Burnley were given a scare by the Scots over two legs, and it eventually went all the way to extra-time before the 'Clarets' prevailed.
"Credit to Aberdeen," said Dyche. "I thought they were excellent in both games, they certainly came out to try and make it a game and not come to defend.
"I would say there was a couple of interesting decisions. We did finally get a penalty so that was good. There were other decisions which I thought certainly didn't favour us.
"Equally their keeper I thought was outstanding. We kept probing and looking to break them down and we did on a few occasions and then we did on a few occasions and their keeper pulled out some marvellous saves. Overall I am very pleased, it was a tricky tie.
"I think our fans just literally wanted to get into Europe so we have given achieved that for them now! There were a lot of positives but also a lot of work to do."
Dyche's side face a tough trip next week to Istanbul Basaksehir, just days before the Premier League season gets underway.