Is it near impossible to take a big plane on a domestic (U.S.) flight nowadays? My wife hates flying and greatly prefers bigger planes. We searched flights going from the West and Midwest to the East Coast and even flights from one coast to the other (SEA to JFK, for example) and they all seem to be various hopper flights on planes like the RJ-900 or the smallish 737 at the largest (and even those are short).

Do airlines just not fly the bigger jets like the 747 or the 757 domestically anymore, except maybe LAX to LGA? It seems like you pretty much have to be flying transcon to fly a bigger jet now, no? It also seems pretty much useless to fly first class on the smaller jets too, because the seats are barely bigger and the service isn't that much different ($500-$1K extra for a bottle of water and an extra smile, no thanks).