Karen, Whittier (where we get off the ship) is South of Anchorage, where the airport is, by about 125 miles (I think). Denali is North of Anchorage by however many million miles that would create an 8 hour train ride. Then it's 8 hours back to the airport. If we are on the dome-carred train you wouldn't have to sit the whole time.
Kathy, I am almost sure we get off the ship on 9/7 now, it would take us all that day to get to Denali. Then about all day to get back to the airport, on whatever day we chose. I didn't look to see how far Fairbanks is in the other direction, though.