I slept the first part of the flight up from Seattle. Then I looked out the window and wondered at the slight glow of a cloud. Could it be lights? As I stared the glow got brighter and greener.
These are not great photos of northern lights. Consider these experiments with my little Canon PowerShot. They look better than this in the camera screen. They're 1600 ISO through the window. I didn't use any telephoto because everything got really grainy that way.
But if you look closely, you can see that there were some interesting shapes, basically green. This is about 1:15 am.
Play around with the angle of your screen to get the best view.