(L-R) Aer Lingus CEO Lynne Embleton, Lufthansa CEO Carsten Spohr, United Airlines CEO Scott Kirby and Emirates airline President Tim Clark wait to take the stage for a panel discussion at the International Air Transport Association's (IATA) Annual General Meeting in Boston, Massachusetts, U.S., October 4, 2021. REUTERS/Brian Snyder

Lufthansa CEO Carsten Spohr takes part in a panel discussion at the International Air Transport Association's (IATA) Annual General Meeting in Boston, Massachusetts, U.S., October 4, 2021. REUTERS/Brian Snyder

Lufthansa CEO Carsten Spohr takes part in a panel discussion at the International Air Transport Association's (IATA) Annual General Meeting in Boston, Massachusetts, U.S., October 4, 2021. REUTERS/Brian Snyder

Lufthansa CEO Carsten Spohr takes part in a panel discussion at the International Air Transport Association's (IATA) Annual General Meeting in Boston, Massachusetts, U.S., October 4, 2021. REUTERS/Brian Snyder

Lufthansa CEO Carsten Spohr takes part in a panel discussion at the International Air Transport Association's (IATA) Annual General Meeting in Boston, Massachusetts, U.S., October 4, 2021. REUTERS/Brian Snyder

Lufthansa CEO Carsten Spohr speaks to reporters at the International Air Transport Association's Annual General Meeting in Boston, Massachusetts, U.S., October 3, 2021. REUTERS/Brian Snyder

Lufthansa CEO Carsten Spohr speaks to reporters at the International Air Transport Association's Annual General Meeting in Boston, Massachusetts, U.S., October 3, 2021. REUTERS/Brian Snyder

Lufthansa CEO Carsten Spohr speaks to reporters at the International Air Transport Association's Annual General Meeting in Boston, Massachusetts, U.S., October 3, 2021. REUTERS/Brian Snyder

A couple embraces a man after he disembarked from a Lufthansa plane transporting evacuees from Kabul, Afghanistan, at the airport in Frankfurt, Germany August 18, 2021. REUTERS/Thilo Schmuelgen

A woman is seen at the airport terminal, after leaving a Lufthansa plane transporting evacuees from Kabul, Afghanistan, at the airport in Frankfurt, Germany August 18, 2021. REUTERS/Thilo Schmuelgen

A family of German citizens walk with their bags in the airport terminal upon arrival at Frankfurt Airport, Germany, August 18, 2021, after being evacuated from Kabul, Afghanistan. REUTERS/Thilo Schmuelgen

A German family talks to members of the media upon arrival at Frankfurt Airport, Germany, August 18, 2021, after being evacuated from Kabul, Afghanistan. REUTERS/Thilo Schmuelgen

A German family talks to members of the media upon arrival at Frankfurt Airport, Germany, August 18, 2021, after being evacuated from Kabul, Afghanistan. REUTERS/Thilo Schmuelgen

A family of German citizens walk with their bags upon arrival at Frankfurt Airport, Germany, August 18, 2021, after being evacuated from Kabul, Afghanistan. REUTERS/Thilo Schmuelgen

A stuffed toy hangs from the bag of a boy standing next to his family upon arrival at Frankfurt Airport, Germany, August 18, 2021, after they were evacuated from Kabul, Afghanistan. REUTERS/Thilo Schmuelgen

A family walks with their bags upon arrival at Frankfurt Airport, Germany, August 18, 2021, after being evacuated from Kabul, Afghanistan. REUTERS/Thilo Schmuelgen

A family walks with their bags upon arrival at Frankfurt Airport, Germany, August 18, 2021, after being evacuated from Kabul, Afghanistan. REUTERS/Thilo Schmuelgen

People embrace after disembarking a Lufthansa plane transporting evacuees from Kabul, Afghanistan, at the airport in Frankfurt, Germany August 18, 2021. REUTERS/Thilo Schmuelgen

A woman looks on at the airport terminal, after leaving a Lufthansa plane transporting evacuees from Kabul, Afghanistan, at the airport in Frankfurt, Germany August 18, 2021. REUTERS/Thilo Schmuelgen

People embrace after disembarking a Lufthansa plane transporting evacuees from Kabul, Afghanistan, at the airport in Frankfurt, Germany August 18, 2021. REUTERS/Thilo Schmuelgen

A Lufthansa plane carrying people who have being evacuated from Kabul, Afghanistan lands in Frankfurt, Germany August 18, 2021. REUTERS/Thilo Schmuelgen

