The two most popular slide films that aircraft photographers use are Kodachrome 64 and Fuji Sensia and both are quite comparable for price (well here in the U.K. they are), K64 has been the most popular one for a long time but now the Fuji film is catching up.
My personal preference is to use Fuji Sensia 100asa slides although I have been using the occasional role of K64 in my back up camera so here is my opinion on what it is like to use these two different types of film.
