Mumbai International Airport has multiple prayer room located at near the boarding Gate No. 8 at International Terminal. Rumour is that at Terminal No. 2, CSIA airport provided a place for Masjid to perform Prayers. Maharashtra Govt., provided the space for Masjid at airport.
It is a multi-faith prayer room. But you mainly find muslims there because we have 5 obligatory prayers so there’s more chances of finding a muslim in there as one of our prayer timings could happen during our airport visits.