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

Connect in the morning. The same one-hour layover misses 4% of the time at 9 am and 22% of the time at 3 pm.

Nonstops


Delta	SAN	SEA	3h 10m	88%	1.1%	1,704	Flying now
Alaska	SAN	SEA	3h 08m	79%	1.8%	2,740	Flying now
Southwest	SAN	SEA	3h 05m	60%	0.0%	149	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


Southwest Details →	SAN 18:00 → SMF 19:40WN 3549	2h 15m Sacramento	SMF 21:55 → SEA 23:50WN 4985	5h 50m	98%	92%
Delta Details →	SAN 06:15 → LAX 07:34DL 3743 · flown by SkyWest	2h 06m Los Angeles	LAX 09:40 → SEA 12:30DL 1714	6h 19m	99%	91%
Delta Details →	SAN 17:01 → SLC 20:00DL 1210	2h 45m Salt Lake City	SLC 22:45 → SEA 23:59DL 2998	6h 58m	99%	90%
Delta Details →	SAN 06:15 → SLC 09:22DL 1117	2h 13m Salt Lake City	SLC 11:35 → SEA 12:52DL 2995	6h 37m	99%	87%
American Details →	SAN 06:20 → PHX 07:54AA 625	3h 38m Phoenix	PHX 11:32 → SEA 14:49AA 3440 · flown by Envoy	8h 26m	99%	85%
Alaska Details →	SAN 08:44 → FAT 10:05AS 2208 · flown by Horizon	3h 22m Fresno	FAT 13:27 → SEA 15:43AS 384	6h 59m	98%	83%
Alaska Details →	SAN 06:50 → PDX 09:29AS 399	2h 34m Portland	PDX 12:03 → SEA 13:03AS 3078 · flown by SkyWest	6h 13m	99%	83%
United Details →	SAN 06:35 → DEN 10:08UA 2368	1h 14m Denver	DEN 11:22 → SEA 13:22UA 1424	6h 47m	98%	83%
Tight connection: often missed
Delta Details →	SAN 13:25 → SLC 16:32DL 1296	48m Salt Lake City	SLC 17:20 → SEA 18:36DL 871	5h 11m	73%	57%
American Details →	SAN 13:55 → DFW 19:15AA 2456	58m Dallas-Fort Worth	DFW 20:13 → SEA 22:26AA 2003	8h 31m	72%	37%
American Details →	SAN 16:32 → DFW 21:49AA 2485	52m Dallas-Fort Worth	DFW 22:41 → SEA 00:57 +1AA 1487	8h 25m	37%	15%

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

DEN · 1h 14m · leaves 06:35 2%

PDX · 1h 06m · leaves 06:50 4%

SJC · 53m · leaves 07:48 13%

Afternoon and evening

SFO · 47m · leaves 18:27 56%

DFW · 52m · leaves 16:32 63%

PHX · 48m · leaves 14:45 70%

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 3524 SAN 08:00 → PHX Delta DL 2419 PHX 12:05 → SEA Connection details →	2h 45m	7h 18m	100%	93%
Southwest WN 3536 SAN 06:35 → SJC Delta DL 3736 SJC 11:29 → SEA Connection details →	3h 14m	7h 24m	100%	92%
Southwest WN 4356 SAN 08:40 → SMF Delta DL 4125 SMF 13:00 → SEA Connection details →	2h 40m	6h 36m	98%	91%

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