@mashume
Well, as there is no longer active porting effort for the Pixel 3/3XL, and no OTA "channel" or install config in ubports installer for this device, i really wonder how the OP did in first place.

Something tells me he just forced to install Pixel 3aXL image on a 3XL device, wich no one should do as those device are NOT the same.

@AppLee ok I understand your doubts, when I have a bit of time I'll try to learn UBports code and develop a prove of concept (for the moment I only develop in Python). And I'll make some tests to know if consumption in flight mode is considerably lower than in normal mode. thank you for your interest