Itineraries flown on 20+ days in the Jun 6 – Jul 31, 2026 schedule · each leg’s record Aug 2025 – Jul 2026

No clear winner: airlines and hours on this route all land within a few points of 82% on time.

Nonstops


Delta	ATL	DAL	2h 14m	85%	2.1%	1,827	Flying now
Southwest	ATL	DAL	2h 15m	78%	1.5%	1,523	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 Atlanta). Layovers up to 4 hours. Pick a connection for the details.


Southwest Details →	ATL 06:30 → HOU 07:35WN 4729	3h 55m Houston	HOU 11:30 → DAL 12:40WN 22	7h 10m	100%	81%
Southwest Details →	ATL 09:30 → HOU 10:35WN 4914	2h 55m Houston	HOU 13:30 → DAL 14:40WN 30	6h 10m	100%	75%
Southwest Details →	ATL 06:25 → DEN 07:30WN 2114	2h 35m Denver	DEN 10:05 → DAL 13:10WN 1518	7h 45m	100%	73%
Southwest Details →	ATL 07:10 → BNA 07:15WN 179	3h 55m Nashville	BNA 11:10 → DAL 13:05WN 487	6h 55m	98%	66%
Southwest Details →	ATL 16:05 → HOU 17:15WN 206	3h 15m Houston	HOU 20:30 → DAL 21:40WN 54	6h 35m	96%	65%
Southwest Details →	ATL 08:00 → MDW 08:55WN 1270	3h 25m Chicago	MDW 12:20 → DAL 14:35WN 2757	7h 35m	96%	65%
Southwest Details →	ATL 10:55 → MCI 12:00WN 3931	1h 00m Kansas City	MCI 13:00 → DAL 14:35WN 4759	4h 40m	85%	62%
Southwest Details →	ATL 10:15 → BWI 12:10WN 186	2h 05m Baltimore	BWI 14:15 → DAL 16:15WN 932	7h 00m	98%	61%
Tight connection: often missed
Southwest Details →	ATL 18:30 → TPA 20:05WN 245	1h 25m Tampa	TPA 21:30 → DAL 22:55WN 4015	5h 25m	61%	27%
Southwest Details →	ATL 18:20 → DEN 19:40WN 3002	50m Denver	DEN 20:30 → DAL 23:30WN 1523	6h 10m	21%	8%
Southwest Details →	ATL 20:20 → STL 21:00WN 241	50m St Louis	STL 21:50 → DAL 23:30WN 3904	4h 10m	9%	3%

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

DEN · 1h 15m · leaves 06:25 0%

MCO · 1h 10m · leaves 07:40 8%

MDW · 1h 05m · leaves 08:00 18%

Afternoon and evening

DEN · 50m · leaves 18:20 79%

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 3069 ATL 08:31 → BNA Southwest WN 5046 BNA 12:20 → DAL Connection details →	3h 37m	6h 44m	99%	82%
Delta DL 1509 ATL 08:20 → HOU Southwest WN 26 HOU 12:30 → DAL Connection details →	3h 02m	6h 20m	98%	78%
Delta DL 1004 ATL 09:05 → ABQ Southwest WN 106 ABQ 13:05 → DAL Connection details →	2h 45m	7h 45m	99%	76%

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