Medium Transport; Low Wing; 2 Turbojet Eng
Flight Crew Instrument; Flight Crew Air Transport Pilot (ATP); Flight Crew Multiengine
Situational Awareness
Conflict Airborne Conflict; Inflight Event / Encounter Weather / Turbulence
Flight Crew Took Evasive Action
Human Factors
On arrival to APA. Moderate turbulence over the Front Range north of Denver. ATC vectored us east of downtown enroute to APA. Declared airport insight and cleared for visual approach. Had the RNAV GPS RWY 17L set in FMS for awareness and set 6800 ft in altitude alerter for mandatory altitude at LOWRE intersection. Position about 8 miles NW of APA. TCAS indicated two contacts; one along the extended centerline to 17L that appeared to be traveling north and another west of the airport in a right downwind for 17L. ATC recommended we turn to right base; which was outside LOWRE for aircraft to our east; traveling north; but we opted to continue on our angled course to join between LOWRE and CENTN (FAF) because the left turn to right base would have created conflict with that aircraft. The two other aircraft indicated +/- 100-200 feet vertically around our position. As we continued the aircraft to the east appeared to turn towards us while the one in the right downwind continued northbound; both closing our position. I turned off autopilot; turned southbound; and immediately descended below both aircraft about 200 feet as the SIC recommended we descend. TCAS gave us a TA but no RA. With both aircraft insight we then made the left turn to right base and conducted a stable approach visually to 17L.ATC and crew were aware of all aircraft and the situational picture but not the intentions of the other two aircraft other than they were in the pattern for 17L at KAPA. Thinking about and discussing our options afterward; we talked of how we could have just requested the actual IFR approach or having seen the aircraft on TCAS; asked tower if we could turn southbound to turn back for a 45 degree entry into the right downwind.
Fractional Captain reported evading two aircraft while on approach to APA.