The most simple way of making a wire transfer to Bhutan is to visit a bank and make the transfer in person.
Some banks have the facility of making money transfer through their website and making the payment online with a credit card. Most of our guests transfer money through their banks website. If your bank has this online money transfer facility, check if Bhutan National Bank is on their list of banks. If the Bhutan National Bank is on the list, you can wire the money straight to the bank without channeling the transfer through the correspondent bank (Bank of America or Standard Chartered Bank or any other bank listed on the list of correspondent banks.
If the only way to transfer the money is by visiting the Bank and filling up the wire transfer form, do note that there are two SWIFT codes. One of for the correspondent bank and one is for the bank in Bhutan. Many people get confused with the two SWIFT codes given on the bank details for making the transfer.
Here is a sample form that had been filled up by a guest of ours in 2017.
And here are the list of correspondent banks you can use to make a wire transfer.