Depends on the upper winds. I did LHR-SEA last week and the jet stream was in the wrong place over southern Iceland pushing us up to 75°N over Thule and the north magnetic pole. Furthest north all three of us had ever beeen (around 50 years of long haul experience in the FD). This is significantly off the great circle, which reaches no further north than 67°N.
This ended up with the wonderful experience of the sun setting as we flew north, and rising as we flew south. We also experienced the moon unsetting or rising in the West.
Flying is cool...