Just confirming, at least on Southwest out of Atlanta and back from Denver, that I was able to carry on my Fishpond Medium length (37″). I have one of those Fishpond sling packs that has the slot for the net, so I just left it in there and walked right on. I pull it out to fit better in the overhead bin, but no troubles at all. It was more of a talking piece than anything in the airport, haha. Security, Flight attendants.. They were really just interested. I also strapped my rod tube to the sling pack. The whole thing counted as one carry on. I figured it was one of those “ask for forgiveness” kinda things, as they’d gate check it at worst.. (My buddy did the same thing, sans the sling pack, by strapping his to the Orvis rod case.)