Pedro Martínez: The explanation you provided supports what that link Marfitalu gave us and the book I have. So I guess it's all clear now what the difference really is.

English is full of words that are different in English, but in Farsi we use the same, or almost the same words for them.

Trip, Travel, Journy, Voyage, Excursion are a few such words.

I know how voyage is different from others, it's a trip by sea, but the rest are quite similar.

Take these examples:

1) My ... to work took more than 2 hours this morning.
2) For our holidays next year, we're going on a ten-day ... to Australia.

3) We always go on a day ... to France in December to buy Christmas presents.

4) The price of this holiday includes a full-day ... to a place of cultural interest.

5) He's hoping to go on a(n) ... to the Himalayas next year.