[Travel] Departure & Return text is difficult to read in desktop

@spacedino not sure if this was how the original mocks were, but the departure and return text is difficult to read (or even see) in desktop.

Locate the Travel desktop template and the styles controlling the Departure and Return text, then inspect how those labels render at desktop sizes. Confirm the readability problem against the current page and identify the smallest relevant styling change; done means both labels are clearly visible and easy to read on desktop.

Written by the indexing model from the issue text.