Neutral term for a person traveling for leisure or sightseeing, often used in contexts like tourism, hotels, and travel guides.
This hotel is bustling with many tourists.
旅行客向けのパンフレットをもらった。
I received a pamphlet for travelers.
Compound of 旅行 (travel) and 客 (guest, customer). The exact historical derivation is uncertain, but the word is transparently formed from these common elements.