The Olympic silver-medal winner took to Twitter to express her anger. She accused an IndiGo ground staff member, Ajeetesh, of behaving "badly and rudely" with her.
In a series of tweets, she said an air hostess, Ashima, intervened but Ajeetesh mistreated her too.
PV Sindhu slams IndiGo Airlines for "bad experience"
Staff members spoiling airlines' reputation: Sindhu
Speaking about the incident, Sindhu said she was traveling to Mumbai by IndiGo flight 6E-608 when airline staffer Ajeetesh mistreated her.
The 22-year-old shuttler said air hostess Ashima advised Ajeetesh to behave properly, but the latter behaved even more rudely with her.
Expressing disgust, she said if people like Ajeetesh work for reputed airlines like IndiGo, they will spoil the airlines' image.
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Sindhu asks IndiGo to contact the air hostess
IndiGo Airlines responded to Sindhu's tweet and said they wanted to talk to her regarding her "bad experience."
However, the badminton star asked them to talk to the air hostess saying she will explain everything in detail.
As of now, it is not clear as to what exactly happened between the ace shuttler and the IndiGo ground staff member.