People make their way to their departure gate during a winter storm at Toronto Pearson International Airport in Mississauga, Ontario, Canada December 23, 2022. REUTERS/Carlos Osorio 

People walk past the departure gate at Taoyuan International Airport in Taoyuan, Taiwan, August 4, 2022. REUTERS/Ann Wang 

A woman walks towards the departure gate at Taoyuan International Airport in Taoyuan City, Taiwan, August 4, 2022. REUTERS/Ann Wang 

Passengers walk to departure gates in an area for Olympics travellers at Beijing Capital International Airport, as the coronavirus disease (COVID-19) pandemic continues, during the Beijing 2022 Winter Olympics in Beijing, China, February 19, 2022. REUTERS/Toby Melville 

An airport staff member is seen at the departure gate of the international flight terminal at Tokyo International Airport, commonly know as Haneda airport, amid the coronavirus disease (COVID-19) outbreak, in Tokyo, Japan December 28, 2020. REUTERS/Issei Kato 

An empty site of the departure gate for the international flights is seen at Taipei Songshan Airport in Taipei, Taiwan, June 8, 2020.REUTERS/Ann Wang 

A passenger passes the departure gate as he is boarding a flight to United States at Guarulhos International Airport amid the outbreak of the coronavirus disease (COVID-19), in Guarulhos, near Sao Paulo, Brazil, May 25, 2020. REUTERS/Amanda Perobelli 

A staff of All Nippon Airways (ANA) wearing a visor stands in front of a gate at an almost empty departure terminal of Haneda Airport, where fewer people than usual are seen during Golden Week holidays following the coronavirus disease (COVID-19) outbreak, in Tokyo, Japan April 29, 2020. REUTERS/Kim Kyung-Hoon 

Closed gates and departure halls are seen, as Schiphol Airport reduces its flights due to the coronavirus disease (COVID-19) outbreak, in Amsterdam, Netherlands April 2, 2020. REUTERS/Piroschka van de Wouw 

Closed gates and departure halls are seen, as Schiphol Airport reduces its flights due to the coronavirus disease (COVID-19) outbreak, in Amsterdam, Netherlands April 2, 2020. REUTERS/Piroschka van de Wouw 

Closed gates and departure halls are seen, as Schiphol Airport reduces its flights due to the coronavirus disease (COVID-19) outbreak, in Amsterdam, Netherlands April 2, 2020. REUTERS/Piroschka van de Wouw 

Closed gates and departure halls are seen, as Schiphol Airport reduces its flights due to the coronavirus disease (COVID-19) outbreak, in Amsterdam, Netherlands April 2, 2020. REUTERS/Piroschka van de Wouw 

Closed gates and departure halls are seen, as Schiphol Airport reduces its flights due to the coronavirus disease (COVID-19) outbreak, in Amsterdam, Netherlands April 2, 2020. REUTERS/Piroschka van de Wouw 

A police officer stands guard at the closed departure terminal gate at Blaise Diagne International Airport amid the outbreak of the coronavirus disease (COVID-19), in Thies, Senegal, March 28, 2020. REUTERS/Zohra Bensemra 

Empty departure gates are seen at Erbil International Airport, after Iraq has suspended flights at its domestic airports due to the outbreak of the coronavirus disease (COVID-19), in Erbil, Iraq March 17, 2020. REUTERS/Azad Lashkari 

Travellers wearing masks arrive walk near the United States departure gate at Pearson airport, amid growing global numbers of coronavirus cases, in Toronto, Ontario, Canada March 15, 2020. REUTERS/Chris Helgren 

Officials wearing protective face masks, following an outbreak of the coronavirus disease (COVID-19), are seen at empty departure gates at Haneda Airport in Tokyo, Japan, March 14, 2020. REUTERS/Athit Perawongmetha 

Airport officers stand at the entrance gate of international departures terminal of Soekarno-Hatta Airport near Jakarta, amid the coronavirus disease (COVID-19) outbreak, Indonesia, March 13, 2020. REUTERS/Willy Kurniawan 

A woman walks near an empty departures gate at Haneda Airport in Tokyo, Japan, March 9, 2020. REUTERS/Stoyan Nenov 

A woman walks near an empty departures gate at Haneda Airport in Tokyo, Japan, March 9, 2020. REUTERS/Stoyan Nenov 

An empty departures gate is pictured at Haneda Airport in Tokyo, Japan, March 4, 2020. REUTERS/Stoyan Nenov 

