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 1 time in 4 at 5 pm.

Nonstops (seasonal or thin)


Southwest	ONT	BNA	3h 45m	79%	0.6%	336	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


Delta Details →	ONT 22:00 → ATL 05:18DL 2892	2h 12m Atlanta	ATL 07:30 → BNA 07:38 +1DL 2250	7h 38m	100%	89%
Southwest Details →	ONT 06:30 → SJC 07:50WN 383	1h 42m San Jose	SJC 09:32 → BNA 15:48WN 3657	7h 17m	100%	84%
Delta Details →	ONT 09:40 → SLC 12:28DL 1302	1h 17m Salt Lake City	SLC 13:45 → BNA 18:13DL 2205	6h 33m	100%	83%
Southwest Details →	ONT 05:50 → DEN 09:05WN 3144	3h 00m Denver	DEN 12:05 → BNA 15:40WN 1486	7h 50m	100%	83%
Delta Details →	ONT 13:00 → SLC 15:47DL 3172	2h 58m Salt Lake City	SLC 18:45 → BNA 23:05DL 2317	8h 07m	100%	82%
Southwest Details →	ONT 05:15 → PHX 06:30WN 864	1h 20m Phoenix	PHX 07:50 → BNA 13:10WN 719	5h 55m	98%	81%
United Details →	ONT 06:00 → SFO 07:25UA 2363	1h 52m San Francisco	SFO 09:17 → BNA 15:53UA 499	7h 53m	97%	81%
Alaska Details →	ONT 07:00 → PDX 09:15AS 345	1h 15m Portland	PDX 10:30 → BNA 17:00AS 1376	8h 00m	100%	80%
Tight connection: often missed
American Details →	ONT 23:59 → DFW 05:00AA 3006	1h 00m Dallas-Fort Worth	DFW 06:00 → BNA 08:01 +1AA 3912 · flown by Envoy	6h 02m	70%	55%
Southwest Details →	ONT 20:50 → SMF 22:12WN 208	53m Sacramento	SMF 23:05 → BNA 05:10 +1WN 3759	6h 20m	65%	51%
Alaska Details →	ONT 14:05 → SEA 16:45AS 567	46m Seattle	SEA 17:31 → BNA 23:59AS 416	7h 54m	57%	46%

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

PHX · 1h 20m · leaves 05:15 2%

LAS · 1h 20m · leaves 08:35 3%

DEN · 57m · leaves 05:50 4%

Afternoon and evening

DEN · 52m · leaves 13:18 24%

SEA · 46m · leaves 14:05 43%

SFO · 55m · leaves 13:50 51%

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 864 ONT 05:15 → PHX American AA 3073 PHX 08:30 → BNA Connection details →	2h 00m	6h 47m	98%	84%
Delta DL 2892 ONT 22:00 → ATL Southwest WN 179 ATL 07:10 → BNA Connection details →	1h 52m	7h 15m	100%	84%
United UA 2446 ONT 05:00 → DEN Southwest WN 1486 DEN 12:05 → BNA Connection details →	3h 45m	8h 40m	99%	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