Originally Posted by
allturnleft
The App shows Class I both ways
my actual booking shows R out I back
Is this LGW-GLA-LGW? If, so then using some random dates it looks like the lowest theoretical I/I fare is £30 less than the lowest theoretical R/I fare, so on this route it looks like
Anonba's first guess of phantom availability and no offline fee would be correct.
If it were LHR-GLA-LHR, the differential between the lowest theoretical fares on those dates is £20, which could suggest that a £10 has been added on. But that seems unlikely, given that the agent categorically told you that there was no offline fee, and such a fee should have been visible to them.