Commercial Fixed Wing
Flight Crew Instrument; Flight Crew Multiengine; Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 34; Flight Crew Total 2988; Flight Crew Type 2988
Situational Awareness
Deviation / Discrepancy - Procedural Published Material / Policy; Inflight Event / Encounter Unstabilized Approach
Flight Crew Executed Go Around / Missed Approach
Environment - Non Weather Related; Human Factors; Procedure
VMC approach to Runway XXR at ZZZ at night; PAPI OTS. We were cleared the visual on a right base to the FAF. We flew the approach in LNAV/VNAV and showed on glidepath as we approached the turn to final. I had gear down; flaps 15 as we rolled out and was slowing to 180 knots. We both felt we were high although the PDI indicated only slightly above glideslope. We continued to configure the aircraft and called for the landing checklist. At 500; I called 'stable' when we realized the flaps were at 25 not 30. The Captain selected flaps 30 and we continued the approach and landing without incident.This was the Captain's third flight since March; I have flown more recently but it's been 3 weeks since my most recent flight.
Visual approach night VMC to [Runway] XXR ZZZ.  PAPI inop. Upon accepting the visual approach from a modified right base to XXR we elected to follow the LNAV and VNAV path to the runway in visual conditions. Upon turning final we appeared to be high visually but VNAV was showing on path. We configured the aircraft rapidly; but on speed for gear down and final flaps.Upon reaching 500 feet both First Officer and I realized we were at flaps 25 not 30. I selected flaps 30 below 500 feet and we continued the approach and landing without incident.
Air carrier flight crew reported an unstabilized approach due to a wrong flap setting.