The 2018 CS Ondrej Nepela Trophy was held on September 19–22, 2018, at the Ondrej Nepela Arena in Bratislava, Slovakia.

It was part of the 2018–19 ISU Challenger Series.

[1] Medals were awarded in men's singles, women's singles, pair skating, and ice dance.

The International Skating Union published the list of entries on August 27, 2018.

Note: For this category, the 2018 Ondrej Nepela Trophy was not considered a Challenger Series event, since the minimum required number of entries for a Challenger Series event was not reached.