Hello, I have a 7:15 am flight tomorrow from CPH>LHR>IAH. I have already checked in online and have one checked bag. Do I need still to arrive at airport 2 hours prior or 1 hour suffice. I understand metro runs 24/7 but thought taxi may be a better option. I'm staying at an airbnb 5 mins walking distance from DR Byen. Where can I get a taxi that early? How much would it cost to the airport? Thanks!