A Lufthansa plane carrying people who have being evacuated from Kabul, Afghanistan lands in Frankfurt, Germany August 18, 2021. REUTERS/Thilo Schmuelgen

A Lufthansa plane carrying people who have being evacuated from Kabul, Afghanistan comes in for landing along an airport runway in Frankfurt, Germany August 18, 2021. REUTERS/Thilo Schmuelgen

A Lufthansa plane carrying people who have being evacuated from Kabul, Afghanistan is seen on the airport tarmac in Frankfurt, Germany August 18, 2021. REUTERS/Thilo Schmuelgen

A Lufthansa plane carrying people who have being evacuated from Kabul, Afghanistan lands on an airport runway in Frankfurt, Germany August 18, 2021. REUTERS/Thilo Schmuelgen

A Lufthansa plane carrying people who have being evacuated from Kabul, Afghanistan lands on an airport runway in Frankfurt, Germany August 18, 2021. REUTERS/Thilo Schmuelgen

A Lufthansa plane carrying people who have being evacuated from Kabul, Afghanistan lands on an airport runway in Frankfurt, Germany August 18, 2021. REUTERS/Thilo Schmuelgen

A Lufthansa plane carrying people who have being evacuated from Kabul, Afghanistan lands on an airport runway in Frankfurt, Germany August 18, 2021. REUTERS/Thilo Schmuelgen

A plane carrying people who have being evacuated from Kabul, Afghanistan lands on an airport runway in Frankfurt, Germany August 18, 2021. REUTERS/Thilo Schmuelgen

A plane carrying people who have being evacuated from Kabul is seen on the tarmac after it landed in Frankfurt, Germany August 18, 2021. REUTERS/Thilo Schmuelgen

A Lufthansa aircraft parks at Munich airport in Munich, Germany, June 27, 2021. Picture taken June 27, 2021. REUTERS/Marika Kochiashvili

A Lufthansa aircraft parks at Munich airport in Munich, Germany, June 27, 2021. Picture taken June 27, 2021. REUTERS/Marika Kochiashvili

German Transport Minister Andreas Scheuer and Lufthansa CEO Carsten Spohr pose in front of an Airbus A 320neo during a high level conference of the air traffic industry to discuss air travel in the coronavirus pandemic and the path to sustainable flying at the BER Airport in Berlin Schoenefeld, Germany, June 18, 2021. Soeren Stache/Pool via REUTERS

German Transport Minister Andreas Scheuer and Lufthansa CEO Carsten Spohr pose in front of an engine of an Airbus A 320neo during a high level conference of the air traffic industry to discuss air travel in the coronavirus pandemic and the path to sustainable flying at the BER Airport in Berlin Schoenefeld, Germany, June 18, 2021. Soeren Stache/Pool via REUTERS

German Transport Minister Andreas Scheuer and Lufthansa CEO Carsten Spohr pose in front of an engine of an Airbus A 320neo during a high level conference of the air traffic industry to discuss air travel in the coronavirus pandemic and the path to sustainable flying at the BER Airport in Berlin Schoenefeld, Germany, June 18, 2021. Soeren Stache/Pool via REUTERS

German Transport Minister Andreas Scheuer and Lufthansa CEO Carsten Spohr pose on board of an Airbus A 320neo during a high level conference of the air traffic industry to discuss air travel in the coronavirus pandemic and the path to sustainable flying at the BER Airport in Berlin Schoenefeld, Germany, June 18, 2021. Soeren Stache/Pool via REUTERS

German Transport Minister Andreas Scheuer and Lufthansa CEO Carsten Spohr pose on board of an Airbus A 320neo during a high level conference of the air traffic industry to discuss air travel in the coronavirus pandemic and the path to sustainable flying at the BER Airport in Berlin Schoenefeld, Germany, June 18, 2021. Soeren Stache/Pool via REUTERS

German Transport Minister Andreas Scheuer and Lufthansa CEO Carsten Spohr pose on board of an Airbus A 320neo during a high level conference of the air traffic industry to discuss air travel in the coronavirus pandemic and the path to sustainable flying at the BER Airport in Berlin Schoenefeld, Germany, June 18, 2021. Soeren Stache/Pool via REUTERS

German Transport Minister Andreas Scheuer and Lufthansa CEO Carsten Spohr pose on board of an Airbus A 320neo during a high level conference of the air traffic industry to discuss air travel in the coronavirus pandemic and the path to sustainable flying at the BER Airport in Berlin Schoenefeld, Germany, June 18, 2021. Soeren Stache/Pool via REUTERS

