Itineraries flown on 20+ days in the Jun 6 – Jul 31, 2026 schedule · each leg’s record Aug 2025 – Jul 2026

The nonstop is quickest: Southwest BNA → ONT (4h 35m), on time 7 times in 10. Southwest via Phoenix (8h 00m) is more reliable, 88%, but takes 3h 25m longer.

Nonstops (seasonal or thin)


Southwest	BNA	ONT	4h 35m	71%	0.3%	336	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


Southwest Details →	BNA 05:20 → PHX 06:55WN 635	3h 10m Phoenix	PHX 10:05 → ONT 11:20WN 431	8h 00m	100%	88%
United Details →	BNA 07:00 → DEN 08:55UA 1716	2h 30m Denver	DEN 11:25 → ONT 12:47UA 430	7h 47m	98%	86%
Southwest Details →	BNA 07:00 → LAS 08:50WN 3993	2h 40m Las Vegas	LAS 11:30 → ONT 12:32WN 2298	7h 32m	100%	82%
United Details →	BNA 14:54 → SFO 17:42UA 298	3h 18m San Francisco	SFO 21:00 → ONT 22:37UA 552	9h 43m	99%	82%
Delta Details →	BNA 07:35 → SLC 10:13DL 1068	1h 06m Salt Lake City	SLC 11:19 → ONT 12:10DL 3172	6h 35m	91%	82%
Delta Details →	BNA 05:10 → ATL 07:20DL 2637	1h 55m Atlanta	ATL 09:15 → ONT 10:40DL 665	7h 30m	97%	78%
Alaska Details →	BNA 16:43 → PDX 19:33AS 1350	1h 57m Portland	PDX 21:30 → ONT 23:51AS 97	9h 08m	96%	78%
American Details →	BNA 05:01 → DFW 07:12AA 2821	1h 08m Dallas-Fort Worth	DFW 08:20 → ONT 09:29AA 2238	6h 28m	89%	76%
Tight connection: often missed
Delta Details →	BNA 19:34 → SLC 22:10DL 2209	49m Salt Lake City	SLC 22:59 → ONT 23:48DL 1614	6h 14m	60%	53%
United Details →	BNA 16:59 → ORD 19:00UA 1884	1h 18m Chicago	ORD 20:18 → ONT 22:51UA 658	7h 52m	68%	38%
American Details →	BNA 15:31 → DFW 17:44AA 1475	1h 06m Dallas-Fort Worth	DFW 18:50 → ONT 19:59AA 2236	6h 28m	59%	35%

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

SFO · 1h 20m · leaves 06:31 7%

DFW · 1h 20m · leaves 07:04 9%

SLC · 1h 06m · leaves 07:35 9%

Afternoon and evening

SLC · 49m · leaves 19:34 40%

DFW · 1h 07m · leaves 19:32 44%

PHX · 1h 00m · leaves 19:15 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 800 BNA 05:15 → DEN Frontier F9 2907 DEN 08:44 → ONT Connection details →	1h 44m	6h 50m	96%	87%
Alaska AS 623 BNA 09:25 → SEA Delta DL 4031 SEA 14:35 → ONT Connection details →	2h 09m	9h 54m	98%	86%
American AA 3397 BNA 09:58 → DFW Frontier F9 4689 DFW 15:35 → ONT Connection details →	3h 22m	8h 50m	98%	77%

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