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 4 in 5 on time.

Nonstops


American	ONT	DFW	3h 02m	81%	2.8%	1,970	Flying now
Frontier	ONT	DFW	3h 12m	75%	1.8%	327	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


United Details →	ONT 05:00 → DEN 08:20UA 2446	1h 20m Denver	DEN 09:40 → DFW 12:48UA 355	5h 48m	97%	90%
American Details →	ONT 06:11 → PHX 07:30AA 1194	3h 01m Phoenix	PHX 10:31 → DFW 15:10AA 3284	6h 59m	97%	82%
Alaska Details →	ONT 07:00 → PDX 09:15AS 345	1h 30m Portland	PDX 10:45 → DFW 16:42AS 392	7h 42m	100%	81%
United Details →	ONT 06:00 → SFO 07:25UA 2363	1h 08m San Francisco	SFO 08:33 → DFW 14:25UA 1062	6h 25m	95%	81%
Delta Details →	ONT 06:00 → SLC 08:50DL 2708	1h 00m Salt Lake City	SLC 09:50 → DFW 13:33DL 2800	5h 33m	95%	80%
American Details →	ONT 19:15 → PHX 20:36AA 2639	4h 00m Phoenix	PHX 00:36 → DFW 05:09 +1AA 1818	7h 54m	100%	79%
Alaska Details →	ONT 17:26 → SEA 20:06AS 575	2h 57m Seattle	SEA 23:03 → DFW 05:02 +1AS 542	9h 36m	98%	76%
Delta Details →	ONT 22:00 → ATL 05:18DL 2892	2h 22m Atlanta	ATL 07:40 → DFW 09:00 +1DL 839	8h 59m	100%	76%

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 20m · leaves 05:00 3%

SLC · 1h 00m · leaves 06:00 5%

SFO · 1h 08m · leaves 06:00 5%

Afternoon and evening

SEA · 1h 11m · leaves 14:05 9%

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 554 PHX 09:30 → DFW Connection details →	3h 00m	6h 53m	98%	85%
Southwest WN 3150 ONT 05:30 → LAS American AA 1584 LAS 10:11 → DFW Connection details →	3h 36m	7h 38m	100%	84%
Southwest WN 3062 ONT 12:45 → PHX Frontier F9 3972 PHX 16:39 → DFW Connection details →	2h 39m	6h 33m	100%	79%

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