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 90-minute layover misses 3% of the time at 10 am and 22% of the time at 4 pm.

Nonstops (seasonal or thin)


Southwest	STL	RDU	1h 50m	82%	0.2%	655	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


Delta Details →	STL 06:00 → ATL 08:38DL 1524	2h 36m Atlanta	ATL 11:14 → RDU 12:44DL 1488	5h 44m	99%	88%
Southwest Details →	STL 06:15 → BWI 09:18WN 3894	2h 17m Baltimore	BWI 11:35 → RDU 12:45WN 4442	5h 30m	98%	86%
Delta Details →	STL 07:08 → ATL 09:45DL 1536	3h 17m Atlanta	ATL 13:02 → RDU 14:29DL 2026	6h 21m	99%	85%
American Details →	STL 05:10 → CLT 08:03AA 858	3h 01m Charlotte	CLT 11:04 → RDU 12:02AA 2363	5h 52m	99%	85%
United Details →	STL 06:00 → ORD 07:30UA 2805	1h 40m Chicago	ORD 09:10 → RDU 12:33UA 5326 · flown by SkyWest	5h 33m	97%	84%
Delta Details →	STL 06:21 → MSP 07:57DL 1597	2h 24m Minneapolis	MSP 10:21 → RDU 13:53DL 2521	6h 30m	98%	83%
Delta Details →	STL 06:30 → DTW 09:04DL 1626	1h 11m Detroit	DTW 10:15 → RDU 11:57DL 2164	4h 30m	94%	80%
American Details →	STL 06:43 → DCA 09:46AA 309	1h 38m Washington	DCA 11:24 → RDU 12:44AA 4700 · flown by Republic	5h 01m	100%	80%
Tight connection: often missed
Delta Details →	STL 17:36 → MSP 19:15DL 3185	1h 10m Minneapolis	MSP 20:25 → RDU 23:59DL 2932	5h 23m	74%	56%
American Details →	STL 13:27 → ORD 14:59AA 6352 · flown by SkyWest	1h 00m Chicago	ORD 15:59 → RDU 19:23AA 4518 · flown by Republic	4h 56m	65%	47%
American Details →	STL 12:39 → CLT 15:34AA 2717	59m Charlotte	CLT 16:33 → RDU 17:36AA 2379	3h 57m	69%	39%

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

CLT · 1h 18m · leaves 05:10 4%

DTW · 1h 11m · leaves 06:30 6%

PHL · 1h 18m · leaves 06:14 8%

Afternoon and evening

CLT · 59m · leaves 12:39 31%

IAH · 52m · leaves 14:57 41%

DFW · 49m · leaves 17:13 73%

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.


United UA 2805 STL 06:00 → ORD American AA 4756 ORD 09:29 → RDU Connection details →	1h 59m	5h 48m	97%	86%
Southwest WN 4177 STL 09:55 → DTW Delta DL 1407 DTW 15:59 → RDU Connection details →	3h 34m	6h 49m	100%	82%
Southwest WN 236 STL 10:00 → ATL Delta DL 1550 ATL 14:45 → RDU Connection details →	2h 10m	5h 14m	96%	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