Friday, October 9 · typical odds for a Friday (too early for a weather forecast) · issued Sun 4:00 PM ET · connections flying that day

Fri, Oct 9: no forecasts for this route’s flights; their 12-month records are below.

Nonstops that day

All 1 nonstop →


AS 2368 Alaska flown by Horizon no forecast: 12-month record	PDX 12:13	BIL 15:03	4%	2%	1.9%	96%

Best connections that day, one ticket

Most reliable Quickest (80%+ on time)

Ranked by chance you reach Billings on time, from each leg’s forecast for the day. Total trip = scheduled departure to arrival (Billings is 1 h ahead of Portland). Layovers up to 4 hours. Pick a connection for its 12-month details.


Delta Details →	PDX 05:45 → SLC 08:33DL 1270	1h 07m Salt Lake City	SLC 09:40 → BIL 11:09DL 4038 · flown by SkyWest	4h 24m	99%	94%
Delta Details →	PDX 09:45 → SLC 12:33DL 1203	3h 52m Salt Lake City	SLC 16:25 → BIL 17:52DL 3828 · flown by SkyWest	7h 07m	100%	91%
Alaska Details →	PDX 17:30 → SEA 18:33AS 430	2h 26m Seattle	SEA 20:59 → BIL 23:51AS 2457 · flown by Horizon	5h 21m	100%	90%
Alaska Details →	PDX 05:00 → SEA 05:53AS 2431 · flown by Horizon	2h 15m Seattle	SEA 08:08 → BIL 11:05AS 2337 · flown by Horizon	5h 05m	100%	86%
United Details →	PDX 05:00 → DEN 08:31UA 459	3h 14m Denver	DEN 11:45 → BIL 13:22UA 703	7h 22m	99%	85%
Alaska Details →	PDX 06:19 → SEA 07:17AS 499	2h 52m Seattle	SEA 10:09 → BIL 13:05AS 2054 · flown by Horizon	5h 46m	100%	80%
United Details →	PDX 08:50 → DEN 12:24UA 2375	3h 11m Denver	DEN 15:35 → BIL 17:19UA 5498 · flown by SkyWest	7h 29m	98%	80%
United Details →	PDX 12:50 → DEN 16:28UA 1411	3h 12m Denver	DEN 19:40 → BIL 21:17UA 1417	7h 27m	98%	79%

How these are worked out. Each flight’s odds are our forecast for that day (typical odds until the weather forecast covers it); flights of airlines we don’t forecast yet use their 12-month record and are marked. Makes the connection: the first flight’s 12-month lateness curve, scaled so its chance of arriving 15+ min late matches the day’s forecast, at the layover minus the 45-minute minimum (90 on separate tickets). Arrives on time: first flight not cancelled × connection made × second flight not cancelled × second flight within 15 minutes, each from the day’s forecast.

About this data: forecast odds from our model for Fri, Oct 9 (newest published update); 12-month records from US DOT on-time data, Aug 2025 – Jul 2026, all US airlines; regional flights count under the airline that sells them. JSON