UK - USA with in-cabin cats
 

Hi all,
As far as I can tell, Lufthansa, Air France, KLM, and Finnair are the only carriers that allow in-cabin cats to be taken along when leaving from London. I've verified that United, American, JetBlue, Delta, and Virgin Atlantic do not. Wondering if anyone else has any other info on carriers that accept in-cabin cats leaving the UK these days?
Thanks in advance!

All of the LH group airlines do (LX, OS) plus LOT, Iberia, TAP and ITA. If you are willing to accept some routing inconvenience, Turkish and Aeroflot are options as well.
Iberia and Aeroflot are the only options for transporting more than one cat in one carrier (provided weight restrictions are met).
Edit: If you don't mind going via Canada, Air Canada also allows pets in the cabin