If you want to build your itinerary by yourself, Hyperdia will help you a lot. This site is transportation search engine. You can search the timetables and routes of all trains, flights and airport shuttle bus. But this site is a bit tricky and too many functions and options to you. This guide will help you to find the way to use this site.
Copy and paste this URL into your WordPress site to embed
Copy and paste this code into your site to embed