Mussoorie 6 hrs away from Delhi
Nainital 7 hours away Bhimtal 6 hours away
Almora 8 hrs away
Ranikhet 8 hours away, are some nearby places for you to do an easy travel with a small baby.
If you are planning to visit with four months toddler it means you are not looking adventures trip just wanted to get away and get relaxed. Then Mussoorie, Manali, Nainital and Mcleodganj are best options and all are nearly 8-12 hrs away from Delhi. Good Luck