I know it is kind of redundant to talk about help when the app has all the help content updated with each version of its major releases. For many users who want to get it quick , they search for solutions on line and since these apps are the new OS artifacts , there is some tribal knowledge on them.
There are a bunch of apps on the Windows 8 OS that have a uniform help structure. They are all powered by bing and they are content rich . The Travel apps help section can be reached as follows.
Open the app and then swipe from the top , ( or pull up the bottom edgy )
Now tap n the Help button on the bottom right .
The help page is also accessible from Settings panel. For that, use the charm or swipe from the right [ keyboard shortcut for the keyboard power users isa Windows + ‘C’ button ]. See below for the Help section
Other than that , there is another way to reach the help section , which is called the Next Steps. The Next steps section also has a ‘todays tip’ section where a new trick will be shown. Next steps has shortcuts to various other paths around the app that you could take.
The help button on the bottom edgy is there on multiple pages in the app and you could go to it fro anywhere. Once in the help section , you may see only a few tiles that are places according to the resolution of your device and the layout [ portrait or landscape] but there is more to it that you can see with naked eyes 
use the Chevrons to go deeper for a cast array of videos on how tos and topics
Tap on the Topics or the Videos [ or the Chevron ‘>’ ] here and you will get into a deeper page with all the help that you ever wanted.