A placard reading "Sorry..." is displayed on the barricade blocking the access to the departure gates, during an anti-government demonstration at Hong Kong International Airport, China August 13, 2019. REUTERS/Thomas Peter 

A placard reading "Sorry..." is displayed on the barricade blocking the access to the departure gates, during an anti-government demonstration at Hong Kong International Airport, China August 13, 2019. REUTERS/Thomas Peter 

Passengers walk past anti-government protesters blocking the access to the departure gates, during a demonstration at Hong Kong International Airport, China August 13, 2019. REUTERS/Thomas Peter 

Anti-government protesters block the access to the departure gates, during a demonstration at Hong Kong Airport, China August 13, 2019. REUTERS/Thomas Peter 

Anti-government protesters try to prevent a passenger from breaching a barricade in front of departure gates, during a demonstration at Hong Kong Airport, China August 13, 2019. REUTERS/Thomas Peter 

Anti-government protesters try to prevent a passenger from breaching a barricade in front of departure gates, during a demonstration at Hong Kong Airport, China August 13, 2019. REUTERS/Thomas Peter 

Anti-government protesters try to prevent a passenger from breaching a barricade in front of departure gates, during a demonstration at Hong Kong Airport, China August 13, 2019. REUTERS/Thomas Peter 

Passengers wait in front of closed security gates as anti-extradition bill demonstrators protest at the departure hall of Hong Kong Airport, China August 12, 2019. REUTERS/Issei Kato 

Passengers wait at the departure gate of Hong Kong airport as anti-extradition bill protesters occupy the floor, in Hong Kong, China August 12, 2019. REUTERS/Thomas Peter 

Passengers arrive at the departure gate as anti-extradition bill protesters rally at of Hong Kong airport in Hong Kong, China August 12, 2019. REUTERS/Thomas Peter 

People are seen next to the temporary closed security gates as anti-extradition bill demonstrators protest at the departure hall of Hong Kong Airport, China August 12, 2019. REUTERS/Issei Kato 

A United Airlines Boeing 737-900ER "Flight for the Planet" is refueled at a gate before the departure from O'Hare International Airport to Los Angeles in Chicago, Illinois, U.S., June 5, 2019. REUTERS/Kamil Krzaczynski 

United Airlines Boeing 737-900ER "Flight for the Planet", the most eco-friendly commercial flight in history of aviation, according to the airline, is being refueled at a gate before the departure from O'Hare International Airport to Los Angeles, in Chicago, Illinois, U.S., June 5, 2019. REUTERS/Kamil Krzaczynski 

United Airlines Boeing 737-900ER "Flight for the Planet", the most eco-friendly commercial flight in history of aviation, according to the airline, sits at a gate before the departure from O'Hare International Airport to Los Angeles, in Chicago, Illinois, U.S., June 5, 2019. REUTERS/Kamil Krzaczynski 

United Airlines Boeing 737-900ER "Flight for the Planet", the most eco-friendly commercial flight in history of aviation, according to the airline, is being refueled at a gate before the departure from O'Hare International Airport to Los Angeles, in Chicago, Illinois, U.S., June 5, 2019. REUTERS/Kamil Krzaczynski 

United Airlines Boeing 737-900ER "Flight for the Planet", the most eco-friendly commercial flight in history of aviation, according to the airline, sits at a gate before the departure from O'Hare International Airport to Los Angeles, in Chicago, Illinois, U.S., June 5, 2019. REUTERS/Kamil Krzaczynski 

United Airlines Boeing 737-900ER "Flight for the Planet", the most eco-friendly commercial flight in history of aviation, according to the airline, is being refueled at a gate before the departure from O'Hare International Airport to Los Angeles, in Chicago, Illinois, U.S., June 5, 2019. REUTERS/Kamil Krzaczynski 

United Airlines Boeing 737-900ER "Flight for the Planet", the most eco-friendly commercial flight in history of aviation, according to the airline, sits at a gate before the departure from O'Hare International Airport to Los Angeles, in Chicago, Illinois, U.S., June 5, 2019. REUTERS/Kamil Krzaczynski 

A Deltas Airlines plane sits parked at a departure gate at Hartsfield-Jackson International Airport in Atlanta, Georgia, U.S., April 15, 2019. REUTERS/Mike Blake 

