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 2297 Alaska flown by Horizon no forecast: 12-month record	BIL 15:43	PDX 16:46	6%	4%	1.9%	94%

Best connections that day, one ticket

Most reliable Quickest (80%+ on time)

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


Delta Details →	BIL 06:24 → MSP 09:27DL 2254	1h 32m Minneapolis	MSP 10:59 → PDX 12:40DL 1661	7h 16m	98%	88%
United Details →	BIL 05:00 → DEN 06:53UA 5829 · flown by SkyWest	1h 12m Denver	DEN 08:05 → PDX 09:48UA 1247	5h 48m	96%	87%
Delta Details →	BIL 05:20 → SLC 06:44DL 1360	1h 01m Salt Lake City	SLC 07:45 → PDX 08:37DL 1203	4h 17m	96%	86%
United Details →	BIL 07:04 → DEN 09:02UA 372	2h 25m Denver	DEN 11:27 → PDX 13:09UA 644	7h 05m	98%	81%
Alaska Details →	BIL 19:22 → SEA 20:35AS 2084 · flown by Horizon	2h 51m Seattle	SEA 23:26 → PDX 00:22 +1AS 2377 · flown by Horizon	6h 00m	99%	80%
Alaska Details →	BIL 06:00 → SEA 07:12AS 2247 · flown by Horizon	1h 28m Seattle	SEA 08:40 → PDX 09:39AS 279	4h 39m	96%	75%
Delta Details →	BIL 11:50 → SLC 13:22DL 4038 · flown by SkyWest	1h 55m Salt Lake City	SLC 15:17 → PDX 16:09DL 1244	5h 19m	99%	74%
Alaska Details →	BIL 13:45 → SEA 14:55AS 2055 · flown by Horizon	3h 04m Seattle	SEA 17:59 → PDX 18:56AS 2302 · flown by Horizon	6h 11m	98%	74%
Tight connection: often missed
United Details →	BIL 10:40 → DEN 12:33UA 5463 · flown by SkyWest	54m Denver	DEN 13:27 → PDX 15:13UA 2455	5h 33m	60%	46%

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