Chief Executive Officer of Qatar Airways Akbar Al Baker attends an interview with Reuters at the St. Petersburg International Economic Forum (SPIEF) in Saint Petersburg, Russia, June 3, 2021. REUTERS/Ekaterina Golubkova

British Airways Airbus A320 aircraft takes off from Heathrow Airport in London, Britain, May 17, 2021. REUTERS/John Sibley

British Airways Airbus A319 aircraft takes off from Heathrow Airport in London, Britain, May 17, 2021. REUTERS/John Sibley

An Airbus A320 passenger plane of FlyArystan airline descends against the backdrop of the Tien Shan mountains before landing at an airport in the city of Almaty, Kazakhstan May 4, 2021. REUTERS/Pavel Mikheyev

A Government Flying Services (GFS) Airbus H175 helicopter takes part in an anti-terrorist drill during an open day to mark National Security Education Day, at Hong Kong Police College, in Hong Kong, China April 15, 2021. REUTERS/Tyrone Siu

Dassault Aviation Chairman and CEO Eric Trappier and Airbus Defence and Space Chief Executive Officer Dirk Hoke attend the signing contract for the Franco-German-Spanish Future Combat Air System (FCAS / SCAF), Europe's next-generation fighter jet, in Paris, France, February 20, 2020. REUTERS/Charles Platiau

An Air France Airbus A350 airplane lands at the Charles-de-Gaulle airport in Roissy, near Paris, France April 2, 2021. REUTERS/Christian Hartmann

An Air France Airbus A330 airplane lands at the Charles-de-Gaulle airport in Roissy, near Paris, France April 2, 2021. REUTERS/Christian Hartmann

An Air France Airbus A320 airplane takes-off at the Charles-de-Gaulle airport in Roissy, near Paris, France April 2, 2021. REUTERS/Christian Hartmann

An Air France Airbus A350 airplane lands at the Charles-de-Gaulle airport in Roissy, near Paris, France April 2, 2021. REUTERS/Christian Hartmann

An Air France Airbus A350 airplane lands at the Charles-de-Gaulle airport in Roissy, near Paris, France April 2, 2021. REUTERS/Christian Hartmann

The logo of Airbus is seen at the entrance of a building in Toulouse, France, March 11, 2021. REUTERS/Stephane Mahe

The logo of Airbus is seen at the entrance of a building in Toulouse, France, March 11, 2021. REUTERS/Stephane Mahe

The logo of Airbus is seen on a building in Toulouse, France, March 11, 2021. REUTERS/Stephane Mahe

The logo of Airbus is seen on a building in Toulouse, France, March 11, 2021. REUTERS/Stephane Mahe

Engineers and mechanics retrofit the interior of an Airbus A321 passenger plane into a freighter plane at an ST Engineering hangar in Singapore December 2, 2020. REUTERS/Edgar Su

View of the interior of a fully converted Airbus A321 freighter at an ST Engineering hangar in Singapore December 2, 2020. REUTERS/Edgar Su

Engineers and mechanics retrofit an Airbus A321 passenger plane into a freighter plane at an ST Engineering hangar in Singapore December 2, 2020. REUTERS/Edgar Su

Engineers and mechanics retrofit the interior of an Airbus A321 passenger plane into a freighter plane at an ST Engineering hangar in Singapore December 2, 2020. REUTERS/Edgar Su

A fully converted freighter Airbus A321 is pictured at an ST Engineering hangar in Singapore December 2, 2020. REUTERS/Edgar Su

A fully converted Airbus A321 freighter plane is pictured at an ST Engineering hangar in Singapore December 2, 2020. REUTERS/Edgar Su

An IAG Iberia's worker inspects an engine after transforming an Airbus 330 passenger aircraft into a cargo one to face the drop in flights due to the coronavirus pandemic at Iberia's maintenance hangar in Madrid, Spain, December 4, 2020. Picture taken December 4, 2020. REUTERS/Sergio Perez

IAG Iberia's workers set up a net to secure packages as they make the final touches after transforming an Airbus 330 passenger aircraft into a cargo one to face the drop in flights due to the coronavirus pandemic at Iberia's maintenance hangar in Madrid, Spain, December 4, 2020. Picture taken December 4, 2020. REUTERS/Sergio Perez

An IAG Iberia's workers install a piece in the tail after transforming an Airbus 330 passenger aircraft into a cargo one to face the drop in flights due to the coronavirus pandemic at Iberia's maintenance hangar in Madrid, Spain, December 4, 2020. Picture taken December 4, 2020. REUTERS/Sergio Perez

