Automate price changes

I am setting up an affiliate marketing site.

One of the sections will be about flights. I would love to be able to display the price on my website, but the price of flights changes very often. Is there any way to automate the price changes, i.e. that when the price changes the price displayed on my website will be automatically updated? (E.g. plugin, automation script, paid-for service etc.)

Sounds like you need to write a script that requests pricing data from the ticket provider's API at intervals of time to update your pricing database.