I'm looking into directly exchanging ETH to LTC.

I was looking at Changelly and my Exodus wallet for exchanging ETH to LTC.  I don't have a Changelly account and I've read some horror stories out there, but any ways, Changelly seems to have better rates than Exodus, says I'll get more LTC from 1 ETH... now the question is.. how fast are the transactions? 

I see people mentioning bittrex.com and bitfinex.com, I should go and look into them more.

I have a Kraken and a Poloniex account, and from what I understand... I cannot do a direct ETH to LTC exchange on either one... seems like BTC is always the base standard to transform into anything.  Is this a correct assumption?