Quote from intradaybill:
All the US banks I know of you have to walk in to send a wire or send in a fax in some cases. NO online system for international wires for security reasons. Only big business accounts are provided with an interface for their backoffice to do wires. Which bank are you using?
Three of the banks I use allow this feature, but there are daily limits, such as 10k or 25k limits. First hand experience: Chase, Citi, and (the obscure but growing) USAA.