An Airbus A321 plane of the French airline Air France is seen on the tarmac at the Marseille-Provence airport in Marignane on the first day of a strike by Air France stewards, France, July 27, 2016. REUTERS/Philippe Laurenson

An Airbus A321 plane of the French airline Air France is seen on the tarmac at the Marseille-Provence airport in Marignane on the first day of a strike by Air France stewards, France, July 27, 2016. REUTERS/Philippe Laurenson

Football Soccer - Euro 2016 - Belgium team departure - Zaventem airport, Belgium - 7/06/16 - Brussels Airlines flight attendants pose inside a turbine engine. REUTERS/Francois Lenoir TPX IMAGES OF THE DAY

Passengers check their flight on an information board at Congonhas airport in Sao Paulo, Brazil, February 3, 2016. Brazilian airline pilots and stewards halted work for two hours on Wednesday in a pay dispute, delaying and cancelling flights across the country days before the start of the carnival holiday season. REUTERS/Paulo Whitaker

Passengers rest during an airline crew members strike at Congonhas airport in Sao Paulo, Brazil, February 3, 2016. Brazilian airline pilots and stewards halted work for two hours on Wednesday in a pay dispute, delaying and cancelling flights across the country days before the start of the carnival holiday season. REUTERS/Paulo Whitaker

Airline crew members attend a strike at Congonhas airport in Sao Paulo, Brazil, February 3, 2016. Brazilian airline pilots and stewards halted work for two hours on Wednesday in a pay dispute, delaying and cancelling flights across the country days before the start of the carnival holiday season. REUTERS/Paulo Whitaker

A passenger does her nails as airline crew members attend a strike at Congonhas airport in Sao Paulo, Brazil, February 3, 2016. Brazilian airline pilots and stewards halted work for two hours on Wednesday in a pay dispute, delaying and cancelling flights across the country days before the start of the carnival holiday season. REUTERS/Paulo Whitaker

Airline crew members attend a two hours strike calling for increase in their salary at Congonhas airport in Sao Paulo, Brazil, February 3, 2016. Brazilian airline pilots and stewards halted work for two hours on Wednesday in a pay dispute, delaying and cancelling flights across the country days before the start of the carnival holiday season. REUTERS/Paulo Whitaker TPX IMAGES OF THE DAY

Passengers check their flight on an information board at Congonhas airport in Sao Paulo, Brazil, February 3, 2016. Brazilian airline pilots and stewards halted work for two hours on Wednesday in a pay dispute, delaying and cancelling flights across the country days before the start of the carnival holiday season. REUTERS/Paulo Whitaker TPX IMAGES OF THE DAY

Airline crew members attend a two hours strike calling for increase in their salary at Congonhas airport in Sao Paulo, Brazil, February 3, 2016. Brazilian airline pilots and stewards halted work for two hours on Wednesday in a pay dispute, delaying and cancelling flights across the country days before the start of the carnival holiday season. REUTERS/Paulo Whitaker

A member of Daallo Airlines ground crew walks down an aisle inside their airline at Aden Abdule International Airport in Somalia's capital Mogadishu, February 17, 2015. Regional carriers Daallo Airlines and Jubba Airways profited independently for years in one of the world's toughest markets, competing on routes to war-torn Somalia that most avoided. Yet as the guns fall silent, the rivals face a new battle that has pushed them to merge: competition from big international carriers such as Turkish Airlines, Ethiopian Airlines and flydubai, muscling into Somali airspace. REUTERS/Feisal Omar (SOMALIA - Tags: SOCIETY BUSINESS TRANSPORT CIVIL UNREST) 

A flock of birds is seen on a tree against the moon in Kostanay, northern Kazakhstan, November 8, 2014. REUTERS/Shamil Zhumatov (KAZAKHSTAN - Tags: ENVIRONMENT ANIMALS TPX IMAGES OF THE DAY) 

A Lucky Air crew member dressed as Spiderman (3rd R) during an onboard Halloween celebration sits next to passengers during a flight from Kunming to Shenzhen, in Kunming, October 31, 2014. Attendants of the domestic Lucky Air flight on Friday night dressed themselves in costumes of superheroes and movie figures to serve their customers as well as celebrate Halloween, according to local media. REUTERS/Wong Campion (CHINA - Tags: SOCIETY TRANSPORT TPX IMAGES OF THE DAY) 

