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

No clear winner: United’s RDM → DEN flights land within a few points of 86% on time whatever the hour.

Nonstops (seasonal or thin)


United	RDM	DEN	2h 28m	86%	0.8%	727	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 Redmond). Layovers up to 4 hours. Pick a connection for the details.


Alaska Details →	RDM 05:25 → PDX 06:15AS 2043 · flown by Horizon	1h 05m Portland	PDX 07:20 → DEN 11:03AS 401	4h 38m	96%	93%
United Details →	RDM 07:00 → LAX 09:23UA 5482 · flown by SkyWest	3h 23m Los Angeles	LAX 12:46 → DEN 16:16UA 360	8h 16m	99%	88%
United Details →	RDM 13:49 → SFO 15:32UA 2262	3h 24m San Francisco	SFO 18:56 → DEN 22:44UA 2436	7h 55m	97%	86%
United Details →	RDM 15:51 → SFO 17:39UA 4739 · flown by SkyWest	3h 21m San Francisco	SFO 21:00 → DEN 00:47 +1UA 301	7h 56m	94%	80%
Delta Details →	RDM 05:20 → SLC 08:07DL 4004 · flown by SkyWest	2h 08m Salt Lake City	SLC 10:15 → DEN 11:53DL 1553	5h 33m	94%	77%
United Details →	RDM 05:55 → SFO 07:33UA 702	58m San Francisco	SFO 08:31 → DEN 12:22UA 2348	5h 27m	93%	77%
Alaska Details →	RDM 07:15 → SEA 08:28AS 2027 · flown by Horizon	3h 16m Seattle	SEA 11:44 → DEN 15:38AS 535	7h 23m	98%	74%
Delta Details →	RDM 12:24 → SLC 15:12DL 3727 · flown by SkyWest	3h 18m Salt Lake City	SLC 18:30 → DEN 20:02DL 1586	6h 40m	99%	69%
Tight connection: often missed
Alaska Details →	RDM 06:00 → SEA 07:14AS 3026 · flown by SkyWest	50m Seattle	SEA 08:04 → DEN 11:56AS 375	4h 56m	55%	48%
Alaska Details →	RDM 09:44 → SEA 10:57AS 2076 · flown by Horizon	47m Seattle	SEA 11:44 → DEN 15:38AS 535	4h 54m	42%	32%

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 05m · leaves 05:25 4%

SFO · 58m · leaves 05:55 7%

SEA · 50m · leaves 06:00 45%

Afternoon and evening

PDX · 1h 14m · leaves 16:00 4%

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 2043 RDM 05:25 → PDX United UA 2375 PDX 08:50 → DEN Connection details →	2h 35m	5h 59m	99%	95%
Alaska AS 2075 RDM 07:00 → LAX United UA 360 LAX 12:46 → DEN Connection details →	3h 26m	8h 16m	100%	88%
Alaska AS 2167 RDM 16:00 → PDX United UA 2334 PDX 18:50 → DEN Connection details →	2h 00m	5h 29m	96%	86%

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