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 BHM → DAL flights land within a few points of 4 in 5 on time whatever the hour.

Nonstops (seasonal or thin)


Southwest	BHM	DAL	1h 55m	80%	0.9%	981	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. Layovers up to 4 hours. Pick a connection for the details.


Delta Details →	BHM 05:15 → ATL 07:21DL 1979	2h 54m Atlanta	ATL 10:15 → DAL 11:24DL 1115	6h 09m	100%	89%
Delta Details →	BHM 09:28 → ATL 11:29DL 3100	2h 30m Atlanta	ATL 13:59 → DAL 15:03DL 512	5h 44m	99%	82%
Delta Details →	BHM 10:42 → ATL 12:46DL 3164	3h 52m Atlanta	ATL 16:38 → DAL 17:55DL 2780	7h 13m	100%	74%
Delta Details →	BHM 16:00 → ATL 18:14DL 3163	3h 01m Atlanta	ATL 21:15 → DAL 22:34DL 1104	6h 34m	95%	74%
Southwest Details →	BHM 05:00 → MDW 06:50WN 442	3h 10m Chicago	MDW 10:00 → DAL 12:15WN 1487	7h 15m	100%	73%
Southwest Details →	BHM 12:10 → HOU 13:55WN 4517	3h 35m Houston	HOU 17:30 → DAL 18:40WN 46	6h 30m	100%	72%
Southwest Details →	BHM 05:30 → BNA 06:30WN 430	1h 35m Nashville	BNA 08:05 → DAL 10:00WN 486	4h 30m	95%	68%
Southwest Details →	BHM 06:50 → MCO 09:25WN 440	55m Orlando	MCO 10:20 → DAL 11:55WN 380	5h 05m	92%	55%
Tight connection: often missed
Southwest Details →	BHM 12:10 → HOU 13:55WN 4517	1h 05m Houston	HOU 15:00 → DAL 16:10WN 36	4h 00m	73%	55%
Southwest Details →	BHM 17:15 → DEN 19:05WN 437	1h 25m Denver	DEN 20:30 → DAL 23:30WN 1523	6h 15m	69%	28%
Southwest Details →	BHM 18:40 → BNA 19:40WN 4389	55m Nashville	BNA 20:35 → DAL 22:32WN 3230	3h 50m	19%	6%

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 · 51m · leaves 05:15 4%

MCO · 55m · leaves 06:50 8%

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 1979 BHM 05:15 → ATL Southwest WN 4394 ATL 08:55 → DAL Connection details →	1h 34m	4h 50m	95%	74%
Delta DL 3100 BHM 09:28 → ATL Southwest WN 194 ATL 14:10 → DAL Connection details →	2h 41m	5h 52m	99%	57%
Delta DL 3012 BHM 14:10 → ATL Southwest WN 196 ATL 19:50 → DAL Connection details →	3h 32m	6h 50m	97%	44%

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