German Carnival Corp brand AIDA Cruises has delayed its re-entry into the European market until September, having already frozen North American sailings until next year.

The owner of 13 vessels will hold off on intra-European travel through August since "conditions for safe travel do not yet exist in many destinations worldwide", it said Thursday.

AIDA said the suspension does not apply to ships 3,300-berth AIDAprima (built 2016), 3,300-berth AIDAperla (built 2017) and 2,050-berth AIDAdiva (built 2007) but would not explain why they were excluded.