Flybe's EMB 195 sat 118 pax so the JSI flights done for FlyLoLo were an awful payload penalty at 97 seats - and 1 or 2 flights still had to tech stop IIRC...
Someone mentioned above if an A321NEO can do TFS from SOU - answer is nope. Not even with the planned starter strip. The A321 has a higher risk of tail strike.
It can operate in/out of Skiathos but it will usually Tech stop on the way home.
An A320 maybe able to do SOU to Greece or the Canaries likely with a payload penalty of around 15-20 seats less.
The BACF program from SOU looks rather nice for summer 21.
Pray we have some normality back for our travel abroad to the Med by early summer, but if we don't then that lot will not happen in any quantity.
Needs around 3 aircraft both days -- unless W patterns are going to be happening>?
But W's on a SAT or a SUN originating at LCY are an issue with the LCY pm/am airport closures on those days.
So you cannot do LCY-JMK-SOU-JMK-LCY for instance.
The main major historical weekend charterer of BACF was Bar Head Travel in Scotland who did loads of holiday flights from GLA EDI and ABZ, but sadly they are not renewing their own BACF charter flight series for next summer after having to cancel all of their S20 programme.
This, I guess means BACF are going alone and having a stab at SOU...
The only other sunshine flights are with TUI packages to Palma on TUE and SATS (Volotea flying)
TUI cancelled the IBZ and MAH series.