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 MDW → CHS flights land within a few points of 3 in 4 on time whatever the hour.

Nonstops (seasonal or thin)


Southwest	MDW	CHS	2h 05m	75%	1.4%	367	Flying now

Best connections, any airlines

Most reliable Quickest (80%+ on time)

Ranked by chance you reach Charleston on time. Total trip = scheduled departure to arrival, layover included (Charleston is 1 h ahead of Chicago). Layovers up to 4 hours. Pick a connection for the details.


Southwest + Deltatwo ticketsDetails →	MDW 07:15 → ATL 10:05WN 3054	2h 24m Atlanta	ATL 12:29 → CHS 13:41DL 2179	5h 26m	100%	84%
Delta Details →	MDW 06:00 → ATL 08:55DL 1285	1h 51m Atlanta	ATL 10:46 → CHS 12:00DL 3107	5h 00m	94%	83%
Southwest + Deltatwo ticketsDetails →	MDW 08:55 → ATL 11:45WN 4154	2h 57m Atlanta	ATL 14:42 → CHS 15:58DL 1381	6h 03m	99%	81%
Delta Details →	MDW 12:50 → ATL 15:49DL 2417	3h 44m Atlanta	ATL 19:33 → CHS 20:47DL 2493	6h 57m	98%	77%
Delta Details →	MDW 11:05 → ATL 14:01DL 1063	1h 58m Atlanta	ATL 15:59 → CHS 17:18DL 2174	5h 11m	97%	77%
Southwest + Deltatwo ticketsDetails →	MDW 11:00 → ATL 13:50WN 4606	3h 52m Atlanta	ATL 17:42 → CHS 18:54DL 3179	6h 57m	100%	75%
Delta Details →	MDW 17:10 → ATL 20:22DL 1728	2h 48m Atlanta	ATL 23:10 → CHS 00:36 +1DL 2850	6h 16m	95%	74%
Southwest + Americantwo ticketsDetails →	MDW 08:05 → LGA 11:20WN 2038	3h 39m New York	LGA 14:59 → CHS 17:23AA 4588 · flown by Republic	8h 18m	100%	74%

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.

The table above includes two-ticket connections (marked “two tickets”), held to the 90-minute minimum. One ticket only →

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