A departure gate is shown for Delta Airlines at Hartsfield-Jackson International Airport in Atlanta, Georgia, U.S., April 15, 2019. REUTERS/Mike Blake 

Empty seats are shown at a Delta Airlines departure gate at Hartsfield-Jackson International Airport in Atlanta, Georgia, U.S., April 15, 2019. REUTERS/Mike Blake 

Empty seats are shown at a Delta Airlines departure gate at Hartsfield-Jackson International Airport in Atlanta, Georgia, U.S., April 15, 2019. REUTERS/Mike Blake 

Departure gate is seen empty during a wider European strike at the airline to protest slow progress in negotiating a collective labour agreement, at Brussels South Charleroi Airport, Belgium September 28, 2018. REUTERS/Yves Herman 

A stranded passenger walks past the closed departure gate of Weeze airport near the German-Dutch border during a wider European strike of Ryanair airline crews to protest slow progress in negotiating a collective labour agreement at Weeze airport, Germany, September 28, 2018. REUTERS/Wolfgang Rattay 

Stranded passengers walk past the closed departure gate of the Weeze airport near the German-Dutch border during a wider European strike of Ryanair airline crews to protest slow progress in negotiating a collective labour agreement at Weeze airport, Germany, September 28, 2018. REUTERS/Wolfgang Rattay 

The departure gate of Weeze Airport near the German-Dutch border is seen empty during a strike of Ryanair airline crews protesting the slow progress in negotiating a collective labour agreement in Weeze, Germany, September 12, 2018. REUTERS/Wolfgang Rattay 

The departure gate of Weeze Airport near the German-Dutch border is seen empty during a strike of Ryanair airline crews protesting the slow progress in negotiating a collective labour agreement in Weeze, Germany, September 12, 2018. REUTERS/Wolfgang Rattay 

The departure gate of Weeze Airport near the German-Dutch border is seen empty during a strike of Ryanair airline crews protesting the slow progress in negotiating a collective labour agreement in Weeze, Germany, September 12, 2018. REUTERS/Wolfgang Rattay? 

The departure gate of Weeze Airport near the German-Dutch border is seen empty during a strike of Ryanair airline crews protesting the slow progress in negotiating a collective labour agreement in Weeze, Germany, September 12, 2018. REUTERS/Wolfgang Rattay 

The departure gate of the Weeze airport near the German-Dutch border is completely shut down during a wider European strike of Ryanair airline crews to protest slow progress in negotiating a collective labour agreement at Weeze airport, Germany August 10, 2018. REUTERS/Wolfgang Rattay 

The departure gate of the Weeze airport near the German-Dutch border is completely shut down during a wider European strike of Ryanair airline crews to protest slow progress in negotiating a collective labour agreement at Weeze airport, Germany August 10, 2018. REUTERS/Wolfgang Rattay 

The departure gate of the Weeze airport near the German-Dutch border is completely shut down during a wider European strike of Ryanair airline crews to protest slow progress in negotiating a collective labour agreement at Weeze airport, Germany August 10, 2018. REUTERS/Wolfgang Rattay 

The departure gate of the Weeze airport near the German-Dutch border is completely shut down during a wider European strike of Ryanair airline crews to protest slow progress in negotiating a collective labour agreement at Weeze airport, Germany August 10, 2018. REUTERS/Wolfgang Rattay 

Alejandra Juarez walks with her two daughters, Pamela, 16, and Estela, 9, and her husband, former U.S. Marine Temo Juarez, all U.S. citizens, to the departure gates at Orlando International Airport for her deportation flight to Mexico, in Orlando, Florida, U.S., August 3, 2018. REUTERS/Joey Roulette 

Passengers wait for the flight at a departure gate in Ho Chi Minh airport October 28, 2017. REUTERS/Thomas White 

Passengers walk with their luggage towards departure gates at Sydney International Airport in Australia, October 25, 2017. Picture taken October 25, 2017. REUTERS/Steven Saphore 

Passengers walk with their luggage towards departure gates at Sydney International Airport in Australia, October 25, 2017. Picture taken October 25, 2017. REUTERS/Steven Saphore 

Departing passengers wait to board their flight at the departure gates at Malta International Airport in Luqa, Malta August 2, 2017. REUTERS/Darrin Zammit Lupi 

Signage pointing to the departure gates and VIP lounge is seen in a Duty Free store at Malta International Airport in Luqa, Malta August 2, 2017. REUTERS/Darrin Zammit Lupi