Many thanks for those replies. I booked via Orbitz, but my payment went to Lufthansa directly, so they would be the principle airline for this trip.
Previously most of my international travel has been ANZ or Qantas, but I chose this route to Europe as the shortest great circle route touches the tip of Greenland and I'm hoping for a window seat on the left so as to get a chance to see those ice sheets (weather permitting).