Below are 2 of temples where you can conduct Kal Sarp Rahu Ketu Shanti Puja in West Delhi.
Sri Rajeshwari Temple
Address: C 1, Janakpuri, New Delhi - 110058
Contact: +91 11 2555 2863
Tip: You need to book the puja slot atleast 1-2 months in advance as their is heavy rush.
Cost of Puja: Rs450
Time: 8AM
Day: Amavasya (Once in month)
Sree Ayyappa Temple
Address: Sector-7, Rohini, New Delhi - 1100.
Contact: +91 11 2705 2015
Contact Person: Mohan Das
Website: http://ayyappatemplerohini.com/
Tip: You can book a week in advance. In special situation they entertain booking 10mins prior to Puja as well.
Cost of Puja: Rs500
Time: 8AM
Day: Amavasya (Once in month)