Fly to the UK. Flying back to the UK after your holiday can be a smooth process if you plan. Start by checking your flight details and arriving at the airport with plenty of time to spare. Make sure you have all the necessary documents, including your passport and boarding pass. If you have any duty-free items, keep them easily accessible. During your flight, stay hydrated get up, and stretch your legs periodically. Once you land, be prepared for possible long queues at passport control. With a little preparation, you can make your return trip stress-free.