Citibank might be a familiar name, having origins inside the US. This bank is great for expats and non-residents who handle a lot of multi-location banking. If you deposit over 3 million Thai Baht (THB) (about $92,930 USD) into your bank your account will automatically update to a Gold status. Using the Citibank credit card allows you to build points that can be later redeemed for savings at Thai Air.