Book Bus Online at flat Rs.75 off at Redbus. This offer is only valid on transactions made through FreeCharge wallet. Maximum discount is Rs. 75. Minimum booking amount required of Rs.300. You can book bus for almost all the places across India. Offer can be utilized once per user. The cash back of Rs. 75 will be credited to user’s FreeCharge wallet and can be redeemed further on recharges or bookings.