Packing for a ski holiday could be tough especially if you have to take a flight. Lots and lots of airlines nowadays are billing for additional bags and especially for heavy ones. It is not unusual for people to pay as much as their flight ticket in extra luggage costs. If you think you are going to have to travel with a lot of stuff with you on a vacation it would be a good idea to travel with the flight company with the best luggage allowance or one that provides cheaper costs.
On most ski holiday destinations the flight companies are used to travellers taking skis and they generally to take this into account. Always notify the airline well in advance if not at the time of booking that you are going to be taking skis and get them reserved. The airline will have a limit on the amount of skis they can carry on each trip. You do not want to be in the nightmare position that you turn up at the airport and you can not take your skis with you on the plane.