This article says train is ~50% of air. According to this quick google that makes the cost range a 3x to 18x of sea freight cost. https://www.transporteca.com/

This article says train is ~50% of air. According to this quick google that makes the cost range a 3x to 18x of sea freight cost. https://www.transporteca.com/transportpedia/sea-freight-air-freight/ https://www.transporteca.com/transportpedia/sea-freight-air-...