Flying with non faa/car car seat

in General chat
Hi guys,
need some help on this topic
I’ve booked tickets for myself and baby to fly to Poland with a car seat. At the time of booking I was unaware that there were such things as flight approved car seats
i already be a perfectly fine car seat to use and dont have the funds to by another
has anyone flown with a non approved car seat without any issues?
Would love some advise on this issue
thanks x
0