It is fairly rare for upper-class sections to be located in the rear. They are usually located towards the front for a variety of reasons…
- The front tends to be quieter due to the location of the engines.
- The front tends to move the least (turbulence, etc.) due to the location of the Center of Gravity (CG) and the location of the pitch control surfaces (usually in the rear). note: it’s a myth that the plane moves the least over the wing
- The front is usually closest to the boarding door. This allows the passengers seated in the front to be the first to deplane after landing. It also means that they don’t have to walk much of the aircraft aisle(sL to get to/from their seat. Bonus: On some aircraft, the boarding door is actually positioned so that no other passengers walk through the upper-class section(s).
- There is an intangible feeling of “prestige” being seated in the front.
They wouldn’t do that… airplanes are quieter forward of the wings, because the engine exhaust plumes make noise and are right outside the rear of the airplane. Also the ride is better forward of the trailing edge of the wing, because the rear part of the fuselage flexes due to control loads when maneuvering or in turbulence; the ride feels a lot ‘stiffer’ forward of the rear wing spar (which is roughly where the trailing edge of the wing is). So, you give the premium customers seats where it is quieter and the ride is better. Also, that puts them closer to the exits once the plane arrives.
That also means that the very worst seats of all are in the last row… noisiest, and the worst ride of all. Not to mention, often those ones don’t recline, and they’re right next to the toilets.