The F indicator is a great idea, so many thanks for implementing it. :-: A number of routes seem to have incorrect data. Routes that have F but are not showing right now:

NRT to SIN, SFO, FRA, CDG, GRU.
HKG to SYD, MEL, JNB (depending on how you want to treat seasonal flights)
LHR to CAI, TLV, EWR(?), PHL, MCT, GCM,.

Those are the ones that stood out to me, but I'm sure I've missed a few.

The next request is to have an option for the OWE planner only to show flights with F.