Trade union UFO who represent Lufthansa's cabin crew have threatened further strikes could fall during the busy Christmas period if Germany's biggest airline does not make concessions in a wage dispute.

Strikes at Lufthansa (LHAG.DE) units Eurowings, Germanwings Cityline and Sunexpress remain possible despite arbitration talks at the German carrier, a spokesman for trade union UFO has said.

Dates of strikes will be announced in due course if no progress is made during continuing arbitration talks.