German air carrier Lufthansa's logo is seen near a terminal on the day of the airline's annual general meeting at the airport in Frankfurt, Germany, May 4, 2021. REUTERS/Kai Pfaffenbach

A passenger follows signs towards German air carrier Lufthansa's service center on the day of the airline's annual general meeting at the airport in Frankfurt, Germany, May 4, 2021. REUTERS/Kai Pfaffenbach

An emergency exit sign is seen next to closed counters of German air carrier Lufthansa on the day of the airline's annual general meeting at the airport in Frankfurt, Germany, May 4, 2021. REUTERS/Kai Pfaffenbach

Passengers follow signs towards German air carrier Lufthansa's service center on the day of the airline's annual general meeting at the airport in Frankfurt, Germany, May 4, 2021. REUTERS/Kai Pfaffenbach

A shut-down first class counter of German air carrier Lufthansa is photographed on the day of the airline's annual general meeting at the airport in Frankfurt, Germany, May 4, 2021. REUTERS/Kai Pfaffenbach

A shut-down first class counter of German air carrier Lufthansa is photographed on the day of the airline's annual general meeting at the airport in Frankfurt, Germany, May 4, 2021. REUTERS/Kai Pfaffenbach

A flag of German air carrier Lufthansa flutters in the wind on the day of the airline's annual general meeting at the airport in Frankfurt, Germany, May 4, 2021. REUTERS/Kai Pfaffenbach

A flag of German air carrier Lufthansa flutters in the wind on the day of the airline's annual general meeting at the airport in Frankfurt, Germany, May 4, 2021. REUTERS/Kai Pfaffenbach

Passengers come and go to a German air carrier Lufthansa's service center on the day of the airline's annual general meeting at the airport in Frankfurt, Germany, May 4, 2021. REUTERS/Kai Pfaffenbach

A passenger wears a PPE (personal protection equipment) suit as she walks through the terminal of German air carrier Lufthansa on the day of the airline's annual general meeting at the airport in Frankfurt, Germany, May 4, 2021. REUTERS/Kai Pfaffenbach

Planes of German air carrier Lufthansa are photographed at the day of the airline's annual general meeting at the airport in Frankfurt, Germany, May 4, 2021. REUTERS/Kai Pfaffenbach

The Lufthansa Logo is seen during the media tour at the former Berlin Tegel airport during the last day before the end of operation in Berlin, Germany, May 4, 2021. REUTERS/Michele Tantussi

Passengers queue at Lufthansa check-in desk in the Frankfurt airport, amid the outbreak of the coronavirus disease (COVID-19), in Frankfurt, Germany, March 29, 2021. REUTERS/Kai Pfaffenbach

An employee of Lufthansa fills an ultra-low temperature container with dry ice at the Lufthansa pharma hub at Frankfurt airport, Germany, November 27, 2020. REUTERS/Ralph Orlowski

An employee of Lufthansa fills an ultra-low temperature container with dry ice at the Lufthansa pharma hub at Frankfurt airport, Germany, November 27, 2020. REUTERS/Ralph Orlowski

A forklift drives through the Lufthansa pharma hub at Frankfurt airport, Germany, November 27, 2020. REUTERS/Ralph Orlowski

A forklift drives through the Lufthansa pharma hub at Frankfurt airport, Germany, November 27, 2020. REUTERS/Ralph Orlowski

A Lufthansa CO2-neutral Boeing 777 cargo aircraft, operated with sustainable aviation fuel (SAF), is refueled at Frankfurt airport, Germany, November 27, 2020. REUTERS/Ralph Orlowski

Peter Gerber, CEO of Lufthansa Cargo AG attends the presentation of a Lufthansa CO2-neutral Boeing 777 cargo aircraft, operated with sustainable aviation fuel (SAF), at Frankfurt airport, Germany, November 27, 2020. REUTERS/Ralph Orlowski

Peter Gerber, CEO of Lufthansa Cargo AG attends the presentation of a Lufthansa CO2-neutral Boeing 777 cargo aircraft, operated with sustainable aviation fuel (SAF), at Frankfurt airport, Germany, November 27, 2020. REUTERS/Ralph Orlowski

Jochen Thewes, CEO of DB Schenker AG attends the presentation of a Lufthansa CO2-neutral Boeing 777 cargo aircraft, operated with sustainable aviation fuel (SAF), at Frankfurt airport, Germany, November 27, 2020. REUTERS/Ralph Orlowski