For a short flight, I would not pay much.
We have been able to fly business-class to Europe on our last six trips. We have quite a few frequent-flyer miles and we use them on longer flights to get first or business-class.
Unfortunately we just don't get any service on short domestic flights.
Carnival Liberty New Year's Eve 2007
Liberty of the Seas 5/2008+11/2009
Allure 1/16/ 2011
Vision OTS 2-14-2015
Freedom OTS 3/6/16