1. Percy Jackson and the Olympians series: The Percy Jackson series is my favorite book series and since due to the quests there's lots of travel around the United States I would say that it counts as a travel book as well and I just really really love the series.
2. The Heroes of Olympus series: The Sequel series to the Percy Jackson series also includes a lot of travel also due to the quests but this time the quests takes the characters out of the country as well. I also just really love this series in general as well.
3. Heist Society series: I love the Heist Society series it's just such a fun series to read and due to having to run various cons all over the world the characters travel all over the world in style.
4. Tsubasa Reservoir Chronicle: This series is about a group of travelers who have to travel to other dimensions in order to achieve their goals, I really love this series and it's characters in general but the whole concept of dimension hopping makes the series even better in my eyes.
5.Uglies: The first book of this series has Tally travel to the smoke and while I didn't really find her travels all that interesting I overall loved the book while she wasn't on her way to the smoke.
6. Magic Knight Rayearth: This is a great series that has the three main characters setting off on a quest of sorts to save the world they were recently transported to.
7. A Song of Ice and Fire series: Now while this book isn't about traveling in each book at least one character is travel from one place to another so it does fit with the theme of having traveling in books. I really love the series in general as well.
8. The Fault in our Stars: I really overall loved this book and at one point in the book Hazel and Augustus travel to Amsterdam so it counts as a travel book as well.
9. The Awakening: The second book of The Darkest Powers series is technically a book that involves travel but really it seems a lot more like being on the lamb with the whole having to make sure no one recognizes you and the whole reason for the journey is to get away from some people but being on the lamb is a form of travel so it counts.
10. The Kane Chronicles: This series is much like Rick Riordan's other books where their a certain quest the characters go on and therefore they need to travel all over the place, I've only read the first book so far but I loved it.