Here are a few suggestions for your next trip from Calais-Fréthun

In 2 hours, you can reach Lille, Brussels, Paris, Anderlecht, Schaerbeek, Molenbeek-Saint-Jean, Ixelles, Uccle.

In 3 hours, you can reach London, Rotterdam, Antwerpen, Gent, Charleroi, Liège, Brugge, Namur, Leuven, Mons...

In 4 hours, you can reach Amsterdam, Dudelange, Lyon, The Hague, Utrecht, Schifflange, Köln, Bettembourg, Strasbourg, Tilburg...