Airport Hacks
22 Airport Hacks to Remember Before Your Next Flight
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If you're travelling to the USA and you don't mind paying a fee ($100) this programs allow you to bypass long lines and get into another country twice as fast. Check to see if you can apply for global entry.
If you're travelling within the EU or arriving back in the UK and you have a biometric passport, look for E-passport gates. These automated gates are almost always the fastest way through security.