Can I use my BlaBlaBus voucher on other websites? BlaBlaBus vouchers and promo codes can only be used for journeys with BlaBlaBus. Related articles How do I use my credit voucher? I haven't used my voucher entirely, how can I get the rest of its value? In which cases can I be given a credit voucher? How to use my voucher? My booking failed and I lost my voucher, what can I do?