A steward from the Argentine airline Aerolineas Argentinas takes a picture of crew members in front of the plane that will take the Argentine national soccer team to Brazil for the 2014 World Cup at Ezeiza airport in Buenos Aires June 3, 2014. REUTERS/Marcos Brindicci (ARGENTINA - Tags: SPORT SOCCER WORLD CUP TRANSPORT) 

Cabin crews are scanned for their temperature as they arrive at Hong Kong International Airport April 9, 2013. A strain of bird flu that has been found in humans for the first time in eastern China is no cause for panic, the World Health Organization said on Monday, as the number of people infected rose to 24, with seven deaths. REUTERS/Tyrone Siu (CHINA - Tags: HEALTH TRAVEL SOCIETY) 

Iberia employees hold up a pirate and a British flag as they walk towards the headquarters of Spain's Public Works Ministry during an Iberia strike, the fourth day of the second of three five-day stoppages planned for February and March, in Madrid March 7, 2013. Management at airline Iberia met union leaders on Thursday to discuss a mediator's proposal for less harsh job and salary cuts at the Spanish flag carrier, although a deal to end strike action still seemed far off. Iberia pilots, air stewards and ground staff have been out since March 4 in the second of three five-day strikes in February and March, protesting at plans to lay off 3,807 workers and cut salaries by 20 percent in what the airline calls "a fight for survival". REUTERS/Susana Vera (SPAIN - Tags: TRANSPORT POLITICS BUSINESS CIVIL UNREST EMPLOYMENT) 

Iberia employees protest outside the headquarters of Madrid's Public Works Ministry during an Iberia strike, the fourth day of the second of three five-day stoppages planned for February and March, in Madrid March 7, 2013. Management at airline Iberia met union leaders on Thursday to discuss a mediator's proposal for less harsh job and salary cuts at the Spanish flag carrier, although a deal to end strike action still seemed far off. Iberia pilots, air stewards and ground staff have been out since March 4 in the second of three five-day strikes in February and March, protesting at plans to lay off 3,807 workers and cut salaries by 20 percent in what the airline calls "a fight for survival". REUTERS/Susana Vera (SPAIN - Tags: TRANSPORT POLITICS BUSINESS CIVIL UNREST EMPLOYMENT) 

An Iberia employee wears a sticker on her hat that reads "Let's save Iberia" as they protest during an Iberia strike, the fourth day of the second of three five-day stoppages planned for February and March, in Madrid March 7, 2013. Management at airline Iberia met union leaders on Thursday to discuss a mediator's proposal for less harsh job and salary cuts at the Spanish flag carrier, although a deal to end strike action still seemed far off. Iberia pilots, air stewards and ground staff have been out since March 4 in the second of three five-day strikes in February and March, protesting at plans to lay off 3,807 workers and cut salaries by 20 percent in what the airline calls "a fight for survival". REUTERS/Susana Vera (SPAIN - Tags: TRANSPORT POLITICS BUSINESS CIVIL UNREST EMPLOYMENT) 

Iberia employees shout slogans next to the smoke of a firecracker as they protest outside the headquarters of Spain's Public Works Ministry during an Iberia strike, the fourth day of the second of three five-day stoppages planned for February and March, in Madrid March 7, 2013. Management at airline Iberia met union leaders on Thursday to discuss a mediator's proposal for less harsh job and salary cuts at the Spanish flag carrier, although a deal to end strike action still seemed far off. Iberia pilots, air stewards and ground staff have been out since March 4 in the second of three five-day strikes in February and March, protesting at plans to lay off 3,807 workers and cut salaries by 20 percent in what the airline calls "a fight for survival". REUTERS/Susana Vera (SPAIN - Tags: TRANSPORT POLITICS BUSINESS CIVIL UNREST EMPLOYMENT) 

A woman covers her ear as an Iberia employee blows a whistle during an Iberia strike, the fourth day of the second of three five-day stoppages planned for February and March, in Madrid March 7, 2013. Management at airline Iberia met union leaders on Thursday to discuss a mediator's proposal for less harsh job and salary cuts at the Spanish flag carrier, although a deal to end strike action still seemed far off. Iberia pilots, air stewards and ground staff have been out since March 4 in the second of three five-day strikes in February and March, protesting at plans to lay off 3,807 workers and cut salaries by 20 percent in what the airline calls "a fight for survival". The sign reads, "Iberia for sale. And if we let them, they will also sell your mother!". REUTERS/Susana Vera (SPAIN - Tags: TRANSPORT POLITICS BUSINESS CIVIL UNREST EMPLOYMENT) 