IAG Iberia's workers set up a net to secure packages as they make the final touches after transforming an Airbus 330 passenger aircraft into a cargo one to face the drop in flights due to the coronavirus pandemic at Iberia's maintenance hangar in Madrid, Spain, December 4, 2020. Picture taken December 4, 2020. REUTERS/Sergio Perez

An IAG Iberia's worker walks past nets after transforming an Airbus 330 passenger aircraft into a cargo one to face the drop in flights due to the coronavirus pandemic at Iberia's maintenance hangar in Madrid, Spain, December 4, 2020. Picture taken December 4, 2020. REUTERS/Sergio Perez

Passengers' seats are seen under an Iberia's Airbus 330 which was transformed from a passenger aircraft into a cargo one to face the drop in flights due to the coronavirus pandemic at Iberia's maintenance hangar in Madrid, Spain, December 4, 2020. Picture taken December 4, 2020. REUTERS/Sergio Perez

An IAG Iberia's worker inspects an engine after transformation of an Airbus 330 passenger aircraft into a cargo one to face the drop in flights due to the coronavirus pandemic at Iberia's maintenance hangar in Madrid, Spain, December 4, 2020. Picture taken December 4, 2020. REUTERS/Sergio Perez

An IAG Iberia's worker walks past an engine after transformation of an Airbus 330 passenger aircraft into a cargo one to face the drop in flights due to the coronavirus pandemic at Iberia's maintenance hangar in Madrid, Spain, December 4, 2020. Picture taken December 4, 2020. REUTERS/Sergio Perez

An Iberia's Airbus 330 plane is seen after being transformed from a passenger aircraft into a cargo one to face the drop in flights due to the coronavirus pandemic at Iberia's maintenance hangar in Madrid, Spain, December 4, 2020. Picture taken December 4, 2020. REUTERS/Sergio Perez

An Iberia's Airbus 330 plane is seen after being transformed from a passenger aircraft into a cargo one to face the drop in flights due to the coronavirus pandemic at Iberia's maintenance hangar in Madrid, Spain, December 4, 2020. Picture taken December 4, 2020. REUTERS/Sergio Perez

Passengers' seats are seen under an Iberia's Airbus 330 which was transformed from a passenger aircraft into a cargo one to face the drop in flights due to the coronavirus pandemic at Iberia's maintenance hangar in Madrid, Spain, December 4, 2020. Picture taken December 4, 2020. REUTERS/Sergio Perez

A Lufthansa Airbus A 340-300 aircraft is pictured at Frankfurt airport, Germany, November 27, 2020. REUTERS/Ralph Orlowski

A Lufthansa Airbus A 340-300 aircraft is pictured at Frankfurt airport, Germany, November 27, 2020. REUTERS/Ralph Orlowski

The cockpit is pictured onboard a Singapore Airlines Airbus A350 at the gate at JFK airport before a scheduled direct flight to Singapore in the Queens borough of New York City, New York, U.S., November 11, 2020. REUTERS/Carlo Allegri

Workers prepare a Singapore Airlines Airbus A350 at the gate at JFK airport before a scheduled direct flight to Singapore in the Queens borough of New York City, New York, U.S., November 11, 2020. REUTERS/Carlo Allegri

The cockpit is pictured onboard a Singapore Airlines Airbus A350 at the gate at JFK airport before a scheduled direct flight to Singapore in the Queens borough of New York City, New York, U.S., November 11, 2020. REUTERS/Carlo Allegri

Workers prepare a Singapore Airlines Airbus A350 at the gate at JFK airport before a scheduled direct flight to Singapore in the Queens borough of New York City, New York, U.S., November 11, 2020. REUTERS/Carlo Allegri

A Singapore Airlines flight attendant loads his bag in a overhead bin on an Airbus A350 at the gate at JFK airport before a scheduled direct flight to Singapore in the Queens borough of New York City, New York, U.S., November 11, 2020. REUTERS/Carlo Allegri

Workers prepare a Singapore Airlines Airbus A350 at the gate at JFK airport before a scheduled direct flight to Singapore in the Queens borough of New York City, New York, U.S., November 11, 2020. REUTERS/Carlo Allegri

James Boyd, VP of Public Relations for Singapore Airlines, helps to prepare an Airbus A350 at the gate at JFK airport before a scheduled direct flight to Singapore in the Queens borough of New York City, New York, U.S., November 11, 2020. REUTERS/Carlo Allegri

