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 3 in 4 on time.

Nonstops (seasonal or thin)


Southwest	SJC	GEG	2h 05m	76%	0.0%	238	Flying now
Alaska	SJC	GEG	–	83%few flights	0.0%	6	Not flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


Alaska Details →	SJC 09:46 → PDX 11:31AS 2256 · flown by Horizon	2h 59m Portland	PDX 14:30 → GEG 15:41AS 3262 · flown by SkyWest	5h 55m	98%	96%
Delta Details →	SJC 09:55 → LAX 11:20DL 4451 · flown by SkyWest	1h 46m Los Angeles	LAX 13:06 → GEG 15:48DL 3794 · flown by SkyWest	5h 53m	98%	91%
Delta Details →	SJC 11:29 → SEA 13:59DL 3736 · flown by SkyWest	1h 41m Seattle	SEA 15:40 → GEG 16:57DL 3857 · flown by SkyWest	5h 28m	96%	89%
Delta Details →	SJC 14:51 → SEA 17:14DL 3789 · flown by SkyWest	2h 42m Seattle	SEA 19:56 → GEG 21:12DL 3677 · flown by SkyWest	6h 21m	97%	86%
Delta Details →	SJC 16:30 → LAX 17:56DL 3822 · flown by SkyWest	3h 29m Los Angeles	LAX 21:25 → GEG 00:05 +1DL 3576 · flown by SkyWest	7h 35m	100%	86%
United Details →	SJC 08:45 → DEN 12:23UA 586	1h 23m Denver	DEN 13:46 → GEG 15:12UA 324	6h 26m	99%	86%
Alaska Details →	SJC 06:17 → SEA 08:34AS 1314	1h 21m Seattle	SEA 09:55 → GEG 11:00AS 2200 · flown by Horizon	4h 43m	95%	85%
Alaska Details →	SJC 14:31 → PDX 16:15AS 1633	1h 15m Portland	PDX 17:30 → GEG 18:44AS 3052 · flown by SkyWest	4h 13m	98%	82%
Tight connection: often missed
Alaska Details →	SJC 08:20 → SEA 10:31AS 1426	52m Seattle	SEA 11:23 → GEG 12:29AS 449	4h 09m	28%	17%

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

PDX · 46m · leaves 08:00 9%

SEA · 46m · leaves 07:20 14%

Afternoon and evening

PDX · 1h 15m · leaves 14:31 2%

SLC · 1h 08m · leaves 19:10 14%

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 1311 SJC 10:19 → SEA Delta DL 3857 SEA 15:40 → GEG Connection details →	3h 10m	6h 38m	100%	91%
Southwest WN 3632 SJC 06:00 → SEA Alaska AS 2200 SEA 09:55 → GEG Connection details →	1h 35m	5h 00m	100%	90%
Southwest WN 4982 SJC 14:10 → SEA Delta DL 3677 SEA 19:56 → GEG Connection details →	3h 36m	7h 02m	100%	89%

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