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

Take the nonstop: Alaska STS → ONT (1h 28m) reaches Ontario on time 9 times in 10; the most reliable connection, Southwest via Las Vegas (4h 15m), 46%.

Nonstops (seasonal or thin)


Alaska	STS	ONT	1h 28m	91%	0.0%	136	Flying now

Best connections, any airlines

Most reliable Quickest (80%+ on time)

Ranked by chance you reach Ontario on time. Total trip = scheduled departure to arrival, layover included. Layovers up to 4 hours. Pick a connection for the details.


Alaska + Frontiertwo ticketsDetails →	STS 13:06 → LAS 14:44AS 2459 · flown by Horizon	3h 59m Las Vegas	LAS 18:43 → ONT 19:51F9 2231	6h 45m	100%	77%
Alaska Details →	STS 12:52 → SEA 14:55AS 1322	2h 56m Seattle	SEA 17:51 → ONT 20:32AS 592	7h 40m	100%	74%
American Details →	STS 13:09 → PHX 15:20AA 6361 · flown by SkyWest	1h 47m Phoenix	PHX 17:07 → ONT 18:21AA 864	5h 12m	90%	73%
American Details →	STS 16:12 → PHX 18:23AA 6459 · flown by SkyWest	2h 07m Phoenix	PHX 20:30 → ONT 21:44AA 1238	5h 32m	92%	65%
American Details →	STS 13:00 → PHX 15:09AA 3514 · flown by Envoy	1h 55m Phoenix	PHX 17:04 → ONT 18:18AA 2639	5h 18m	93%	57%
Southwest Details →	STS 15:55 → LAS 17:40WN 3992	1h 30m Las Vegas	LAS 19:10 → ONT 20:10WN 208	4h 15m	86%	46%
Tight connection: often missed
Alaska Details →	STS 19:03 → PDX 20:36AS 2331 · flown by Horizon	54m Portland	PDX 21:30 → ONT 23:51AS 97	4h 48m	50%	40%

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

PDX · 54m · leaves 19:03 50%

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