Interesting fare comparison-
If you book AA from Houston to San Diego, leaving tomorrow morning and returning Friday afternoon (typical last-minute out-and-back business itinerary), the R/T fare is $875.30.
Same dates, originating at DFW (including, just for fun, flying on the same plane as your Houston-based compadre, who is connecting at DFW), AA exacts $1,318.00 from you.
Key difference? Southwest offers service HOU-SAN, is not allowed to offer DAL-SAN. Southwest caps fares at $299.00 one way. AA caps them at... well, what can you stand?
Somehow, we are supposed to believe that this ONE airport needs to have these restrictions.
Perspective: When the Wright Amendment was passed, DFW had a very healthy mix of airlines competing and providing originating long-haul service. Braniff was dominant, AA was no. 2, and you had significant long-haul service from Eastern, Frontier (the first one), Continental, Delta, Ozark, and Texas International.
Also, do not forget that the original legislation was not the result of a well-publicized and debated legislative process; it was an add-on ("amendment," remember) to a completely unrelated bill. Jim Wright's gift to DFW Airport.
Also amused that DFW needs to be protected from competition from DAL, but the substantial and very valuable service and infrastructure at the other airport owned by the City of Ft. Worth (AFW, Alliance), is somehow insignificant (FedEx widebodies coming and going, substantial sorting hub, very large AA heavy maintenance base)- these could have been at DFW, too, but... well, you get the picture.
Bottom line is, it is about protecting AA's ability to charge confiscatory fares for travelers to/from the north Texas area. It is bad for business here, too.