lentoihin

Lentoihin is a Finnish grammatical form that functions as the illative plural of the noun lento, meaning flight or air travel. As an illative, it marks movement toward or into a destination that is conceptually plural. In other words, lentoihin indicates “to the flights” or “into flights” when the reference is to multiple flight events or a collectively treated sense of flights.

In Finnish, the base form lento has nominative plural lennot (the flights) and genitive plural lentojen (of the flights). The illative plural lentoihin is formed with the illative plural suffix -iin/-ihin attached to the stem lento-, producing a form that is used in contexts where the destination or related activity is regarded as a plural set rather than a single flight. The form is relatively formal and appears most often in written or technical language, travel industry discourse, or grammatical explanations.

Usage notes and distinctions: lentoihin is different from lentoon, which is the illative singular meaning “to a flight” or “into a flight,” used for a single flight. It is also different from lentojen, the genitive plural meaning “of the flights.” When speaking or writing about multiple flights as a category or when the action concerns entering or moving toward multiple flights, lentoihin may be the appropriate form. See also Finnish case system and noun inflection.