How do I choose seats on Singapore Airlines?

To select a seat on Singapore Airlines, dial 1 (800) 742-3333 or go to the airline's website.
When you reach the "Manage my booking" option, scroll down the screen.
You will then have the chance to choose your seat in accordance with Singapore Airlines seat selection policy.
When you make the appropriate payment for your chosen seat option, the airline will send you a letter confirming your selection of seats.
Singapore Airlines debits the credit card and notifies the customer through email that the transaction was successful.