A Singapore Airlines (SIA) Airbus A350-900 passenger aircraft taxis to a gate at Changi Airport in Singapore April 9, 2018. REUTERS/Tim Chong 

A Singapore Airlines (SIA) plane (C) taxis to the runway at Singapore's Changi Airport August 17, 2016. REUTERS/Edgar Su

FILE PHOTO - Singapore Airlines (SIA) planes sit on the tarmac in Singapore's Changi Airport March 3, 2016. REUTERS/Edgar Su/File Photo 

Singapore Airlines (SIA) planes sit on the tarmac in Singapore's Changi Airport March 3, 2016. REUTERS/Edgar Su

An airport operations crew member prepares to board the first of 67 new Airbus A350-900 planes delivered to Singapore Airlines at Singapore's Changi Airport March 3, 2016. REUTERS/Edgar Su

Singapore Airlines (SIA) planes sit on the tarmac in Singapore's Changi Airport March 3, 2016. REUTERS/Edgar Su

A Singapore Airlines plane sits on the tarmac in Singapore's Changi Airport March 3, 2016. REUTERS/Edgar Su

Singapore Airlines (SIA) CEO Goh Choon Phong speaks during a ceremony to take delivery of the first of 67 Airbus A350-900 planes at Singapore's Changi Airport March 3, 2016. REUTERS/Edgar Su

A Singapore Airlines (SIA) Airbus A350-900 is greeted with a water cannon salute as it arrives at Singapore's Changi Airport March 3, 2016. REUTERS/Edgar Su

A man looks at a Singapore Airlines (SIA) signage outside an SIA service center in Singapore February 10, 2016. REUTERS/Edgar Su 

A Singapore Airlines Airbus A380 can be seen coming into land behind the Sydney Opera House in Sydney, Australia, September 28, 2015. REUTERS/David Gray TPX IMAGES OF THE DAY

Winner Mercedes Formula One driver Lewis Hamilton (L) of Britain sprays champagne over second-placed Red Bull Formula One driver Sebastian Vettel of Germany during the podium ceremony after the Singapore F1 Grand Prix at the Marina Bay street circuit in Singapore September 21, 2014. REUTERS/Pablo Sanchez (SINGAPORE - Tags: SPORT MOTORSPORT F1 TPX IMAGES OF THE DAY) 

Jockey Tommy Dean Berry of Australia (R), compatriot trainer John Moore and Singapore's President Tony Tan (L) pose for a photo after Dan Excel won the Singapore Airlines International (SIA) Cup horse race at Singapore Turf Club May 18, 2014. REUTERS/Edgar Su (SINGAPORE - Tags: SPORT HORSE RACING POLITICS) 

Tommy Dean Berry (L) of Australia riding Dan Excel celebrates with trainer and compatriot John Moore (R) after winning the Singapore Airlines International (SIA) Cup horse race at Singapore Turf Club May 18, 2014. REUTERS/Edgar Su (SINGAPORE - Tags: SPORT HORSE RACING) 

Tommy Dean Berry of Australia celebrates as he rides Dan Excel to victory during the Singapore Airlines International (SIA) Cup horse race at Singapore Turf Club May 18, 2014. REUTERS/Edgar Su (SINGAPORE - Tags: SPORT HORSE RACING) 

Tommy Dean Berry (L) of Australia riding Dan Excel celebrates his victory after the Singapore Airlines International (SIA) Cup horse race at Singapore Turf Club May 18, 2014. REUTERS/Edgar Su (SINGAPORE - Tags: SPORT HORSE RACING) 

Tommy Dean Berry of Australia (R) riding Dan Excel breaks away from the pack as he races to victory during the Singapore Airlines International (SIA) Cup horse race at Singapore Turf Club May 18, 2014. REUTERS/Edgar Su (SINGAPORE - Tags: SPORT HORSE RACING) 

Tommy Dean Berry of Australia rides Dan Excel to victory during the Singapore Airlines International (SIA) Cup horse race at Singapore Turf Club May 18, 2014. REUTERS/Edgar Su (SINGAPORE - Tags: SPORT HORSE RACING) 

Tommy Dean Berry of Australia rides Dan Excel to victory during the Singapore Airlines International (SIA) Cup horse race at Singapore Turf Club May 18, 2014. REUTERS/Edgar Su (SINGAPORE - Tags: SPORT HORSE RACING) 

Jockey Zac Purton (2nd R) riding on Military Attack of Hong Kong gallops among other horses as they start the Singapore Airlines (SIA) International Cup horse race at the Singapore Turf Club May 19, 2013. REUTERS/Edgar Su (SINGAPORE - Tags: SPORT HORSE RACING) 

