The best solution is not to fly at all. I know people who, unless the distance is over 1,000 miles, drive to where they're going. It's a grind, but since flying is now about as much fun as pulling your brains out through your nose, it may be preferable. And in any event, I have it on good authority that the major carriers will soon be charging for the air they pump into the cabin. If you pay a fee, the mask drops and you get to breathe. If not, you're on your own, and they hope that you enjoy your flight and look forward to seeing you again.