Getting grandchildren home for nan

Ok so as you all know my mum sadly passed away on 7th july and i know one wish she would of asked for is for her grandchildren to be there to say goodbye. Living in another country makes this very hard to do so im asking for as much help as possible i never ask for help but im desperate for my family to all be together when we say our final goodbyes to my mum i dont expect alot just as much as you can afford would be appreciated thank you so much my mum will be so happy to see everyone helping eachother out xxx