Recently I flew with my 3 year old son on Sri Lankan Business Class from CMB to FRA.
The service of the cabin crew was fantastic and dedicating. The Business cabin was half empty which may have contributed to the “special” service but the two assigned FAs went the extra mile in any matters, even offered my son to see the cockpit. I haven’t had a memorable experience like this for quite some time. Consequently I handed over an envelop with USD 20 to the two crew taking care of us. From my own experience I usually don’t tip cabin crew unless it was an extraordinary service. And this happens only in 10% of my flights or less.
How common is it to give tip money to airline crew?