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 4 in 5 on time.

Nonstops


United	EUG	DEN	2h 37m	84%	0.5%	813	Flying now
Southwest	EUG	DEN	2h 30m	74%	0.2%	454	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

Ranked by chance you reach Denver on time. Total trip = scheduled departure to arrival, layover included (Denver is 1 h ahead of Eugene). Layovers up to 4 hours. Pick a connection for the details.


Alaska Details →	EUG 05:20 → PDX 06:06AS 2053 · flown by Horizon	1h 14m Portland	PDX 07:20 → DEN 11:03AS 401	4h 43m	98%	96%
Alaska Details →	EUG 14:37 → SAN 17:08AS 3056 · flown by SkyWest	2h 53m San Diego	SAN 20:01 → DEN 23:30AS 1619	7h 53m	98%	94%
Southwest Details →	EUG 05:10 → SMF 06:30WN 1840	3h 45m Sacramento	SMF 10:15 → DEN 13:35WN 3774	7h 25m	97%	93%
United Details →	EUG 13:59 → SFO 15:35UA 2077	3h 21m San Francisco	SFO 18:56 → DEN 22:44UA 2436	7h 45m	97%	86%
Delta Details →	EUG 06:00 → SLC 08:53DL 3708 · flown by SkyWest	1h 22m Salt Lake City	SLC 10:15 → DEN 11:53DL 1553	4h 53m	97%	81%
United Details →	EUG 06:00 → SFO 07:35UA 335	56m San Francisco	SFO 08:31 → DEN 12:22UA 2348	5h 22m	93%	78%
Delta Details →	EUG 06:13 → SEA 07:40DL 4128 · flown by SkyWest	50m Seattle	SEA 08:30 → DEN 12:18DL 1358	5h 05m	92%	78%
Delta Details →	EUG 16:43 → SLC 19:41DL 4105 · flown by SkyWest	1h 24m Salt Lake City	SLC 21:05 → DEN 22:40DL 1667	4h 57m	97%	77%
Tight connection: often missed
United Details →	EUG 12:50 → ORD 19:00UA 1357	1h 00m Chicago	ORD 20:00 → DEN 22:01UA 767	8h 11m	70%	47%
Alaska Details →	EUG 09:45 → SEA 10:53AS 2073 · flown by Horizon	51m Seattle	SEA 11:44 → DEN 15:38AS 535	4h 53m	43%	34%

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 14m · leaves 05:20 2%

SFO · 56m · leaves 06:00 7%

SEA · 50m · leaves 06:13 8%

Afternoon and evening

PDX · 1h 13m · leaves 16:00 7%

SEA · 51m · leaves 17:45 13%

ORD · 1h 12m · leaves 12:38 25%

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 2053 EUG 05:20 → PDX United UA 2375 PDX 08:50 → DEN Connection details →	2h 44m	6h 04m	98%	95%
Southwest WN 1840 EUG 05:10 → SMF United UA 2285 SMF 08:50 → DEN Connection details →	2h 20m	6h 06m	94%	91%
Alaska AS 2323 EUG 12:55 → LAX United UA 2610 LAX 18:45 → DEN Connection details →	3h 34m	8h 20m	98%	89%

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