Where in Alaska
The State of Alaska's travel guide says the northern lights can be seen anywhere in the state but are most often seen in the Interior and Arctic regions, with Southcentral, including Anchorage, as another base. That matches the order of the reference points above, from Utqiaġvik and Fairbanks to Anchorage and Juneau. Each row is assessed separately; for a single-city answer with Fairbanks detail, use the Fairbanks forecast page.
Source: Travel Alaska — Northern lights viewing