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 ONT → BOI (1h 59m), on time 82% of the time. Alaska via Portland (4h 49m) is more reliable, 96%, but takes 2h 50m longer.

Nonstops (seasonal or thin)


Alaska	ONT	BOI	1h 59m	83%	1.0%	206	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 Ontario). Layovers up to 4 hours. Pick a connection for the details.


Alaska Details →	ONT 07:00 → PDX 09:15AS 345	1h 15m Portland	PDX 10:30 → BOI 12:49AS 2089 · flown by Horizon	4h 49m	100%	96%
Southwest Details →	ONT 05:15 → PHX 06:30WN 864	2h 10m Phoenix	PHX 08:40 → BOI 11:45WN 4601	5h 30m	98%	92%
Southwest Details →	ONT 05:30 → LAS 06:35WN 3150	2h 00m Las Vegas	LAS 08:35 → BOI 11:25WN 2192	4h 55m	100%	91%
Delta Details →	ONT 06:00 → SLC 08:50DL 2708	2h 10m Salt Lake City	SLC 11:00 → BOI 12:15DL 1442	5h 17m	98%	90%
American Details →	ONT 06:11 → PHX 07:30AA 1194	2h 40m Phoenix	PHX 10:10 → BOI 13:27AA 4948 · flown by SkyWest	6h 16m	96%	89%
Alaska Details →	ONT 14:05 → SEA 16:45AS 567	3h 14m Seattle	SEA 19:59 → BOI 22:24AS 2034 · flown by Horizon	7h 19m	100%	84%
Alaska Details →	ONT 10:54 → PDX 13:09AS 1699	1h 49m Portland	PDX 14:58 → BOI 17:16AS 342	5h 22m	98%	84%
Delta Details →	ONT 11:59 → SEA 14:53DL 4070 · flown by SkyWest	1h 42m Seattle	SEA 16:35 → BOI 19:13DL 3688 · flown by SkyWest	6h 12m	95%	82%
Tight connection: often missed
Southwest Details →	ONT 20:42 → PHX 21:58WN 3160	47m Phoenix	PHX 22:45 → BOI 01:48 +1WN 2554	4h 05m	30%	18%
United Details →	ONT 18:39 → SFO 20:07UA 5624 · flown by SkyWest	52m San Francisco	SFO 20:59 → BOI 23:55UA 6027 · flown by SkyWest	4h 16m	11%	7%
Southwest Details →	ONT 16:40 → LAS 17:45WN 2213	47m Las Vegas	LAS 18:32 → BOI 21:12WN 1102	3h 32m	14%	4%

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 15m · leaves 06:02 5%

DEN · 1h 05m · leaves 06:00 9%

Afternoon and evening

PHX · 47m · leaves 20:42 70%

LAS · 47m · leaves 16:40 86%

SFO · 52m · leaves 18:39 89%

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.


Southwest WN 864 ONT 05:15 → PHX American AA 4948 PHX 10:10 → BOI Connection details →	3h 40m	7h 12m	98%	91%
Southwest WN 3166 ONT 09:45 → SMF Alaska AS 2157 SMF 13:10 → BOI Connection details →	2h 00m	4h 50m	97%	89%
Alaska AS 567 ONT 14:05 → SEA Delta DL 3692 SEA 19:50 → BOI Connection details →	3h 05m	7h 23m	100%	84%

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