A woman wears a "Love Iberia" sticker as she protests during an Iberia strike, the fourth day of the second of three five-day stoppages planned for February and March, in Madrid March 7, 2013. Management at airline Iberia met union leaders on Thursday to discuss a mediator's proposal for less harsh job and salary cuts at the Spanish flag carrier, although a deal to end strike action still seemed far off. Iberia pilots, air stewards and ground staff have been out since March 4 in the second of three five-day strikes in February and March, protesting at plans to lay off 3,807 workers and cut salaries by 20 percent in what the airline calls "a fight for survival". REUTERS/Susana Vera (SPAIN - Tags: TRANSPORT POLITICS BUSINESS CIVIL UNREST EMPLOYMENT TPX IMAGES OF THE DAY) 

Iberia employees walk through smoke from a firecracker thrown by fellow employees as they protest during an Iberia strike, the fourth day of the second of three five-day stoppages planned for February and March, in Madrid March 7, 2013. Management at airline Iberia met union leaders on Thursday to discuss a mediator's proposal for less harsh job and salary cuts at the Spanish flag carrier, although a deal to end strike action still seemed far off. Iberia pilots, air stewards and ground staff have been out since March 4 in the second of three five-day strikes in February and March, protesting at plans to lay off 3,807 workers and cut salaries by 20 percent in what the airline calls "a fight for survival". REUTERS/Susana Vera (SPAIN - Tags: TRANSPORT POLITICS BUSINESS CIVIL UNREST EMPLOYMENT TPX IMAGES OF THE DAY) 

Former air hostesses and stewards of bankrupt Belgian airline Sabena, attend a ceremony marking the 10th anniversary of the airline's bankruptcy at Zaventem international airport near Brussels November 7, 2011. REUTERS/Francois Lenoir (BELGIUM - Tags: TRANSPORT ANNIVERSARY BUSINESS EMPLOYMENT) 

Former air hostesses and stewards of failed Belgian airline Sabena, attend a ceremony marking the 10th anniversary of the airline's bankruptcy at Zaventem international airport near Brussels November 7, 2011. REUTERS/Francois Lenoir (BELGIUM - Tags: TRANSPORT BUSINESS EMPLOYMENT ANNIVERSARY) 

Virgin Atlantic Cabin Crew and Chief Commercial Officer Julie Southern (FRONT, 3rd L), pose for photographers outside the Treasury in London, June 16, 2011. The demonstrators delivered the airline's submission to the Treasury on the final day of the government's Air Passenger Duty consultation. REUTERS/Luke MacGregor (BRITAIN - Tags: TRANSPORT BUSINESS POLITICS EMPLOYMENT TRAVEL) 

Flight attendant trainees slide down an aircraft emergency evacuation slide at Garuda Indonesia Training Centre in Jakarta January 25, 2011. PT Garuda Indonesia, the country's national flag carrier, has priced an initial public offering at 750 rupiah ($0.08) a share or the bottom of a 750-1,100 rupiah ($0.08-$0.12) initial range, though the government has yet to make a final decision, sources told Reuters on Tuesday. REUTERS/Beawiharta (INDONESIA - Tags: BUSINESS TRANSPORT EMPLOYMENT) 

Cebu Pacific airlines cabin crew perform a safety demonstration routine during a ceremony inside a trading floor of the stock exchange in Makati's financial district of Manila October 26, 2010. Philippine budget airline Cebu Air Incorporated jumped as much as 6.8 percent on its debut on Tuesday, as the country's largest public offering rode on the back of a broader market that hit a fresh record high. REUTERS/Romeo Ranoco (PHILIPPINES - Tags: TRANSPORT BUSINESS IMAGES OF THE DAY) 

A member of the Flight Attendants and Stewards Association of the Philippines (FASAP) clenches her fist while holding a placard during a news conference in Manila September 9, 2010. FASAP, will file their notice of strike on Thursday to the Department of Labor and Employment and will conduct the strike, against age and gender discrimination, end of October and November. The labor union, FASAP, represents about 1,600 Philippine Airlines (PAL) flight attendants who will join the strike. REUTERS/Romeo Ranoco (PHILIPPINES - Tags: POLITICS EMPLOYMENT BUSINESS CIVIL UNREST TRANSPORT) 

Members of Flight Attendants and Stewards Association of the Philippines (FASAP) clench their fists while holding placards after announcing they will file a notice of strike to the Department of Labor and Employment during a news conference in Manila September 9, 2010. FASAP is set to conduct the strike, against age and gender discrimination, end of October and November. The labor union, FASAP, represents about 1,600 Philippine Airlines (PAL) flight attendants who will join the strike. REUTERS/Romeo Ranoco (PHILIPPINES - Tags: POLITICS EMPLOYMENT BUSINESS CIVIL UNREST TRANSPORT) 

