No, I do not get vowifi when airplane mode is active. But this is more due to device than Airtel. I need to activate a setting using a code(don't recall the code) through which vowifi becomes active under airplane mode. I had done that earlier and it worked. But since it had to be done everytime, it became tedious as the code was long.
Edit: just now sent a MSG from MTNL to Airtel with vowifi active and I got it.