The main flight attendants union of the German Airline, Lufthansa threatened they are considering additional strike protest against their airline employer on Friday at the Frankfurt Airport, which also marks the end of the week-long walk out protest. The flight crew's work stoppage had been paralyzing Lufthansa Airlines' main flights.

According to the Reuters, the union's leader, Nicoley Baublies said on a statement that strike may occur again if Lufthansa still doesn't make any changes. "This strike will end tonight, but if management doesn't change, then strikes will be possible again at any time," Baublies said UFO union's head. The Lufthansa Airlines management had been making deals with their flight crews over the early retirement benefits and pensions issues for two years. It is in regards of the airlines management plans to cut cost of the early retirement benefits and pensions leading it to the flight crew union's big disagreement, demanding to continue the existing early retirement and pensions wage. 

On Friday, Lufthansa force to cancel more than 900 connections, with 4,700 of halted flights in total amidst the weeklong strike protest, the Bloomberg reported. Flight crews had the last day of the weeklong work stoppage at the Frankfurt Airport on Friday and was said took notice of additional strikes to push their demands on the German airline.

Lufthansa's Chief Executive Officer, Carsten Spohr plans to cut cost of the overhaul Lufthansa and develop the Eurowings division in order to compete with budget airline rivals like Ryanair Holdings Plc and EasyJet Plc made him lose about 100 million euros ($108 million) on the current workers strike as well as losing 550,000 flight customers, Kepler Cheuvreux estimated.

The German airline released a statement of apology on the affected customers. "Lufthansa would like to sincerely apologize again to all customers who have been affected," the airline said in a statement. "The company has done its utmost to keep the effects on its customers as low as possible."