Opposite of getting off plane. Starts with R and is 14 letters.
To find the opposite of getting off a plane, we can think of a word that means entering or boarding a plane.
The word that fits this description is "boarding."
However, "boarding" is not 14 letters long. So, let's try to find a synonym for "boarding" that is 14 letters long.
To do this, we can use an online thesaurus or a word search tool that allows us to search for words by specifying the length. By searching for 14-letter words related to "boarding," we can find the opposite of getting off a plane.
Using an online thesaurus or search tool, the 14-letter word that we find as an opposite of getting off a plane is "embarkation."
Therefore, the answer to your question is "embarkation."