Why do airline prices on similar routes vary? And why are some customers still waiting on compensation claims as a result of the Icelandic ash cloud?

Travel guru Simon Calder tackles the questions that you have been sending.

Get in touch with Fast Track via e-mailorFacebook.

Watch Fast Track on the BBC World News channel on Fridays at 2230 GMT, Saturdays at 1230 and 1830 GMT or Sundays at 0730 GMT.