https://bitcoinfees.earn.com
You can pay as much or as little as you want in fees. That website shows you the exact wait time and which block your transaction will occur in based on the fees you choose.
The fee is determined as SATOSHIS PER BYTE. The number of bytes in a transaction is about 230.
The median fee is 510 satoshi/byte which is 0-25 minute transaction time at a cost of 115,260 satoshis (0.00115260 btc) or USD$13.
If you want to pay USD$13 for near instant bitcoin transactions, then go for it.
You also have the option of paying 13c and waiting 19 hours.
The fee is up to the user.
