I've been reading some of the older posts and I have to say, I found a couple of them quite amusing - like a couple who've said Pakistan has the best air force. Yes, I know, I mentioned something about Pakistan already but I'd have to say, there is ABSOLUTELY, POSITIVELY, NO WAY, TIL PIGS FLY, does Pakistan have the best air force in the world.
Hypothetically, if there was a war between the US and Pakistan and a squadron of F-22s, F-15s and F-16s were approaching the Pakistani Air Force (fllying American hardware, of course) , I'd feel really bad that we'd have to shoot down ALL of our own planes flown by the PAF.
Like someone else here said, you have to look at the big picture. China is the one to watch. They are modernizing their entire air fleet. Numbers don't make it all, but it sure helps. Russia lacks the finances, why else are they selling their Mig 29s and Su-27s to everyone else? For most of the European nations, it's about economics -what they can afford to have. South Africa - is NOT the best in the world, PERIOD. They have limited resources. ISRAEL deserves to be on this list - they do have some of the VERY BEST dogfighters in the world - they have to - they're surrounded by nations who want to destroy them - GO ISRAEL!!!
Overall, the United States has the best airforce - 1. the US has the resources - the planes and the pilots 2. the latest, most lethal equipment - F-22s and F-35s, upgrades for current fighters, most transport planes, early warning radar planes, etc. 3. most training available to pilots 4. financial resources and fundings 5. the cooperation and combined efforts of 2 other air forces - the Navy and Marines and to some extent the US Army (AH-64 Apaches and other types of helis).
It's all these combined resources that make the US Air Force the best in the world.