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

No clear winner: Alaska’s PDX → BOI flights land within a few points of 9 in 10 on time whatever the hour.

Nonstops


Alaska	PDX	BOI	1h 19m	89%	0.7%	1,747	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

Ranked by chance you reach Boise on time. Total trip = scheduled departure to arrival, layover included (Boise 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	2h 21m Salt Lake City	SLC 11:00 → BOI 12:15DL 1442	5h 32m	100%	92%
Alaska Details →	PDX 08:15 → SMF 09:48AS 485	3h 22m Sacramento	SMF 13:10 → BOI 15:35AS 2157 · flown by Horizon	6h 20m	100%	90%
American Details →	PDX 05:20 → PHX 08:00AA 2658	2h 10m Phoenix	PHX 10:10 → BOI 13:27AA 4948 · flown by SkyWest	7h 07m	96%	89%
Delta Details →	PDX 07:20 → SEA 08:34DL 4471 · flown by SkyWest	3h 56m Seattle	SEA 12:30 → BOI 15:12DL 3959 · flown by SkyWest	6h 52m	100%	88%
Delta Details →	PDX 06:30 → LAX 09:00DL 2947	2h 44m Los Angeles	LAX 11:44 → BOI 14:46DL 3773 · flown by SkyWest	7h 21m	99%	88%
Delta Details →	PDX 05:30 → SEA 06:41DL 4008 · flown by SkyWest	1h 54m Seattle	SEA 08:35 → BOI 11:15DL 3678 · flown by SkyWest	4h 45m	97%	88%
Southwest Details →	PDX 05:00 → LAS 07:10WN 344	1h 25m Las Vegas	LAS 08:35 → BOI 11:25WN 2192	5h 25m	96%	88%
Delta Details →	PDX 11:20 → SEA 12:36DL 3818 · flown by SkyWest	2h 18m Seattle	SEA 14:54 → BOI 17:30DL 4127 · flown by SkyWest	5h 10m	99%	87%
Tight connection: often missed
Alaska Details →	PDX 13:48 → SEA 14:43AS 2205 · flown by Horizon	1h 02m Seattle	SEA 15:45 → BOI 18:11AS 2061 · flown by Horizon	3h 23m	75%	68%
Alaska Details →	PDX 14:46 → LAS 17:06AS 778	46m Las Vegas	LAS 17:52 → BOI 20:43AS 2182 · flown by Horizon	4h 57m	66%	45%
United Details →	PDX 11:16 → SFO 13:07UA 1613	47m San Francisco	SFO 13:54 → BOI 16:44UA 267	4h 28m	19%	12%

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

SEA · 1h 14m · leaves 05:00 4%

SFO · 1h 19m · leaves 07:00 59%

Afternoon and evening

SEA · 1h 10m · leaves 15:30 15%

LAS · 46m · leaves 14:46 34%

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 PDX 11:20 → SEA Alaska AS 2061 SEA 15:45 → BOI Connection details →	3h 09m	5h 51m	99%	90%
Alaska AS 2431 PDX 05:00 → SEA Delta DL 3678 SEA 08:35 → BOI Connection details →	2h 42m	5h 15m	99%	88%
Southwest WN 4666 PDX 05:20 → PHX American AA 4948 PHX 10:10 → BOI Connection details →	2h 15m	7h 07m	93%	87%

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