I'm new to slushpool. If I withdraw a balance higher than .01 btc, there is no fee correct? How long will it take to arrive in my wallet at bittrex?
Correct, there are only two types of fees that are incorporated in slush payment system. The first one is stable (pool fee 2% per block) and is used to cover the pool expenses. The second one is introduced only if you set your payout threshold below 0.01 BTC and it equals 0.0001 BTC.
Transaction fees for threshold equal to or higher than the limit value are covered by the pool.
How long, it might take more than a few hours depending on the cold and hot wallet movements in slush.