Flight Tickets:

http://www.travelocity.co.in/

http://www.cleartrip.com/trains

http://www.travelguru.com/

http://www.yatra.com/?redirect=no ICICI offer

http://goibibo.ibibo.com/ HDFC offer and cheap air tickets..

Good but costly

http://www.makemytrip.com/

Even from Railway site..

http://air.irctc.co.in/