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 1 time in 10 at 10 am and 44% of the time at 7 pm.

Best connections, one ticket

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


United Details →	LGA 14:00 → IAH 17:01UA 2674	3h 30m Houston	IAH 20:31 → ONT 21:55UA 1563	10h 55m	97%	76%
Delta Details →	LGA 06:00 → ATL 08:15DL 550	1h 00m Atlanta	ATL 09:15 → ONT 10:40DL 665	7h 40m	91%	72%
United Details →	LGA 07:40 → DEN 09:55UA 2154	1h 30m Denver	DEN 11:25 → ONT 12:47UA 430	8h 07m	83%	69%
Delta Details →	LGA 13:59 → ATL 16:30DL 988	3h 55m Atlanta	ATL 20:25 → ONT 21:50DL 779	10h 51m	99%	68%
American Details →	LGA 06:30 → DFW 09:30AA 1597	1h 10m Dallas-Fort Worth	DFW 10:40 → ONT 11:45AA 2242	8h 15m	91%	66%
Southwest Details →	LGA 06:55 → DEN 09:05WN 2454	1h 50m Denver	DEN 10:55 → ONT 12:10WN 4080	8h 15m	95%	60%
United Details →	LGA 15:20 → DEN 17:56UA 1729	1h 24m Denver	DEN 19:20 → ONT 20:42UA 2028	8h 22m	80%	58%
Southwest Details →	LGA 09:35 → DAL 12:15WN 2451	2h 10m Dallas	DAL 14:25 → ONT 15:25WN 1375	8h 50m	92%	56%
Tight connection: often missed
American Details →	LGA 17:01 → DFW 20:10AA 3103	1h 17m Dallas-Fort Worth	DFW 21:27 → ONT 22:32AA 711	8h 31m	65%	30%
Southwest Details →	LGA 16:50 → DEN 19:30WN 2456	1h 45m Denver	DEN 21:15 → ONT 22:35WN 1663	8h 45m	71%	23%
American Details →	LGA 18:47 → DFW 21:50AA 1571	1h 05m Dallas-Fort Worth	DFW 22:55 → ONT 23:59 +1AA 1534	8h 15m	59%	20%

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 10m · leaves 06:30 9%

ATL · 1h 00m · leaves 06:00 9%

Afternoon and evening

DFW · 1h 05m · leaves 18:47 41%

ORD · 1h 06m · leaves 17:25 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.


Southwest WN 2454 LGA 06:55 → DEN United UA 430 DEN 11:25 → ONT Connection details →	2h 20m	8h 52m	95%	82%
Delta DL 856 LGA 09:30 → DFW Frontier F9 4689 DFW 15:35 → ONT Connection details →	3h 18m	10h 18m	98%	74%
Delta DL 2930 LGA 13:50 → IAH United UA 1563 IAH 20:31 → ONT Connection details →	3h 46m	11h 05m	96%	74%

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