नहीं कोई गम, रेलवे से हैं हम - Aman

There's some cool trains going from CDG to NDLS:
12006 Kalka - New Delhi Shatabdi: leaves at 06:53 and gets to NDLS by 10:15
12046 Chandigarh - New Delhi Shatabdi: departs at 12:05 and arrives at NDLS by 15:20
20978 Chandigarh - Ajmer Vande Bharat: starts at 15:15 and reaches DEC at 18:33 (Coming soon from 12th March)
22448 Amb Andaura - New Delhi Vande Bharat: kicks off at 15:32 and hits NDLS at 18:25
12012 Kalka - New Delhi Shatabdi: leaves at 18:23 and reaches NDLS by 21:50

The two Vande Bharats from CDG to Delhi will have a 17-minute difference from Chandigarh, even though they go to different stations in Delhi :)

CDG - NDLS Premium Trains Connections
12006 Kalka - New Delhi Shatabdi Express CDG-06:53/NDLS-10:15
12046 Chandigarh - New Delhi Shatabdi Express CDG-12:05/NDLS-15:20
20978 Chandigarh - Ajmer Vande Bharat Express CDG-15:15/DEC-18:33 (Already Approved, to start running very soon possibly on 12th march)
22448 Amb Andaura - New Delhi Vande Bharat Express CDG-15:32/NDLS-18:25
12012 Kalka - New Delhi Shatabdi Express CDG-18:23/NDLS-21:50

Dono Vande bharats CDG se Delhi mein 17 min ka farak lekar chalenge, ek Chandigarh se NDLS pe aur ek DEC mein :)