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 3 in 4 on time.

Nonstops


United	DEN	EUG	2h 52m	76%	0.1%	813	Flying now
Southwest	DEN	EUG	2h 45m	73%	0.4%	455	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


Delta Details →	DEN 05:40 → SLC 07:13DL 2544	3h 32m Salt Lake City	SLC 10:45 → EUG 11:52DL 4135 · flown by SkyWest	7h 12m	97%	90%
Delta Details →	DEN 19:00 → SLC 20:38DL 2663	2h 17m Salt Lake City	SLC 22:55 → EUG 23:55DL 3721 · flown by SkyWest	5h 55m	95%	90%
Alaska Details →	DEN 08:00 → PDX 09:46AS 1626	1h 13m Portland	PDX 10:59 → EUG 11:57AS 3063 · flown by SkyWest	4h 57m	96%	85%
Alaska Details →	DEN 18:15 → SEA 20:17AS 249	2h 32m Seattle	SEA 22:49 → EUG 23:59AS 2047 · flown by Horizon	6h 44m	94%	85%
Delta Details →	DEN 06:30 → SEA 08:31DL 1731	2h 59m Seattle	SEA 11:30 → EUG 12:59DL 4149 · flown by SkyWest	7h 29m	98%	85%
American Details →	DEN 07:13 → PHX 08:08AA 1404	2h 13m Phoenix	PHX 10:21 → EUG 13:06AA 4114 · flown by Envoy	6h 53m	94%	84%
Alaska Details →	DEN 06:02 → SEA 08:05AS 643	3h 32m Seattle	SEA 11:37 → EUG 13:01AS 3360 · flown by SkyWest	7h 59m	99%	82%
United Details →	DEN 05:15 → SFO 06:53UA 2367	3h 32m San Francisco	SFO 10:25 → EUG 12:01UA 790	7h 46m	99%	80%
Tight connection: often missed
Alaska Details →	DEN 12:55 → SEA 14:53AS 381	57m Seattle	SEA 15:50 → EUG 17:00AS 2338 · flown by Horizon	5h 05m	73%	50%
Alaska Details →	DEN 19:05 → PDX 20:50AS 1807	50m Portland	PDX 21:40 → EUG 22:28AS 2088 · flown by Horizon	4h 23m	46%	36%
American Details →	DEN 18:56 → PHX 19:52AA 1638	48m Phoenix	PHX 20:40 → EUG 23:21AA 4028 · flown by Envoy	5h 21m	37%	31%

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 08:00 4%

SEA · 55m · leaves 08:40 20%

SFO · 1h 07m · leaves 07:40 22%

Afternoon and evening

SFO · 1h 01m · leaves 13:25 23%

PDX · 50m · leaves 19:05 54%

PHX · 48m · leaves 18:56 63%

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 1571 DEN 14:50 → LAX Alaska AS 3323 LAX 19:20 → EUG Connection details →	3h 00m	7h 48m	96%	92%
United UA 1093 DEN 06:04 → LAX Alaska AS 2324 LAX 10:05 → EUG Connection details →	2h 31m	7h 14m	99%	92%
Frontier F9 3219 DEN 06:00 → SLC Delta DL 4135 SLC 10:45 → EUG Connection details →	3h 14m	6h 52m	98%	91%

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