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

No clear winner: Alaska’s PSC → PDX flights land within a few points of 88% on time whatever the hour.

Nonstops (seasonal or thin)


Alaska	PSC	PDX	55m	88%	1.0%	104	Flying now

Best connections, any airlines

Most reliable Quickest (80%+ on time)

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


Alaska Details →	PSC 06:15 → SEA 07:20AS 2165 · flown by Horizon	2h 54m Seattle	SEA 10:14 → PDX 11:21AS 3090 · flown by SkyWest	5h 06m	100%	94%
Delta Details →	PSC 17:21 → SLC 20:10DL 3728 · flown by SkyWest	2h 40m Salt Lake City	SLC 22:50 → PDX 23:44DL 1373	6h 24m	100%	89%
Delta + Alaskatwo ticketsDetails →	PSC 06:00 → SLC 08:38DL 1645	2h 44m Salt Lake City	SLC 11:22 → PDX 12:23AS 2333 · flown by Horizon	6h 23m	97%	88%
Delta Details →	PSC 05:25 → SEA 06:39DL 3972 · flown by SkyWest	2h 51m Seattle	SEA 09:30 → PDX 10:39DL 3818 · flown by SkyWest	5h 14m	96%	87%
Alaska Details →	PSC 10:33 → SEA 11:38AS 2171 · flown by Horizon	2h 07m Seattle	SEA 13:45 → PDX 14:48AS 3204 · flown by SkyWest	4h 15m	99%	87%
Delta Details →	PSC 10:00 → SLC 12:47DL 3694 · flown by SkyWest	2h 37m Salt Lake City	SLC 15:24 → PDX 16:19DL 1244	6h 19m	99%	86%
Delta + Alaskatwo ticketsDetails →	PSC 15:25 → SEA 16:40DL 3891 · flown by SkyWest	3h 45m Seattle	SEA 20:25 → PDX 21:22AS 2387 · flown by Horizon	5h 57m	100%	83%
Delta Details →	PSC 12:30 → SEA 13:50DL 3992 · flown by SkyWest	2h 11m Seattle	SEA 16:01 → PDX 17:09DL 3918 · flown by SkyWest	4h 39m	97%	82%
Tight connection: often missed
United Details →	PSC 07:00 → SFO 09:06UA 6046 · flown by SkyWest	1h 09m San Francisco	SFO 10:15 → PDX 12:08UA 1301	5h 08m	20%	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

SEA · 51m · leaves 05:25 10%

SFO · 1h 09m · leaves 07:00 80%

Afternoon and evening

SEA · 1h 15m · leaves 18:04 8%

SLC · 51m · leaves 13:50 9%

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.

The table above includes two-ticket connections (marked “two tickets”), held to the 90-minute minimum. One ticket only →

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