Originally Posted by
HONcircle
Incorrect.
TG FCL access in BKK is when departing on TG F and *A F, or arriving in BKK in TG F, and connecting to final destination within 24H on any *A flight in same ticket.
OP specifically mentioned arriving in F and departing in C. Under these circumstances F lounge access is only granted for those where both segments are on TG.
I've never been offered, nor heard of, pax getting F lounge access when departing in Y or C on another *A carrier.