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 8% of the time at 8 am and 2 times in 5 at 7 pm.

Nonstops


American	MIA	STL	3h 04m	77%	0.8%	727	Flying now
Southwest	MIA	STL	2h 58m	71%	0.5%	440	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

Ranked by chance you reach St Louis on time. Total trip = scheduled departure to arrival, layover included (St Louis is 1 h behind Miami). Layovers up to 4 hours. Pick a connection for the details.


Southwest Details →	MIA 05:25 → MCO 06:30WN 4086	2h 20m Orlando	MCO 08:50 → STL 10:20WN 4501	5h 55m	96%	89%
Delta Details →	MIA 08:17 → ATL 10:20DL 1261	3h 49m Atlanta	ATL 14:09 → STL 14:48DL 2700	7h 33m	99%	88%
American Details →	MIA 06:40 → ORD 09:08AA 581	3h 24m Chicago	ORD 12:32 → STL 13:55AA 3815 · flown by Envoy	8h 15m	99%	83%
American Details →	MIA 06:21 → CLT 08:35AA 2187	2h 25m Charlotte	CLT 11:00 → STL 11:59AA 2717	6h 37m	98%	80%
American Details →	MIA 06:56 → LGA 09:59AA 3205	2h 59m New York	LGA 12:58 → STL 14:50AA 4509 · flown by Republic	8h 54m	98%	79%
Delta Details →	MIA 06:00 → ATL 08:05DL 1249	3h 47m Atlanta	ATL 11:52 → STL 12:34DL 566	7h 30m	99%	79%
Delta Details →	MIA 18:05 → ATL 20:22DL 1386	2h 48m Atlanta	ATL 23:10 → STL 23:53DL 1403	6h 51m	94%	75%
Delta Details →	MIA 13:38 → DTW 16:49DL 1468	3h 11m Detroit	DTW 20:00 → STL 20:39DL 1541	8h 01m	98%	75%
Tight connection: often missed
United Details →	MIA 16:10 → ORD 18:53UA 2106	1h 02m Chicago	ORD 19:55 → STL 21:26UA 2144	6h 16m	61%	37%
American Details →	MIA 12:42 → BOS 16:17AA 1538	54m Boston	BOS 17:11 → STL 19:21AA 4678 · flown by Republic	7h 39m	68%	36%
American Details →	MIA 19:21 → ORD 22:01AA 3304	59m Chicago	ORD 23:00 → STL 00:16 +1AA 1004	5h 55m	47%	25%

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 18m · leaves 07:00 6%

IAH · 1h 18m · leaves 08:48 7%

ATL · 59m · leaves 06:00 8%

Afternoon and evening

PHL · 49m · leaves 18:12 45%

ORD · 59m · leaves 19:21 53%

DFW · 51m · leaves 16:39 54%

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.


Frontier F9 2483 MIA 08:30 → ATL Delta DL 2700 ATL 14:09 → STL Connection details →	3h 19m	7h 20m	99%	86%
American AA 1739 MIA 08:57 → DEN United UA 1639 DEN 13:25 → STL Connection details →	2h 06m	8h 36m	97%	85%
American AA 2090 MIA 07:35 → MCO Southwest WN 3316 MCO 11:10 → STL Connection details →	2h 20m	6h 05m	99%	82%

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