The full-back admits the campaign will not be complete until they return to Tannadice with the Active Nation Scottish Cup this weekend.
United now face their final challenge of the campaign and an opportunity to claim the Scottish Cup for the first time since 1994 if they can overcome Irn-Bru First Division side Ross County.
"I think if people are being honest, they didn't expect us to do what we have done," said Dillon.
"The players deserve a lot of credit, as do the staff, and the manager deserves a huge amount of credit.
"We are delighted but it doesn't really mean anything until we come back to Tannadice with the cup."