The biggest time delay is getting through security and boarding, then waiting for baggage claim. 1) TSA stuff doesn't keep anyone any safer 2) protectionism:

The biggest time delay is getting through security and boarding, then waiting for baggage claim. 1) TSA stuff doesn't keep anyone any safer 2) protectionism: foreign carriers are banned from flying many domestic routes. We'd have more capacity and throughput, as well as lower prices. 3) boarding algorithms are silly and could easily be improved by letting passengers self-select into fast vs slow boarders and letting fast get on/off first. 4) incentives for crew flight time / overtime / limits create scenarios where passengers are made to wait on the tarmac for no good reason.