A passenger wearing a face mask is seen at the Spirit airline check-in counter, after the Colombian government gave authorization to reactivate international flights, amidst the coronavirus disease (COVID-19) outbreak, in Bogota, Colombia September 21, 2020. REUTERS/Luisa Gonzalez

An employee of Spirit airline wearing a face mask asks a passenger for the passport, after the Colombian government gave the authorization to reactivate international flights, amidst the coronavirus disease (COVID-19) outbreak, in Bogota, Colombia September 21, 2020. REUTERS/Luisa Gonzalez

A departing Avianca Airlines flight is seen on the tarmac during the reopening ceremony at the Mons. Oscar Arnulfo Romero International Airport, as the spread of the coronavirus disease (COVID-19) continues, in San Luis Talpa, El Salvador September 19, 2020. Picture taken September 19. REUTERS/Jose Cabezas

An airport employee waves a Salvadoran flag in front of an Avianca Airlines aricraft before the reopening ceremony at the Mons. Oscar Arnulfo Romero International Airport, as the spread of the coronavirus disease (COVID-19) continues, in San Luis Talpa, El Salvador September 19, 2020. Picture taken September 19. REUTERS/Jose Cabezas

An Avianca Airlines representative takes a picture of a departing flight during the reopening ceremony at the Mons. Oscar Arnulfo Romero International Airport, as the spread of the coronavirus disease (COVID-19) continues, in San Luis Talpa, El Salvador September 19, 2020. Picture taken September 19. REUTERS/Jose Cabezas

Travellers are seen silhouetted at Beijing Daxing International Airport following the global outbreak of coronavirus disease (COVID-19), in Beijing, China September 19, 2020. REUTERS/Carlos Garcia Rawlins

Travellers wearing face masks walk at Beijing Daxing International Airport following the global outbreak of coronavirus disease (COVID-19), in Beijing, China September 19, 2020. REUTERS/Carlos Garcia Rawlins

Travellers wearing face masks walk at Beijing Daxing International Airport following the global outbreak of coronavirus disease (COVID-19), in Beijing, China September 19, 2020. REUTERS/Carlos Garcia Rawlins

Travellers wearing face masks walk at Beijing Daxing International Airport following the global outbreak of coronavirus disease (COVID-19), in Beijing, China September 19, 2020. REUTERS/Carlos Garcia Rawlins

Travellers wearing face masks wait at Beijing Daxing International Airport following the global outbreak of coronavirus disease (COVID-19), in Beijing, China September 19, 2020. REUTERS/Carlos Garcia Rawlins

A traveller wearing a face mask walks at Beijing Daxing International Airport following the global outbreak of coronavirus disease (COVID-19), in Beijing, China September 19, 2020. REUTERS/Carlos Garcia Rawlins

Travellers wearing face masks walk at Beijing Daxing International Airport following the global outbreak of coronavirus disease (COVID-19), in Beijing, China September 19, 2020. REUTERS/Carlos Garcia Rawlins

Travellers wearing face masks wait at Beijing Daxing International Airport following the global outbreak of coronavirus disease (COVID-19), in Beijing, China September 19, 2020. REUTERS/Carlos Garcia Rawlins

Travellers wearing face masks walk at Beijing Daxing International Airport following the global outbreak of coronavirus disease (COVID-19), in Beijing, China September 19, 2020. REUTERS/Carlos Garcia Rawlins

Travellers wearing face masks are seen at Beijing Daxing International Airport following the global outbreak of coronavirus disease (COVID-19), in Beijing, China September 19, 2020. REUTERS/Carlos Garcia Rawlins

U.S. House Speaker Nancy Pelosi (D-CA) speaks during a news conference on Capitol Hill in Washington, U.S., September 18, 2020. REUTERS/Al Drago

Demonstrators chant slogans as they protest outside the headquarters of South African Airways in Johannesburg, South Africa, September 18, 2020. REUTERS/Siphiwe Sibeko

Demonstrators dance and chant slogans as they protest outside the headquarters of South African Airways in Johannesburg, South Africa, September 18, 2020. REUTERS/Siphiwe Sibeko

A demonstrator holds a placard demanding funding and the protection of jobs as he protest outside the headquarters of South African Airways in Johannesburg, South Africa, September 18, 2020. REUTERS/Siphiwe Sibeko

Workers hold placards as they protest outside the headquarters of South African Airways in Johannesburg, South Africa, September 18, 2020. REUTERS/Siphiwe Sibeko

Standing with other airline executives, Southwest Airlines CEO Gary Kelly speaks to reporters after meeting with White House Chief of Staff Mark Meadows in Washington, U.S., September 17, 2020. REUTERS/Kevin Lamarque

American Airlines CEO Doug Parker wipes his brow as he and Southwest Airlines CEO Gary Kelly speak to reporters after meeting with White House Chief of Staff Mark Meadows in Washington, U.S., September 17, 2020. REUTERS/Kevin Lamarque

