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 7% of the time at 7 am and 31% of the time at 4 pm.

Nonstops


American	STL	ORD	1h 29m	74%	3.7%	2,114	Flying now
United	STL	ORD	1h 30m	72%	2.8%	3,077	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

Ranked by chance you reach Chicago on time. Total trip = scheduled departure to arrival, layover included. Layovers up to 4 hours. Pick a connection for the details.


American Details →	STL 05:10 → CLT 08:03AA 858	2h 58m Charlotte	CLT 11:01 → ORD 12:19AA 2908	7h 09m	99%	87%
United Details →	STL 05:10 → DEN 06:32UA 362	1h 08m Denver	DEN 07:40 → ORD 11:23UA 1928	6h 13m	93%	84%
Delta Details →	STL 06:30 → DTW 09:04DL 1626	1h 11m Detroit	DTW 10:15 → ORD 10:50DL 3673 · flown by SkyWest	4h 20m	94%	82%
United Details →	STL 06:14 → IAH 08:31UA 6283 · flown by Mesa	1h 04m Houston	IAH 09:35 → ORD 12:29UA 2124	6h 15m	88%	75%
American Details →	STL 06:43 → DCA 09:46AA 309	1h 49m Washington	DCA 11:35 → ORD 12:53AA 489	6h 10m	100%	74%
American Details →	STL 06:14 → PHL 09:34AA 1308	1h 01m Philadelphia	PHL 10:35 → ORD 12:09AA 1041	5h 55m	90%	74%
Delta Details →	STL 07:08 → ATL 09:45DL 1536	3h 17m Atlanta	ATL 13:02 → ORD 14:16DL 1477	7h 08m	99%	73%
American Details →	STL 05:30 → DFW 07:29AA 2261	1h 01m Dallas-Fort Worth	DFW 08:30 → ORD 11:10AA 1059	5h 40m	93%	72%
Tight connection: often missed
Delta Details →	STL 12:35 → LGA 16:09DL 4922 · flown by Endeavor	51m New York	LGA 17:00 → ORD 19:10DL 2503	6h 35m	69%	38%
United Details →	STL 16:48 → DEN 18:23UA 1483	47m Denver	DEN 19:10 → ORD 22:49UA 2258	6h 01m	46%	32%
American Details →	STL 17:13 → DFW 19:15AA 2712	1h 45m Dallas-Fort Worth	DFW 21:00 → ORD 23:39AA 2346	6h 26m	53%	29%

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

DTW · 1h 11m · leaves 06:30 6%

DEN · 1h 08m · leaves 05:10 7%

DFW · 1h 01m · leaves 05:30 7%

Afternoon and evening

LGA · 51m · leaves 12:35 31%

DEN · 47m · leaves 16:48 54%

DFW · 52m · leaves 19:22 68%

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 4358 STL 05:05 → MCO United UA 2466 MCO 10:52 → ORD Connection details →	2h 27m	7h 57m	100%	92%
Delta DL 1597 STL 06:21 → MSP American AA 4162 MSP 10:31 → ORD Connection details →	2h 34m	5h 55m	97%	85%
American AA 2261 STL 05:30 → DFW United UA 1114 DFW 09:45 → ORD Connection details →	2h 16m	6h 56m	96%	85%

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