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 2% of the time at 7 am and 16% of the time at 6 pm.

Nonstops (seasonal or thin)


United	RDU	SFO	6h 01m	80%	0.5%	886	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

Ranked by chance you reach San Francisco on time. Total trip = scheduled departure to arrival, layover included (San Francisco is 3 h behind Raleigh/Durham). Layovers up to 4 hours. Pick a connection for the details.


United Details →	RDU 06:00 → IAD 07:11UA 1789	1h 24m Dulles	IAD 08:35 → SFO 11:19UA 1147	8h 19m	98%	81%
United Details →	RDU 10:32 → IAD 11:43UA 1535	3h 08m Dulles	IAD 14:51 → SFO 17:38UA 2862	10h 06m	99%	80%
Delta Details →	RDU 05:20 → ATL 06:44DL 1552	1h 41m Atlanta	ATL 08:25 → SFO 10:20DL 693	8h 05m	98%	77%
United Details →	RDU 16:51 → IAH 18:58UA 2407	3h 01m Houston	IAH 21:59 → SFO 00:05 +1UA 1609	10h 14m	98%	77%
United Details →	RDU 08:30 → DEN 10:17UA 2383	3h 08m Denver	DEN 13:25 → SFO 15:09UA 1812	9h 39m	98%	74%
American Details →	RDU 17:24 → LAX 19:45AA 1569	2h 47m Los Angeles	LAX 22:32 → SFO 23:59AA 6510 · flown by SkyWest	9h 35m	91%	73%
JetBlue Details →	RDU 06:00 → BOS 07:59B6 1484	1h 51m Boston	BOS 09:50 → SFO 13:23B6 1833	10h 25m	91%	73%
Delta Details →	RDU 07:30 → ATL 08:59DL 2478	3h 57m Atlanta	ATL 12:56 → SFO 14:50DL 750	10h 24m	98%	71%
Tight connection: often missed
United Details →	RDU 17:12 → ORD 18:42UA 630	1h 22m Chicago	ORD 20:04 → SFO 22:57UA 1495	8h 45m	66%	29%
American Details →	RDU 19:31 → DFW 21:43AA 2361	1h 16m Dallas-Fort Worth	DFW 22:59 → SFO 00:43 +1AA 446	8h 12m	62%	27%
American Details →	RDU 17:30 → MIA 19:49AA 2406	46m Miami	MIA 20:35 → SFO 23:36AA 2426	9h 05m	39%	22%

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

BOS · 1h 09m · leaves 07:00 5%

DTW · 1h 12m · leaves 05:33 5%

IAH · 1h 14m · leaves 06:30 6%

Afternoon and evening

MDW · 1h 02m · leaves 19:28 38%

LAX · 50m · leaves 17:24 40%

MIA · 46m · leaves 17:30 61%

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.


Frontier F9 1741 RDU 10:14 → IAH United UA 589 IAH 15:30 → SFO Connection details →	3h 18m	10h 21m	98%	78%
American AA 4805 RDU 05:15 → JFK Alaska AS 227 JFK 09:30 → SFO Connection details →	2h 18m	10h 37m	98%	77%
Delta DL 1054 RDU 07:00 → BOS United UA 1074 BOS 11:35 → SFO Connection details →	2h 33m	11h 02m	98%	75%

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