Sustained Flight

You touch a willing creature.  The target gains a flying speed of 60 feet for the duration.  When the spell ends, the target falls if it is still aloft, unless it can stop the fall. 

At Higher Levels.  When you cast this spell using a spell slot of 6th level or higher, the spell's duration doubles for each slot level above 5th: 1 hour at 6th level, 2 hours at 7th level, 4 hours at 8th level, and 8 hours at 9th level.