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	PDX	1h 03m	87%	0.3%	2,650	Flying now
Alaska	SEA	PDX	59m	82%	0.8%	3,907	Flying now

Best connections, one ticket

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 →	SEA 07:28 → SMF 09:26AS 682	2h 20m Sacramento	SMF 11:46 → PDX 13:18AS 621	5h 50m	100%	98%
Alaska Details →	SEA 07:12 → OAK 09:26AS 533	2h 35m Oakland	OAK 12:01 → PDX 13:44AS 3045 · flown by SkyWest	6h 32m	96%	94%
Alaska Details →	SEA 11:41 → OAK 13:59AS 1328	3h 36m Oakland	OAK 17:35 → PDX 19:12AS 2304 · flown by Horizon	7h 31m	100%	94%
Alaska Details →	SEA 11:56 → RDM 13:08AS 2400 · flown by Horizon	2h 52m Redmond	RDM 16:00 → PDX 16:50AS 2167 · flown by Horizon	4h 54m	100%	94%
Alaska Details →	SEA 07:07 → BOI 09:40AS 248	3h 49m Boise	BOI 13:29 → PDX 13:47AS 2209 · flown by Horizon	6h 40m	100%	94%
Alaska Details →	SEA 07:55 → RDM 09:04AS 2079 · flown by Horizon	3h 30m Redmond	RDM 12:34 → PDX 13:35AS 3074 · flown by SkyWest	5h 40m	100%	93%
Alaska Details →	SEA 11:53 → RNO 13:50AS 273	3h 45m Reno	RNO 17:35 → PDX 19:09AS 2127 · flown by Horizon	7h 16m	99%	93%
Alaska Details →	SEA 08:23 → FCA 10:48AS 2183 · flown by Horizon	2h 22m Kalispell	FCA 13:10 → PDX 13:49AS 2283 · flown by Horizon	5h 26m	100%	92%
Tight connection: often missed
Alaska Details →	SEA 10:03 → SAN 13:01AS 467	1h 02m San Diego	SAN 14:03 → PDX 16:36AS 1402	6h 33m	68%	57%
Alaska Details →	SEA 11:55 → SMF 13:57AS 1428	58m Sacramento	SMF 14:55 → PDX 16:27AS 1600	4h 32m	67%	50%
Alaska Details →	SEA 11:42 → SFO 14:04AS 655	58m San Francisco	SFO 15:02 → PDX 16:47AS 1302	5h 05m	67%	50%

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

SLC · 52m · leaves 07:15 7%

RNO · 1h 04m · leaves 09:10 8%

LAX · 1h 03m · leaves 07:26 13%

Afternoon and evening

ONT · 1h 02m · leaves 13:50 42%

SFO · 1h 20m · leaves 18:36 57%

DEN · 1h 05m · leaves 14:35 76%

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 3630 SEA 07:35 → SMF Alaska AS 621 SMF 11:46 → PDX Connection details →	2h 11m	5h 43m	100%	98%
Southwest WN 266 SEA 06:15 → OAK Alaska AS 3045 OAK 12:01 → PDX Connection details →	3h 36m	7h 29m	100%	98%
Delta DL 3750 SEA 07:15 → BOI Alaska AS 2209 BOI 13:29 → PDX Connection details →	3h 33m	6h 32m	99%	92%

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