So is everyone going be forced to have vaccine passport to fly?

Airlines are private businesses and they can do what they want.

Let's hope so. Airplanes are unhealthy enough as it is.

they'll lose the business of difficult customers. So what?  Rational customers will be more willing to fly. 

The current US government would love that, but won't be able to pull this off based on a legal conflict. But it's possible that the airlines will require their customers to either show a vaccine passport or a very current negative Covid test in order to board a plane.

Then again, it's possible that the current administration will try to pull this off anyway, in which cases it would take many years until the Supreme Court overturns it. By then Covid will be long forgotten.

Nope. A state or government issued picture ID is all one needs to board a plane.

Passports can be used as ID if you have a passport. But Passports are ONLY necessary if you are leaving/entering the continental USA or otherwise traveling out of/into your home country.

It depends on the country you're flying into. It's likely it'll be proof of a vaccine, or a negative COVID test. 

Plus a face mask. 

It's not about business; it's about preventing the spread of the disease. Restrictions aren't set by the airline, but the airlines will need to ensure passengers are compliant to avoid them being rejected for entry when they land (at which point the airline's likely to have to return them home)

Airlines won't allow anyone to board to fly to a country where they will be refused entry if they haven't got proof of vaccination. They will temporarliy lose business from younger people who haven't been offered the vaccine yet. But without a "vaccine passport" they would lose business from people unwilling to risk spending time in close proximity to potential coronavirus carriers.

Vaccination might not be totally effective in preventing somebody getting COVID but it still considerably reduces the potential for them to spread the virus if they do. A normal facemask only reduces the volume and range of virus droplets expelled by an infected person. I wouldn't want to sit next to somebody in a confined space only wearing a mask.

Hicks dont fly. 

There are many countries that require vaccinations for entry.  Polio, yellow fever and a few others.  If hillbillies traveled you would know this

The first International Certificate of Vaccination against Smallpox was developed by the 1944 International Sanitary Convention[1] (itself an amendment of the 1926 International Sanitary Convention on Maritime Navigation and the 1933 International Sanitary Convention for Aerial Navigation).[2] The initial certificate was valid for a maximum of 3 years. - so this is nothing new.

Seems that way for now.  There are people that are fighting this.  98% survival rate. Proven fact that even fully vax you can still get the virus and spread it to others.

To other countries,yes