Sir Howard's task is to bring out an interim report by the end of 2013 and then a full report in summer 2015 - after the next general election.
Mr Johnson, among others, has been critical of the timescale imposed on Sir Howard saying that the Government is moving far too slowly, with the "continued inertia being fully exploited by our European rivals".
Former Tory Cabinet minister Lord Heseltine has also been critical of the Government, saying this week that he would like to see more progress on airports and other big infrastructure problems.
All options for airport expansion are "back on the table", the man charged by the Government with recommending future aviation policy said.
Sir Howard Davies, who has been charged with interring the issue of airport expansion in the south east, has outlined his role.