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 87% on time.

Nonstops


Delta	EUG	SEA	1h 26m	92%	0.8%	1,059	Flying now
Alaska	EUG	SEA	1h 15m	84%	1.3%	1,566	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.


Alaska Details →	EUG 05:20 → PDX 06:06AS 2053 · flown by Horizon	1h 13m Portland	PDX 07:19 → SEA 08:20AS 2420 · flown by Horizon	3h 00m	98%	94%
Delta Details →	EUG 06:00 → SLC 08:53DL 3708 · flown by SkyWest	2h 42m Salt Lake City	SLC 11:35 → SEA 12:52DL 2995	6h 52m	99%	87%
Alaska Details →	EUG 12:34 → PDX 13:26AS 3062 · flown by SkyWest	2h 04m Portland	PDX 15:30 → SEA 16:30AS 3408 · flown by SkyWest	3h 56m	93%	74%
United Details →	EUG 13:59 → SFO 15:35UA 2077	2h 53m San Francisco	SFO 18:28 → SEA 20:53UA 1577	6h 54m	95%	66%
Alaska Details →	EUG 14:37 → SAN 17:08AS 3056 · flown by SkyWest	1h 27m San Diego	SAN 18:35 → SEA 21:35AS 1431	6h 58m	83%	60%
Alaska Details →	EUG 12:55 → LAX 15:11AS 2323 · flown by Horizon	1h 14m Los Angeles	LAX 16:25 → SEA 19:11AS 1375	6h 16m	88%	59%
United Details →	EUG 18:49 → SFO 20:35UA 4662 · flown by SkyWest	2h 24m San Francisco	SFO 22:59 → SEA 01:29 +1UA 5579 · flown by SkyWest	6h 40m	83%	58%
Southwest Details →	EUG 18:40 → SJC 20:15WN 1839	1h 20m San Jose	SJC 21:35 → SEA 21:30WN 3705	5h 05m	88%	56%
Tight connection: often missed
United Details →	EUG 13:59 → SFO 15:35UA 2077	52m San Francisco	SFO 16:27 → SEA 18:47UA 2279	4h 48m	47%	36%

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

PDX · 1h 13m · leaves 05:20 2%

SAN · 57m · leaves 07:50 23%

Afternoon and evening

SJC · 1h 20m · leaves 18:40 12%

LAX · 1h 14m · leaves 12:55 12%

SFO · 52m · leaves 13:59 53%

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.


Delta DL 3708 EUG 06:00 → SLC Alaska AS 796 SLC 11:17 → SEA Connection details →	2h 24m	6h 30m	97%	83%
Alaska AS 2053 EUG 05:20 → PDX Delta DL 3953 PDX 09:30 → SEA Connection details →	3h 24m	5h 35m	98%	82%
Alaska AS 3062 EUG 12:34 → PDX Delta DL 4062 PDX 15:26 → SEA Connection details →	2h 00m	4h 07m	91%	81%

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