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 16% of the time at 10 am and 28% of the time at 8 pm.

Nonstops


United	IAD	CHS	1h 51m	85%	1.2%	1,034	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


Delta Details →	IAD 06:00 → ATL 07:46DL 2127	3h 00m Atlanta	ATL 10:46 → CHS 12:00DL 3107	6h 00m	98%	87%
Delta Details →	IAD 06:00 → DTW 07:40DL 3826 · flown by SkyWest	2h 25m Detroit	DTW 10:05 → CHS 12:20DL 5431 · flown by Endeavor	6h 20m	96%	84%
American Details →	IAD 06:33 → CLT 08:00AA 1216	3h 10m Charlotte	CLT 11:10 → CHS 12:19AA 1658	5h 46m	97%	80%
Delta Details →	IAD 08:27 → ATL 10:17DL 3080	2h 12m Atlanta	ATL 12:29 → CHS 13:41DL 2179	5h 14m	95%	79%
United Details →	IAD 08:29 → EWR 09:55UA 2396	2h 15m Newark	EWR 12:10 → CHS 14:16UA 1760	5h 47m	99%	78%
United Details →	IAD 08:15 → ORD 09:36UA 1775	59m Chicago	ORD 10:35 → CHS 14:06UA 3646 · flown by Republic	5h 51m	84%	76%
Delta Details →	IAD 10:21 → ATL 12:05DL 1324	3h 54m Atlanta	ATL 15:59 → CHS 17:18DL 2174	6h 55m	98%	76%
American Details →	IAD 05:03 → CLT 06:35AA 5054 · flown by PSA	2h 24m Charlotte	CLT 08:59 → CHS 10:07AA 1666	5h 04m	94%	76%
Tight connection: often missed
Delta Details →	IAD 17:51 → ATL 19:54DL 1695	56m Atlanta	ATL 20:50 → CHS 22:06DL 1663	4h 15m	72%	49%
Delta Details →	IAD 15:02 → ATL 16:54DL 2135	48m Atlanta	ATL 17:42 → CHS 18:54DL 3179	3h 55m	66%	49%
United Details →	IAD 15:39 → ORD 17:02UA 1393	1h 23m Chicago	ORD 18:25 → CHS 21:48UA 2362	6h 09m	72%	43%

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

IAH · 1h 16m · leaves 08:40 7%

ATL · 1h 14m · leaves 06:00 7%

ORD · 59m · leaves 08:15 16%

Afternoon and evening

CLT · 55m · leaves 20:22 32%

ATL · 48m · leaves 15:02 34%

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.


United UA 2739 IAD 08:15 → ATL Delta DL 2179 ATL 12:29 → CHS Connection details →	2h 15m	5h 26m	95%	80%
United UA 2081 IAD 17:17 → ATL Delta DL 2850 ATL 23:10 → CHS Connection details →	3h 54m	7h 09m	96%	76%
Frontier F9 1081 IAD 11:17 → ATL Delta DL 2174 ATL 15:59 → CHS Connection details →	2h 41m	5h 59m	90%	72%

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