Aircrafts of Lufthansa's budget airline Eurowings stand on the tarmac of the Cologne-Bonn airport as Eurowings pilots go on a three-day strike, in Cologne, Germany, October, 17, 2022. REUTERS/Thilo Schmuelgen 

Aircrafts of Lufthansa's budget airline Eurowings stand on the tarmac of the Cologne-Bonn airport as Eurowings pilots go on a three-day strike, in Cologne, Germany, October, 17, 2022. REUTERS/Thilo Schmuelgen 

Aircrafts of Lufthansa's budget airline Eurowings stand on the tarmac of the Cologne-Bonn airport as Eurowings pilots go on a three-day strike, in Cologne, Germany, October, 17, 2022. REUTERS/Thilo Schmuelgen 

Aircrafts of Lufthansa's budget airline Eurowings stand on the tarmac of the Cologne-Bonn airport as Eurowings pilots go on a three-day strike, in Cologne, Germany, October, 17, 2022. REUTERS/Thilo Schmuelgen 

Aircrafts of Lufthansa's budget airline Eurowings stand on the tarmac of the Cologne-Bonn airport as Eurowings pilots go on a three-day strike, in Cologne, Germany, October, 17, 2022. REUTERS/Thilo Schmuelgen 

A view of Lufthansa's budget airline Eurowings logo, as their pilots go on a three-day strike, at Cologne-Bonn airport in Cologne, Germany, October 17, 2022. REUTERS/ Thilo Schmuelgen 

A passenger walks near Lufthansa's budget airline Eurowings empty check-in counters, as their pilots go on a three-day strike, at Cologne-Bonn airport in Cologne, Germany, October 17, 2022. REUTERS/ Thilo Schmuelgen 

Passengers walk near Lufthansa's budget airline Eurowings check-in counters as their pilots go on a three-day strike at Cologne-Bonn airport in Cologne, Germany, October 17, 2022. REUTERS/ Thilo Schmuelgen 

A passenger walks near Lufthansa's budget airline Eurowings check-in counters as their pilots go on a three-day strike at Cologne-Bonn airport in Cologne, Germany, October 17, 2022. REUTERS/ Thilo Schmuelgen 

Passengers line-up near Lufthansa's budget airline Eurowings check-in counters as their pilots go on a three-day strike at Cologne-Bonn airport in Cologne, Germany, October 17, 2022. REUTERS/ Thilo Schmuelgen 

A view of a time table showing cancelled flights as Eurowings pilots go on a three-day strike, in Cologne, Germany, October, 17, 2022. REUTERS/Thilo Schmuelgen 

A view of a time table showing cancelled flights as Eurowings pilots go on a three-day strike, in Cologne, Germany, October, 17, 2022. REUTERS/Thilo Schmuelgen 

A view of time tables showing cancelled flights as Eurowings pilots go on a three-day strike, in Cologne, Germany, October, 17, 2022. REUTERS/Thilo Schmuelgen 

A view of time tables showing cancelled flights as Eurowings pilots go on a three-day strike, in Cologne, Germany, October, 17, 2022. REUTERS/Thilo Schmuelgen 

An aircraft stands on the airfield as pilots at Lufthansa's budget airline Eurowings go on a one-day strike at Cologne-Bonn airport, Germany, October, 6, 2022. REUTERS/Benjamin Westhoff 

Passengers wait for check-in as pilots at Lufthansa's budget airline Eurowings go on a one-day strike at Cologne-Bonn airport, Germany, October, 6, 2022. REUTERS/Benjamin Westhoff 

Passengers wait for check-in as pilots at Lufthansa's budget airline Eurowings go on a one-day strike at Cologne-Bonn airport, Germany, October, 6, 2022. REUTERS/Benjamin Westhoff 

A display shows canceled flights as pilots at Lufthansa's budget airline Eurowings go on a one-day strike at Cologne-Bonn airport, Germany, October, 6, 2022. REUTERS/Benjamin Westhoff 

Passengers wait for check in as pilots at Lufthansa's budget airline Eurowings go on a one-day strike at Cologne-Bonn airport, Germany, October, 6, 2022. REUTERS/Benjamin Westhoff 

Passengers wait for check in as pilots at Lufthansa's budget airline Eurowings go on a one-day strike at Cologne-Bonn airport, Germany, October 6, 2022. REUTERS/Benjamin Westhoff 

Passengers look at a screen showing canceled flights as pilots at Lufthansa's budget airline Eurowings go on a one-day strike at Cologne-Bonn airport, Germany, October, 6, 2022. REUTERS/Benjamin Westhoff 

Passengers wait for check in as pilots at Lufthansa's budget airline Eurowings go on a one-day strike at Cologne-Bonn airport, Germany, October 6, 2022. REUTERS/Benjamin Westhoff 

