We left Multan around 1330 hours.
The following route was suggested for Islamabad:
Multan~GT Road~Kachcha khoo~Abdul Hakim Cantonment~Peer mahal~Toba Tek Singh~Faisalabad~ Motorway~Islamabad.
It went well till Toba Tek Singh and then I missed a right turn on Main Toba Road (A) and drove non-stop to Jhang This caused me to drive 'some' extra miles.
After finding it, we decided to take Chinniot~Pindi Bhattian route to enter motorway, but my friends called me to avoid it after Maghrib. We entered Motorway through Kamalpur interchange and reached Islamabad around 2300 hours. (safely Alhamdolillah)