Zone 1 - East
Florida to New York etc
Zone 2 - Central
Texas to Toronto Canada
Zone 3 - West
California - British Columbia, Canada
Smaller airports usually a deviation and therefore a charge it constantly changes I just have to email in to find out, the reservations cannot answer the question and i cannot inquire without a booking number.
There may be other options than Copenhagen but I honestly have not had any time to research this as I thought all along it would be a charter flight.
I know it is further but I will probaby still use FFmiles to Copenhagen and take the flight from there.
Not looked at coming home from Nome either.