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 12% of the time at 8 am and 36% of the time at 10 pm.

Nonstops


American	ORD	GSP	1h 56m	75%	4.2%	968	Flying now
United	ORD	GSP	2h 00m	75%	3.5%	1,117	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


American Details →	ORD 05:07 → CLT 08:10AA 2842	2h 57m Charlotte	CLT 11:07 → GSP 12:14AA 5802 · flown by Piedmont	6h 07m	97%	90%
Delta Details →	ORD 05:30 → ATL 08:33DL 1264	1h 24m Atlanta	ATL 09:57 → GSP 10:57DL 2158	4h 27m	94%	87%
Delta Details →	ORD 06:35 → ATL 09:41DL 1247	3h 31m Atlanta	ATL 13:12 → GSP 14:13DL 1273	6h 38m	98%	85%
American Details →	ORD 06:30 → CLT 09:37AA 1784	3h 28m Charlotte	CLT 13:05 → GSP 14:07AA 5805 · flown by Piedmont	6h 37m	98%	82%
United Details →	ORD 06:30 → IAD 09:24UA 1689	3h 16m Dulles	IAD 12:40 → GSP 14:20UA 4962 · flown by CommuteAir	6h 50m	100%	80%
American Details →	ORD 05:00 → DFW 07:30AA 760	2h 11m Dallas-Fort Worth	DFW 09:41 → GSP 13:09AA 3986 · flown by Envoy	7h 09m	96%	78%
United Details →	ORD 07:05 → DEN 08:55UA 1217	1h 18m Denver	DEN 10:13 → GSP 15:19UA 1786	7h 14m	95%	77%
American Details →	ORD 05:00 → PHL 08:05AA 2970	3h 55m Philadelphia	PHL 12:00 → GSP 14:04AA 6132 · flown by Piedmont	8h 04m	98%	77%
Tight connection: often missed
American Details →	ORD 16:05 → MIA 20:26AA 2910	1h 25m Miami	MIA 21:51 → GSP 23:56AA 3435 · flown by Envoy	6h 48m	60%	47%
American Details →	ORD 13:32 → PHL 16:49AA 1859	59m Philadelphia	PHL 17:48 → GSP 19:49AA 5618 · flown by PSA	5h 17m	67%	42%
American Details →	ORD 18:47 → CLT 21:59AA 689	56m Charlotte	CLT 22:55 → GSP 23:51AA 5504 · flown by PSA	4h 04m	64%	33%

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 18m · leaves 07:05 5%

CLT · 55m · leaves 05:07 12%

DFW · 1h 05m · leaves 06:04 12%

Afternoon and evening

PHL · 59m · leaves 13:32 33%

EWR · 1h 13m · leaves 16:31 34%

CLT · 56m · leaves 18:47 36%

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 425 ORD 07:12 → ATL Delta DL 1273 ATL 13:12 → GSP Connection details →	2h 45m	6h 01m	100%	87%
United UA 5216 ORD 06:30 → CLT American AA 5805 CLT 13:05 → GSP Connection details →	3h 21m	6h 37m	100%	84%
American AA 1363 ORD 08:12 → ATL Delta DL 3095 ATL 15:07 → GSP Connection details →	3h 53m	6h 58m	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