Ledley, 25, has been a mainstay of the Celtic side since his move from Cardiff two years ago and the Wales international has targeted progression in Europe this season.
He also maintained it would have still been a priority if Old Firm rivals Rangers had been accepted into the Clydesdale Bank Premier League in their `newco' form.
"Qualifying for the Champions League is massive. It would still have been like that even if Rangers were still in the league," he told The Sun.
"As players, you just want to get to that stage. It's a fantastic tournament - one of the best if not the best in the world. That's our aim this season and hopefully we can achieve it.
"We gained a lot from the Europa League last season. We enjoyed it even though we had an extremely difficult group."