NEW : three flights are canceled at Philadelphia 391 major airports . NEW : A New York resident says many are `` worried about the cleanup work afterwards '' three flights are canceled at Philadelphia 's airport ; delays in Boston and New York 's .
NEW : 391 flights are canceled at New York 's three major airports . NEW : A New York resident says many are `` worried about the cleanup work afterwards '' 20 flights are canceled at Philadelphia 's airport ; delays in Boston and Newark .