Join Date: Aug 2015
Location: DXB
Programs: AA EXP, A3 *G, LH SEN, SK EBG, Marriott Titanium, Hyatt Globalist, Hilton Diamond, etc. etc....
Posts: 3,348
You can’t, as far as I know.
But you can do a little better at least.
First of all, you’ll want O:BA+ (not just BA+) to get BA metal (BA+ would also give you BA codeshare flights operated by AA).
Using O:BA+ will give you any flight operated by BA, no matter the flight number.
Then you could simply list all aircraft you are interested in like “aircraft t:737 t:777 t:350 t:787 t:380”. Since 737 typically aren’t served by 777’s, that should probably be pretty close to what you want. The important thing would be not listing t:320 etc.
Or you’d have to split the searches/use separate queries and aggregate the results yourself.