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

No clear winner: American’s ONT → CLT flights land within a few points of 88% on time whatever the hour.

Nonstops (seasonal or thin)


American	ONT	CLT	4h 30m	88%	1.2%	327	Flying now

Best connections, any airlines

Most reliable Quickest (80%+ on time)

Ranked by chance you reach Charlotte on time. Total trip = scheduled departure to arrival, layover included (Charlotte is 3 h ahead of Ontario). Layovers up to 4 hours. Pick a connection for the details.


Southwest Details →	ONT 23:55 → MDW 05:40WN 3153	2h 10m Chicago	MDW 07:50 → CLT 10:55 +1WN 2749	8h 00m	100%	96%
Delta Details →	ONT 22:00 → ATL 05:18DL 2892	2h 20m Atlanta	ATL 07:38 → CLT 08:53 +1DL 3144	7h 49m	100%	90%
Southwest + Americantwo ticketsDetails →	ONT 05:15 → PHX 06:30WN 864	3h 36m Phoenix	PHX 10:06 → CLT 17:30AA 1678	9h 15m	98%	88%
American Details →	ONT 23:59 → DFW 05:00AA 3006	3h 34m Dallas-Fort Worth	DFW 08:34 → CLT 12:14 +1AA 1690	9h 15m	100%	87%
United Details →	ONT 05:00 → DEN 08:20UA 2446	1h 30m Denver	DEN 09:50 → CLT 15:12UA 1633	7h 12m	97%	87%
Southwest + Americantwo ticketsDetails →	ONT 05:30 → LAS 06:35WN 3150	3h 01m Las Vegas	LAS 09:36 → CLT 17:17AA 2030	8h 47m	100%	85%
Delta Details →	ONT 06:00 → SLC 08:50DL 2708	2h 05m Salt Lake City	SLC 10:55 → CLT 16:52DL 2070	7h 54m	98%	84%
Southwest Details →	ONT 21:40 → BWI 05:30WN 3143	2h 45m Baltimore	BWI 08:15 → CLT 09:55 +1WN 148	9h 15m	100%	81%
Tight connection: often missed
American Details →	ONT 14:15 → DFW 19:30AA 2239	1h 44m Dallas-Fort Worth	DFW 21:14 → CLT 00:53 +1AA 2409	7h 38m	71%	20%
Southwest Details →	ONT 09:45 → BNA 15:35WN 3142	1h 05m Nashville	BNA 16:40 → CLT 19:10WN 478	6h 25m	63%	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

IAH · 1h 06m · leaves 05:45 6%

DFW · 1h 14m · leaves 05:34 8%

PHX · 1h 00m · leaves 06:11 8%

Afternoon and evening

DEN · 1h 07m · leaves 13:18 13%

DFW · 1h 04m · leaves 12:35 25%

BNA · 1h 05m · leaves 09:45 37%

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.

The table above includes two-ticket connections (marked “two tickets”), held to the 90-minute minimum. One ticket only →

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