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

No clear winner: airlines and hours on this route all land within a few points of 4 in 5 on time.

Nonstops (seasonal or thin)


Southwest	EUG	SAN	2h 30m	80%	0.0%	142	Flying now
Alaska	EUG	SAN	2h 30m	80%	1.4%	497	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


Delta Details →	EUG 16:43 → SLC 19:41DL 4105 · flown by SkyWest	3h 14m Salt Lake City	SLC 22:55 → SAN 23:50DL 1202	7h 10m	100%	82%
Delta Details →	EUG 06:00 → SLC 08:53DL 3708 · flown by SkyWest	2h 22m Salt Lake City	SLC 11:15 → SAN 12:17DL 1296	6h 17m	99%	82%
United Details →	EUG 05:00 → DEN 08:37UA 1241	2h 38m Denver	DEN 11:15 → SAN 12:41UA 1940	7h 41m	98%	81%
Delta Details →	EUG 06:13 → SEA 07:40DL 4128 · flown by SkyWest	2h 05m Seattle	SEA 09:45 → SAN 12:38DL 2533	6h 25m	98%	80%
Delta Details →	EUG 12:32 → SEA 13:59DL 4139 · flown by SkyWest	1h 26m Seattle	SEA 15:25 → SAN 18:13DL 2613	5h 41m	93%	78%
Alaska Details →	EUG 05:20 → PDX 06:06AS 2053 · flown by Horizon	1h 26m Portland	PDX 07:32 → SAN 10:05AS 577	4h 45m	98%	78%
Alaska Details →	EUG 17:43 → SEA 18:52AS 2339 · flown by Horizon	2h 12m Seattle	SEA 21:04 → SAN 23:56AS 1472	6h 13m	97%	77%
Southwest Details →	EUG 06:10 → DEN 09:40WN 1828	52m Denver	DEN 10:32 → SAN 12:00WN 1700	5h 47m	94%	75%
Tight connection: often missed
United Details →	EUG 13:59 → SFO 15:35UA 2077	1h 12m San Francisco	SFO 16:47 → SAN 18:39UA 1561	4h 40m	69%	41%
Southwest Details →	EUG 18:40 → SJC 20:15WN 1839	50m San Jose	SJC 21:05 → SAN 22:30WN 4265	3h 53m	52%	25%
Southwest Details →	EUG 14:45 → DEN 18:15WN 2843	1h 00m Denver	DEN 19:15 → SAN 20:40WN 1703	5h 55m	35%	7%

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

DEN · 52m · leaves 06:10 6%

Afternoon and evening

PHX · 50m · leaves 13:39 25%

SFO · 1h 12m · leaves 13:59 31%

SJC · 50m · leaves 18:40 48%

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 2323 EUG 12:55 → LAX United UA 5415 LAX 18:50 → SAN Connection details →	3h 39m	6h 56m	98%	82%
Alaska AS 3324 EUG 08:18 → LAX Delta DL 4001 LAX 14:11 → SAN Connection details →	3h 26m	6h 53m	100%	81%
Alaska AS 2046 EUG 06:00 → SEA Delta DL 2533 SEA 09:45 → SAN Connection details →	2h 37m	6h 38m	99%	81%

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