AS4639 BoiseBOI San FranciscoSFO
AS4639 by Alaska Airlines flies from Boise (BOI) to San Francisco (SFO).
scheduled from BOI
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Measured, 90-day sampleConditions at BOI and SFO are near their clear-air norm right now, so this reflects the route's recent baseline rather than a weather penalty. For this route and airline, under conditions like today's, over the last 90 days.
Pro Flight Search tracking, 90 days · the weather × delay correlation study → · live weather risk by airport →
When it flies
scheduled departuresEach mark is a scheduled departure at its origin-local time. Today is highlighted.
Other Boise to San Francisco flights today
same route · Alaska AirlinesIf AS4639 is cancelled, this is the other Alaska Airlines nonstop flight from Boise to San Francisco on the same day, with scheduled departure times in BOI local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →
How AS4639 actually runs
Pro Flight Search has tracked every published board update for AS4639 across the BOI and SFO boards: schedule changes, gate pushes and actual clocks. Combined risk score: 50.0/100. Based on airport operations, weather, and cached board history at BOI and SFO.
The verdict above is that record speaking, so it reflects how AS4639 operates rather than what the timetable promises. Numbers refresh as new flights operate.
Planning around AS4639? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.
Pro Flight Search — AS4639 Boise to San Francisco on-time performance, measured from the BOI and SFO airport boards.
https://proflightsearch.com/flight/AS4639
.