Also, to answer the question in the post: adding a stop at LaGuardia between Boston and Washington (National) adds zero meters (http://www.gcmap.com/mapui?P=bos

Also, to answer the question in the post: adding a stop at LaGuardia between Boston and Washington (National) adds zero meters (http://www.gcmap.com/mapui?P=bos-dca,+bos-lga-dca&DU=m http://www.gcmap.com/mapui?P=bos-dca,+bos-lga-dca&DU=m)