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

No clear winner: Southwest’s GEG → OAK flights land within a few points of 9 in 10 on time whatever the hour.

Nonstops (seasonal or thin)


Southwest	GEG	OAK	2h 10m	91%	0.0%	381	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 →	GEG 12:42 → PDX 13:52AS 251	3h 41m Portland	PDX 17:33 → OAK 19:23AS 2082 · flown by Horizon	6h 41m	100%	96%
Alaska Details →	GEG 05:00 → PDX 06:10AS 710	3h 19m Portland	PDX 09:29 → OAK 11:21AS 3055 · flown by SkyWest	6h 21m	99%	95%
Delta Details →	GEG 17:10 → SLC 19:59DL 1503	2h 51m Salt Lake City	SLC 22:50 → OAK 23:50DL 3797 · flown by SkyWest	6h 41m	98%	92%
Delta Details →	GEG 09:50 → SLC 12:41DL 4444 · flown by SkyWest	2h 39m Salt Lake City	SLC 15:20 → OAK 16:23DL 3903 · flown by SkyWest	6h 33m	100%	91%
Southwest Details →	GEG 05:25 → PHX 08:00WN 1884	1h 40m Phoenix	PHX 09:40 → OAK 11:35WN 2680	6h 10m	97%	90%
Delta Details →	GEG 05:20 → SLC 08:00DL 1440	2h 45m Salt Lake City	SLC 10:45 → OAK 11:53DL 4134 · flown by SkyWest	6h 33m	98%	89%
Alaska Details →	GEG 05:07 → SEA 06:15AS 2065 · flown by Horizon	57m Seattle	SEA 07:12 → OAK 09:26AS 533	4h 19m	96%	89%
Alaska Details →	GEG 15:16 → PDX 16:32AS 3202 · flown by SkyWest	3h 22m Portland	PDX 19:54 → OAK 21:41AS 2036 · flown by Horizon	6h 25m	98%	88%
Tight connection: often missed
Alaska Details →	GEG 15:16 → PDX 16:32AS 3202 · flown by SkyWest	1h 01m Portland	PDX 17:33 → OAK 19:23AS 2082 · flown by Horizon	4h 07m	18%	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.

Morning

SEA · 57m · leaves 05:07 4%

Afternoon and evening

SLC · 56m · leaves 19:08 15%

DEN · 1h 20m · leaves 14:15 20%

PDX · 1h 01m · leaves 15:16 82%

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 3201 GEG 08:31 → PDX Southwest WN 4928 PDX 12:25 → OAK Connection details →	2h 39m	5h 39m	100%	82%
Delta DL 3696 GEG 06:20 → LAX Southwest WN 4893 LAX 11:55 → OAK Connection details →	2h 39m	6h 55m	98%	79%
Alaska AS 3349 GEG 11:51 → LAX Southwest WN 2418 LAX 17:45 → OAK Connection details →	2h 59m	7h 14m	98%	78%

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