That depends on how connected you were to the other person (was it just sexual? emotional? both?) and how long the affair lasted. The deeper the emotional connection and the longer the affair went on, the more time it will take to get over it. Although it might feel like this is something you will never get over, the intensity of your emotional connection will diminish over time. It may take months before you stop feeling the pull back to the other person, and even then another contact might stir your longing for him/her again.
So if you're serious about moving after an affair, you must break off ALL contact with the other person. No exceptions. Every time you re-establish contact with him/her, you extend the time it will require to get over the relationship.
