Twice weekly flights to St. Kitts via British Airways (10 minute ferry ride to Nevis).
Another option is to fly to Antigua and then catch a scheduled flight to Nevis.
KLM (Amsterdam) and Air France (Paris) daily into St. Maarten (three flights daily on WINAIR from St. Maarten into Nevis).
From North America
Daily Flights from Miami to St. Kitts via American Airlines (10 minute ferry ride to Nevis).
Weekly flights from New York, North Carolina and Atlanta into St. Kitts (10 minute ferry ride to Nevis).
Flights from all major US cities into San Juan, Puerto Rico and then a 60 minute connecting flight from San Juan directly to Nevis.