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

Connect in the morning. The same one-hour layover misses 2% of the time at 6 am and 1 time in 3 at 6 pm.

Nonstops (seasonal or thin)


United	CHS	DEN	4h 05m	75%	0.7%	439	Flying now
Southwest	CHS	DEN	3h 55m	62%	0.5%	204	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

Ranked by chance you reach Denver on time. Total trip = scheduled departure to arrival, layover included (Denver is 2 h behind Charleston). Layovers up to 4 hours. Pick a connection for the details.


United Details →	CHS 06:00 → ORD 07:33UA 2333	3h 21m Chicago	ORD 10:54 → DEN 12:45UA 581	8h 45m	98%	94%
Delta Details →	CHS 05:10 → ATL 06:21DL 3055	1h 04m Atlanta	ATL 07:25 → DEN 08:35DL 2235	5h 25m	98%	89%
American Details →	CHS 05:00 → CLT 06:01AA 3298	1h 38m Charlotte	CLT 07:39 → DEN 09:10AA 1754	6h 10m	98%	89%
Delta Details →	CHS 08:20 → ATL 09:34DL 789	3h 16m Atlanta	ATL 12:50 → DEN 14:04DL 957	7h 44m	100%	88%
American Details →	CHS 06:00 → MIA 07:43AA 1287	1h 14m Miami	MIA 08:57 → DEN 11:19AA 1739	7h 19m	94%	88%
United Details →	CHS 17:00 → IAH 18:55UA 6329 · flown by Mesa	3h 15m Houston	IAH 22:10 → DEN 23:57UA 1066	8h 57m	98%	87%
United Details →	CHS 10:00 → IAD 11:37UA 1858	1h 11m Dulles	IAD 12:48 → DEN 14:42UA 1587	6h 42m	94%	86%
Delta Details →	CHS 07:20 → ATL 08:34DL 1664	3h 11m Atlanta	ATL 11:45 → DEN 12:59DL 706	7h 39m	99%	85%
Tight connection: often missed
Delta Details →	CHS 15:45 → LGA 17:50DL 1404	1h 09m New York	LGA 18:59 → DEN 21:33DL 710	7h 47m	68%	38%
Southwest Details →	CHS 16:45 → STL 17:50WN 493	50m St Louis	STL 18:40 → DEN 20:00WN 3913	5h 15m	54%	26%
American Details →	CHS 15:42 → DFW 17:39AA 1656	51m Dallas-Fort Worth	DFW 18:30 → DEN 19:41AA 2235	5h 59m	46%	20%

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 04m · leaves 05:10 2%

MDW · 1h 10m · leaves 07:35 4%

BNA · 1h 00m · leaves 06:30 4%

Afternoon and evening

LGA · 1h 09m · leaves 15:45 32%

STL · 50m · leaves 16:45 46%

DFW · 51m · leaves 15:42 54%

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 1141 CHS 06:30 → BNA United UA 502 BNA 10:26 → DEN Connection details →	3h 31m	7h 53m	100%	92%
Delta DL 2124 CHS 06:15 → ATL United UA 1327 ATL 11:10 → DEN Connection details →	3h 45m	8h 13m	97%	87%
American AA 3027 CHS 07:30 → ORD United UA 581 ORD 10:54 → DEN Connection details →	1h 49m	7h 15m	91%	86%

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