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 8 am and 1 time in 3 at 4 pm.

Nonstops


United	SEA	LAX	2h 52m	92%	0.5%	941	Flying now
Delta	SEA	LAX	2h 45m	84%	0.6%	2,226	Flying now
Alaska	SEA	LAX	2h 48m	82%	0.9%	3,306	Flying now
Frontier	SEA	LAX	2h 58m	81%	3.1%	295	Flying now
American	SEA	LAX	2h 58m	80%	0.6%	698	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


Alaska Details →	SEA 12:55 → BOI 15:26AS 441	3h 25m Boise	BOI 18:51 → LAX 20:10AS 2180 · flown by Horizon	7h 15m	98%	98%
Alaska Details →	SEA 07:20 → GEG 08:26AS 2135 · flown by Horizon	3h 25m Spokane	GEG 11:51 → LAX 14:46AS 3349 · flown by SkyWest	7h 26m	99%	92%
Delta Details →	SEA 14:45 → SJC 17:04DL 3897 · flown by SkyWest	3h 15m San Jose	SJC 20:19 → LAX 21:55DL 3883 · flown by SkyWest	7h 10m	100%	92%
Delta Details →	SEA 11:45 → SJC 14:11DL 3789 · flown by SkyWest	2h 19m San Jose	SJC 16:30 → LAX 17:56DL 3822 · flown by SkyWest	6h 11m	97%	91%
Delta Details →	SEA 08:47 → SMF 10:50DL 3881 · flown by SkyWest	3h 25m Sacramento	SMF 14:15 → LAX 15:52DL 3812 · flown by SkyWest	7h 05m	99%	91%
Delta Details →	SEA 09:30 → PDX 10:39DL 3818 · flown by SkyWest	2h 46m Portland	PDX 13:25 → LAX 15:51DL 2766	6h 21m	100%	90%
United Details →	SEA 05:00 → DEN 08:43UA 2601	1h 19m Denver	DEN 10:02 → LAX 11:34UA 405	6h 34m	99%	90%
Delta Details →	SEA 17:00 → SMF 19:01DL 4043 · flown by SkyWest	2h 04m Sacramento	SMF 21:05 → LAX 22:51DL 3759 · flown by SkyWest	5h 51m	98%	88%
Tight connection: often missed
Delta Details →	SEA 11:45 → SJC 14:11DL 3789 · flown by SkyWest	48m San Jose	SJC 14:59 → LAX 16:27DL 3842 · flown by SkyWest	4h 42m	72%	66%
United Details →	SEA 08:45 → SFO 11:03UA 2831	1h 12m San Francisco	SFO 12:15 → LAX 13:55UA 1506	5h 10m	47%	32%
Alaska Details →	SEA 07:03 → SFO 09:20AS 725	55m San Francisco	SFO 10:15 → LAX 11:44AS 1602	4h 41m	47%	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

DEN · 1h 19m · leaves 05:00 1%

PHX · 1h 18m · leaves 06:16 3%

SLC · 1h 07m · leaves 07:15 4%

Afternoon and evening

BOI · 48m · leaves 12:30 18%

DFW · 1h 07m · leaves 15:21 22%

SFO · 55m · leaves 18:36 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.


Southwest WN 3629 SEA 05:00 → SMF United UA 5220 SMF 10:13 → LAX Connection details →	3h 23m	7h 05m	100%	100%
Delta DL 3959 SEA 12:30 → BOI Alaska AS 2180 BOI 18:51 → LAX Connection details →	3h 39m	7h 40m	98%	98%
Alaska AS 681 SEA 14:16 → SMF United UA 5628 SMF 18:47 → LAX Connection details →	2h 36m	6h 23m	98%	96%

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