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 75-minute layover misses 4% of the time at 11 am and 1 time in 5 at 5 pm.

Nonstops (seasonal or thin)


United	DEN	GSP	3h 05m	87%	1.1%	364	Flying now
Southwest	DEN	GSP	–	100%few flights	0.0%	2	Not 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 2 h ahead of Denver). Layovers up to 4 hours. Pick a connection for the details.


American Details →	DEN 23:59 → CLT 05:13AA 3156	2h 03m Charlotte	CLT 07:16 → GSP 08:18 +1AA 5798 · flown by Piedmont	6h 19m	97%	90%
Delta Details →	DEN 00:40 → ATL 05:42DL 302	2h 33m Atlanta	ATL 08:15 → GSP 09:18DL 3089	6h 38m	99%	88%
United Details →	DEN 23:59 → IAD 05:27UA 1924	2h 48m Dulles	IAD 08:15 → GSP 09:55 +1UA 4961 · flown by CommuteAir	7h 56m	100%	85%
Delta Details →	DEN 05:45 → ATL 10:42DL 341	2h 30m Atlanta	ATL 13:12 → GSP 14:13DL 1273	6h 28m	98%	85%
American Details →	DEN 23:55 → PHL 05:32AA 2500	3h 12m Philadelphia	PHL 08:44 → GSP 10:50 +1AA 5800 · flown by Piedmont	8h 55m	93%	84%
American Details →	DEN 06:41 → CLT 12:04AA 573	1h 01m Charlotte	CLT 13:05 → GSP 14:07AA 5805 · flown by Piedmont	5h 26m	94%	81%
United Details →	DEN 23:59 → EWR 05:40UA 1745	2h 50m Newark	EWR 08:30 → GSP 10:37 +1UA 3604 · flown by Republic	8h 38m	100%	79%
American Details →	DEN 05:00 → DFW 08:05AA 2612	1h 36m Dallas-Fort Worth	DFW 09:41 → GSP 13:09AA 3986 · flown by Envoy	6h 09m	96%	79%
Tight connection: often missed
Southwest Details →	DEN 05:45 → BNA 09:15WN 1483	50m Nashville	BNA 10:05 → GSP 12:15WN 4622	4h 30m	73%	64%
American Details →	DEN 15:57 → CLT 21:27AA 1735	1h 28m Charlotte	CLT 22:55 → GSP 23:51AA 5504 · flown by PSA	5h 54m	68%	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

IAH · 1h 15m · leaves 07:42 4%

IAD · 59m · leaves 06:13 6%

Afternoon and evening

EWR · 59m · leaves 10:02 16%

ORD · 1h 12m · leaves 13:25 21%

ATL · 58m · leaves 13:15 24%

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 1214 DEN 23:59 → PHL American AA 5800 PHL 08:44 → GSP Connection details →	3h 13m	8h 51m	98%	91%
Frontier F9 1450 DEN 23:46 → ATL Delta DL 3089 ATL 08:15 → GSP Connection details →	3h 13m	7h 32m	96%	84%
Frontier F9 3294 DEN 06:30 → ATL Delta DL 3095 ATL 15:07 → GSP Connection details →	3h 29m	7h 40m	99%	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