I recently just booked a holiday to Portugal with jet2. On the confirmation it says I can't check in online before the trip I must do this at the airport because a member of staff must check my 16 month old (will be 20 months when we go) is strapped in to a suitable seat. We were told when we made the booking he won't have his own seat. So now I'm slightly confused, does he need to be in a car seat to go or just sit on our lap?