Manoj Gowda MHShaikh Smart buy charges ₹35 and usual 1%+ GST on credit card payments. Amazon charges ₹35 + ₹40 as fee. When booking large sum of tickets, Use SBI CB + Amazon way is better and HDFC + SmartBuy when ticket price below 3400.
SSP Go to Amazon flights + trains section. Book ticket there and pay using amazon pay balance. No extra charges