If you live in Central Texas you should seriously consider taking a flight from Austin, Tx to London Gatwick in the UK. You can find some great deals on direct flights through Norwegian Airlines. The great thing about flying into Gatwick is the fact that once you land you are a 35-minute train ride into the center of London with all that London has to offer. Spend a day exploring the sights, see Buckingham Palace, Parliament and Trafalgar Square -all within walking distance of one another. If you are only spending a day head back to the airport to one of the many fabulous hotels that Gatwick has on offer. The next day you can head out to just about any major city in Europe. From Gatwick you can get to just about anywhere in Europe return for under $100. I opted for Belfast this trip and flew Easy Jet.
If you are planning a trip to Europe, I would suggest considering London Gatwick as a possible layover as it is so easy to get into central London from the train station at Gatwick. If you have a few hours to spare you can easily get on the train and be at London Bridge station in 30 minutes. From there it is two stops to Charing Cross which is a block away from Trafalgar Square. If you can't check into your hotel right away or if you just have a long layover leaving your luggage is safe and easy at the Left Luggage Station. Buy a ticket for the train ( mine was approximately $20 return for off peak hours).