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 13% of the time at 11 am and 1 time in 4 at 7 pm.

Best connections, any airlines

Ranked by chance you reach New York on time. Total trip = scheduled departure to arrival, layover included (New York 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 25m Chicago	MDW 08:05 → LGA 11:20 +1WN 2038	8h 25m	100%	96%
Delta Details →	ONT 22:00 → ATL 05:18DL 2892	2h 12m Atlanta	ATL 07:30 → LGA 09:42 +1DL 323	8h 42m	100%	86%
United Details →	ONT 05:00 → DEN 08:20UA 2446	1h 29m Denver	DEN 09:49 → LGA 15:46UA 2446	7h 46m	97%	79%
American Details →	ONT 23:59 → DFW 05:00AA 3006	2h 29m Dallas-Fort Worth	DFW 07:29 → LGA 12:00 +1AA 1609	9h 03m	96%	78%
American Details →	ONT 22:10 → CLT 05:48AA 2237	1h 17m Charlotte	CLT 07:05 → LGA 09:01 +1AA 2043	7h 51m	89%	75%
Southwest + Deltatwo ticketsDetails →	ONT 05:50 → DEN 09:05WN 3144	2h 00m Denver	DEN 11:05 → LGA 16:50DL 751	8h 02m	98%	75%
Southwest + Unitedtwo ticketsDetails →	ONT 08:05 → DEN 11:15WN 3145	2h 44m Denver	DEN 13:59 → LGA 19:53UA 1579	8h 48m	96%	67%
United Details →	ONT 05:45 → IAH 11:04UA 1936	3h 16m Houston	IAH 14:20 → LGA 19:04UA 2249	10h 19m	99%	67%
Tight connection: often missed
American Details →	ONT 23:59 → DFW 05:00AA 3006	1h 00m Dallas-Fort Worth	DFW 06:00 → LGA 10:30 +1AA 3096	7h 31m	70%	58%
Southwest Details →	ONT 12:50 → DEN 16:05WN 3146	1h 10m Denver	DEN 17:15 → LGA 23:00WN 4480	7h 10m	56%	14%

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

CLT · 1h 17m · leaves 22:10 11%

IAH · 56m · leaves 05:45 13%

DFW · 49m · leaves 05:34 20%

Afternoon and evening

DFW · 1h 12m · leaves 10:25 9%

ATL · 49m · leaves 11:50 24%

DEN · 1h 10m · leaves 12:50 44%

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