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 88% on time.

Nonstops (seasonal or thin)


Alaska	GEG	SAN	2h 52m	92%	0.8%	364	Flying now
Southwest	GEG	SAN	2h 40m	66%	0.0%	55	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 →	GEG 16:20 → LAX 19:14DL 3799 · flown by SkyWest	3h 26m Los Angeles	LAX 22:40 → SAN 23:40DL 3746 · flown by SkyWest	7h 20m	100%	86%
Alaska Details →	GEG 08:31 → PDX 09:46AS 3201 · flown by SkyWest	1h 00m Portland	PDX 10:46 → SAN 13:27AS 1394	4h 56m	98%	82%
United Details →	GEG 05:00 → DEN 08:20UA 1234	2h 55m Denver	DEN 11:15 → SAN 12:41UA 1940	7h 41m	99%	81%
Delta Details →	GEG 05:20 → SLC 08:00DL 1440	3h 15m Salt Lake City	SLC 11:15 → SAN 12:17DL 1296	6h 57m	98%	80%
Delta Details →	GEG 11:15 → SEA 12:43DL 3824 · flown by SkyWest	2h 42m Seattle	SEA 15:25 → SAN 18:13DL 2613	6h 58m	97%	80%
Delta Details →	GEG 17:10 → SLC 19:59DL 1503	2h 56m Salt Lake City	SLC 22:55 → SAN 23:50DL 1202	6h 43m	99%	80%
Southwest Details →	GEG 06:00 → DEN 09:10WN 1333	1h 22m Denver	DEN 10:32 → SAN 12:00WN 1700	5h 57m	99%	78%
Delta Details →	GEG 05:30 → SEA 06:40DL 2218	3h 05m Seattle	SEA 09:45 → SAN 12:38DL 2533	7h 08m	97%	78%
Tight connection: often missed
Alaska Details →	GEG 14:39 → SEA 15:49AS 2119 · flown by Horizon	56m Seattle	SEA 16:45 → SAN 19:36AS 1348	4h 57m	61%	36%
Southwest Details →	GEG 17:30 → SMF 19:25WN 1890	1h 00m Sacramento	SMF 20:25 → SAN 22:00WN 3822	4h 27m	62%	27%
Alaska Details →	GEG 15:16 → PDX 16:32AS 3202 · flown by SkyWest	1h 08m Portland	PDX 17:40 → SAN 20:18AS 369	5h 02m	22%	12%

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 · 1h 11m · leaves 05:07 0%

PDX · 1h 00m · leaves 08:31 2%

PHX · 1h 16m · leaves 06:30 6%

Afternoon and evening

SMF · 1h 00m · leaves 17:30 38%

PDX · 1h 08m · leaves 15:16 78%

SFO · 1h 13m · leaves 19:07 88%

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 4444 GEG 09:50 → SLC Alaska AS 3123 SLC 14:39 → SAN Connection details →	1h 58m	5h 56m	100%	83%
Alaska AS 2065 GEG 05:07 → SEA Delta DL 2533 SEA 09:45 → SAN Connection details →	3h 30m	7h 31m	100%	82%
Alaska AS 3349 GEG 11:51 → LAX Delta DL 4087 LAX 18:15 → SAN Connection details →	3h 29m	7h 25m	98%	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