The major international airport in The Netherlands is Amsterdam (Schiphol). If you arrive at Schiphol it is convenient to take the intercity train to 's-Hertogenbosch (about one hour).
Warning: be careful for pickpocketing at Duivendrecht!
The train table might be subject to minor changes in the summer of 2004. For an update please visit: http://www.ns.nl. Enter Schiphol in the From field and Hertogenbosch in the To field.