The Singapore Airlines (SIA) received one of its best complimentary letters this year.

And the passenger probably didn't even write a letter.

Prime Minister Lee Hsien Loong shared a photo of the SIA cabin crew on his flight back from India two weeks ago, thanking SIA for its "great service, and for keeping SIA a great way to fly!"

His praise prompted a reply from SIA.

The SIA cabin crew were hard at work after the meal service when PM Lee visited them.

It is likely that a passenger has ordered a merchandise from SIA and the in-flight supervisor (the man holding the Kris Shop catalogue) and the leading stewardess (the lady in green) were preparing the products for him/ her.

PM Lee flies commercial mostly

While many world leaders arrived with their jumbo jet flag carriers, or their own presidential airplanes (US President Barack Obama's Air Force One), PM Lee has been known to use commercial flights while traveling on official business.

PM's less conspicuous arrival at APEC Summit last year caught the eyes of many Filipinos, who noticed that PM Lee was using a small nondescript private Gulfstream jet.

To recap some of the countries PM Lee has visited so far, check out this video.

Top photo from Lee Hsien Loong Facebook

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