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Any day
Wednesday, October 7 · our forecast odds · issued Mon 7:00 AM ET · connections flying that day

Wed, Oct 7: Delta via Minneapolis, leaving 07:10, is the safest bet: 94% chance of reaching Portland on time.

Nonstops that day

All 2 nonstops →
AS 311 Alaska Flight history → BOS 09:36 PDX 12:28 9% 2% 0.7% 88%
AS 1319 Alaska Flight history → BOS 16:54 PDX 20:15 12% 3% 0.7% 71%

Best connections that day, one ticket

Ranked by chance you reach Portland on time, from each leg’s forecast for the day. Total trip = scheduled departure to arrival (Portland is 3 h behind Boston). Layovers up to 4 hours. Pick a connection for its 12-month details.

DeltaDetails → BOS 05:55 → MSP 08:04DL 2303 2h 54m Minneapolis MSP 10:58 → PDX 12:39DL 1661 9h 44m 99% 94%
DeltaDetails → BOS 05:30 → ATL 08:21DL 2242 2h 39m Atlanta ATL 11:00 → PDX 12:58DL 2206 10h 28m 100% 93%
DeltaDetails → BOS 06:05 → SLC 09:17DL 859 1h 58m Salt Lake City SLC 11:15 → PDX 12:10DL 1209 9h 05m 99% 92%
DeltaDetails → BOS 06:05 → JFK 07:30DL 2611 1h 00m New York JFK 08:30 → PDX 11:36DL 1574 8h 31m 98% 92%
DeltaDetails → BOS 11:50 → MSP 14:02DL 1103 1h 56m Minneapolis MSP 15:58 → PDX 17:35DL 2008 8h 45m 98% 92%
UnitedDetails → BOS 07:45 → DEN 10:19UA 647 3h 08m Denver DEN 13:27 → PDX 15:13UA 2455 10h 28m 100% 91%
DeltaDetails → BOS 05:30 → DTW 07:38DL 1019 1h 16m Detroit DTW 08:54 → PDX 10:36DL 2171 8h 06m 98% 91%
DeltaDetails → BOS 10:15 → ATL 13:04DL 385 3h 48m Atlanta ATL 16:52 → PDX 18:56DL 503 11h 41m 100% 91%
How these are worked out. Each flight’s odds are our forecast for that day; 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 Wed, Oct 7 (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