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

No clear winner: Southwest’s PIT → STL flights land within a few points of 83% on time whatever the hour.

Nonstops (seasonal or thin)


Southwest	PIT	STL	1h 50m	83%	0.2%	499	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 Pittsburgh). Layovers up to 4 hours. Pick a connection for the details.


Southwest Details →	PIT 05:10 → MCO 07:30WN 3374	1h 20m Orlando	MCO 08:50 → STL 10:20WN 4501	6h 10m	98%	91%
United Details →	PIT 06:49 → ORD 07:37UA 1803	3h 03m Chicago	ORD 10:40 → STL 12:11UA 1355	6h 22m	97%	85%
American Details →	PIT 05:03 → CLT 06:35AA 349	1h 01m Charlotte	CLT 07:36 → STL 08:32AA 2733	4h 29m	96%	85%
Delta Details →	PIT 10:10 → ATL 12:00DL 1380	2h 09m Atlanta	ATL 14:09 → STL 14:48DL 2700	5h 40m	98%	85%
American Details →	PIT 08:02 → ORD 09:00AA 4625 · flown by Republic	3h 32m Chicago	ORD 12:32 → STL 13:55AA 3815 · flown by Envoy	6h 53m	99%	84%
American Details →	PIT 05:35 → PHL 06:51AA 5487 · flown by PSA	2h 09m Philadelphia	PHL 09:00 → STL 10:36AA 2720	6h 00m	95%	83%
Southwest Details →	PIT 05:50 → BWI 07:00WN 4417	2h 35m Baltimore	BWI 09:35 → STL 10:50WN 1110	6h 00m	100%	83%
United Details →	PIT 07:25 → EWR 08:58UA 3673 · flown by Republic	55m Newark	EWR 09:53 → STL 11:41UA 3630 · flown by Republic	5h 16m	96%	82%
Tight connection: often missed
American Details →	PIT 19:45 → PHL 21:09AA 6092 · flown by Piedmont	50m Philadelphia	PHL 21:59 → STL 23:32AA 1368	4h 47m	68%	44%
American Details →	PIT 15:59 → ORD 16:50AA 555	1h 27m Chicago	ORD 18:17 → STL 19:44AA 4144 · flown by Envoy	4h 45m	70%	38%
American Details →	PIT 20:49 → ORD 21:50AA 2296	1h 10m Chicago	ORD 23:00 → STL 00:16 +1AA 1004	4h 27m	67%	34%

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

MCO · 1h 20m · leaves 05:10 2%

CLT · 1h 01m · leaves 05:03 4%

EWR · 55m · leaves 07:25 4%

Afternoon and evening

ORD · 1h 10m · leaves 20:49 33%

DTW · 56m · leaves 17:46 34%

DCA · 1h 01m · leaves 17:44 50%

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 4427 PIT 06:23 → ORD United UA 1355 ORD 10:40 → STL Connection details →	3h 19m	6h 48m	99%	88%
United UA 3461 PIT 08:36 → ORD American AA 3815 ORD 12:32 → STL Connection details →	3h 02m	6h 19m	98%	82%
American AA 2290 PIT 11:40 → DFW Frontier F9 1524 DFW 16:21 → STL Connection details →	2h 41m	7h 38m	95%	80%

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