Itineraries flown on 20+ days in the Jun 6 – Jul 31, 2026 schedule · each leg’s record Aug 2025 – Jul 2026

No clear winner: United’s SFO → ACV flights land within a few points of 3 in 4 on time whatever the hour.

Nonstops


United	SFO	ACV	1h 27m	74%	2.7%	1,294	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


United Details →	SFO 08:50 → LAX 10:34UA 1896	2h 11m Los Angeles	LAX 12:45 → ACV 14:48UA 5384 · flown by SkyWest	5h 58m	99%	87%
United Details →	SFO 05:00 → DEN 08:35UA 1479	2h 45m Denver	DEN 11:20 → ACV 13:24UA 5506 · flown by SkyWest	8h 24m	99%	80%
United Details →	SFO 16:25 → LAX 18:05UA 1754	2h 10m Los Angeles	LAX 20:15 → ACV 22:18UA 5441 · flown by SkyWest	5h 53m	94%	78%
Alaska Details →	SFO 07:03 → SEA 09:13AS 68	3h 13m Seattle	SEA 12:26 → ACV 14:13AS 3220 · flown by SkyWest	7h 10m	99%	66%
Tight connection: often missed
United Details →	SFO 10:19 → LAX 11:57UA 2367	48m Los Angeles	LAX 12:45 → ACV 14:48UA 5384 · flown by SkyWest	4h 29m	60%	53%

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

SEA · 1h 11m · leaves 09:00 23%

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.


Alaska AS 1329 SFO 08:30 → LAX United UA 5384 LAX 12:45 → ACV Connection details →	2h 38m	6h 18m	95%	82%
Southwest WN 1424 SFO 05:10 → DEN United UA 5506 DEN 11:20 → ACV Connection details →	2h 40m	8h 14m	100%	81%
Frontier F9 3308 SFO 15:26 → LAX United UA 5441 LAX 20:15 → ACV Connection details →	3h 08m	6h 52m	92%	76%

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