I don't know about the US, but in the EU, aviation only contributes 3% (that is not a typo. Three percent) of the total greenhouse gas emissions (measured just before corona--so there was a shitload of aviation going on).
The major greenhouse gas emitters are electricity production (30% - mostly gas generators!), road transport (20%), industry (20%). Source: European Environment Agency
So I wouldn't worry much about the climate impact of flying.
So I wouldn't worry much about the climate impact of flying.