Commercial Fixed Wing
Flight Crew Multiengine; Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument
Situational Awareness
Conflict Airborne Conflict
Flight Crew FLC complied w / Automation / Advisory
Procedure; Airport; Airspace Structure; Chart Or Publication
On final approach into SEA; we received an RA (Resolution Advisory) from traffic below us in the BFI VFR traffic pattern. Seattle Tower said that they reported the traffic to us but both the Captain and I never heard the call for traffic from Tower. We were established on the localizer and glideslope for the ILS 16R into SEA. The Captain responded to the RA and we continued the approach uneventfully.
Air carrier First Officer reported receiving an RA on final approach for an unidentified VFR target at an adjacent airport.