While you are here, you should take advantage of the close proximity to Europe. There are many ways to get around Britain and Europe. You will need a passport to leave mainland Britain. You can get one after you arrive but it is less hassle if you get it while you are still in the States.
It is easy to find a cheap flight to and from mainland Europe. There are a few cheap airlines, Ryan Air and Easy Jet. Remember to pack light as they charge for checked baggage. Free carry-on luggage must weigh less than 22 pounds. Just be careful about all the fees that they try to add on. My husband and I have become seasoned travellers and can travel without very much. Here are some great tips. The flight requirements for liquids in carry-ons is universal and in case you don't know what they are please read this.
If you have children,what each airline always for carry-on and to be checked varies so always read the company's website.
Here is a great tool that tells you when you can get cheap tickets to Europe. Another useful website is Skyscanner.
Places to find airline tickets
You have to shop around in order to find the best price. Here are some great tips.
Airports in the London Area
Heathrow (largest)- usually flights to and from the U.S. go through here.
I have used Purple Parking while Jon and I went away to Thailand for two weeks. It was very affordable and I was really impressed with the setup and service! I do not use them when flying out of Stansted, I use the meet and greet instead.