I caught a glimpse of the Aurora once on a flight from JFK to ARN (Stockholm). I don't think the flight went far enough north to see the really good stuff. What I saw was a line of blue in the night sky. In my grogginess I thought for a minute the sun was rising, but after staring at the blue color for a while I could see it was shifting around in the sky. It was nothing all that special, but I was able to impress my non-frequent-flyer friends with the description.