A budget trip to Sikkim can cost around INR 10,000-15,000 per person for a week, while a mid-range trip can cost around INR 20,000-30,000 per person. A luxury trip to Sikkim can cost upwards of INR 50,000-60,000 per person for a week. These are just rough estimates, and the actual cost of your trip may vary depending on your preferences and travel style.