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

No nonstop, and no clear pattern: the best connection reaches Newark on time 9 times in 10.

Best connections, any airlines

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


Alaska Details →	ONT 17:32 → PDX 19:49AS 2456 · flown by Horizon	1h 42m Portland	PDX 21:31 → EWR 05:59 +1AS 1631	9h 27m	98%	91%
Delta + Unitedtwo ticketsDetails →	ONT 22:00 → ATL 05:18DL 2892	1h 57m Atlanta	ATL 07:15 → EWR 09:33 +1UA 2053	8h 33m	100%	88%
Southwest + Unitedtwo ticketsDetails →	ONT 05:30 → LAS 06:35WN 3150	3h 21m Las Vegas	LAS 09:56 → EWR 18:00UA 1784	9h 30m	100%	87%
American Details →	ONT 22:10 → CLT 05:48AA 2237	2h 12m Charlotte	CLT 08:00 → EWR 09:59 +1AA 1782	8h 49m	98%	83%
Delta Details →	ONT 17:21 → SLC 20:17DL 4443 · flown by SkyWest	3h 21m Salt Lake City	SLC 23:38 → EWR 06:00 +1DL 2038	9h 34m	96%	83%
Alaska Details →	ONT 17:26 → SEA 20:06AS 575	2h 34m Seattle	SEA 22:40 → EWR 06:59 +1AS 314	10h 33m	98%	82%
United Details →	ONT 05:00 → DEN 08:20UA 2446	1h 42m Denver	DEN 10:02 → EWR 16:00UA 1423	8h 00m	98%	82%
Southwest + Americantwo ticketsDetails →	ONT 17:15 → PHX 18:35WN 3159	3h 39m Phoenix	PHX 22:14 → EWR 06:00 +1AA 2156	9h 45m	97%	80%
Tight connection: often missed
United Details →	ONT 13:50 → SFO 15:15UA 1375	1h 05m San Francisco	SFO 16:20 → EWR 01:10 +1UA 2626	8h 20m	61%	42%
United Details →	ONT 18:39 → SFO 20:07UA 5624 · flown by SkyWest	1h 08m San Francisco	SFO 21:15 → EWR 05:51 +1UA 698	8h 12m	21%	17%

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

DFW · 1h 06m · leaves 05:34 10%

IAH · 56m · leaves 05:45 13%

SFO · 50m · leaves 06:00 18%

Afternoon and evening

DEN · 1h 12m · leaves 13:18 12%

ATL · 59m · leaves 11:50 16%

SFO · 1h 08m · leaves 18:39 79%

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