Simon Calder answers your questions on cheap flights to Frankfurt and US departures that went unregistered Q Our family – including my wife and two adult children – are flying Virgin Atlantic in January 2026 from London Heathrow to Miami for a two-night stay before taking a six-night cruise around the Caribbean. We will call at George Town, Grand Cayman; Cozumel, Mexico; and Nassau, Bahamas . We return to Fort Lauderdale and fly back on the same day. The cruise agent says we would need to