Running RotRL, and the party is about to go up against Xanesha. The cleric of Desna has Fly, and knows Xanesha is up in the watchtower. Fly is a touch spell, and from what I read of touch spells:
You can touch up to 6 willing targets as part of the casting, but all targets of the spell must be touched in the same round that you finish casting the spell.
Is it possible for the cleric to (as a full round action) cast the spell and touch the other 4 party members at the same time, giving everyone fly?
Target creature touched
This is shorthand for "1 creature touched", so no, since fly only affects one target.
The touching multiple targets rule is for spells that allow you to touch multiple targets. For example, the Communal class of spells.