Commercial Fixed Wing
Flight Crew Instrument; Flight Crew Air Transport Pilot (ATP); Flight Crew Multiengine
Flight Crew Last 90 Days 21; Flight Crew Type 1452
Distraction; Training / Qualification
Deviation / Discrepancy - Procedural Published Material / Policy
Flight Crew Overcame Equipment Problem
Company Policy; Procedure; Human Factors
After pushback and engine start; my before taxi was interrupted when I noticed the squawk was not inputted. I left the flow to enter the PDC and retrieve the code. I had some difficulty with the box; and it took longer than expected. Once the code was retrieved and entered; my concentration was interrupted by ground movement off our right wing that I was monitoring. Then Ground asked us if we were ready to taxi and I said yes. Once taxiing; we saw that the flaps were up. We stopped short of the runway and accomplished the flow checklist and looked for other errors we could have missed. I was definitely rusty having not flown much in the previous 30-90 days. So; finish a flow; accomplish the checklist; and slow down when things are busy.
Air carrier First Officer reported taxiing out to the runway and finding items were missed during their before taxi flow checklist.