How long will it take for an international payment to arrive?

This depends on the type of international payment you have chosen to make.

A fee will apply for all urgent payments and funds should reach the recipient in 1 - 2 business days. All standard payments are free of charge. Standard euro payments within the SEPA zone should reach the recipient the same day (you have until 2PM to arrange the payment), for all other countries standard payment should reach the recipient in 2 to 4 working days.

List of SEPA countries can be found here.