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Truly universal CO2 tax would be OK with yellow vests.

Now the problem is that CO2 for cheap gasoline cars is taxed a lot. While CO2 for airplane fuel for better off to go on holidays is not. And they get tax credits to buy nice electric cars. Regressive taxation at it's best.

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If you can quantify, roughly, such tax differences, you'll have the core of an unassailable argument.

Well, here in Illinois, a gallon of diesel fuel is 85 cents per gallon. An international flight to Hong Kong will take a little over 40,000 gallons (but is tax exempt), so 34000 dollars worth of taxes are not paid per flight.

Jet fuel isn't tax exempt - there are both federal and state taxes to be paid on it

International fuel is tax exempt.

I can find no data on that, and transoceanic flight have to fuel up at takeoff airport thus can't exploit lower taxes at home hub (commonly done with shorter range flights).

You don't need data, it simply is exempt and has been since 1947.

I used to fuel commercial flights in a previous and much better life. International jets used a special ticket that said INTL EXEMPT on them.

Not meant to refute the GP argument but, in the US at the federal level the AvGas tax per gallon and gasoline tax per gallon are about the same ~ $0.19. This is probably one of those areas where subsidies and such obfuscate the reality.

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