Here’s a short list of websites / apps that can help with flights and accommodation.
http://www.kayak.com – An excellent place to find up-to-the minute flights at highly discounted rates
http://www.rome2rio.com – Probably the best route-planner there is. Has all modes of transportation that can be taken wherever you’re going in the world with prices
http://www.agoda.com– A solid place to look for accommodation
http://www.couchsurfing.com – need a place to stay for free? Look no further