I used my frequent flyer mileage to attend a job interview on the East coast. Is the value of the ticket deductible?
Probably not, since the ticket was a free benefit and there was no out-of-pocket cost to you.
However, if you had paid good buddy Joe for his frequent flier mileage that you applied to your ticket to the East, then the amount you paid is deductible provided the job hunting costs are deductible. The major requirement is that the job you are seeking in the East must be in the same line of work as your previous job. This rules out job seekers who are looking for a job in a different field.