Very useful tool. Obviously it could use some GUI improvements, but that's easy and you've gotten down the link to the ANA tool (which is probably the harder part). There's lots of potential with this site, but some notes/things I'd like to see are:

- For options that the ANA tool shows a connection, your tool only shows the first flight.
- Ability to search for more than one seat would probably be most useful for me.
- Multi-leg trips would be nice, but might be difficult to implement

Great job!