Flight attendants stand in the aisle of the Economy Class in a new Airbus A380 aircraft for Lufthansa before a hand-over ceremony at the manufacturer's site in Finkenwerder, near Hamburg, May 19, 2010. REUTERS/Morris Mac Matzen (GERMANY - Tags: TRANSPORT) 

OpenSkies Airline Senior Flight Officer Andy Pomeroy walks down the aisle of one of its Boeing 757-200 jets that features 84 business class seats only cabins in Dulles, Virginia, March 24, 2010. OpenSkies, a subsidiary airline of British Airways, announced today it will be featuring an exclusive menu created by renowned chef Michel Richard for OpenSkies customers travelling on its new route between Washington D.C.-Dulles and Paris-Orly for two months this summer beginning in June. REUTERS/Hyungwon Kang (UNITED STATES - Tags: TRANSPORT BUSINESS) 

Crew chat inside the cabin of a Bombardier Challenger 850 at the Asian Aerospace Expo in Hong Kong September 8, 2009. REUTERS/Bobby Yip (CHINA BUSINESS TRANSPORT) 

A flight attendant takes a picture of colleagues during a warning strike at Frankfurt airport January 28, 2009. Warning strikes by the UFO cabin crew union disrupted some flights by Deutsche Lufthansa in Frankfurt and Berlin early on Wednesday, the airline and the union said. REUTERS/Alex Grimm (GERMANY) 

A steward poses at the economy class section of an A380 aircraft during a hand-over ceremony in Hamburg, July 28, 2008. Dubai-based airline Emirates, which was also taking delivery of the first of 58 Airbus A380 superjumbo jets, was firming up 30 options for A350 XWB aircrafts after it signed a deal for 70 A350s with options for 50 more at the Dubai air show last year. REUTERS/Tobias Schwarz (GERMANY) 

Flight crew members of a Philippine Airlines plane make their way towards the recently opened Terminal 3 of Ninoy Aquino International Airport in Manila July 24, 2008. REUTERS/John Javellana (PHILIPPINES) 

A flight attendant prepares to serve coffee to journalists during a flight tour organized by Emirates airline in Dubai September 7, 2007. Emirates, the largest Arab airline, may decide as early as next month on a 50-plane order between Boeing 787 aircraft and Airbus A350, and take an option for 50 more, its president Tim Clark said on Friday. REUTERS/Ahmed Jadallah (UNITED ARAB EMIRATES) 

Flight attendants serve journalists during a flight tour organized by Emirates airline in Dubai September 7, 2007. Emirates, the largest Arab airline, may decide as early as next month on a 50-plane order between Boeing 787 aircraft and Airbus A350, and take an option for 50 more, its president Tim Clark said on Friday. REUTERS/Ahmed Jadallah (UNITED ARAB EMIRATES) 

A view of business class seating inside the Airbus A380 parked outside hangar 19 at JFK International Airport in New York March 19, 2007. REUTERS/Shannon Stapleton (UNITED STATES) 

Thai stewards wave after arriving at Bangkok's new Suvarnabhumi international airport on a test flight September 29,2005. The airport has been dogged by delays and allegations of corruption over luggage scanners. 

Champion of the 2005 Formula One season, Renault's driver Fernando Alonso of Spain (C), stops to have his picture taken on request from an air steward of Iberia Airlines (L) as he rushes through Sao Paulo's Guarulhos airport to board a plane to Europe, September 26, 2005. REUTERS/Fernando Cavalcanti 

Chairman of Bmi airline Sir Michael Bishop (C) poses with air stewards during a news conference in Bombay May 17, 2005. Bmi, Britain's second-largest full-service airline, plans to launch a daily service between London and Bombay this October that will help take on rivals British Airways and Virgin Atlantic, Bishop said. REUTERS/Punit Paranjpe PP/AH 

A Qantas steward looks out of the door of a Boeing-747 plane painted with Aboriginal designs at Sydney Airport May 12, 2004. Australia's biggest airline, Qantas Airways Ltd announced it will raise passenger fares to combat a 57 percent rise in fuel costs over the past year. Fuel surcharges of A$6 ($4) to A$15 ($10) per ticket would take effect next week and were necessary to defray part of the 'hundreds of millions of dollars' in added fuel costs to the company. REUTERS/David Gray DG/CP 

