Currently the fee to withdraw bitcoin from bittrex is 0.001BTC or 2.607$, money is money and you don't want to pay such high fees to transfer your bitcoin to another exchange.
Don't worry you can pay less then a cent to transfer those bitcoins to another exchange, or better yet, you can actually make money on the transfer.
It's really simple!
First you find the cryptocoins in common between the two exchanges, you can use coinmarketcap to find them.
For this example we're transferring from bittrex to yobit(maybe you've gone insane idk):
The coins should have at least more then 1% volume.
Now we compare the prices between the coins:
In this example we are transferring 1 BTC.
Obviously the amount of coins directly influences the profit, the mathematical expression is a simple linear function (y=mx + b):
(PRICE_DIFF * N_COINS - FEE) = PROFIT
Ok, so the highest profit seems to be etherum at 20.13$, so now what you do is:
And there you go, you actually made money instead of losing money changing exchanges!
I reckon a bot could do this and make decent money transferring between exchanges.
That will be all, peace out.