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 4% of the time at 6 am and 43% of the time at 7 pm.

Nonstops


Southwest	BWI	STL	2h 20m	83%	1.1%	1,268	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 Baltimore). Layovers up to 4 hours. Pick a connection for the details.


United Details →	BWI 06:15 → ORD 07:30UA 709	3h 10m Chicago	ORD 10:40 → STL 12:11UA 1355	6h 56m	100%	89%
American Details →	BWI 05:02 → CLT 06:26AA 1708	1h 10m Charlotte	CLT 07:36 → STL 08:32AA 2733	4h 30m	96%	88%
Southwest Details →	BWI 08:15 → MCI 09:58WN 4215	3h 47m Kansas City	MCI 13:45 → STL 14:50WN 2083	7h 35m	100%	88%
Delta Details →	BWI 08:17 → ATL 10:15DL 2562	3h 54m Atlanta	ATL 14:09 → STL 14:48DL 2700	7h 33m	99%	86%
Delta Details →	BWI 06:08 → DTW 07:40DL 2601	1h 10m Detroit	DTW 08:50 → STL 09:32DL 2868	4h 24m	96%	82%
Southwest Details →	BWI 06:35 → MCO 08:55WN 984	2h 15m Orlando	MCO 11:10 → STL 12:40WN 3316	7h 05m	98%	81%
American Details →	BWI 06:15 → CLT 07:53AA 2670	3h 07m Charlotte	CLT 11:00 → STL 11:59AA 2717	6h 43m	98%	81%
Delta Details →	BWI 07:00 → ATL 08:56DL 2579	2h 56m Atlanta	ATL 11:52 → STL 12:34DL 566	6h 30m	99%	79%
Tight connection: often missed
Delta Details →	BWI 17:32 → DTW 19:14DL 2480	46m Detroit	DTW 20:00 → STL 20:39DL 1541	4h 07m	71%	53%
American Details →	BWI 20:16 → CLT 21:55AA 1637	1h 00m Charlotte	CLT 22:55 → STL 23:57AA 459	4h 41m	63%	45%
United Details →	BWI 17:32 → ORD 18:55UA 590	1h 00m Chicago	ORD 19:55 → STL 21:26UA 2144	4h 54m	57%	35%

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 10m · leaves 05:02 4%

DTW · 1h 10m · leaves 06:08 4%

ORD · 1h 07m · leaves 10:32 7%

Afternoon and evening

ORD · 1h 00m · leaves 17:32 43%

MSP · 51m · leaves 19:10 43%

AUS · 55m · leaves 13:50 57%

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 3931 BWI 08:20 → ATL Delta DL 2700 ATL 14:09 → STL Connection details →	3h 49m	7h 30m	98%	87%
American AA 3889 BWI 06:03 → ORD United UA 1355 ORD 10:40 → STL Connection details →	3h 10m	7h 08m	96%	86%
United UA 2749 BWI 08:16 → ORD American AA 3815 ORD 12:32 → STL Connection details →	3h 02m	6h 39m	100%	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