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

Connect in the morning. The same one-hour layover misses 1 time in 10 at 10 am and 29% of the time at 5 pm.

Nonstops


Delta	PDX	SEA	1h 11m	89%	0.3%	2,651	Flying now
Alaska	PDX	SEA	1h 03m	83%	1.0%	3,908	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 →	PDX 17:24 → SLC 20:19DL 1244	2h 26m Salt Lake City	SLC 22:45 → SEA 23:59DL 2998	6h 35m	99%	90%
Delta Details →	PDX 05:45 → SLC 08:39DL 1270	2h 56m Salt Lake City	SLC 11:35 → SEA 12:52DL 2995	7h 07m	100%	88%
Alaska Details →	PDX 07:03 → GEG 08:13AS 2404 · flown by Horizon	3h 27m Spokane	GEG 11:40 → SEA 12:50AS 2262 · flown by Horizon	5h 47m	100%	88%
Alaska Details →	PDX 07:00 → BOI 09:19AS 2161 · flown by Horizon	3h 47m Boise	BOI 13:06 → SEA 13:40AS 2235 · flown by Horizon	6h 40m	100%	85%
Alaska Details →	PDX 10:38 → SNA 13:15AS 588	1h 30m Santa Ana	SNA 14:45 → SEA 17:32AS 760	6h 54m	98%	85%
Alaska Details →	PDX 07:15 → SJC 09:09AS 2080 · flown by Horizon	1h 10m San Jose	SJC 10:19 → SEA 12:30AS 1311	5h 15m	98%	84%
Alaska Details →	PDX 07:52 → SLC 10:45AS 2333 · flown by Horizon	2h 06m Salt Lake City	SLC 12:51 → SEA 14:04AS 664	6h 12m	95%	84%
Alaska Details →	PDX 07:36 → ONT 09:56AS 1449	2h 08m Ontario	ONT 12:04 → SEA 14:44AS 654	7h 08m	100%	84%
Tight connection: often missed
Alaska Details →	PDX 14:49 → SFO 16:40AS 236	58m San Francisco	SFO 17:38 → SEA 19:47AS 758	4h 58m	71%	51%
Alaska Details →	PDX 17:31 → BOI 19:48AS 2104 · flown by Horizon	59m Boise	BOI 20:47 → SEA 21:21AS 2352 · flown by Horizon	3h 50m	70%	41%
Alaska Details →	PDX 17:36 → SFO 19:30AS 504	58m San Francisco	SFO 20:28 → SEA 22:41AS 591	5h 05m	55%	39%

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

SJC · 1h 10m · leaves 07:15 2%

SAN · 1h 16m · leaves 07:32 6%

LAS · 57m · leaves 09:00 10%

Afternoon and evening

SMF · 57m · leaves 17:59 21%

BOI · 59m · leaves 17:31 30%

SFO · 58m · leaves 17:36 45%

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 3262 PDX 14:30 → GEG Delta DL 3857 GEG 17:37 → SEA Connection details →	1h 56m	4h 35m	100%	93%
Alaska AS 485 PDX 08:15 → SMF Delta DL 4125 SMF 13:00 → SEA Connection details →	3h 12m	7h 01m	100%	91%
Southwest WN 3211 PDX 05:30 → SMF Alaska AS 1468 SMF 10:23 → SEA Connection details →	3h 23m	6h 52m	100%	90%

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