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 BWI → HOU flights land within a few points of 77% on time whatever the hour.

Nonstops


Southwest	BWI	HOU	3h 25m	77%	1.4%	1,468	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


Southwest Details →	BWI 08:15 → CHS 10:02WN 898	1h 58m Charleston	CHS 12:00 → HOU 13:30WN 356	6h 15m	100%	85%
Southwest Details →	BWI 08:15 → MCI 09:58WN 4215	1h 57m Kansas City	MCI 11:55 → HOU 14:05WN 2555	6h 50m	100%	84%
Southwest Details →	BWI 06:10 → MDW 07:10WN 995	3h 00m Chicago	MDW 10:10 → HOU 12:50WN 2783	7h 40m	98%	84%
Delta Details →	BWI 07:00 → ATL 08:56DL 2579	2h 09m Atlanta	ATL 11:05 → HOU 12:11DL 1195	6h 12m	99%	81%
Southwest Details →	BWI 06:05 → DEN 07:50WN 4436	2h 25m Denver	DEN 10:15 → HOU 13:55WN 1543	8h 50m	100%	81%
Southwest Details →	BWI 06:20 → ATL 08:15WN 4689	1h 15m Atlanta	ATL 09:30 → HOU 10:35WN 4914	5h 15m	100%	79%
Delta Details →	BWI 10:33 → ATL 12:24DL 1592	2h 47m Atlanta	ATL 15:11 → HOU 16:23DL 2381	6h 52m	98%	76%
Southwest Details →	BWI 15:20 → IND 17:05WN 961	3h 15m Indianapolis	IND 20:20 → HOU 21:50WN 2124	7h 30m	100%	76%
Tight connection: often missed
Southwest Details →	BWI 18:40 → MCO 21:10WN 3777	1h 10m Orlando	MCO 22:20 → HOU 23:45WN 2645	6h 08m	64%	31%
Southwest Details →	BWI 17:05 → TPA 19:45WN 1997	55m Tampa	TPA 20:40 → HOU 21:55WN 4025	5h 50m	58%	28%
American Details →	BWI 19:17 → DFW 21:42AA 1626	56m Dallas-Fort Worth	DFW 22:38 → HOU 23:56AA 5465 · flown by PSA	5h 39m	48%	21%

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

MSY · 1h 15m · leaves 09:25 7%

DAL · 1h 05m · leaves 08:15 10%

ATL · 49m · leaves 05:40 13%

Afternoon and evening

MCO · 1h 10m · leaves 18:40 36%

DFW · 56m · leaves 19:17 52%

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 4689 BWI 06:20 → ATL Delta DL 1195 ATL 11:05 → HOU Connection details →	2h 50m	6h 52m	100%	84%
United UA 2412 BWI 08:30 → DEN Southwest WN 1544 DEN 12:30 → HOU Connection details →	2h 05m	8h 35m	94%	74%
Delta DL 2950 BWI 05:40 → ATL Southwest WN 4914 ATL 09:30 → HOU Connection details →	1h 59m	5h 55m	95%	73%

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