The Dutch carrier has been a pioneer in the use of social media tools and its corporate blog could not be less. KLM's blog has a nice personal touch, presenting stories from all corners of KLM's network, and their Facebook page is also a must for any aviation history enthusiast, capitalizing on the airline's long history as the Dutch flag carrier and a real commercial aviation pioneer (KLM was founded in 1919, which makes it the oldest airline in the World still operating!). You can find some great pictures that will help you imagine how the passenger experience was in those early days of aviation!
2) Air New Zealand
Air NZ has been delighting observers of airline marketing for quite some time, with simple product innovations that have, nevertheless, the potential to improve considerably the passenger experience, funny aircraft safety videos and cute furry mascots...and Air New Zealands blog is up to what you would expect of such as creative airline...The Flying Social Network does not look like one more corporate blog, it's got a clean design, interesting articles and nice visuals...I do not tend to follow corporate accounts, but I made an exception with this one!
Well, this is a classical one, and the Quality Hunters initiative got already its space in this blog, so I will point you towards my post of 2010: "Finnair, rethinking quality"