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

Nonstops


Southwest	BWI	DAL	3h 20m	77%	1.6%	1,803	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


Delta Details →	BWI 05:40 → ATL 07:31DL 2950	2h 44m Atlanta	ATL 10:15 → DAL 11:24DL 1115	6h 44m	99%	87%
Southwest Details →	BWI 06:50 → HOU 09:00WN 3246	2h 30m Houston	HOU 11:30 → DAL 12:40WN 22	6h 50m	100%	84%
Southwest Details →	BWI 06:25 → LAS 08:25WN 973	2h 13m Las Vegas	LAS 10:38 → DAL 15:25WN 2218	10h 01m	100%	82%
Delta Details →	BWI 08:17 → ATL 10:15DL 2562	3h 44m Atlanta	ATL 13:59 → DAL 15:03DL 512	7h 55m	99%	82%
Southwest Details →	BWI 09:45 → BNA 10:35WN 487	1h 45m Nashville	BNA 12:20 → DAL 14:15WN 5046	5h 30m	94%	79%
Southwest Details →	BWI 10:00 → HOU 12:15WN 956	2h 45m Houston	HOU 15:00 → DAL 16:10WN 36	7h 10m	100%	76%
Delta Details →	BWI 11:52 → ATL 13:41DL 801	2h 57m Atlanta	ATL 16:38 → DAL 17:55DL 2780	7h 03m	99%	75%
Delta Details →	BWI 17:00 → ATL 19:08DL 2799	2h 07m Atlanta	ATL 21:15 → DAL 22:34DL 1104	6h 34m	94%	74%
Tight connection: often missed
Southwest Details →	BWI 17:40 → MCO 20:15WN 172	1h 35m Orlando	MCO 21:50 → DAL 23:30WN 1973	6h 50m	68%	36%
Southwest Details →	BWI 16:55 → DEN 18:55WN 939	1h 35m Denver	DEN 20:30 → DAL 23:30WN 1523	7h 35m	69%	26%
Southwest Details →	BWI 15:00 → SAN 17:20WN 1088	50m San Diego	SAN 18:10 → DAL 23:15WN 3492	9h 10m	30%	10%

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

ATL · 1h 19m · leaves 07:00 4%

LAX · 1h 10m · leaves 07:10 24%

DEN · 50m · leaves 07:25 28%

Afternoon and evening

MDW · 53m · leaves 16:28 37%

MCO · 50m · leaves 12:48 56%

SAN · 50m · leaves 15:00 70%

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 1115 ATL 10:15 → DAL Connection details →	2h 00m	6h 04m	100%	90%
Southwest WN 3931 BWI 08:20 → ATL Delta DL 512 ATL 13:59 → DAL Connection details →	3h 39m	7h 52m	98%	83%
Southwest WN 862 BWI 11:55 → ATL Delta DL 2780 ATL 16:38 → DAL Connection details →	2h 53m	7h 00m	97%	72%

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