Any school which gets you your ratings with safe and reliable airplanes and instructors. Larger "Glossy-brochure" flight schools usually overcharge by 200%-400%. If they have promotional videos showing beautiful students about to embark on an airline career (even though almost no airlines are hiring), that is a sure sign they are going to rip you off.

The best information is to be had by talking to current students and instructors. The students are usually honest, and the instructors might be although they might also be desperate for work.

These are probably reasonable price ranges, depending on location:

PPL/IR/COMM/CFI/CFII ASEL: $30K-$40K

ME/MEI: $4K-6K

Aviation employers will give you NO, ZERO, NONE WHAT-SO-EVER hiring preference for going to any particular school. They all hire based on experience, measured in flight hours. For this reason you want cheap as possible, but still safe and reliable. You do not need to spend $80K+ for that.

The only exceptions are:
- US Military Flight Training
- Certain internship programs available to students at some aviation universities.