'Rover' tickets for internal flights?
I'm in the very early stages of planning a trip from the UK to visit some American friends who are geographically spread out (Raleigh, Portland OR, SLC, Dallas).
I'm well aware of the distances between these cities, and that trains are either non-existent or will take a long time, so obviously I'll be flying.
In the UK, there are 'Rover' or 'Ranger' tickets for trains, where you can travel on as many trains as you want within a certain period e.g. 14 days. They're a fixed price, so the more trains you travel on, the better value it is.
Does such a thing exist for US internal flights, even if tied to a specific airline?