Delhi to Mumbai - Yesmytrip.com

There was a time the airfare was quite expensive, but now its not like earlier.

If you are planning to fly from Delhi to Mumbai, plan in advance and book your tickets in advance to avail the best discounts, because domestic flights tend to start out on the high side and slowly drop for a while.
The lowest domestic fares are typically offered between one and four months in advance.
Once you get inside of that month,fares tend to climb.

For more details visit www.yesmytrip.com