Traveler
Tourist
noun
You've seen that 旅行 is "trip." So who is someone who goes on trips? That is a tourist or traveler.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well. It will help if you know the reading of 旅行 already.
このスキー場に来るのは、ほとんど外国人旅行者です。
Most of the visitors that come to this ski resort are foreign tourists.
ユニバは海外旅行者が多いから、平日でも空いてないんだよ。
Universal Studios Japan is crowded even on weekdays because there are many foreign tourists.
どこの国でも旅行者向けの飲食店は高なめことが多いですよ。
In many countries, restaurants aimed at tourists tend to be on the expensive side.