A Volaris Costa Rica Airbus A319-100 aircraft takes-off from Juan Santamaria Airport after FAA said it had found Costa Rica does not comply with International Civil Aviation Organization safety standards and reduced its rating to Category 2, in Alajuela, Costa Rica May 14, 2019. REUTERS/Juan Carlos Ulate

An Airbus A320neo passenger aircraft of Mexican low-cost air carrier Volaris is pictured on the tarmac in Colomiers near Toulouse, France, July 10, 2018. REUTERS/Regis Duvignau

A crack is seen in a road in the Leilani Estates subdivision during ongoing eruptions of the Kilauea Volcano in Hawaii, U.S., May 13, 2018. REUTERS/Terray Sylvester

A lava flow covers a road in the Leilani Estates subdivision during ongoing eruptions of the Kilauea Volcano in Hawaii, U.S., May 13, 2018. REUTERS/Terray Sylvester

Enrique Beltranena, Chief Executive Officer of Mexican low-cost airline Volaris, speaks during an interview with Reuters in Mexico City, Mexico January 15, 2018. REUTERS/Daniel Becerril

Enrique Beltranena, Chief Executive Officer of Mexican low-cost airline Volaris, speaks during an interview with Reuters in Mexico City, Mexico January 15, 2018. REUTERS/Daniel Becerril

Enrique Beltranena, Chief Executive Officer of Mexican low-cost airline Volaris, looks on during an interview with Reuters in Mexico City, Mexico January 15, 2018. REUTERS/Daniel Becerril

Enrique Beltranena, Chief Executive Officer of Mexican low-cost airline Volaris, looks on during an interview with Reuters in Mexico City, Mexico January 15, 2018. REUTERS/Daniel Becerril

Enrique Beltranena, Chief Executive Officer of Mexican low-cost airline Volaris, speaks during an interview with Reuters in Mexico City, Mexico January 15, 2018. REUTERS/Daniel Becerril

Enrique Beltranena, Chief Executive Officer of Mexican low-cost airline Volaris, speaks during an interview with Reuters in Mexico City, Mexico January 15, 2018. REUTERS/Daniel Becerril

Enrique Beltranena, Chief Executive Officer of Mexican low-cost airline Volaris, speaks during an interview with Reuters in Mexico City, Mexico January 15, 2018. REUTERS/Daniel Becerril

Volaris Airbus A320-233 passes over a neighbourhood as it comes into land at the Benito Juarez International Airport in Mexico City, Mexico January 12, 2018. REUTERS/Carlos Jasso

Volaris Airbus A321-231 passes over a neighbourhood as it comes into land at the Benito Juarez International Airport in Mexico City, Mexico January 12, 2018. REUTERS/Carlos Jasso

Passengers walk past the logo of Mexican low-cost air carrier Volaris at Benito Juarez International Airport in Mexico City, Mexico January 10, 2018. Picture taken January 10, 2018. REUTERS/Daniel Becerril

A Volaris Airbus A320-200 aircraft prepares to land at Benito Juarez International Airport in Mexico City, Mexico January 10, 2018. Picture taken January 10, 2018. REUTERS/Daniel Becerril

A Volaris Airbus A320-200 aircraft sits on the tarmac at Benito Juarez International Airport in Mexico City, Mexico January 10, 2018. Picture taken January 10, 2018. REUTERS/Daniel Becerril

The logo of Mexican low-cost air carrier Volaris is pictured at Benito Juarez International Airport in Mexico City, Mexico January 10, 2018. Picture taken January 10, 2018. REUTERS/Daniel Becerril

A passenger (R) talks to an airline employee of the Mexican low-cost air carrier Volaris at Benito Juarez International Airport in Mexico City, Mexico January 10, 2018. Picture taken January 10, 2018. REUTERS/Daniel Becerril

A Volaris aeroplane prepares to land on the airstrip at Benito Juarez international airport in Mexico City, Mexico, June 27, 2017. REUTERS/Edgard Garrido

