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 3% of the time at 7 am and 1 time in 5 at 6 pm.

Nonstops (seasonal or thin)


United	GSP	IAD	1h 35m	86%	1.7%	864	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

Ranked by chance you reach Dulles on time. Total trip = scheduled departure to arrival, layover included. Layovers up to 4 hours. Pick a connection for the details.


United Details →	GSP 06:10 → ORD 07:30UA 4728 · flown by SkyWest	1h 10m Chicago	ORD 08:40 → IAD 11:52UA 2277	5h 42m	97%	90%
Delta Details →	GSP 05:44 → ATL 06:45DL 3028	3h 05m Atlanta	ATL 09:50 → IAD 11:39DL 1444	5h 54m	99%	82%
Delta Details →	GSP 08:52 → ATL 09:57DL 1619	2h 20m Atlanta	ATL 12:17 → IAD 14:02DL 2135	5h 10m	98%	81%
Delta Details →	GSP 11:12 → DTW 13:00DL 5195 · flown by Endeavor	2h 10m Detroit	DTW 15:10 → IAD 16:42DL 1787	5h 30m	96%	80%
American Details →	GSP 07:00 → CLT 08:16AA 5654 · flown by PSA	2h 49m Charlotte	CLT 11:05 → IAD 12:38AA 5220 · flown by PSA	5h 38m	96%	78%
Delta Details →	GSP 10:03 → ATL 11:05DL 3089	3h 54m Atlanta	ATL 14:59 → IAD 16:47DL 1695	6h 44m	99%	74%
Delta Details →	GSP 15:21 → ATL 16:26DL 1273	2h 49m Atlanta	ATL 19:15 → IAD 21:03DL 1309	5h 43m	97%	71%
United Details →	GSP 10:45 → ORD 11:59UA 5361 · flown by SkyWest	1h 31m Chicago	ORD 13:30 → IAD 16:30UA 2794	5h 45m	87%	66%
Tight connection: often missed
Delta Details →	GSP 18:55 → DTW 20:48DL 5090 · flown by Endeavor	50m Detroit	DTW 21:38 → IAD 23:14DL 3988 · flown by SkyWest	4h 19m	60%	37%
American Details →	GSP 16:07 → CLT 17:23AA 6131 · flown by Piedmont	47m Charlotte	CLT 18:10 → IAD 19:34AA 1450	3h 33m	59%	29%
American Details →	GSP 18:18 → CLT 19:34AA 5203 · flown by PSA	57m Charlotte	CLT 20:31 → IAD 22:05AA 5549 · flown by PSA	3h 47m	38%	20%

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

ATL · 58m · leaves 05:44 3%

CLT · 49m · leaves 09:00 21%

Afternoon and evening

ATL · 50m · leaves 17:16 20%

DTW · 50m · leaves 18:55 40%

CLT · 47m · leaves 16:07 41%

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.


American AA 3385 GSP 07:20 → ORD United UA 1869 ORD 11:07 → IAD Connection details →	2h 21m	6h 52m	100%	89%
Delta DL 3028 GSP 05:44 → ATL United UA 632 ATL 09:25 → IAD Connection details →	2h 40m	5h 31m	99%	84%
American AA 5908 GSP 10:37 → PHL United UA 3593 PHL 15:10 → IAD Connection details →	2h 38m	5h 41m	97%	79%

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