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


Alaska	PSP	SEA	2h 59m	88%	1.1%	1,515	Flying now
Delta	PSP	SEA	3h 02m	87%	2.2%	179	Not 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.


Delta Details →	PSP 17:10 → SLC 19:59DL 3852 · flown by SkyWest	2h 46m Salt Lake City	SLC 22:45 → SEA 23:59DL 2998	6h 49m	99%	90%
United Details →	PSP 07:26 → LAX 08:30UA 5542 · flown by SkyWest	3h 13m Los Angeles	LAX 11:43 → SEA 14:36UA 325	7h 10m	100%	89%
Delta Details →	PSP 06:09 → SLC 08:55DL 4030 · flown by SkyWest	2h 40m Salt Lake City	SLC 11:35 → SEA 12:52DL 2995	6h 43m	99%	88%
American Details →	PSP 06:32 → PHX 07:52AA 6406 · flown by SkyWest	3h 40m Phoenix	PHX 11:32 → SEA 14:49AA 3440 · flown by Envoy	8h 14m	97%	83%
American Details →	PSP 12:55 → PHX 14:09AA 2330	3h 46m Phoenix	PHX 17:55 → SEA 21:05AA 4307 · flown by Envoy	8h 10m	98%	83%
United Details →	PSP 05:30 → DEN 08:52UA 5411 · flown by SkyWest	2h 30m Denver	DEN 11:22 → SEA 13:22UA 1424	7h 52m	96%	82%
Alaska Details →	PSP 07:16 → PDX 09:48AS 3370 · flown by SkyWest	2h 15m Portland	PDX 12:03 → SEA 13:03AS 3078 · flown by SkyWest	5h 47m	96%	79%
Delta Details →	PSP 12:23 → SLC 15:11DL 4042 · flown by SkyWest	2h 09m Salt Lake City	SLC 17:20 → SEA 18:36DL 871	6h 13m	97%	78%
Tight connection: often missed
United Details →	PSP 11:09 → SFO 12:52UA 5660 · flown by SkyWest	1h 08m San Francisco	SFO 14:00 → SEA 16:20UA 1265	5h 11m	71%	41%

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

DFW · 1h 15m · leaves 06:01 5%

PDX · 47m · leaves 07:16 13%

Afternoon and evening

SMF · 50m · leaves 19:30 19%

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.


United UA 5542 PSP 07:26 → LAX Delta DL 1045 LAX 11:59 → SEA Connection details →	3h 29m	7h 28m	100%	88%
Delta DL 4030 PSP 06:09 → SLC Alaska AS 664 SLC 12:51 → SEA Connection details →	3h 56m	7h 55m	99%	88%
Southwest WN 2189 PSP 10:00 → LAS Delta DL 2905 LAS 13:35 → SEA Connection details →	2h 30m	6h 23m	98%	87%

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