From left, American Airlines CEO Doug Parker, Southwest Airlines CEO Gary Kelly and Airlines for America CEO Nicholas Calio speak with reporters after meeting with White House Chief of Staff Mark Meadows in Washington, U.S., September 17, 2020. REUTERS/Kevin Lamarque

Flanked by other airline executives, American Airlines CEO Doug Parker speaks to reporters after meeting with White House Chief of Staff Mark Meadows in Washington, U.S., September 17, 2020. REUTERS/Kevin Lamarque

Flanked by other airline executives, American Airlines CEO Doug Parker speaks to reporters after meeting with White House Chief of Staff Mark Meadows in Washington, U.S., September 17, 2020. REUTERS/Kevin Lamarque

A child looks at an aircraft of S7 Airlines at the Tomsk Bogashevo Airport, from which Russian opposition leader Alexei Navalny departed in Tomsk Region, Russia September 15, 2020. Navalny, who met allies ahead of upcoming regional elections in Tomsk, fell ill with suspected poisoning en route to Moscow on a plane, which made an emergency landing in Omsk, and was later airlifted to Berlin for medical treatment. REUTERS/Maxim Shemetov

A view shows a registration desk of S7 Airlines in the terminal of the Tomsk Bogashevo Airport, from which Russian opposition leader Alexei Navalny departed in Tomsk Region, Russia September 15, 2020. Navalny, who met allies ahead of upcoming regional elections in Tomsk, fell ill with suspected poisoning en route to Moscow on a plane, which made an emergency landing in Omsk, and was later airlifted to Berlin for medical treatment. REUTERS/Maxim Shemetov

Members of the Swiss VPOD public services workers trade union display placards during a demonstration of workers in the aviation sector in front of Zurich Airport, Switzerland September 11, 2020. REUTERS/Arnd Wiegmann

Members of the Swiss VPOD public services workers trade union display a banner reading "Today protest - tomorrow strike?" during a demonstration of workers in the aviation sector in front of Zurich Airport, Switzerland September 11, 2020. REUTERS/Arnd Wiegmann

Members of the Swiss VPOD public services workers trade union are seen during a demonstration of workers in the aviation sector in front of Zurich Airport, Switzerland September 11, 2020. REUTERS/Arnd Wiegmann

Members of the Swiss VPOD public services workers trade union display placards and wave flags during a demonstration of workers in the aviation sector in front of Zurich Airport, Switzerland September 11, 2020. REUTERS/Arnd Wiegmann

A Goldhofer pushback tractor of air services provider Swissport stands in front of an Airbus A319-112 of Easy Jet at Zurich Airport, Switzerland September 11, 2020. REUTERS/Arnd Wiegmann

A Goldhofer pushback tractor of air services provider Swissport stands in front of an Airbus A319-112 of Easy Jet at Zurich Airport, Switzerland September 11, 2020. REUTERS/Arnd Wiegmann

President of the Swiss Trade Union Federation Pierre-Yves Maillard gives a speech during a demonstration of workers in the aviation sector in front of Zurich Airport, Switzerland September 11, 2020. REUTERS/Arnd Wiegmann

Protestors wear protective masks during a demonstration of workers in the aviation sector in front of Zurich Airport, Switzerland September 11, 2020. REUTERS/Arnd Wiegmann

A protestor wears a protective mask as she displays a placard during a demonstration of workers in the aviation sector in front of Zurich Airport, Switzerland September 11, 2020. REUTERS/Arnd Wiegmann

Protestors display a banner reading: "Stop social cuts" during a demonstration of workers in the aviation sector in front of Zurich Airport, Switzerland September 11, 2020. REUTERS/Arnd Wiegmann

An orange color haze from nearby wildfires blankets Santa Clara County, California as seen from a Southwest Airlines flight before its landing in Oakland, California, U.S., September 9, 2020. Picture taken September 9, 2020. REUTERS/Adrees Latif

A Southwest Airlines plane flies amid an orange color haze from nearby wildfires as it prepares to land at Oakland International Airport in Oakland, California, U.S., September 9, 2020. Picture taken September 9, 2020. REUTERS/Adrees Latif TPX IMAGES OF THE DAY

Pipe hangers sit at the construction site at Newark Terminal One, amid the coronavirus disease (COVID-19) pandemic, at Newark Liberty International Airport in Newark, New Jersey, U.S., September 8, 2020. REUTERS/Shannon Stapleton

A view of a construction site at the Newark Terminal One, amid the coronavirus disease (COVID-19) pandemic, at Newark Liberty International Airport in Newark, New Jersey, U.S., September 8, 2020. REUTERS/Shannon Stapleton

A view of a construction site at the Newark Terminal One, amid the coronavirus disease (COVID-19) pandemic, at Newark Liberty International Airport in Newark, New Jersey, U.S., September 8, 2020. REUTERS/Shannon Stapleton

