There are many airport options when flying to Sint-Niklaas - the main two are Antwerp International Airport and Brussels Airport.
Antwerp International Airport is located around a 30 minute drive away from Sint-Niklaas. Alternatively, the airport offers a City Express Shuttle Bus which can be used to get to the Astridplein (Antwerp Central Station area). There are trains from Antwerp Central Station to Sint-Niklaas station every 15 minutes and the journey takes around 25 minutes.
Brussel Airport is a large international airporrt located around a 45 minute drive from Sint-Niklaas. There is a train station onsite which offers journeys to Sint-Niklaas around every 30 minutes which take 53 minutes for the journey with one change.
Sint-Niklaas station is a few minutes walk from the city centre. It has a refreshment bar and taxi rank available for visitors. The station is around a 10 minute taxi journey from the seminar venue or alternatively a 35 minute walk.