The protesters temporarily shut down the main entrance to Teterboro Airport in New Jersey and also picketed at airports in North Carolina, California and Washington State.
French lawmakers heaped criticism on Paris Saint-Germain's coach on Tuesday after he fobbed off concerns about the team's use of chartered flights during a national drive to save energy.
Johnson is among many world leaders and business executives who chartered planes for travel to the United Nations-backed conference, which is focused on securing commitments from heads of state to lower carbon emissions.
With passenger numbers growing and time to slash emissions dwindling fast, the aviation industry must tackle urgent stumbling blocks on fuel, frequent flyers and more.
