Is it only me or was the link to the chat removed from travel? Right now, the only way that I see is to scroll to the bottom, where the site-wide chat is listed, click on that, search for the travel chat and then go there. Should we not at least have it under "help"?
Click on “Stack Exchange” at the top left. There is a list of sites, starting with the current site and the meta site. Next to the main site, there is a link to chat.
If you're missing something else from the old top bar, see New top bar quick reference guide / Where has the link to gone? on the main meta.