It all depends on where you want to go and for how long. Avoid the monsoon, approx June to sept, and the heat, around march to June. Whats left is a good approximation but lndia has a lot of regional variations in its climate. Getting a flight to or from lndia can be expensive and difficult around Christmas or new year and during major lndian festivals like Diwali. Also be aware that rail travel can be booked out weeks in advance during festive periods. Avoid lndian school and public holidays if heading for a beach in Goa,particularly south goa around colva. The beach here can get really busy on weekends as well. In the far south its very hot all year so the monsoon is the determining factor, in the far north you can freeze between December and march, in rajasthan you can bake from february onwards etc etc. my advise is, if you intend to visit, do plenty of research, get a good guide book and leave yourself plenty of time for everything!
In between monday and friday.
June through to October - excluding School Summer Holidays.
Based on early March '08 airfare searches, seems like the first week in June and last week in August are cheapest
They fly to over 10 destinations in India. I don't think there is a limit.
You can travel by Indian rail way trains. By economy class, it is the cheapest mode of transport across the country.
in august, September, January or march or by may
The cheapest time to fly to Bora Bora is typically during the low season, which is from January to March and November.
The cheapest time to fly to Phoenix from Delaware is to buy your tickets on Wednesday. It is cheapest to find a flight Tuesday thru Thursday and stay away from the weekend.
April
in may
August
i have been searching my self and found that march is the cheapest.
The cheapest time of the year to fly to El salvador is from February to March and then again in May, and then from August to October.
winter
In between monday and friday.
about February =)
spring break