Does it cost something to transfer Avios between Finnair Plus and British Airways Executive Club?

No, it doesn’t. Transferring Avios between your Finnair Plus and British Airways Executive Club accounts is free of charge. Avios are worth the same in both programs: 1 Avios in Finnair Plus equals 1 Avios in British Airways Executive Club. You can also transfer your Avios between your accounts as often as you wish. Read more about transferring Avios.