On CO or AA, I would say yes--and maybe even a meal depending on what your definition of "relatively short" is...on US, no. On US, the fare would be non-refundable and in Y, e.g., PHL-BOS.
Pre-Parker and Post-Parker I made the suggestion that with the increase in use of RJ's with no FC they should give US1's some drink coupons every year. They didn't like the idea. CO does exactly that. I get drink coupons with my Platinum membership.
Southwest FF drink free, water, cokes, energy drinks and booze. They also get more than enough coupons to give to the pretty lady or boy stranger next to them as a nice introduction. Kind of tradition for WN passengers. And King, while your enjoying that $800 PHL-BOS fare, note that WN caps its largest walkup fare at about 350 for a coach ticket and gives you a leather seat, nice legroom, free pillows, free blankets, no charge for aisle/window/exit, no fees to actually give your money to a ticket agent or phone rep (they want your money and will make it very easy to give it to them) no change fees, no sky cap fees, smile when you ask for a full can of coke, and even on a 35 minute full 737 between CRP and HOU do a full drink service, come back, look you in the eye and ask if they can get you something else. That my friend is what US has not figured out. They are not in the transportaion business, they are in the customer service business!