For whatever it is worth I have often thought of purchasing a 4 piece just to carry on planes during travel, but the few times I have gone with the two piece rods I have never had to check them. I just always ask the stewardess if she would mind putting it in their closet or the closet in first class, so if you haven't asked it may be worth a try. Don't ask the people at the gate ot ticket counter. Worst that can happen is the stewardess makes you check it plane side. I have not been turned down yet.