What is the estimated time from landing in ANC (Alaska Air)to getting to the next connecting flight (for example Raven Alaska). Would it be 30 minutes or less?

You can be anywhere in the airport in a 10 minute walk.

Know idea

10 to 15 min

30 Minutes is reasonable in light to moderate periods of air traffic. There are times of heavier traffic, especially multiple widebody aircraft disgourging 100's of passengers unto the same concourse and no 30 Minutes may not be enough. Raven and similar commuter airlines tend to have gates at the far reaches of the airport, and it can be a substantial hike for seniors, toddlers the tired or infirmed, especially when you are wading thru 100's of tourists milling around concourses. 45 years ago I could walk anywhere in the airport within half-hour, not so any longer