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 87% on time.

Nonstops


Alaska	SJC	PDX	1h 52m	91%	0.7%	1,624	Flying now
Southwest	SJC	PDX	1h 50m	81%	0.0%	947	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


Alaska Details →	SJC 06:17 → SEA 08:34AS 1314	1h 40m Seattle	SEA 10:14 → PDX 11:21AS 3090 · flown by SkyWest	5h 04m	97%	93%
Delta Details →	SJC 17:01 → SLC 19:57DL 1260	2h 53m Salt Lake City	SLC 22:50 → PDX 23:44DL 1373	6h 44m	99%	88%
United Details →	SJC 08:45 → DEN 12:23UA 586	1h 04m Denver	DEN 13:27 → PDX 15:13UA 2455	6h 28m	97%	88%
Delta Details →	SJC 07:00 → LAX 08:27DL 1654	1h 33m Los Angeles	LAX 10:00 → PDX 12:25DL 2766	5h 25m	98%	87%
Delta Details →	SJC 09:45 → SLC 12:48DL 4026 · flown by SkyWest	2h 36m Salt Lake City	SLC 15:24 → PDX 16:19DL 1244	6h 34m	98%	86%
Alaska Details →	SJC 07:13 → SAN 08:43AS 1623	2h 21m San Diego	SAN 11:04 → PDX 13:43AS 576	6h 30m	98%	85%
Delta Details →	SJC 09:55 → LAX 11:20DL 4451 · flown by SkyWest	2h 59m Los Angeles	LAX 14:19 → PDX 16:42DL 2551	6h 47m	98%	84%
Delta Details →	SJC 06:00 → SLC 08:55DL 1314	2h 20m Salt Lake City	SLC 11:15 → PDX 12:10DL 1209	6h 10m	98%	84%
Tight connection: often missed
Southwest Details →	SJC 17:00 → LAS 18:30WN 2266	1h 25m Las Vegas	LAS 19:55 → PDX 22:10WN 2307	5h 10m	74%	51%
Alaska Details →	SJC 18:45 → SEA 21:00AS 481	1h 29m Seattle	SEA 22:29 → PDX 23:30AS 1457	4h 45m	73%	49%
Alaska Details →	SJC 17:28 → SEA 19:39AS 1413	46m Seattle	SEA 20:25 → PDX 21:22AS 2387 · flown by Horizon	3h 54m	54%	45%

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 · 46m · leaves 07:20 14%

Afternoon and evening

SEA · 46m · leaves 17:55 23%

SAN · 1h 09m · leaves 15:15 26%

PHX · 55m · leaves 16:05 65%

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 3632 SJC 06:00 → SEA Alaska AS 3090 SEA 10:14 → PDX Connection details →	1h 54m	5h 21m	100%	96%
Southwest WN 4133 SJC 09:00 → RNO Alaska AS 3121 RNO 12:07 → PDX Connection details →	2h 02m	4h 46m	100%	94%
Southwest WN 4879 SJC 06:30 → ONT Alaska AS 1699 ONT 10:54 → PDX Connection details →	3h 04m	6h 39m	100%	93%

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