Malaysia Airlines CEO Peter Bellew (C) talks next to United Airlines Chief Executive Officer Oscar Munoz (L) and CEO of Mexican low-cost air carrier Volaris Inc. Enrique Beltranena during a meeting of the International Air Transport Association (IATA) in Cancun, Mexico June 5, 2017. REUTERS/Victor Ruiz Garcia

Enrique Beltranena, CEO of Mexican low-cost air carrier Volaris Inc., attends a meeting of the International Air Transport Association (IATA) in Cancun, Mexico June 5, 2017. REUTERS/Victor Ruiz Garcia

Enrique Beltranena, CEO of Mexican low-cost air carrier Volaris Inc., attends a meeting of the International Air Transport Association (IATA) in Cancun, Mexico June 5, 2017. REUTERS/Victor Ruiz Garcia

Enrique Beltranena, CEO of Mexican low-cost air carrier Volaris Inc., attends a meeting of the International Air Transport Association (IATA) in Cancun, Mexico June 5, 2017. REUTERS/Victor Ruiz Garcia

Mexican low-cost air carrier Volaris Inc. CEO, Enrique Beltranena (3rd R) rings the opening bell in celebration of his company's IPO at the New York Stock Exchange, September 18, 2013. Shares of Mexico's low-cost airline Volaris rose as much as 13 percent on the New York Stock Exchange in their U.S. debut on Wednesday, after the company raised about $350 million through an initial public offering. REUTERS/Brendan McDermid (UNITED STATES - Tags: TRANSPORT BUSINESS)

Mexican low-cost air carrier Volaris Inc. CEO, Enrique Beltranena (C) celebrates his company's IPO on the floor of the New York Stock Exchange, September 18, 2013. Shares of Mexico's low-cost airline Volaris rose as much as 13 percent on the New York Stock Exchange in their U.S. debut on Wednesday, after the company raised about $350 million through an initial public offering. REUTERS/Brendan McDermid (UNITED STATES - Tags: TRANSPORT BUSINESS)

Trader Thomas Ferrigno (C) waits for the opening of Mexican low-cost air carrier Volaris on the floor of the New York Stock Exchange, September 18, 2013. Shares of Mexico's low-cost airline Volaris rose as much as 13 percent on the New York Stock Exchange in their U.S. debut on Wednesday, after the company raised about $350 million through an initial public offering. REUTERS/Brendan McDermid (UNITED STATES - Tags: BUSINESS)

Broiler carcasses hang off hooks in an aviary at a poultry farm in the village of Pesochnaia Buda, some 330 km (206 miles) southeast of Minsk, June 11, 2013. The farm produces 500,000 chicks per month and a yearly output of 11,000 tons of meat. Chicken meat is very popular among Belarusians due to its low price, compared to pork and beef, local media reported. REUTERS/Vasily Fedosenko (BELARUS - Tags: ANIMALS SOCIETY)

Chickens are seen in an aviary at a poultry farm in the village of Pesochnaia Buda, some 330 km (206 miles) southeast of Minsk, June 11, 2013. The farm produces 500,000 chicks per month and a yearly output of 11,000 tons of meat. Chicken meat is very popular among Belarusians due to its low price, compared to pork and beef, local media reported. REUTERS/Vasily Fedosenko (BELARUS - Tags: ANIMALS SOCIETY)

A zoo official carries a pink pelican to its aviary in Barnaul, November 16, 2010. A flock of African pink pelicans en route home landed in Siberia on Tuesday, astounding local residents after they lost their way south thrown by Russia's abnormally warm weather. REUTERS/Andrei Kasprishin (RUSSIA - Tags: ENVIRONMENT ANIMALS)

Pelicans are seen nesting in their enclosure at the Jurong Bird Park in Singapore June 22, 2009. The Singapore Bird Park, which contains over 8000 birds from more than 600 species, specially models its aviaries to resemble those of the birds' natural habitats. REUTERS/Gary Khoo (SINGAPORE ENVIRONMENT SOCIETY ANIMALS)

Lories perch as they feed at the Singapore Bird Park June 22, 2009. The Singapore Bird Park, which contains over 8000 birds from more than 600 species, specially models its aviaries to resemble those of the birds' natural habitats. REUTERS/Alywin Chew (SINGAPORE ENVIRONMENT ANIMALS SOCIETY)

