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 84% on time.

Nonstops


Delta	SEA	PSC	1h 13m	86%	0.3%	1,113	Flying now
Alaska	SEA	PSC	1h 03m	83%	1.8%	1,576	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


United Details →	SEA 05:15 → SFO 07:35UA 5676 · flown by SkyWest	1h 40m San Francisco	SFO 09:15 → PSC 11:27UA 4717 · flown by SkyWest	6h 12m	96%	96%
Delta Details →	SEA 09:30 → SLC 12:38DL 1016	3h 13m Salt Lake City	SLC 15:51 → PSC 16:41DL 3728 · flown by SkyWest	7h 11m	99%	86%
Delta Details →	SEA 07:15 → SLC 10:23DL 2858	2h 00m Salt Lake City	SLC 12:23 → PSC 13:09DL 3892 · flown by SkyWest	5h 56m	96%	85%
Alaska Details →	SEA 17:59 → PDX 18:56AS 2302 · flown by Horizon	2h 54m Portland	PDX 21:50 → PSC 22:44AS 3066 · flown by SkyWest	4h 45m	98%	83%
Alaska Details →	SEA 10:14 → PDX 11:21AS 3090 · flown by SkyWest	3h 10m Portland	PDX 14:31 → PSC 15:22AS 2475 · flown by Horizon	5h 08m	100%	81%
Delta Details →	SEA 17:59 → SLC 21:09DL 1165	2h 06m Salt Lake City	SLC 23:15 → PSC 23:54DL 1712	5h 59m	95%	80%
Alaska Details →	SEA 15:59 → LAX 18:44AS 1300	1h 01m Los Angeles	LAX 19:45 → PSC 22:17AS 3303 · flown by SkyWest	6h 18m	78%	66%
Tight connection: often missed
United Details →	SEA 14:33 → DEN 18:22UA 333	1h 02m Denver	DEN 19:24 → PSC 20:52UA 1913	6h 19m	69%	45%
United Details →	SEA 19:05 → SFO 21:21UA 2241	1h 19m San Francisco	SFO 22:40 → PSC 00:50 +1UA 6044 · flown by SkyWest	5h 45m	38%	17%

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.

Afternoon and evening

LAX · 1h 01m · leaves 15:59 22%

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.


Alaska AS 373 SEA 16:47 → SLC Delta DL 1712 SLC 23:15 → PSC Connection details →	3h 25m	7h 11m	98%	83%
Delta DL 3818 SEA 09:30 → PDX Alaska AS 2475 PDX 14:31 → PSC Connection details →	3h 52m	5h 52m	100%	82%
Alaska AS 292 SEA 07:18 → SLC Delta DL 3892 SLC 12:23 → PSC Connection details →	1h 56m	5h 53m	89%	79%

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