Signs of German air carrier Lufthansa placed at their closed counters as Lufthansa pilots start a strike over a wage dispute, at the airport in Frankfurt), Germany, September 2, 2022. REUTERS/Kai Pfaffenbach 

A makeshift sign shows the way for first class passengers of German air carrier Lufthansa as Lufthansa pilots start a strike over a wage dispute, at the airport in Frankfurt, Germany September 2, 2022. REUTERS/Kai Pfaffenbach 

A flight schedule board shows cancelled flights of German air carrier Lufthansa as Lufthansa pilots start a strike over a wage dispute, at the airport in Frankfurt, Germany September 2, 2022. REUTERS/Kai Pfaffenbach 

A flight schedule board shows cancelled flights of German air carrier Lufthansa as Lufthansa pilots start a strike over a wage dispute, at the airport in Frankfurt, Germany September 2, 2022. REUTERS/Kai Pfaffenbach 

Planes of German air carrier Lufthansa are parked as Lufthansa pilots start a strike over a wage dispute, at the airport in Frankfurt, Germany September 2, 2022. REUTERS/Kai Pfaffenbach 

Planes of German air carrier Lufthansa are parked as Lufthansa pilots start a strike over a wage dispute, at the airport in Frankfurt, Germany September 2, 2022. REUTERS/Kai Pfaffenbach 

Passengers of German air carrier Lufthansa wait in front of rebooking counters as Lufthansa pilots start a strike over a wage dispute, at the airport in Frankfurt, Germany September 2, 2022. REUTERS/Kai Pfaffenbach 

Planes of German air carrier Lufthansa are parked as Lufthansa pilots start a strike over a wage dispute, at the airport in Frankfurt, Germany September 2, 2022. REUTERS/Kai Pfaffenbach 

Planes of German air carrier Lufthansa are parked as Lufthansa pilots start a strike over a wage dispute, at the airport in Frankfurt, Germany September 2, 2022. REUTERS/Kai Pfaffenbach 

Planes of German air carrier Lufthansa are parked as Lufthansa pilots start a strike over a wage dispute, at the airport in Frankfurt, Germany, September 2, 2022. REUTERS/Kai Pfaffenbach 

A flight schedule board shows cancelled flights of German air carrier Lufthansa as Lufthansa pilots start a strike over a wage dispute, at the airport in Frankfurt, Germany September 2, 2022. REUTERS/Kai Pfaffenbach 

Planes of German air carrier Lufthansa are parked as Lufthansa pilots start a strike over a wage dispute, at the airport in Frankfurt, Germany, September 2, 2022. REUTERS/Kai Pfaffenbach 

Planes of German air carrier Lufthansa are parked as Lufthansa pilots start a strike over a wage dispute, at the airport in Frankfurt, Germany, September 2, 2022. REUTERS/Kai Pfaffenbach 

Wizz Air's and Lufthansa's aircraft are seen on the tarmac at Ferenc Liszt International Airport in Budapest, Hungary, August 18, 2022. REUTERS/Bernadett Szabo 

Lufthansa ground staff of Frankfurt Airport stage a warning strike over 9.5 % pay claim by Germany's public sector workers union Verdi, prompting the cancellation of more than 1,000 flights and adding to travel disruptions during the busy summer travel season in Frankfurt, Germany, Juli 27, 2022. The move had prompted Lufthansa to cancel nearly all flights at its Frankfurt and Munich hubs for Wednesday. REUTERS/Frank Simon 

Lufthansa ground staff of Frankfurt Airport stage a warning strike over 9.5 % pay claim by Germany's public sector workers union Verdi, prompting the cancellation of more than 1,000 flights and adding to travel disruptions during the busy summer travel season in Frankfurt, Germany, Juli 27, 2022. The move had prompted Lufthansa to cancel nearly all flights at its Frankfurt and Munich hubs for Wednesday. REUTERS/Frank Simon 

Lufthansa ground staff of Frankfurt Airport stage a warning strike over 9.5 % pay claim by Germany's public sector workers union Verdi, prompting the cancellation of more than 1,000 flights and adding to travel disruptions during the busy summer travel season in Frankfurt, Germany, Juli 27, 2022. The move had prompted Lufthansa to cancel nearly all flights at its Frankfurt and Munich hubs for Wednesday. REUTERS/Frank Simon 

Lufthansa ground staff of Frankfurt Airport stage a warning strike over 9.5 % pay claim by Germany's public sector workers union Verdi, prompting the cancellation of more than 1,000 flights and adding to travel disruptions during the busy summer travel season in Frankfurt, Germany, Juli 27, 2022. The move had prompted Lufthansa to cancel nearly all flights at its Frankfurt and Munich hubs for Wednesday. REUTERS/Frank Simon 

Lufthansa ground staff of Frankfurt Airport stage a warning strike over 9.5 % pay claim by Germany's public sector workers union Verdi, prompting the cancellation of more than 1,000 flights and adding to travel disruptions during the busy summer travel season in Frankfurt, Germany, Juli 27, 2022. The move had prompted Lufthansa to cancel nearly all flights at its Frankfurt and Munich hubs for Wednesday. REUTERS/Frank Simon 

