Phx to bos - It takes around 6 hours 34 minutes to fly from Boston (BOS) to Phoenix (PHX). What are the most popular airlines that fly from Boston (BOS) to Phoenix (PHX)? Airlines with flights from Boston (BOS) to Phoenix (PHX): Jetblue Airways , United Airlines , American Airlines , Delta Air Lines , Aer Lingus , TAP Air Portugal , Qatar Airways , El Al and Alaska Airlines .