An angry mother has claimed a flight attendant yelled at her repeatedly because her eight-month-old son cried for five minutes during a long-haul flight.

Krupa Patel Bala, her husband and their son were travelling business class to San Francisco from Sydney on United Airlines when the alleged incident occurred.

The mother, who works at Facebook, made an emotional post on her social media account claiming a flight attendant yelled at her husband that it was ‘absolutely unacceptable’ for their baby to cry.

‘I’m traveling with my husband and 8-month old son and we purchased business class seats with a bassinet for the baby,’ Krupa wrote.

‘After about 5 minutes of the baby crying in the bassinet, Linda (the flight attendant manager who is also our server and the purser) came over and *yelled* at my husband it was “absolutely unacceptable” for the baby to cry.’

At one point, she claimed the attendant called her to economy class to school her on how she could have avoided the crying by changing the baby’s bottle and nap time.

Ms Bala managed to use the business class WiFi to share live updates to Facebook as the tense situation unfolded.

‘Now, I don’t really know what’s wrong with my baby, but he tends to cry from time to time,’ she wrote.

‘I hear that’s common with newborns but this is my only child, so I could be mistaken.

‘Parents of newborns have it hard enough already traveling with a baby and we certainly don’t need CREW MANAGERS piling on when we are doing our best to ensure we’re containing our children and their cries.’

She said the situation ‘really stressed out’ the rest of crew, who later told her the crying had not worried them at all and they barely even noticed it.

As they were leaving, she said the captain apologised for the attendant’s behaviour, and when they arrived at the airport they were greeted by United Airlines staff.

The company offered the family a refund and removed the crew member from service while it investigated the incident.

‘Young families are welcome on our flights, including in business class. We are continuing to review the incident internally and the flight attendant is being held out of service pending the investigation,’ the airline said in a statement.

Ms Bala thanked United for their cooperation but was still waiting on an apology from the crew member in question.