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 9 am and almost half the time at 8 pm.

Nonstops


Southwest	STL	BWI	2h 00m	81%	1.3%	1,279	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


Southwest Details →	STL 05:40 → MDW 06:45WN 1008	2h 10m Chicago	MDW 08:55 → BWI 11:45WN 1355	5h 05m	98%	87%
Southwest Details →	STL 05:05 → TPA 08:25WN 3985	2h 15m Tampa	TPA 10:40 → BWI 13:00WN 1016	6h 55m	98%	87%
Delta Details →	STL 06:00 → ATL 08:38DL 1524	2h 32m Atlanta	ATL 11:10 → BWI 13:03DL 2711	6h 03m	99%	85%
Southwest Details →	STL 08:15 → MKE 09:25WN 4775	3h 00m Milwaukee	MKE 12:25 → BWI 15:20WN 2937	6h 05m	100%	85%
Southwest Details →	STL 05:05 → MCO 08:25WN 4358	2h 30m Orlando	MCO 10:55 → BWI 13:10WN 193	7h 05m	100%	85%
United Details →	STL 06:00 → ORD 07:30UA 2805	3h 21m Chicago	ORD 10:51 → BWI 13:57UA 2653	6h 57m	97%	81%
United Details →	STL 08:35 → IAH 10:50UA 4579 · flown by GoJet	1h 26m Houston	IAH 12:16 → BWI 16:30UA 1720	6h 55m	97%	78%
Delta Details →	STL 06:30 → DTW 09:04DL 1626	1h 06m Detroit	DTW 10:10 → BWI 11:47DL 1546	4h 17m	93%	78%
Tight connection: often missed
American Details →	STL 13:27 → ORD 14:59AA 6352 · flown by SkyWest	1h 19m Chicago	ORD 16:18 → BWI 19:28AA 4717 · flown by Republic	5h 04m	74%	37%
Frontier Details →	STL 17:06 → ATL 20:07F9 4474	53m Atlanta	ATL 21:00 → BWI 23:00F9 4712	4h 54m	53%	23%
Southwest Details →	STL 16:05 → CLT 18:55WN 4937	55m Charlotte	CLT 19:50 → BWI 21:25WN 478	4h 20m	46%	19%

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 06m · leaves 06:30 7%

MCO · 50m · leaves 05:05 11%

ORD · 1h 16m · leaves 08:00 13%

Afternoon and evening

IAH · 1h 16m · leaves 14:57 26%

CLT · 55m · leaves 16:05 54%

ATL · 50m · leaves 16:25 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.


Delta DL 1524 STL 06:00 → ATL Southwest WN 186 ATL 10:15 → BWI Connection details →	1h 37m	5h 10m	92%	79%
Southwest WN 4177 STL 09:55 → DTW Delta DL 2480 DTW 15:09 → BWI Connection details →	2h 44m	5h 50m	97%	77%
American AA 1926 STL 06:55 → ORD United UA 2653 ORD 10:51 → BWI Connection details →	2h 28m	6h 02m	91%	74%

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