Orbx for the pacific nw and fjords and rockies. If you like Orcas Island, check out my videos for more, orbx has a great add-on airport for that. If you want airports in europe, mega airport series is the best. And for other parts of the USA, orbx is working on it, but many other developers haven't gotten to big US landmasses yet.

http://www.youtube.com/watch?v=Un7KLipLp9M&feature=channel_video_title