I have been testing ANC cans for use strictly on an airplane and ended up with the P7 wireless, Sony 1000X and B&O H9. I played with these quite a bit at home however the ultimate test was on the airplane and I have just finished taking two flights with them. The P7, although the best sounding of the bunch, was useless on an airplane. Between the Sony and B&O - the B&O is significantly better when it comes to sound quality - there really is no comparison in my opinion.
When it comes to ANC I found that the B&O, while not as good as the Sony, definitely did the job. I have no issues at all using these on an airline flight.
The B&O are keepers for me (and a second pair for my wife) who also preferred them to the Sony.
PS - the H9's are also significantly better constructed than the Sony's - beautiful metal and leather compared to creaky Sony plastic. They are also more comfortable.
PSS - Bose QC35 - they did not even make it to the testing stage on an airline flight. They were immediately ruled out in the comfort of my own home - atrocious sound quality
B&O H9 - game set and match, imho, when it comes to ANC cans for the airplane
B&W P7 wireless - the best wireless cans at the moment (imho)