I hope you don't get too bored to observe, compare and consider those clouds until the plane's landing at TFS.
Almost by accident, I used the 45-200mm tele lens, which turned out to be better than the wide angle lens for this purpose. I was unfamiiar with the lens and had some focusing difficulties. The next time I'll do better. I might also try a polarizing filter to get around some of the usual problems caused by air plane windows.
This vid depicts more or less scenic clouds over Western Europe, as seen from a passenger seat on November 10th, 2011.
There are two phenomena that puzzle me:
1. I know that some higher clouding emanating from low stratus can be caused by something like the cooling tower of a power plant on land - but what on earth caused solitary thick cumulus clouding out over the sea, like in the Gulf of Biscay???
2. Why were there on this day only a few small cumuli above the high enough island of Gran Canaria, while there was a rather compact cloud ring around Tenerife??? Orographic clouds normally form over Northern Gran Canaria as well, so why not on this day???