do a favor -- Will you do me a favor?

or

ask a favor -- Can I ask you a favor?

Favor in Spanish means the same as in English. To say "por favor" (for favor) means please. "A favor de" means in favor of. "Da me un favor" is do me a favor.

The verb for 'favor' is 'to favor'.

para favor

We can say, "I am looking for a favor from you." But if we're looking for a favor from someone, we don't usually tell them we are. We usually ask them for a favor, and leave it up to them whether or not they will favor us. After all it is a favor, not an obligation.