I have been trying the following for online booking of tickets:
- http://www.hipmunk.com/ (I like it's clean layout and price comparison bar diagrams that are laid on time scale. However, some of the times, it can not find the flights.)
- Expedia.com (The famous one.)
- http://www.bookingbuddy.com/ (I like it's tabbed comparison between sites like expedia, orbitz etc.)
Recently I also found that bing also gives nicer way to search for flights.
Any other good suggestions?