Originally Posted by
westi2002
Just make the booking online for all 4 of you and when you get to the payment page call KLM. They can handle more vouchers for the same booking.
KLM Twitter did respond to me stating I could use the 4 vouchers im one booking online. I haven't been able to get through to KLM on phone or messenger for days. Apparently I'm still in the messenger que after 4 days.