B757-200
Flight Crew Instrument; Flight Crew Air Transport Pilot (ATP); Flight Crew Multiengine
Flight Crew Last 90 Days 40; Flight Crew Total 8000; Flight Crew Type 600
Situational Awareness; Communication Breakdown
Aircraft Equipment Problem Critical; Deviation - Speed All Types; Deviation / Discrepancy - Procedural Published Material / Policy
Flight Crew Overcame Equipment Problem; Flight Crew Returned To Departure Airport; Flight Crew Landed in Emergency Condition
Procedure; Human Factors; Aircraft; Company Policy
We arrived at ZZZ after receiving minimum rest due to weather delays the previous duty period. Normal preflight; startup and taxi to Runway XX intersection X1 for takeoff. At approximately 90 knots; airspeed stagnation was noted and then airspeed increased. On climbout; we received the IAS Disagree caution. The Captain advised ATC. We leveled initially at 4;000 feet and the Captain took over the Pilot Flying role. I became Pilot Monitoring and worked with the jumpseater; who was an experienced B757 Captain; to run the checklists. Once checklists were completed and power settings were calculated. We requested vectors to the ILS at ZZZ. Approach vectored us and a successful landing was made. Upon return to the ramp; it was discovered that all four pitot covers were still installed.
B757-200 First Officer reported IAS errors resulted in return to airport to find pitot covers still installed.