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

No clear winner: airlines and hours on this route all land within a few points of 83% on time.

Nonstops


American	ONT	PHX	1h 21m	84%	0.9%	1,417	Flying now
Southwest	ONT	PHX	1h 15m	81%	0.4%	1,610	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


Southwest Details →	ONT 06:12 → OAK 07:38WN 3042	2h 37m Oakland	OAK 10:15 → PHX 12:10WN 4766	5h 58m	100%	94%
Alaska Details →	ONT 07:00 → PDX 09:15AS 345	1h 15m Portland	PDX 10:30 → PHX 13:20AS 716	6h 20m	100%	90%
Southwest Details →	ONT 05:30 → LAS 06:35WN 3150	1h 20m Las Vegas	LAS 07:55 → PHX 09:15WN 209	3h 45m	98%	89%
Delta Details →	ONT 13:00 → SLC 15:47DL 3172	1h 38m Salt Lake City	SLC 17:25 → PHX 18:07DL 1451	5h 07m	96%	86%
Delta Details →	ONT 17:21 → SLC 20:17DL 4443 · flown by SkyWest	2h 28m Salt Lake City	SLC 22:45 → PHX 23:31DL 1496	6h 10m	96%	85%
Delta Details →	ONT 06:00 → SLC 08:50DL 2708	2h 40m Salt Lake City	SLC 11:30 → PHX 12:12DL 1431	6h 14m	98%	84%
Southwest Details →	ONT 08:35 → LAS 09:40WN 2333	2h 50m Las Vegas	LAS 12:30 → PHX 13:50WN 2311	5h 15m	100%	84%
Delta Details →	ONT 09:40 → SLC 12:28DL 1302	2h 52m Salt Lake City	SLC 15:20 → PHX 16:04DL 1738	6h 26m	100%	84%
Tight connection: often missed
United Details →	ONT 13:50 → SFO 15:15UA 1375	1h 10m San Francisco	SFO 16:25 → PHX 18:39UA 574	4h 49m	65%	48%
American Details →	ONT 14:15 → DFW 19:30AA 2239	1h 00m Dallas-Fort Worth	DFW 20:30 → PHX 21:02AA 1133	6h 47m	57%	30%
Southwest Details →	ONT 14:30 → DEN 17:40WN 3147	1h 15m Denver	DEN 18:55 → PHX 19:50WN 1683	5h 25m	56%	16%

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

LAS · 1h 20m · leaves 05:30 2%

DEN · 1h 20m · leaves 08:05 4%

SEA · 1h 15m · leaves 06:02 5%

Afternoon and evening

DFW · 1h 00m · leaves 14:15 43%

SFO · 1h 14m · leaves 18:39 68%

LAS · 50m · leaves 16:40 84%

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 3150 ONT 05:30 → LAS American AA 2004 LAS 09:56 → PHX Connection details →	3h 21m	5h 38m	100%	92%
Southwest WN 3144 ONT 05:50 → DEN United UA 1686 DEN 11:25 → PHX Connection details →	2h 20m	6h 35m	100%	87%
Southwest WN 3165 ONT 06:00 → SMF American AA 4099 SMF 09:52 → PHX Connection details →	2h 27m	5h 50m	98%	86%

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