A young man sleeps at an unattended check-in desk at Rome's Fiumicino
International Airport June 3, 2003. Alitalia cancelled 225 flights on
Tuesday as hundreds of stewards and stewardesses called in sick for a
fourth day running in protest at the airlines plan to reduce cabin
crews. Other employees also went ahead with a previously-planned four
hour striker, leaving thousands of travellers stranded at airports
around Italy. REUTERS/Giampiero Sposito REUTERS

DJM 

Stranded passengers sit on their luggage trolleys at Rome's Fiumicino
International Airport June 3, 2003. Alitalia cancelled 225 flights on
Tuesday as hundreds of stewards and stewardesses called in sick for a
fourth day running in protest at the airlines plan to reduce cabin
crews. Other employees also went ahead with a previously-planned four
hour striker, leaving thousands of travellers stranded at airports
around Italy. REUTERS/Giampiero Sposito REUTERS

DJM 

An air hostess and a steward of Belgium's crippled Sabena comfort each other while at Brussels' Zaventem airport November 7, 2001. Sabena employees gathered at the airport to demonstrate after the company announced Tuesday evening it would file for bankruptcy. 

An air hostess and a steward of Belgium's crippled Sabena airline comfort each other while at Brussels' Zaventem airport November 7, 2001. Sabena employees gathered at the airport to demonstrate after the company announced Tuesday evening it would file for bankruptcy. 

Air hostesses and stewards of Belgium's crippled Sabena airline stand next to banner reading "Bye, many thanks to the government" during a protest at Brussels' Zaventem airport November 7, 2001. Sabena employees gathered at the airport to demonstrate after the company announced Tuesday evening it would file for bankruptcy. 

An air hostess and a steward of Belgium's crippled Sabena comfort each
other while at Brussels' Zaventem airport November 7, 2001. Sabena
employees gathered at the airport to demonstrate after the company
announced Tuesday evening it would file for bankruptcy. REUTERS/Thierry
Roge

HRM/CRB 

An air hostess and a steward of Belgium's crippled Sabena airline
comfort each other while at Brussels' Zaventem airport November 7,
2001. Sabena employees gathered at the airport to demonstrate after the
company announced Tuesday evening it would file for bankruptcy.
REUTERS/Thierry Roge

HRM/ 

Air hostesses and stewards of Belgium's crippled Sabena airline stand
next to banner reading "Bye, many thanks to the government" during a
protest at Brussels' Zaventem airport November 7, 2001. Sabena
employees gathered at the airport to demonstrate after the company
announced Tuesday evening it would file for bankruptcy. REUTERS/Yves
Herman

HRM/CRB 

Reza Jabbari, an Iranian airline steward who hijacked a plane to Israel in 1995, poses as he sells shoes in Eilat August 4, 2000, a sunny Israeli resort town after his release from an Israeli jail. Speaking in broken Hebrew, Jabbari, 34, who is on probation after serving half of an eight-year term, said he had commandeered the plane to Israel because it was a democracy. Israel let the plane land at an air base, later freeing the aircraft, its 176 passengers and crew to return to Iran but holding Jabbari.

HL 

Singaporean J. Saimee, riding Ouzo, waves to fans as he is surrounded by stewards after winning the Singapore Airlines International Cup at the Turf club March 4. Saimee won $150,000 out of the S$3 million prize money. The Turf club had it's official opening today with one of the riches races held in Singapore.

ST/ME 

Rodolfo Vicente, a Philippine Airlines Inc. (PAL) flight steward, throws his empty luggage at PAL's inflight office in Manila September 25. PAL management ordered its employees to surrender their uniforms and luggage and warned that failure to do so would mean a 30,000 pesos ($ 688) deduction from their separation pay. 

Rodolfo Vicente, a Philippine Airlines Inc. (PAL) flight steward, throws his empty luggage at PAL's inflight office in Manila September 25. PAL management ordered its employees to surrender their uniforms and luggage and warned that failure to do so would mean a 30,000 pesos ( $688) deduction from their separation pay.

RR/TAN/WS 

Philippine Airlines Employees Association (PALEA) union president Alex Barrientos announces the ground crew union's support to the strike by the airline's 620 pilots at a news conference in Manila June 19. Flight Attendants and Stewards Association of the Philippines (Fasap) union president Bob Anduiza (R) also backed up the striking pilots. Creditor banks of PAL on Friday agreed to reschedule the airline's debts, a joint statement by PAL and the banks said. The airline asked the Securities and Exchange Commission to approve a rehabilitation plan and approve a receivership committee for the airline.

RR/CC/AA