Specifically, this applies to flights from LA and SF to Amsterdam, Copenhagen, Dublin, London, and Berlin. From Miami, you can score the discount on flights to Bristol, Brussels, Dublin, Edinburgh, Dusseldorf, Copenhagen, Frankfurt, and Cork. However, there is a catch. The deal only applies to flights to Europe, and not the return trip. That means you'll be on the hook for a regular price one-way ticket home, which will, on average, set you back anywhere between $350 and $500 this time of year. Still, you'll still end up saving a significant amount of cash for such a last-minute jaunt, relative to normal ticket prices this time of year.