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 86% on time.

Nonstops


Alaska	SNA	SEA	2h 53m	88%	1.0%	2,578	Flying now
Delta	SNA	SEA	3h 04m	82%	1.0%	1,378	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 →	SNA 18:45 → SMF 20:10WN 3872	1h 45m Sacramento	SMF 21:55 → SEA 23:50WN 4985	5h 05m	95%	89%
Delta Details →	SNA 17:03 → SLC 19:59DL 1277	2h 46m Salt Lake City	SLC 22:45 → SEA 23:59DL 2998	6h 56m	98%	88%
Alaska Details →	SNA 18:09 → PDX 20:31AS 589	59m Portland	PDX 21:30 → SEA 22:27AS 2421 · flown by Horizon	4h 18m	95%	85%
American Details →	SNA 06:46 → PHX 08:19AA 628	3h 13m Phoenix	PHX 11:32 → SEA 14:49AA 3440 · flown by Envoy	8h 00m	98%	84%
Alaska Details →	SNA 07:00 → PDX 09:24AS 750	2h 39m Portland	PDX 12:03 → SEA 13:03AS 3078 · flown by SkyWest	6h 03m	100%	84%
American Details →	SNA 13:24 → PHX 14:50AA 3171	3h 05m Phoenix	PHX 17:55 → SEA 21:05AA 4307 · flown by Envoy	7h 41m	99%	83%
Delta Details →	SNA 10:45 → LAS 12:02DL 4078 · flown by SkyWest	1h 33m Las Vegas	LAS 13:35 → SEA 16:23DL 2905	5h 38m	93%	83%
United Details →	SNA 06:45 → DEN 10:16UA 513	1h 06m Denver	DEN 11:22 → SEA 13:22UA 1424	6h 37m	97%	82%
Tight connection: often missed
Alaska Details →	SNA 18:03 → SFO 19:33AS 3248 · flown by SkyWest	55m San Francisco	SFO 20:28 → SEA 22:41AS 591	4h 38m	60%	42%
Alaska Details →	SNA 12:33 → BOI 15:39AS 1606	48m Boise	BOI 16:27 → SEA 17:06AS 740	4h 33m	73%	40%
United Details →	SNA 18:20 → SFO 19:51UA 2657	1h 03m San Francisco	SFO 20:54 → SEA 23:19UA 1007	4h 59m	45%	29%

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 · 1h 11m · leaves 07:00 2%

DEN · 1h 06m · leaves 06:45 3%

SLC · 1h 20m · leaves 07:15 7%

Afternoon and evening

BOI · 48m · leaves 12:33 27%

DFW · 52m · leaves 16:34 41%

SFO · 1h 03m · leaves 18:20 55%

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 3290 SNA 08:35 → PHX Delta DL 2419 PHX 12:05 → SEA Connection details →	2h 15m	6h 43m	100%	93%
Southwest WN 3868 SNA 08:50 → SMF Delta DL 4125 SMF 13:00 → SEA Connection details →	2h 45m	6h 26m	100%	93%
Alaska AS 2020 SNA 11:25 → GEG Delta DL 3857 GEG 17:37 → SEA Connection details →	3h 38m	7h 40m	100%	93%

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