A view of a construction site at the Newark Terminal One, amid the coronavirus disease (COVID-19) pandemic, at Newark Liberty International Airport in Newark, New Jersey, U.S., September 8, 2020. REUTERS/Shannon Stapleton

A view of a construction site at the Newark Terminal One, amid the coronavirus disease (COVID-19) pandemic, at Newark Liberty International Airport in Newark, New Jersey, U.S., September 8, 2020. REUTERS/Shannon Stapleton

Construction workers labor on the Newark Terminal One, amid the coronavirus disease (COVID-19) pandemic, at Newark Liberty International Airport in Newark, New Jersey, U.S., September 8, 2020. REUTERS/Shannon Stapleton

Pipe hangers sit at the construction site at Newark Terminal One, amid the coronavirus disease (COVID-19) pandemic, at Newark Liberty International Airport in Newark, New Jersey, U.S., September 8, 2020. REUTERS/Shannon Stapleton

A woman wearing a protective face mask walks down an escalator, amid the coronavirus disease (COVID-19) pandemic, at Newark Liberty International Airport in Newark, New Jersey, U.S., September 8, 2020. REUTERS/Shannon Stapleton

A construction worker labors on the Newark Terminal One, amid the coronavirus disease (COVID-19) pandemic, at Newark Liberty International Airport in Newark, New Jersey, U.S., September 8, 2020. REUTERS/Shannon Stapleton

A construction worker labors on the Newark Terminal One, amid the coronavirus disease (COVID-19) pandemic, at Newark Liberty International Airport in Newark, New Jersey, U.S., September 8, 2020. REUTERS/Shannon Stapleton

Fire engines spray water on an Ethiopian Airlines plane after its landing at the Nnamdi Azikiwe international airport in Abuja, Nigeria September 7, 2020. REUTERS/Afolabi Sotunde

An Ethiopian Airlines plane is see after landing at the Nnamdi Azikiwe international airport in Abuja, Nigeria September 7, 2020. REUTERS/Afolabi Sotunde.

Customers walk out of the Thai Airways pop-up airplane-themed restaurant at the airlines headquarters with onboard meals prepared by their chefs, while their fleet is still grounded at the airport and the company awaits a bankruptcy court decision, in Bangkok, Thailand September 3, 2020. REUTERS/Chalinee Thirasupa

A customer shows a "special boarding pass" needed to enter the Thai Airways pop-up airplane-themed restaurant at the airlines headquarters with onboard meals prepared by their chefs, while their fleet is still grounded at the airport and the company awaits a bankruptcy court decision, in Bangkok, Thailand September 3, 2020. REUTERS/Chalinee Thirasupa

Retired captain Varavut Chevavej works as a volunteer at a pop-up airplane-themed restaurant at the airlines headquarters with onboard meals prepared by their chefs while their fleet is still grounded at the airport and the company awaits a bankruptcy court decision in Bangkok, Thailand September 3, 2020. REUTERS/Chalinee Thirasupa

Usual onboard meals are pictured at a Thai Airways pop-up airplane-themed restaurant at the airlines headquarters while their fleet is still grounded at the airport and the company awaits a bankruptcy court decision, in Bangkok, Thailand September 3, 2020. REUTERS/Chalinee Thirasupa

A Thai Airways flight attendant Kotchamon Kongkerd and her co-worker say goodbye to a customer at a pop-up airplane-themed restaurant at the airlines headquarters with onboard meals prepared by their chefs, while their fleet is still grounded at the airport and the company awaits a bankruptcy court decision, in Bangkok, Thailand September 3, 2020. REUTERS/Chalinee Thirasupa

A customer poses for a picture with Thai Airways' flight attendants at a pop-up airplane-themed restaurant at the airlines headquarters with onboard meals prepared by their chefs, while their fleet is still grounded at the airport and the company awaits a bankruptcy court decision, in Bangkok, Thailand September 3, 2020. REUTERS/Chalinee Thirasupa

Thai Airways' staff welcome customers at a pop-up airplane-themed restaurant at the airlines headquarters with onboard meals prepared by their chefs, while their fleet is still grounded at the airport and the company awaits a bankruptcy court decision, in Bangkok, Thailand September 3, 2020. REUTERS/Chalinee Thirasupa

Customers sit at a Thai Airways pop-up airplane-themed restaurant at the airlines headquarters with onboard meals prepared by their chefs, while their fleet is still grounded at the airport and the company awaits a bankruptcy court decision, in Bangkok, Thailand September 3, 2020. REUTERS/Chalinee Thirasupa

Customers sit in a first class raw set for taking pictures only inside a Thai Airways pop-up airplane-themed restaurant at the airlines headquarters with onboard meals prepared by their chefs, while their fleet is still grounded at the airport and the company awaits a bankruptcy court decision, in Bangkok, Thailand September 3, 2020. REUTERS/Chalinee Thirasupa