Was Useful, Now Frustrating

Instead, download a mainstream flight search app.
Ive used the ITA software matrix website since 2009/10 and couldnt have been happier when it was purchased by Google and the On The Fly app came out.
Being a frequent traveller, On The Fly USED TO BE a great tool - the perfect tool - and Ive recommended it to dozens of people.
Its become irrelevant. It is constantly encountering errors and most often wont take you to the search result page (yes, even after you took the time to enter all the details).
This could most likely all be fixed by a software update (last version 2011).
Unfortunately, now in may 2015, you will be better served by a mainstream flight search app. You wont waste a bunch of time like you would with this one.
Btw, the airfare search via the ITA software matrix WEBSITE sill works well.

Anonisgoose about OnTheFly