In general, when looking for the cheapest flight to Mumbai, try to choose a flight departing in October for the best deal.
Most flyers found that booking flight tickets 60 days in advance of their planned departure date is, on average, the best time to get cheap flights to Mumbai.
On average, the cheapest flights to Mumbai are found when departing on a Sunday. Try to avoid departing on a Friday, as this is usually the most expensive day.
Typically, cheap prices to Mumbai are most often found for noon flights. Cheap prices are less likely for afternoon flights.