Lyft recently expanded their coverage area to use 485 as the basic perimeter so they can pick up at the airport now.
UberBlack has been able to do airport pickups for a while ($45 flat rate to uptown which is more than the $25 flat rate yellow cab), but now UberX can do airport pickups as well. I assume it's metered but I haven't tried yet. From my house in SouthPark to the airport on UberX it is $26 without traffic. It would be over $30 in a cab.
The links are normal (as in not affiliate) links. I do have promo codes for Lyft and Uber if you don't have a code from anyone else and you can PM me.
Lyft in Charlotte is currently in "Pioneer" which means if you are brand new to Lyft, your first 2 weeks of rides will be free up to $25/ride...no code needed. This is city specific so your rides won't carry over when you go home if you live in another Lyft market.