3. They Don’t Tell You About the Lines
So, at the moment, EU citizens traveling through airports get to go through a different line at security when they’re traveling through the continent (just like Americans do in the U.S.). That may change in the future — which would require any Europeans traveling to the UK to stand in the foreigner line when entering and exit the airport. Just something to consider.

4. If You’re Hitting the UK, Stay There
For those travelers lucky enough to be heading somewhere in the United Kingdom this summer, you should really think twice about venturing outward, because it just might be more expensive when traveling from the United Kingdom to Europe. The once cheap airfares the UK enjoyed as part of Europe’s open skies policy may change.
