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 6% of the time at 8 am and 43% of the time at 6 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 Miami). Layovers up to 4 hours. Pick a connection for the details.


United Details →	MIA 07:37 → DEN 10:00UA 2045	1h 25m Denver	DEN 11:25 → ONT 12:47UA 430	8h 10m	96%	85%
Delta Details →	MIA 07:00 → SLC 10:04DL 2021	1h 15m Salt Lake City	SLC 11:19 → ONT 12:10DL 3172	8h 10m	89%	81%
Delta Details →	MIA 06:00 → ATL 08:05DL 1249	1h 10m Atlanta	ATL 09:15 → ONT 10:40DL 665	7h 40m	94%	76%
American Details →	MIA 05:25 → DFW 07:40AA 1226	3h 00m Dallas-Fort Worth	DFW 10:40 → ONT 11:45AA 2242	9h 20m	99%	71%
United Details →	MIA 16:53 → IAH 18:56UA 1216	1h 35m Houston	IAH 20:31 → ONT 21:55UA 1563	8h 02m	88%	69%
American Details →	MIA 07:35 → PHX 09:19AA 1061	1h 26m Phoenix	PHX 10:45 → ONT 12:02AA 2244	7h 27m	92%	66%
American Details →	MIA 14:20 → PHX 16:04AA 896	1h 03m Phoenix	PHX 17:07 → ONT 18:21AA 864	7h 01m	75%	63%
Southwest Details →	MIA 05:10 → HOU 06:45WN 2927	1h 00m Houston	HOU 07:45 → ONT 08:55WN 4391	6h 45m	81%	62%
Tight connection: often missed
American Details →	MIA 17:40 → PHX 19:28AA 2982	1h 02m Phoenix	PHX 20:30 → ONT 21:44AA 1238	7h 04m	66%	47%
American Details →	MIA 17:30 → DFW 19:56AA 3260	1h 31m Dallas-Fort Worth	DFW 21:27 → ONT 22:32AA 711	8h 02m	72%	36%
American Details →	MIA 15:30 → DFW 17:50AA 1199	1h 00m Dallas-Fort Worth	DFW 18:50 → ONT 19:59AA 2236	7h 29m	57%	33%

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

ATL · 1h 10m · leaves 06:00 6%

DFW · 1h 17m · leaves 07:00 6%

SLC · 1h 15m · leaves 07:00 11%

Afternoon and evening

CLT · 58m · leaves 17:23 34%

PHX · 1h 02m · leaves 17:40 34%

DFW · 1h 00m · leaves 15:30 43%

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.


American AA 654 MIA 08:20 → SEA Delta DL 4031 SEA 14:35 → ONT Connection details →	2h 39m	11h 59m	99%	87%
Frontier F9 1279 MIA 06:00 → DEN United UA 430 DEN 11:25 → ONT Connection details →	2h 48m	9h 47m	96%	84%
Delta DL 2355 MIA 06:30 → SEA Frontier F9 2276 SEA 11:53 → ONT Connection details →	1h 53m	11h 09m	99%	83%

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