The baggage allowance to which you are entitled will vary from airline to airline and between scheduled carriers like KLM, Air France, BA and low cost/no frills airlines such as Aer Lingus or Easyjet.
Scheduled carriers will usually give an included baggage allowance for checked luggage as well as permitting a small amount of hand luggage to be taken into the aircraft cabin. Amounts may vary according to destination and airline so please contact us on the number given on your confirmation email for the precise amount in kilograms.
Low Cost/No frills airlines eg Aer Lingus, EasyJet charge for checked luggage. This should have been offered to you as an option during the booking process and will be shown on your flight confirmation. Hand luggage to be taken into the aircraft cabin is strictly limited and must conform to both the weight and the size allowance that the airline specifies. If you are in any doubt please contact us.