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 77% on time.

Nonstops


Alaska	SEA	OAK	2h 11m	81%	1.4%	1,256	Flying now
Southwest	SEA	OAK	2h 10m	73%	0.2%	1,102	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


Alaska Details →	SEA 10:14 → PDX 11:21AS 3090 · flown by SkyWest	3h 47m Portland	PDX 15:08 → OAK 16:55AS 2035 · flown by Horizon	6h 41m	100%	98%
Alaska Details →	SEA 13:45 → PDX 14:48AS 3204 · flown by SkyWest	2h 45m Portland	PDX 17:33 → OAK 19:23AS 2082 · flown by Horizon	5h 38m	97%	96%
Alaska Details →	SEA 06:42 → PDX 07:37AS 2432 · flown by Horizon	1h 52m Portland	PDX 09:29 → OAK 11:21AS 3055 · flown by SkyWest	4h 39m	100%	94%
Alaska Details →	SEA 15:55 → PDX 16:55AS 686	2h 59m Portland	PDX 19:54 → OAK 21:41AS 2036 · flown by Horizon	5h 46m	100%	90%
Delta Details →	SEA 05:30 → SLC 08:30DL 1128	2h 15m Salt Lake City	SLC 10:45 → OAK 11:53DL 4134 · flown by SkyWest	6h 23m	98%	90%
Delta Details →	SEA 09:30 → SLC 12:38DL 1016	2h 42m Salt Lake City	SLC 15:20 → OAK 16:23DL 3903 · flown by SkyWest	6h 53m	99%	89%
Delta Details →	SEA 17:59 → SLC 21:09DL 1165	1h 41m Salt Lake City	SLC 22:50 → OAK 23:50DL 3797 · flown by SkyWest	5h 52m	92%	87%
Alaska Details →	SEA 07:26 → SAN 10:23AS 1471	2h 07m San Diego	SAN 12:30 → OAK 14:10AS 3218 · flown by SkyWest	6h 44m	98%	83%
Tight connection: often missed
Alaska Details →	SEA 17:59 → PDX 18:56AS 2302 · flown by Horizon	58m Portland	PDX 19:54 → OAK 21:41AS 2036 · flown by Horizon	3h 42m	73%	66%
Southwest Details →	SEA 14:25 → SAN 17:20WN 4910	1h 00m San Diego	SAN 18:20 → OAK 19:55WN 3017	5h 30m	41%	21%
Southwest Details →	SEA 17:20 → PHX 20:15WN 3354	1h 07m Phoenix	PHX 21:22 → OAK 23:15WN 3306	5h 54m	30%	18%

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.

Afternoon and evening

PDX · 58m · leaves 17:59 27%

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.


Delta DL 3802 SEA 10:35 → PDX Alaska AS 2035 PDX 15:08 → OAK Connection details →	3h 26m	6h 20m	98%	97%
Delta DL 4062 SEA 13:35 → PDX Alaska AS 2082 PDX 17:33 → OAK Connection details →	2h 47m	5h 48m	98%	96%
Alaska AS 373 SEA 16:47 → SLC Delta DL 3797 SLC 22:50 → OAK Connection details →	3h 00m	7h 04m	98%	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