The DAI LogoDAI-Fee.info

The current cost of a DAI transaction may be determined as a function of three variables:

We then have:

(transaction cost) = (gas price in ETH) * (gas used) * (exchange rate)

By offering to pay more for gas, you can make your transaction faster. This page uses ETH Gas Station to determine a sensible gas price, which allows for transactions to complete in ~2 minutes.