Do you know why credit score decreases when you cancel your credit card? Yes it does decrease but not for long time. If you are one of those ppl who doesnot carry a balance, you will be fine. When u have an extra credit card, your credit utilization percent decreases so after canceling the card, credit utilization increases little bit. So, credit score goes down for some months. This is just temporary and you will never have a some sort of derogatory effect. If you are applying for a mortgage loan or any sort of loan with in couple of months I wouldnot advise it. If not, apply for a credit card with an airline enjoy the benefit of priority boarding, use of lounges on your way to KTM and cancel when u get bk.

BTW, most of those airlines card doesnot have any foreign transaction fee which could be a plus.