ERJ 145 First Officer reported smoke in the flight deck. After landing; the aircraft produced a pack overheat warning. Passengers exited the aircraft normally.

Narrative

Normal take-off and climb with no abnormalities. Approximately 15 minutes from our destination the Captain and I started to smell smoke in the cockpit; no visual signs of smoke in the cockpit at that time. We could smell the smoke for about thirty seconds and I was pulling out the QRC/QRH. The smoke seemed to dissipate and we could not find the source and all systems looked to be operating normally. At that point the Captain and I monitored the situation and they chose to continue the flight. Approximately 10 minutes out; as we were starting our descent that is when we began to smell the smoke again; but still had little to no visual smoke on board. That is when we relayed to ATC that we had smoke in the cockpit and ATC [requested priority handling]. On the descent the Captain advised me to open the QRC/QRH and start the smoke fire or fumes checklist. At that point we put on our oxygen mask and established communications; we forgot the smoke goggles. I did stop on the checklist after pushing out the recirculation fan and gasper fan as we were setting up for our final approach into ZZZ and I saw the next step was the descent. We were cleared for the RNAV XX and while on the approach didn't notice any smoke building in the cockpit. Normal landing with no abnormalities. On the taxi in as we were turning into the gate we did get a pack one overheat message. Once pulled into the gate all the passengers were de-boarded safely.