I just tried it worked for me.
example:
https://www.itn.net/cgi/air?stamp=ET...ch_page=speedy &air_class=coach+%28lowest+avail.%29&depart=gva&de st.0=lon&mon_abbr.0=Aug&date.0=9&hour_ampm.0=5+am& mon_abbr.1=Aug&date.1=11&hour_ampm.1=5+am&cabin_cl ...=coach&psgr_type.1=adult&pe rsons.1=1&pricing_type=lowest+available&air_avail= 10
It says Crossair and not Swiss but same flight numbers (LX-)
kooks.