Nora and her daughter wait at Munich Airport after their flight with Lufthansa to Singapore was cancelled during a warning strike staged by Lufthansa ground staff over 9.5 % pay claim by Germany's public sector workers union Verdi in Munich, Germany July 27, 2022. REUTERS/Michaela Rehle 

Logo of Lufthansa is seen as passengers wait at Munich Airport during a warning strike staged by Lufthansa ground staff over 9.5 % pay claim by Germany's public sector workers union Verdi in Munich, Germany July 27, 2022. REUTERS/Michaela Rehle 

Logo of Lufthansa is seen on a board as passengers wait at Munich Airport during a warning strike staged by Lufthansa ground staff over 9.5 % pay claim by Germany's public sector workers union Verdi in Munich, Germany July 27, 2022. REUTERS/Michaela Rehle 

Passengers wait at Munich Airport during a warning strike staged by Lufthansa ground staff over 9.5 % pay claim by Germany's public sector workers union Verdi in Munich, Germany July 27, 2022. REUTERS/Michaela Rehle 

A passenger waits at Munich Airport during a warning strike staged by Lufthansa ground staff over 9.5 % pay claim by Germany's public sector workers union Verdi in Munich, Germany July 27, 2022. REUTERS/Michaela Rehle 

Passengers stand and walk near boards displaying cancelled fight departures at Munich Airport during a warning strike staged by Lufthansa ground staff over 9.5 % pay claim by Germany's public sector workers union Verdi in Munich, Germany July 27, 2022. REUTERS/Michaela Rehle TPX IMAGES OF THE DAY 

Lufthansa ground staff of Munich Airport stage a warning strike over 9.5 % pay claim by Germany's public sector workers union Verdi, in Munich, Germany July 27, 2022. REUTERS/Michaela Rehle 

A pilot drinks coffee at the Munich Airport during a warning strike staged by Lufthansa ground staff over 9.5 % pay claim by Germany's public sector workers union Verdi in Munich, Germany July 27, 2022. REUTERS/Michaela Rehle 

Lufthansa ground staff of Munich Airport stage a warning strike over 9.5 % pay claim by Germany's public sector workers union Verdi, in Munich, Germany July 27, 2022. REUTERS/Michaela Rehle 

Passengers stand and walk near boards displaying cancelled fight departures at Munich Airport during a warning strike staged by Lufthansa ground staff over 9.5 % pay claim by Germany's public sector workers union Verdi in Munich, Germany July 27, 2022. REUTERS/Michaela Rehle 

Passengers wait at Munich Airport during a warning strike staged by Lufthansa ground staff over 9.5 % pay claim by Germany's public sector workers union Verdi in Munich, Germany July 27, 2022. REUTERS/Michaela Rehle 

A view of Lufthansa planes at Munich Airport during a warning strike staged by Lufthansa ground staff over 9.5 % pay claim by Germany's public sector workers union Verdi in Munich, Germany July 27, 2022. REUTERS/Michaela Rehle 

A view of departure boards displaying cancelled flights at Munich Airport during a warning strike staged by Lufthansa ground staff over 9.5 % pay claim by Germany's public sector workers union Verdi in Munich, Germany July 27, 2022. REUTERS/Michaela Rehle 

A view of Lufthansa planes at Munich Airport during a warning strike staged by Lufthansa ground staff over 9.5 % pay claim by Germany's public sector workers union Verdi in Munich, Germany July 27, 2022. REUTERS/Michaela Rehle 

Passengers wait at Munich Airport during a warning strike staged by Lufthansa ground staff over 9.5 % pay claim by Germany's public sector workers union Verdi in Munich, Germany July 27, 2022. REUTERS/Michaela Rehle 

Passengers try to get another air ticket at the Munich Airport during a warning strike staged by Lufthansa ground staff over 9.5 % pay claim by Germany's public sector workers union Verdi in Munich, Germany July 27, 2022. REUTERS/Michaela Rehle 

A passenger pushes a trolley at Munich Airport during a warning strike staged by Lufthansa ground staff over 9.5 % pay claim by Germany's public sector workers union Verdi in Munich, Germany July 27, 2022. REUTERS/Michaela Rehle 

A view of departure boards displaying cancelled flights as passengers wait at Munich Airport during a warning strike staged by Lufthansa ground staff over 9.5 % pay claim by Germany's public sector workers union Verdi in Munich, Germany July 27, 2022. REUTERS/Michaela Rehle 

A view of departure boards displaying cancelled flights at Munich Airport during a warning strike staged by Lufthansa ground staff over 9.5 % pay claim by Germany's public sector workers union Verdi in Munich, Germany July 27, 2022. REUTERS/Michaela Rehle