There are no shuttle services from campus, but cabs are readily available. Let your driver know you need to go to "Columbia University at 116th and Amsterdam." If you are traveling from the Newark, JFK, or LaGuardia airports, it is possible to use a variety of buses and trains to get to the University. Be mindful that this route will take some time and may involve multiple modes of trasnportation. Please visit http://mta.info and use the "trip planner" tool to get a route to campus.