How To Pack Skis
First, know that packing skis, boots, and poles on a flight could be expensive. Your equipment could be subject to your airline's oversize (and possibly overweight) checked-bag charges. However, many major airlines will accept one piece of ski equipment (boots or skis) as a checked bag—but you'll have to pay those bag fees. As always, contact your airline for information pertaining to your flight.
If you've chosen to check your skis, invest in good-quality, heavily padded baggage. After all, if you're footing the bill for the baggage fees, as well as for the skis themselves, you might as well spend some money to safeguard your stuff from rough-and-tumble baggage handlers. Consider stuffing your bag with some clothes to provide extra padding. (But keep an eye on those airline baggage-weight limits.)
And—this is important—label your bag. Put a luggage tag on each bag of sports equipment, as well as a copy of your travel itinerary inside of each bag. (Luggage tags sometimes get ripped off in transit.)