Five people died in two separate regions of France as a result of treacherous driving conditions, authorities said, while one woman was also killed in Bosnia's capital, Sarajevo, after 16in (40cm) of snow fell on the city.
Hundreds of flights have been cancelled across Europe, with thousands left stranded at airports in Paris and Amsterdam.
Disruption is expected to continue into Wednesday.
In France, three people died in two separate incidents in Landes, in the south-west, due to black ice, authorities said.