Jockey Zac Purton (C, in green), horse owners Steven Lo Kit Sing (3rd R) and his wife, are congratulated by Singapore's President Tony Tan (3rd L) after Military Attack of Hong Kong won the Singapore Airlines (SIA) International Cup horse at the Singapore Turf Club May 19, 2013. REUTERS/Edgar Su (SINGAPORE - Tags: SPORT HORSE RACING POLITICS) 

Jockey Zac Purton (R) pulls away from the pack on Military Attack of Hong Kong to win the Singapore Airlines (SIA) International Cup horse race at the Singapore Turf Club May 19, 2013. REUTERS/Edgar Su (SINGAPORE - Tags: SPORT HORSE RACING) 

Jockey Zac Purton (R) looks back as he pulls away from the pack on Military Attack of Hong Kong to win the Singapore Airlines (SIA) International Cup horse race at the Singapore Turf Club May 19, 2013. REUTERS/Edgar Su (SINGAPORE - Tags: SPORT HORSE RACING) 

Jockey Zac Purton (L), horse owners Steven Lo Kit Sing and his wife, celebrate with trainer John Moore (C, in grey) after Military Attack of Hong Kong won the Singapore Airlines (SIA) International Cup horse race at the Singapore Turf Club May 19, 2013. REUTERS/Edgar Su (SINGAPORE - Tags: SPORT HORSE RACING) 

Jockey Zac Purton riding Military Attack of Hong Kong celebrates after winning the Singapore Airlines (SIA) International Cup horse race at the Singapore Turf Club May 19, 2013. REUTERS/Edgar Su (SINGAPORE - Tags: SPORT HORSE RACING) 

Jockey Zac Purton rides Military Attack of Hong Kong to win the Singapore Airlines (SIA) International Cup horse race at the Singapore Turf Club May 19, 2013. REUTERS/Edgar Su (SINGAPORE - Tags: SPORT HORSE RACING) 

Singapore Airlines Ltd (SIA) Chief Executive Officer Goh Choon Phong speaks to analysts and journalists during a post results media briefing in Singapore May 17, 2013. REUTERS/Edgar Su (SINGAPORE - Tags: TRANSPORT BUSINESS HEADSHOT) 

Singapore Airlines Ltd (SIA) Chief Executive Officer Goh Choon Phong speaks to analysts and journalists during a post results media briefing in Singapore May 17, 2013. REUTERS/Edgar Su (SINGAPORE - Tags: TRANSPORT BUSINESS) 

A Qantas aircraft passes by a Singapore Airlines (SIA) aircraft at Changi airport in Singapore May 14, 2013. Singapore Airlines Ltd, caught between the rapid emergence of Gulf carriers and low cost Asian rivals, is attempting a big strategy overhaul to revive growth, pushing into the low-cost segment and expanding its regional network. Picture taken May 14, 2013. REUTERS/Edgar Su (SINGAPORE - Tags: TRANSPORT BUSINESS LOGO) 

A woman walks past a Singapore Airlines (SIA) logo at a ticketing booth at Changi airport in Singapore May 14, 2013. Singapore Airlines Ltd, caught between the rapid emergence of Gulf carriers and low cost Asian rivals, is attempting a big strategy overhaul to revive growth, pushing into the low-cost segment and expanding its regional network. Picture taken May 14, 2013. REUTERS/Edgar Su (SINGAPORE - Tags: TRANSPORT BUSINESS LOGO) 

A staff member walks by a Singapore Airlines (SIA) logo at a ticketing counter at Changi airport in Singapore May 14, 2013. Singapore Airlines Ltd, caught between the rapid emergence of Gulf carriers and low cost Asian rivals, is attempting a big strategy overhaul to revive growth, pushing into the low-cost segment and expanding its regional network. Picture taken May 14, 2013. REUTERS/Edgar Su (SINGAPORE - Tags: TRANSPORT BUSINESS) 

A Singapore Airlines (SIA) logo is pictured at a counter at Changi airport in Singapore May 14, 2013. Singapore Airlines Ltd, caught between the rapid emergence of Gulf carriers and low cost Asian rivals, is attempting a big strategy overhaul to revive growth, pushing into the low-cost segment and expanding its regional network. Picture taken May 14, 2013. REUTERS/Edgar Su (SINGAPORE - Tags: TRANSPORT BUSINESS LOGO) 

A Singapore Airlines (SIA) Cargo Boeing 747-400 aircraft taxis on the runway of Changi International Airport in Singapore September 6, 2012. REUTERS/Tim Chong (SINGAPORE - Tags: TRANSPORT BUSINESS) 

