how much a taxi should cost in NC? Is it cheaper if you buy roundtrip?

Answer 1

its usually cheaper if you book a round trip, however time is what makes the difference. If you are going to get dropped off and have a long time before you need to return home it may be worth it to do 2 one way fares, costs depend on what town you live in.

Answer 2

You need to be more specific, but when I've gone to Durham, I've often gotten the cabbie's phone number on the way in from the airport, and then negotiated a lower rate to take me back