13m · leaves 08:33 2%

SLC · 1h 02m · leaves 07:35 10%

Afternoon and evening

ORD · 54m · leaves 15:57 47%

PHX · 1h 05m · leaves 19:15 64%

DEN · 1h 00m · leaves 18:40 68%

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 500 BNA 11:40 → DEN United UA 1281 DEN 15:55 → SAN Connection details →	2h 30m	7h 40m	92%	78%
United UA 1716 BNA 07:00 → DEN Southwest WN 1700 DEN 10:32 → SAN Connection details →	1h 37m	6h 57m	83%	65%
Delta DL 355 BNA 14:59 → LAX United UA 5415 LAX 18:50 → SAN Connection details →	1h 38m	6h 52m	78%	64%

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