By Madison Williams The star free agent has spoken out about the league’s use of commercial flying before. Breanna Stewart once is speaking out against WNBA teams’ use of commercial flights, but this time she has an idea to help improve the situation. The league has yet to establish charter travel for all teams, like most professional sports franchises, so Stewart wants to help. “I would love to be part of a deal that helps subsidize charter travel for the entire WNBA,” Stewart tweeted on Sunday. “I would contribute my NIL, posts + production hrs to ensure we all travel in a way that prioritiz…