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

No clear winner: Delta’s RDM → SLC flights land within a few points of 9 in 10 on time whatever the hour.

Nonstops (seasonal or thin)


Delta	RDM	SLC	1h 47m	91%	0.8%	729	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

Ranked by chance you reach Salt Lake City on time. Total trip = scheduled departure to arrival, layover included (Salt Lake City 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 37m Portland	PDX 07:52 → SLC 10:45AS 2333 · flown by Horizon	4h 20m	98%	89%
United Details →	RDM 05:55 → SFO 07:33UA 702	1h 07m San Francisco	SFO 08:40 → SLC 11:49UA 5605 · flown by SkyWest	4h 54m	94%	88%
Alaska Details →	RDM 12:34 → PDX 13:35AS 3074 · flown by SkyWest	55m Portland	PDX 14:30 → SLC 17:29AS 3120 · flown by SkyWest	3h 55m	91%	87%
Alaska Details →	RDM 06:00 → SEA 07:14AS 3026 · flown by SkyWest	1h 34m Seattle	SEA 08:48 → SLC 11:55AS 360	4h 55m	98%	87%
Delta Details →	RDM 06:26 → SEA 07:55DL 4036 · flown by SkyWest	1h 35m Seattle	SEA 09:30 → SLC 12:38DL 1016	5h 12m	94%	83%
Delta Details →	RDM 13:25 → SEA 14:55DL 3735 · flown by SkyWest	3h 04m Seattle	SEA 17:59 → SLC 21:09DL 1165	6h 44m	98%	77%
United Details →	RDM 05:00 → DEN 08:28UA 1188	3h 12m Denver	DEN 11:40 → SLC 13:13UA 1963	7h 13m	98%	77%
Alaska Details →	RDM 13:48 → SEA 14:59AS 2400 · flown by Horizon	1h 48m Seattle	SEA 16:47 → SLC 19:50AS 373	5h 02m	90%	71%
Tight connection: often missed
Alaska Details →	RDM 09:44 → SEA 10:57AS 2076 · flown by Horizon	54m Seattle	SEA 11:51 → SLC 15:04AS 733	4h 20m	62%	42%

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

SFO · 1h 07m · leaves 05:55 6%

SEA · 54m · leaves 09:44 38%

Afternoon and evening

DEN · 1h 03m · leaves 13:14 13%

PDX · 50m · leaves 16:00 18%

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.


American AA 3773 RDM 05:30 → PHX Delta DL 1447 PHX 09:45 → SLC Connection details →	1h 48m	5h 53m	99%	92%
Alaska AS 3223 RDM 11:26 → BUR Delta DL 3693 BUR 16:54 → SLC Connection details →	3h 23m	7h 29m	98%	92%
Alaska AS 3026 RDM 06:00 → SEA Delta DL 1016 SEA 09:30 → SLC Connection details →	2h 16m	5h 38m	98%	88%

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