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, any airlines

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%
Alaska + Deltatwo ticketsDetails →	PDX 07:52 → SLC 10:45AS 2333 · flown by Horizon	2h 45m Salt Lake City	SLC 13:30 → IDA 14:37DL 3765 · flown by SkyWest	5h 45m	95%	89%
Alaska + Deltatwo ticketsDetails →	PDX 10:55 → SLC 13:59AS 3112 · flown by SkyWest	3h 11m Salt Lake City	SLC 17:10 → IDA 18:18DL 3895 · flown by SkyWest	6h 22m	98%	87%
Southwest + Unitedtwo ticketsDetails →	PDX 08:35 → DEN 12:00WN 3693	3h 35m Denver	DEN 15:35 → IDA 17:19UA 5322 · flown by SkyWest	7h 44m	100%	83%
Southwest + Unitedtwo ticketsDetails →	PDX 07:30 → DEN 11:00WN 4099	2h 50m Denver	DEN 13:50 → IDA 15:34UA 5950 · flown by SkyWest	7h 04m	100%	82%
Delta + Alaskatwo ticketsDetails →	PDX 15:26 → SEA 16:40DL 4062 · flown by SkyWest	3h 10m Seattle	SEA 19:50 → IDA 22:39AS 3423 · flown by SkyWest	6h 13m	98%	77%
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%

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.

The table above includes two-ticket connections (marked “two tickets”), held to the 90-minute minimum. One ticket only →

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