Sunday, October 11 · typical odds for a Sunday (too early for a weather forecast) · issued Mon 12:00 AM ET · connections flying that day

Sun, Oct 11: 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 09:45 → SLC 12:33DL 1203	3h 52m Salt Lake City	SLC 16:25 → BIL 17:52DL 3828 · flown by SkyWest	7h 07m	100%	80%
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%	79%
United Details →	PDX 05:00 → DEN 08:31UA 459	3h 14m Denver	DEN 11:45 → BIL 13:22UA 703	7h 22m	99%	79%
Alaska Details →	PDX 12:20 → SEA 13:23AS 3038 · flown by SkyWest	2h 26m Seattle	SEA 15:49 → BIL 18:42AS 2353 · flown by Horizon	5h 22m	95%	78%
United Details →	PDX 08:50 → DEN 12:25UA 2375	1h 20m Denver	DEN 13:45 → BIL 15:29UA 5845 · flown by SkyWest	5h 39m	95%	72%
Delta Details →	PDX 15:00 → MSP 20:22DL 1661	1h 58m Minneapolis	MSP 22:20 → BIL 23:30DL 2941	7h 30m	95%	69%
Delta Details →	PDX 17:14 → SLC 20:06DL 1244	1h 19m Salt Lake City	SLC 21:25 → BIL 22:50DL 1340	4h 36m	89%	60%
United Details →	PDX 16:15 → DEN 19:51UA 1787	1h 19m Denver	DEN 21:10 → BIL 22:54UA 5257 · flown by SkyWest	5h 39m	86%	56%

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 Sun, Oct 11 (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