By Edith Fang
As many as 500 scheduled flights were cancelled due to the volcanic ash blowing through the continent.
While the effects were not as bad as last year's, the latest crisis has threatened the travel industry greatly with the cancellation of many flights.
Irish-based airline Ryanair has defied orders from the Irish Aviation Authority and has pressed for bans on air travel to be lifted.
Travel Advisory:http://news.sky.com/skynews/Home/UK-News/Video-Volcanic-Ash-Cloud-Travel-All-Your-Questions-Answered-About-Air-Delays-And-Cancellations/Article/201105415998497?lpos=UK_News_Top_Stories_Header_2&lid=ARTICLE_15998497_Video%2C_Volcanic_Ash_Cloud_Travel%3A_All_Your_Questions_Answered_About_Air_Delays_And_Cancellationshttp://news.cheapflights.co.uk/2011/05/flights-cancelled-by-ash-cloud/
In : Aviation & Travel