Visual flight rules (VFR) are a set of regulations under which a pilot operates an aircraft in weather conditions generally clear enough to allow the pilot to see where the aircraft is going. There are two sets of rules for flying any aircraft: VFR and IFR. VFR stands for Visual Flight Rules and IFR means Instrument Flight Rules. Depending on the weather conditions a pilot may opt for one set of rules or the other. There are a number of other factors that influence the decision but for simplicity’s sake it’s the weather that make you fly VFR or IFR.