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

The nonstop is quickest: Alaska PDX → IDA (1h 47m), on time 4 times in 5. Delta via Salt Lake City (3h 58m) is more reliable, 91%, but takes 2h 11m longer.

Nonstops (seasonal or thin)


Alaska	PDX	IDA	1h 47m	80%	0.0%	80	Flying now
Allegiant	PDX	IDA	1h 40m	77%few flights	0.0%	39	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


Delta Details →	PDX 05:45 → SLC 08:39DL 1270	56m Salt Lake City	SLC 09:35 → IDA 10:43DL 3944 · flown by SkyWest	3h 58m	97%	91%
United Details →	PDX 08:50 → DEN 12:24UA 2375	3h 11m Denver	DEN 15:35 → IDA 17:19UA 5322 · flown by SkyWest	7h 29m	99%	82%
Delta Details →	PDX 09:45 → SLC 12:35DL 1203	55m Salt Lake City	SLC 13:30 → IDA 14:37DL 3765 · flown by SkyWest	3h 52m	88%	80%
Alaska Details →	PDX 15:30 → SEA 16:30AS 3408 · flown by SkyWest	3h 20m Seattle	SEA 19:50 → IDA 22:39AS 3423 · flown by SkyWest	6h 09m	99%	76%
Delta Details →	PDX 13:15 → SLC 16:12DL 1209	58m Salt Lake City	SLC 17:10 → IDA 18:18DL 3895 · flown by SkyWest	4h 02m	87%	76%
United Details →	PDX 05:00 → DEN 08:31UA 459	3h 14m Denver	DEN 11:45 → IDA 13:25UA 2383	7h 25m	99%	71%
Delta Details →	PDX 17:24 → SLC 20:19DL 1244	1h 11m Salt Lake City	SLC 21:30 → IDA 22:31DL 2608	4h 07m	91%	71%
Alaska Details →	PDX 08:19 → SEA 09:14AS 2108 · flown by Horizon	3h 31m Seattle	SEA 12:45 → IDA 15:37AS 3490 · flown by SkyWest	6h 18m	98%	70%

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

SLC · 56m · leaves 05:45 3%

SEA · 1h 02m · leaves 10:35 17%

Afternoon and evening

SLC · 58m · leaves 13:15 13%

SEA · 1h 17m · leaves 17:30 17%

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 2333 PDX 07:52 → SLC Delta DL 3765 SLC 13:30 → IDA Connection details →	2h 45m	5h 45m	95%	89%
Alaska AS 3112 PDX 10:55 → SLC Delta DL 3895 SLC 17:10 → IDA Connection details →	3h 11m	6h 22m	98%	87%
Southwest WN 3693 PDX 08:35 → DEN United UA 5322 DEN 15:35 → IDA Connection details →	3h 35m	7h 44m	100%	83%

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