Singapore Airlines Ltd (SIA) Chief Executive Officer Goh Choon Phong attends a post-results media briefing in Singapore May 10, 2012. SIA swung to an unexpected fourth-quarter loss, battered by weak demand and high jet fuel prices, putting further pressure on Chief Executive Goh to turn around the airline. REUTERS/Tim Chong (SINGAPORE - Tags: BUSINESS TRANSPORT HEADSHOT) 

Singapore Airlines Ltd (SIA) Chief Executive Officer Goh Choon Phong attends a post-results media briefing in Singapore May 10, 2012. SIA swung to an unexpected fourth-quarter loss, battered by weak demand and high jet fuel prices, putting further pressure on Chief Executive Goh to turn around the airline. REUTERS/Tim Chong (SINGAPORE - Tags: BUSINESS TRANSPORT HEADSHOT) 

Singapore Airlines Ltd (SIA) Chief Executive Officer Goh Choon Phong gestures as he speaks to analysts and journalists during a post results media briefing in Singapore May 10, 2012. SIA swung to an unexpected fourth-quarter loss, battered by weak demand and high jet fuel prices, putting further pressure on Chief Executive Goh to turn around the airline. REUTERS/Tim Chong (SINGAPORE - Tags: BUSINESS TRANSPORT) 

A Singapore Airlines (SIA) Boeing 777-300ER passenger jet takes off in the rain at Changi Airport in Singapore April 21, 2012. SIA, the world's second largest carrier by market value, on May 9, 2012 reported an unexpected loss for its fiscal fourth quarter, hurt by weak travel demand and soaring jet fuel prices. Picture taken April 21, 2012. REUTERS/Tim Chong (SINGAPORE - Tags: BUSINESS TRANSPORT) 

Singapore Airlines' (SIA) Boeing 747-400 passenger jet with registration 9V-SPQ, one of the three currently in service, is reflected in a puddle at the Singapore Airshow in Singapore February 17, 2012. SIA will operate two commemorative flights between Singapore and Hong Kong on April 6, 2012 using this aircraft to mark the retirement of the 747 after almost 4 decades of service, according to a press release. REUTERS/Tim Chong (SINGAPORE - Tags: BUSINESS TRANSPORT) 

The tail wings of (L-R) British Airways, Singapore Airlines and Qantas Airways planes are pictured at Singapore Changi Airport October 29, 2011. REUTERS/Tim Chong (SINGAPORE - Tags: BUSINESS TRANSPORT) 

Chie Arimura (R) of Japan set up her shot on the sixth green as a Singapore Airlines (SIA) passenger jet taxis past during the third round of HSBC Women's Champions golf tournament at Tanah Merah Country Club in Singapore February 26, 2011. REUTERS/Tim Chong (SINGAPORE - Tags: SPORT GOLF) 

Ground crew are seen near the engine of a Singapore Airlines' Airbus A380 superjumbo at Singapore's Changi airport November 11, 2010. Singapore Airlines said on Thursday it was in full compliance with safety directives from the European Union on the Rolls Royce engine used on Airbus A380s and does not plan flight cancellations. REUTERS/Tim Chong (SINGAPORE - Tags: TRANSPORT BUSINESS) 

A Singapore Airlines Boeing 777-312 passenger jet lands at Changi Airport in Singapore February 2, 2010. Singapore Airlines, the world's No.2 airline by market value, posted a 19.7 percent rise in quarterly profit on a recovery in cargo volumes and improving passenger demand, but the number was short of expectations. The company, 55 percent-owned by state investor Temasek Holdings, reported a net profit of S$403.7 million ($286.3 million) in its third quarter compared to a net profit of S$337.2 million a year ago, rebounding from two quarters of losses. REUTERS/Tim Chong (SINGAPORE - Tags: BUSINESS TRANSPORT) 

A Singapore Airlines Boeing 777-212ER passenger jet takes off from Changi Airport in Singapore February 2, 2010. Singapore Airlines, the world's No.2 airline by market value, posted a 19.7 percent rise in quarterly profit on a recovery in cargo volumes and improving passenger demand, but the number was short of expectations.



