Most travellers find the cheapest return flights to Mumbai when choosing a flight departing in March.
On average, from most locations, when planning your trip to Mumbai, try to book your flight in the region of 60 days in advance for the cheapest prices.
From most locations, the cheapest flights to Mumbai are found on a Tuesday. Booking a Monday departure is usually the most expensive.
On average you can find the best deals on plane tickets to Mumbai when looking for flights with midday departure times.