1. Take the RER B train from Gare du Nord to Gare du Nord-La Chapelle.
2. The train ride takes about 2 minutes and costs €1.90.
3. Once you arrive at Gare du Nord-La Chapelle, you will be at the La Chapelle metro station.
Option 2: Bus
1. Take bus line 350 from Gare du Nord to La Chapelle metro.
2. The bus ride takes about 10-15 minutes and costs €1.90.
3. Once you get off the bus, you will be at the La Chapelle metro station.