The company, 55 percent-owned by state investor Temasek Holdings, reported a net profit of S$403.7 million in its third quarter compared to a net profit of S$337.2 million a year ago, rebounding from two quarters of losses.
REUTERS/Tim Chong (SINGAPORE) 

A Singapore Airlines Boeing 777 passenger plane approaches Changi international airport in Singapore November 10, 2009. REUTERS/Michael Fiala (SINGAPORE TRANSPORT BUSINESS) 

Jockey tiago Jose Pereira riding horse Gloria De Campeao throws his goggles to the crowd as he celebrates after winning the Singapore Airlines (SIA) International Cup horse race at the Singapore Turf Club May 17, 2009. REUTERS/Vivek Prakash (SINGAPORE SPORT HORSE RACING) 

Jockey Tiago Jose Pereira riding horse Gloria De Campeao celebrates winning the Singapore Airlines (SIA) International Cup horse race at the Singapore Turf Club May 17, 2009. REUTERS/Vivek Prakash (SINGAPORE SPORT HORSE RACING) 

Jockey Tiago Jose Pereira riding horse Gloria De Campeao (R) crosses the finish line ahead of jockey Ryan Moore riding horse Presvis to win the Singapore Airlines (SIA) International Cup horse race at the Singapore Turf Club May 17, 2009. REUTERS/Vivek Prakash (SINGAPORE SPORT HORSE RACING) 

Jockey Tiago Jose Pereira riding horse Gloria De Campeao (R) crosses the finish line ahead of jockey Ryan Moore riding horse Presvis to win the Singapore Airlines (SIA) International Cup horse race at the Singapore Turf Club May 17, 2009. REUTERS/Vivek Prakash (SINGAPORE SPORT HORSE RACING) 

Singapore Airlines CEO Chew Choon Seng sits underneath an SIA logo during a post-results news conference in Singapore May 15, 2009. Singapore Airlines said on Friday that it is not reviving talks over taking a strategic investment in China Eastern Airlines. REUTERS/Vivek Prakash (SINGAPORE TRANSPORT BUSINESS) 

A maintenance worker stands under the tail fin of a Qantas aircraft, as a Singapore Airlines aircraft is seen in the background, at Changi Airport in Singapore May 13, 2009. REUTERS/Vivek Prakash (SINGAPORE TRANSPORT BUSINESS) 

A Singapore Airlines (SIA) Airbus A330 takes off from Changi Airport in Singapore May 13, 2009. Singapore Airlines will announce its full year results and operational data on Thursday. REUTERS/Vivek Prakash (SINGAPORE BUSINESS TRANSPORT) 

A Singapore Airlines (SIA) Airbus A330 aircraft taxis past a parked aircraft at Changi Airport in Singapore May 13, 2009. Singapore Airlines will announce its full year results and operational data on Thursday. REUTERS/Vivek Prakash (SINGAPORE BUSINESS TRANSPORT) 

The tail fins of parked Singapore Airlines (SIA) aircraft are pictured at Changi Airport in Singapore May 13, 2009. Singapore Airlines will announce its full year results and operational data on Thursday. REUTERS/Vivek Prakash (SINGAPORE BUSINESS TRANSPORT) 

The tail fins of parked Singapore Airlines (SIA) aircraft are pictured at Changi Airport in Singapore May 13, 2009. Singapore Airlines will announce its full year results and operational data on Thursday. REUTERS/Vivek Prakash (SINGAPORE BUSINESS TRANSPORT) 

The tail fins of parked Singapore Airlines (SIA) aircraft are pictured at Changi Airport in Singapore May 13, 2009. Singapore Airlines will announce its full year results and operational data on Thursday. REUTERS/Vivek Prakash (SINGAPORE BUSINESS TRANSPORT) 

A member of the maintenance crew examines the engine of a Singapore Airlines (SIA) aircraft at Changi Airport in Singapore May 13, 2009. Singapore Airlines will announce its full year results and operational data on Thursday. REUTERS/Vivek Prakash (SINGAPORE BUSINESS TRANSPORT) 

A member of the maintenance crew examines a Singapore Airlines (SIA) aircraft at Changi Airport in Singapore May 13, 2009. Singapore Airlines will announce its full year results and operational data on Thursday. REUTERS/Vivek Prakash (SINGAPORE TRANSPORT BUSINESS) 

A Singapore Airlines (SIA) Boeing 777 aircraft taxis past a parked aircraft at Changi Airport in Singapore May 13, 2009. Singapore Airlines will announce its full year results and operational data on Thursday. REUTERS/Vivek Prakash (SINGAPORE TRANSPORT BUSINESS) 

A catering truck parks next to a Singapore Airlines (SIA) aircraft at Changi Airport in Singapore May 13, 2009. Singapore Airlines will announce its full year results and operational data on Thursday. REUTERS/Vivek Prakash (SINGAPORE TRANSPORT BUSINESS) 

A Singapore Airlines (SIA) Airbus A330 aircraft taxis past a parked aircraft at Changi Airport in Singapore May 13, 2009. Singapore Airlines will announce its full year results and operational data on Thursday. REUTERS/Vivek Prakash (SINGAPORE TRANSPORT BUSINESS IMAGES OF THE DAY)