James Boyd, VP of Public Relations for Singapore Airlines, gives an interview aboard an Airbus A350 at the gate at JFK airport before a scheduled direct flight to Singapore in the Queens borough of New York City, New York, U.S., November 11, 2020. REUTERS/Carlo Allegri

Workers prepare a Singapore Airlines Airbus A350 at the gate at JFK airport before a scheduled direct flight to Singapore in the Queens borough of New York City, New York, U.S., November 11, 2020. REUTERS/Carlo Allegri

A logo is pictured on a seat of a Singapore Airlines Airbus A350 at the gate at JFK airport before a scheduled direct flight to Singapore in the Queens borough of New York City, New York, U.S., November 11, 2020. REUTERS/Carlo Allegri

A Singapore Airlines flight attendant boards an Airbus A350 at the gate at JFK airport before a scheduled direct flight to Singapore in the Queens borough of New York City, New York, U.S., November 11, 2020. REUTERS/Carlo Allegri REFILE - CORRECTING DESCRIPTION

The cabin is pictured onboard a Singapore Airlines Airbus A350 at the gate at JFK airport before a scheduled direct flight to Singapore in the Queens borough of New York City, New York, U.S., November 11, 2020. REUTERS/Carlo Allegri REFILE - CORRECTING DESCRIPTION

A seat is pictured onboard a Singapore Airlines Airbus A350 at the gate at JFK airport before a scheduled direct flight to Singapore in the Queens borough of New York City, New York, U.S., November 11, 2020. REUTERS/Carlo Allegri REFILE - CORRECTING DESCRIPTION

A Singapore Airlines flight attendant boards an Airbus A350 at the gate at JFK airport before a scheduled direct flight to Singapore in the Queens borough of New York City, New York, U.S., November 11, 2020. REUTERS/Carlo Allegri

Workers prepare a Singapore Airlines Airbus A350 at the gate at JFK airport before a scheduled direct flight to Singapore in the Queens borough of New York City, New York, U.S., November 11, 2020. REUTERS/Carlo Allegri REFILE - CORRECTING DESCRIPTION

The first class cabin is pictured onboard a Singapore Airlines Airbus A350 at the gate at JFK airport before a scheduled direct flight to Singapore in the Queens borough of New York City, New York, U.S., November 11, 2020. REUTERS/Carlo Allegri

A man photographs a Singapore Airlines Airbus A350 aircraft at the gate at JFK airport in the Queens borough of New York City, New York, U.S., November 11, 2020. REUTERS/Carlo Allegri

A Singapore Airlines Airbus A350 aircraft is pictured at the gate at JFK airport in the Queens borough of New York City, New York, U.S., November 11, 2020. REUTERS/Carlo Allegri

A Singapore Airlines Airbus A350 aircraft is pictured at the gate at JFK airport in the Queens borough of New York City, New York, U.S., November 11, 2020. REUTERS/Carlo Allegri

A China Southern Airlines Airbus A380-800 plane takes off from Sydney Airport in Sydney, Australia, October 28, 2020. REUTERS/Loren Elliott

A Delta Air Lines Airbus A350-900 plane takes off from Sydney Airport in Sydney, Australia, October 28, 2020. REUTERS/Loren Elliott

View of an airBaltic Airbus A220 wing during a "flight to nowhere" over Latvia, October 25, 2020. Latvian travel agency Balt Go organized flight Riga-Riga for those who miss travel and the flying experience. Picture taken October 25, 2020. REUTERS/Janis Laizans

View of an airBaltic Airbus A220 wing during a "flight to nowhere" over Latvia, October 25, 2020. Latvian travel agency Balt Go organized flight Riga-Riga for those who miss travel and the flying experience. Picture taken October 25, 2020. REUTERS/Janis Laizans

Wing of an airBaltic Airbus A220 is seen as a passenger holds a phone during a "flight to nowhere" over Latvia, October 25, 2020. Latvian travel agency Balt Go organized flight Riga-Riga for those who miss travel and the flying experience. Picture taken October 25, 2020. REUTERS/Janis Laizans

A Singapore Airlines Airbus A350-900 plane undergoes maintenance at Changi Airport in Singapore October 24, 2020. REUTERS/Edgar Su

A French Air Force Airbus A400M performs during a presentation of the French Air and Space Army at the BA 105 Evreux-Fauville Air Force Base, France, October 15, 2020. REUTERS/Gonzalo Fuentes