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 6% of the time at 8 am and 1 time in 4 at 7 pm.

Nonstops (seasonal or thin)


Southwest	BWI	GSP	1h 35m	82%	1.5%	720	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. Layovers up to 4 hours. Pick a connection for the details.


American Details →	BWI 06:15 → CLT 07:53AA 2670	3h 14m Charlotte	CLT 11:07 → GSP 12:14AA 5802 · flown by Piedmont	5h 59m	99%	92%
Delta Details →	BWI 05:40 → ATL 07:31DL 2950	2h 26m Atlanta	ATL 09:57 → GSP 10:57DL 2158	5h 17m	99%	90%
Southwest Details →	BWI 06:25 → BNA 07:20WN 874	2h 45m Nashville	BNA 10:05 → GSP 12:15WN 4622	5h 50m	100%	88%
American Details →	BWI 05:02 → CLT 06:26AA 1708	2h 39m Charlotte	CLT 09:05 → GSP 10:12AA 5799 · flown by Piedmont	5h 10m	99%	88%
Delta Details →	BWI 07:00 → ATL 08:56DL 2579	2h 19m Atlanta	ATL 11:15 → GSP 12:18DL 1725	5h 18m	99%	87%
Delta Details →	BWI 08:17 → ATL 10:15DL 2562	2h 57m Atlanta	ATL 13:12 → GSP 14:13DL 1273	5h 56m	99%	84%
American Details →	BWI 05:44 → ORD 07:12AA 4659 · flown by Republic	48m Chicago	ORD 08:00 → GSP 11:03AA 3556 · flown by Envoy	5h 17m	90%	83%
American Details →	BWI 10:06 → CLT 11:39AA 1635	1h 26m Charlotte	CLT 13:05 → GSP 14:07AA 5805 · flown by Piedmont	4h 01m	95%	82%
Tight connection: often missed
American Details →	BWI 20:16 → CLT 21:55AA 1637	1h 00m Charlotte	CLT 22:55 → GSP 23:51AA 5504 · flown by PSA	3h 35m	63%	31%

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

CLT · 1h 12m · leaves 06:15 4%

DTW · 1h 00m · leaves 06:08 6%

ATL · 1h 01m · leaves 07:00 8%

Afternoon and evening

DTW · 51m · leaves 17:32 25%

CLT · 1h 00m · leaves 20:16 37%

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 4689 BWI 06:20 → ATL Delta DL 1725 ATL 11:15 → GSP Connection details →	3h 00m	5h 58m	100%	90%
Southwest WN 148 BWI 08:15 → CLT American AA 5805 CLT 13:05 → GSP Connection details →	3h 10m	5h 52m	100%	86%
Southwest WN 3931 BWI 08:20 → ATL Delta DL 1273 ATL 13:12 → GSP Connection details →	2h 52m	5h 53m	98%	86%

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