Pilots at Germany's Lufthansa to strike in Frankfurt on Tuesday

FILE - In this Sept. 10, 2014 file picture airport employees prepare aircrafts of the airliner Lufthansa at the airport during an eight-hour warning strike of Lufthansa pilots in Munich, southern Germany. A union representing Lufthansa's pilots says they will walk off the job at Frankfurt airport for eight hours on Tuesday, preventing departures by Germany's biggest airline from its busiest airport. The Vereinigung Cockpit union said Monday Sept. 15, 2014 that pilots on international long-distance flights from Frankfurt will walk out from 9 a.m. to 5 p.m. (0700 to 1500 GMT). The two sides are locked in a dispute over the pilots' demand that Lufthansa keep paying a transition payment for those wanting to retire early. (AP Photo/Matthias Schrader,File) (The Associated Press)

A union representing Lufthansa's pilots says they will walk off the job at Frankfurt airport for eight hours on Tuesday, preventing departures by Germany's biggest airline from its busiest airport.

The Vereinigung Cockpit union said Monday that pilots on international long-distance flights from Frankfurt will walk out from 9 a.m. to 5 p.m. (0700 to 1500 GMT). The work stoppage follows several strikes in the past three weeks by Lufthansa pilots in Munich and pilots at Lufthansa's Germanwings subsidiary.

The two sides are locked in a dispute over the pilots' demand that Lufthansa keep paying a transition payment for those wanting to retire early. The airline, which faces tough competition from European budget airlines and major Gulf airlines, wants to cut those payments.