A Toco Toucan is perched on the arm of a visitor at the Jurong Bird Park in Singapore January 7, 2009. REUTERS/Vivek Prakash (SINGAPORE)

A golden-breasted starling is perched on a branch at the Jurong Bird Park in Singapore January 7, 2009. REUTERS/Vivek Prakash (SINGAPORE)

A Superb Starling (Lamprotornis superbus) feeds off a visitor's hand at an aviary at Singapore's Jurong Bird Park January 7, 2009. REUTERS/Tim Chong (SINGAPORE)

The swollen feet of an 11-year-old white-headed vulture (Trigonoceps occipitalis) are seen as it undergoes surgery for bumblefoot at the Jurong Bird Park in Singapore October 21, 2008. Bumblefoot is a bacterial infection which is common for birds of prey in captivity. REUTERS/Tim Chong (SINGAPORE)

An 11-year-old white-headed vulture (Trigonoceps occipitalis) is sedated as it undergoes surgery to cure bumblefoot at the Jurong Bird Park in Singapore October 21, 2008. Bumblefoot is a bacterial infection which is common for birds of prey in captivity. REUTERS/Tim Chong (SINGAPORE)

The eye of a Toco-Toucan is seen at Bird Park in Foz do Iguacu September 19, 2007. Visitors can see around 500 colourful birds flying in the huge aviaries which have been built to blend in with the humid subtropical forest. REUTERS/Paulo Whitaker (BRAZIL)

A duck dives to fish in a lake at Bird Park in Foz do Iguacu September 19, 2007. Visitors can see around 500 colourful birds flying in the huge aviaries which have been built to blend in with the humid subtropical forest. REUTERS/Paulo Whitaker (BRAZIL)

A Scarlet Macaw is seen at Bird Park in Foz do Iguacu September 19, 2007. Visitors can see around 500 colourful birds flying in the huge aviaries which have been built to blend in with the humid subtropical forest. REUTERS/Paulo Whitaker (BRAZIL)

A Blue Macaw is seen in an artificial nest at Bird Park in Foz do Iguacu September 19, 2007. Visitors can see around 500 colorfoul birds flying in the huge aviaries which have been built to blend in with the humid subtropical florest. REUTERS/Paulo Whitaker (BRAZIL)

Two Blue and Yellow Macaws are seen at Bird Park in Foz do Iguacu September 19, 2007. Visitors can see around 500 colourful birds flying in the huge aviaries which have been built to blend in with the humid subtropical forest. REUTERS/Paulo Whitaker (BRAZIL)

A Blue Macaw takes bath at Bird Park in Foz do Iguacu September 19, 2007. Visitors can see around 500 colourful birds flying in the huge aviaries which have been built to blend in with the humid subtropical forest. REUTERS/Paulo Whitaker (BRAZIL)

A Blue and Yellow Macaw is seen at a Bird Park in Foz do Iguacu September 19, 2007. Visitors can see around 500 colourful birds flying in the huge aviaries which have been built to blend in with the humid subtropical forest. REUTERS/Paulo Whitaker (BRAZIL)

The eye of a Toco-Toucan is seen at Bird Park in Foz do Iguacu September 19, 2007. Visitors can see around 500 colourful birds flying in the huge aviaries which have been built to blend in with the humid subtropical forest. REUTERS/Paulo Whitaker (BRAZIL)

A white peacock displays its feathers in a bird park in Amman February 21, 2006. REUTERS/Ali Jarekji

Two birds of paradise (paradise minor), one of the most well-known and
famous species in Indonesia's remote Papua province, get friendly August 27,
2003 at an aviary built by Dr John Manangsang, who cares for birds shot and
injured by poachers. Manangsang wants to set up a bird sanctuary in a nature
reserve not far from his home to help the birds, among a number of protected
species being threatened by illegal smuggling. Papua is home to some of the
rarest tropical bird species in the world. Picture taken August 27, 2003. TO
ACCOMPANY FEATURE ENVIRONMENT PARK INDONESIA NO RIGHTS CLEARANCES OR PERMISSIONS ARE REQUIRED FOR THIS IMAGE
REUTERS/Beawiharta

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