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, any airlines

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.


American + Deltatwo ticketsDetails →	MIA 08:20 → SEA 11:56AA 654	2h 39m Seattle	SEA 14:35 → ONT 17:19DL 4031 · flown by SkyWest	11h 59m	99%	87%
United Details →	MIA 07:37 → DEN 10:00UA 2045	1h 25m Denver	DEN 11:25 → ONT 12:47UA 430	8h 10m	96%	85%
Delta + Frontiertwo ticketsDetails →	MIA 06:30 → SEA 10:00DL 2355	1h 53m Seattle	SEA 11:53 → ONT 14:39F9 2276	11h 09m	99%	83%
American + Deltatwo ticketsDetails →	MIA 09:39 → SLC 12:40AA 483	3h 05m Salt Lake City	SLC 15:45 → ONT 16:41DL 4443 · flown by SkyWest	10h 02m	94%	82%
American + Frontiertwo ticketsDetails →	MIA 09:25 → LAS 11:41AA 2010	2h 18m Las Vegas	LAS 13:59 → ONT 15:09F9 1357	8h 44m	99%	81%
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 + Frontiertwo ticketsDetails →	MIA 10:05 → DFW 12:17AA 3081	3h 18m Dallas-Fort Worth	DFW 15:35 → ONT 16:48F9 4689	9h 43m	93%	73%
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.

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