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

Nonstops


Southwest	BNA	DAL	2h 05m	77%	1.1%	2,447	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 →	BNA 06:15 → ATL 08:31DL 3001	1h 44m Atlanta	ATL 10:15 → DAL 11:24DL 1115	5h 09m	98%	87%
Southwest Details →	BNA 08:00 → HOU 10:05WN 532	1h 25m Houston	HOU 11:30 → DAL 12:40WN 22	4h 40m	96%	81%
Delta Details →	BNA 05:10 → ATL 07:20DL 2637	52m Atlanta	ATL 08:12 → DAL 09:24DL 441	4h 16m	95%	80%
Southwest Details →	BNA 08:00 → SAT 10:20WN 663	1h 25m San Antonio	SAT 11:45 → DAL 12:55WN 4195	4h 55m	98%	79%
Southwest Details →	BNA 05:02 → HOU 07:02WN 4430	58m Houston	HOU 08:00 → DAL 09:10WN 8	4h 08m	93%	79%
Delta Details →	BNA 10:53 → ATL 13:04DL 1155	55m Atlanta	ATL 13:59 → DAL 15:03DL 512	4h 19m	88%	74%
Southwest Details →	BNA 08:05 → MSY 09:40WN 594	1h 25m New Orleans	MSY 11:05 → DAL 12:30WN 1346	4h 25m	98%	71%
Southwest Details →	BNA 08:00 → AUS 10:10WN 4149	2h 00m Austin	AUS 12:10 → DAL 13:15WN 910	5h 15m	98%	70%
Tight connection: often missed
Southwest Details →	BNA 18:55 → HOU 21:02WN 534	58m Houston	HOU 22:00 → DAL 23:10WN 64	4h 15m	31%	20%
Southwest Details →	BNA 13:55 → HOU 15:55WN 533	1h 05m Houston	HOU 17:00 → DAL 18:10WN 44	4h 15m	41%	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

ATL · 52m · leaves 05:10 5%

HOU · 58m · leaves 05:02 7%

Afternoon and evening

HOU · 58m · leaves 18:55 69%

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 2637 BNA 05:10 → ATL Southwest WN 4394 ATL 08:55 → DAL Connection details →	1h 35m	4h 55m	94%	72%
Southwest WN 893 BNA 12:50 → ATL Delta DL 2780 ATL 16:38 → DAL Connection details →	1h 38m	5h 05m	40%	30%

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