Originally Posted by
savitar
Pardon my complete ignorance but what is the difference between an ITA and non ITA fare?
To add to
NeverFirst's explanation of what they meant by an ITA fare (ie a fare displayed by ITA, even if it's rather exotic): ITA will only display published fares, but travel agents will often also be able to sell you non-published fares. The rules for these can be more opaque.