A DM who doesn't allow magic items is in the same realm as a DM who doesn't allow Feats or Multiclassing. A DM who doesn't want Flight in his games is probably going to block class choices that allow Flight.A DM restricting your class options and spells is completely different than a DM that doesn't give you every magic item you'd think is convenient for your character. If you want to fly as a monk, go 4Ele or multiclass.