Cheap Bus and Train tickets to Amsterdam, US

What are the most popular routes to Amsterdam?

New York City - AmsterdamAverage priceCOP 280 116Average duration3h 37mDaily departures3
Charlotte - AmsterdamAverage priceCOP 442 520Average duration23h 40mDaily departures3
Syracuse - AmsterdamAverage priceCOP 100 189Average duration2h 10mDaily departures2
Washington - AmsterdamAverage priceCOP 299 440Average duration14h 30mDaily departures6
Rochester - AmsterdamAverage priceCOP 200 248Average duration3h 30mDaily departures4