I need to travel to Pune directly from the Mumbai Intl Airport can someone guide me on how to get to Pune?

A that time of night, you won't have domestic flights from Mumbai to Pune, so you choice (if you insist on traveling directly and not going into town at all) is pretty much limited to ground transportation. I took a taxi from Mumbai (city) to Pune in Jan 2007, and paid INR 3500 (including tip and highway tolls, and I'm a foreigner). Chances are, if you want to arrange for a taxi directly from the airport, and at night, you'd be paying at least double that amount. Plus, I would think twice about making the jouney at night with a driver that I don't know and who might have been up and driving all day (probable). If you've got local family or friends who can arrange the car for you in advance, that would be safer and cheaper. Otherwise, another option to consider is spending 1 night at the YMCA (safe, clean and reasonably priced at around INR 1200 per night including breakfast) where they can also arrange your car for you the next morning. Hope this help and safe travels!

No flights are operating between Mumbai Intl airport and Pune. If you are an inbound passenger to Mumbai then no need to get the city. Shuttle service between the intl and domestic airports are available at free of cost, and the route is internal. The fare will be varying from the airlines and the departure time. I would suggest you purchase the domestic (Mumbai - Pune) ticket also from your origin.

Take a taxi. It is normal to hire taxis for long distances in India as they are very cheap. It will probably cost about $40, but don't quote me on that.