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

Nonstops (seasonal or thin)


Southwest	CHS	DAL	2h 50m	80%	0.8%	365	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 Charleston). Layovers up to 4 hours. Pick a connection for the details.


Delta Details →	CHS 05:10 → ATL 06:21DL 3055	3h 54m Atlanta	ATL 10:15 → DAL 11:24DL 1115	7h 14m	100%	88%
Delta Details →	CHS 09:41 → ATL 11:00DL 5450 · flown by Endeavor	2h 59m Atlanta	ATL 13:59 → DAL 15:03DL 512	6h 31m	100%	85%
Delta Details →	CHS 06:15 → ATL 07:25DL 2124	47m Atlanta	ATL 08:12 → DAL 09:24DL 441	4h 11m	88%	76%
Delta Details →	CHS 17:03 → ATL 18:24DL 1381	2h 51m Atlanta	ATL 21:15 → DAL 22:34DL 1104	6h 31m	97%	76%
Southwest Details →	CHS 12:00 → HOU 13:30WN 356	2h 30m Houston	HOU 16:00 → DAL 17:10WN 40	6h 10m	100%	74%
Delta Details →	CHS 13:05 → ATL 14:20DL 3107	2h 18m Atlanta	ATL 16:38 → DAL 17:55DL 2780	5h 50m	98%	74%
Southwest Details →	CHS 06:30 → BNA 06:55WN 1141	1h 10m Nashville	BNA 08:05 → DAL 10:00WN 486	4h 30m	96%	71%
Southwest Details →	CHS 07:35 → MDW 08:45WN 4167	1h 15m Chicago	MDW 10:00 → DAL 12:15WN 1487	5h 40m	96%	71%
Tight connection: often missed
Southwest Details →	CHS 13:55 → BNA 14:30WN 899	55m Nashville	BNA 15:25 → DAL 17:20WN 489	4h 25m	60%	31%
Southwest Details →	CHS 16:45 → STL 17:50WN 493	52m St Louis	STL 18:42 → DAL 20:22WN 3597	4h 37m	57%	30%
Southwest Details →	CHS 13:30 → AUS 15:10WN 1140	55m Austin	AUS 16:05 → DAL 17:15WN 277	4h 45m	38%	24%

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

MDW · 1h 15m · leaves 07:35 4%

BNA · 1h 10m · leaves 06:30 4%

ATL · 47m · leaves 06:15 12%

Afternoon and evening

ATL · 53m · leaves 14:27 19%

STL · 52m · leaves 16:45 43%

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 3055 CHS 05:10 → ATL Southwest WN 4394 ATL 08:55 → DAL Connection details →	2h 34m	5h 55m	98%	76%
American AA 3235 CHS 06:41 → CLT Southwest WN 148 CLT 10:35 → DAL Connection details →	2h 48m	6h 24m	99%	72%
Delta DL 5450 CHS 09:41 → ATL Southwest WN 194 ATL 14:10 → DAL Connection details →	3h 10m	6h 39m	98%	58%

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