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 64% on time.

Nonstops (seasonal or thin)


Alaska	IDA	PDX	1h 47m	66%	0.0%	80	Flying now
Allegiant	IDA	PDX	1h 39m	59%few flights	0.0%	39	Flying now

Best connections, any airlines

Most reliable Quickest (80%+ on time)

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


Alaska Details →	IDA 07:15 → SEA 08:21AS 3054 · flown by SkyWest	1h 53m Seattle	SEA 10:14 → PDX 11:21AS 3090 · flown by SkyWest	5h 06m	98%	94%
Delta Details →	IDA 19:00 → SLC 20:09DL 3895 · flown by SkyWest	2h 41m Salt Lake City	SLC 22:50 → PDX 23:44DL 1373	5h 45m	98%	87%
Delta Details →	IDA 11:25 → SLC 12:31DL 3944 · flown by SkyWest	2h 53m Salt Lake City	SLC 15:24 → PDX 16:19DL 1244	5h 54m	99%	87%
United + Alaskatwo ticketsDetails →	IDA 07:00 → DEN 08:55UA 4706 · flown by SkyWest	3h 07m Denver	DEN 12:02 → PDX 13:46AS 684	7h 46m	96%	85%
United + Frontiertwo ticketsDetails →	IDA 10:35 → DEN 12:28UA 5793 · flown by SkyWest	2h 40m Denver	DEN 15:08 → PDX 16:51F9 2553	7h 18m	94%	81%
Delta + Alaskatwo ticketsDetails →	IDA 15:22 → SLC 16:30DL 3765 · flown by SkyWest	3h 09m Salt Lake City	SLC 19:39 → PDX 20:43AS 3280 · flown by SkyWest	6h 21m	98%	79%
Alaska Details →	IDA 13:43 → SEA 14:48AS 3489 · flown by SkyWest	3h 11m Seattle	SEA 17:59 → PDX 18:56AS 2302 · flown by Horizon	6h 13m	100%	75%
United Details →	IDA 14:30 → DEN 16:18UA 2155	3h 12m Denver	DEN 19:30 → PDX 21:15UA 498	7h 45m	91%	73%

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.

Afternoon and evening

SLC · 55m · leaves 15:22 9%

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