Here are a few suggestions for your next trip from Boulogne-Billancourt

In 2 hours, you can reach Paris.

In 3 hours, you can reach Brussels, Lyon.

In 4 hours, you can reach London, Luxembourg, Rotterdam, Antwerpen, Esch-sur-Alzette.

In 5 hours, you can reach Amsterdam, Marseille, Genève, The Hague.

In 6 hours, you can reach Zürich.

In 7 hours, you can reach Schaan, Birmingham, Vaduz, Munich.

In 8 hours, you can reach Monaco, Barcelona, Milan, Liverpool.

In 9 hours, you can reach Berlin, Hamburg.

In 10+ hours, you can reach Madrid, Rome, Budapest, Warsaw, Vienna, Stockholm, Prague, Dublin, Zagreb, Bratislava...