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 85% on time.

Nonstops


Delta	SEA	RDM	1h 23m	90%	1.7%	1,059	Flying now
Alaska	SEA	RDM	1h 10m	82%	1.7%	1,696	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

Ranked by chance you reach Redmond on time. Total trip = scheduled departure to arrival, layover included. Layovers up to 4 hours. Pick a connection for the details.


Alaska Details →	SEA 10:14 → PDX 11:21AS 3090 · flown by SkyWest	3h 09m Portland	PDX 14:30 → RDM 15:20AS 2173 · flown by Horizon	5h 06m	100%	94%
Alaska Details →	SEA 06:42 → PDX 07:37AS 2432 · flown by Horizon	3h 08m Portland	PDX 10:45 → RDM 11:47AS 3073 · flown by SkyWest	5h 05m	100%	94%
Delta Details →	SEA 05:30 → SLC 08:30DL 1128	2h 15m Salt Lake City	SLC 10:45 → RDM 11:44DL 3727 · flown by SkyWest	6h 14m	98%	90%
United Details →	SEA 05:15 → SFO 07:35UA 5676 · flown by SkyWest	2h 53m San Francisco	SFO 10:28 → RDM 12:12UA 2153	6h 57m	99%	90%
Alaska Details →	SEA 17:59 → PDX 18:56AS 2302 · flown by Horizon	2h 59m Portland	PDX 21:55 → RDM 22:45AS 2057 · flown by Horizon	4h 46m	98%	88%
Delta Details →	SEA 17:59 → SLC 21:09DL 1165	1h 56m Salt Lake City	SLC 23:05 → RDM 23:58DL 3756 · flown by SkyWest	5h 57m	94%	87%
United Details →	SEA 17:04 → LAX 19:53UA 1730	1h 27m Los Angeles	LAX 21:20 → RDM 23:35UA 5662 · flown by SkyWest	6h 31m	94%	84%
Alaska Details →	SEA 13:45 → PDX 14:48AS 3204 · flown by SkyWest	3h 32m Portland	PDX 18:20 → RDM 19:09AS 2172 · flown by Horizon	5h 24m	99%	81%
Tight connection: often missed
United Details →	SEA 13:30 → SFO 15:48UA 737	1h 17m San Francisco	SFO 17:05 → RDM 18:56UA 5425 · flown by SkyWest	5h 26m	71%	54%
United Details →	SEA 07:00 → SFO 09:18UA 1578	1h 10m San Francisco	SFO 10:28 → RDM 12:12UA 2153	5h 12m	29%	26%

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

PHX · 1h 10m · leaves 06:16 3%

SAN · 55m · leaves 06:21 16%

PDX · 56m · leaves 08:45 16%

Afternoon and evening

LAX · 57m · leaves 17:10 24%

SFO · 1h 17m · leaves 13:30 29%

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 3818 SEA 09:30 → PDX Alaska AS 2173 PDX 14:30 → RDM Connection details →	3h 51m	5h 50m	100%	95%
Delta DL 3953 SEA 07:30 → PDX Alaska AS 3073 PDX 10:45 → RDM Connection details →	2h 06m	4h 17m	97%	92%
Delta DL 4062 SEA 13:35 → PDX Alaska AS 2172 PDX 18:20 → RDM Connection details →	3h 34m	5h 34m	99%	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