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 90-minute layover misses 5% of the time at 10 am and 1 time in 4 at 6 pm.

Nonstops


American	GSP	ORD	2h 19m	78%	4.1%	966	Flying now
United	GSP	ORD	2h 19m	76%	3.6%	1,117	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


Delta Details →	GSP 07:10 → DTW 09:00DL 876	1h 15m Detroit	DTW 10:15 → ORD 10:50DL 3673 · flown by SkyWest	4h 40m	98%	85%
American Details →	GSP 07:00 → CLT 08:16AA 5654 · flown by PSA	2h 45m Charlotte	CLT 11:01 → ORD 12:19AA 2908	6h 19m	96%	85%
United Details →	GSP 07:00 → IAH 08:33UA 4049 · flown by Mesa	1h 02m Houston	IAH 09:35 → ORD 12:29UA 2124	6h 29m	90%	76%
Delta Details →	GSP 05:44 → ATL 06:45DL 3028	2h 17m Atlanta	ATL 09:02 → ORD 10:13DL 1147	5h 29m	99%	75%
American Details →	GSP 07:00 → DCA 08:39AA 5031 · flown by PSA	2h 56m Washington	DCA 11:35 → ORD 12:53AA 489	6h 53m	95%	74%
United Details →	GSP 10:30 → IAD 12:08UA 4958 · flown by CommuteAir	1h 07m Dulles	IAD 13:15 → ORD 14:29UA 2331	4h 59m	93%	74%
American Details →	GSP 07:56 → PHL 09:47AA 5130 · flown by PSA	2h 55m Philadelphia	PHL 12:42 → ORD 14:15AA 2925	7h 19m	97%	73%
United Details →	GSP 06:30 → EWR 08:35UA 3700 · flown by Republic	2h 50m Newark	EWR 11:25 → ORD 13:08UA 1875	7h 38m	99%	73%
Tight connection: often missed
American Details →	GSP 12:54 → DCA 14:29AA 5204 · flown by PSA	1h 23m Washington	DCA 15:52 → ORD 17:25AA 3254	5h 30m	72%	46%
American Details →	GSP 07:01 → DFW 08:44AA 1254	51m Dallas-Fort Worth	DFW 09:35 → ORD 12:14AA 1290	6h 13m	70%	45%
American Details →	GSP 14:29 → PHL 16:29AA 6132 · flown by Piedmont	1h 11m Philadelphia	PHL 17:40 → ORD 19:26AA 1012	5h 57m	72%	36%

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

DTW · 1h 15m · leaves 07:10 2%

ATL · 1h 13m · leaves 06:45 6%

IAH · 1h 02m · leaves 07:00 10%

Afternoon and evening

PHL · 1h 11m · leaves 14:29 28%

CLT · 1h 11m · leaves 18:00 41%

DCA · 1h 08m · leaves 19:20 49%

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 4705 GSP 07:00 → BNA American AA 3973 BNA 09:04 → ORD Connection details →	1h 54m	5h 00m	96%	87%
Delta DL 876 GSP 07:10 → DTW American AA 4103 DTW 10:33 → ORD Connection details →	1h 33m	4h 58m	90%	83%
Delta DL 1146 GSP 06:45 → ATL United UA 1239 ATL 11:29 → ORD Connection details →	3h 40m	7h 07m	97%	78%

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