I flew into Copenhagen twice: one from LA and one through Copenhagen from Stockholm on my way back to LA. Copenhagen is quite large and has many public transportation options to get to the city including tram and train, which is 40 minutes away from the airport. The DOT app is helpful for navigating routes. There are machines to purchase tickets. The tram is not direct but comes more frequently and is located on level of terminals. The train is downstairs. The airport security is very strict with liquids in hand luggage so prepare in advance. Word to the wise: The train to the airport from the city can be very delayed so make sure you give yourself plenty of time. The most notable information is with regards to international flights if your EU flight is delayed. Provided that you use the same airline and are passing through Copenhagen on you're way to somewhere like the US, the airlines are aware and have systems in place. My flight had already boarded and the departure time was steadily approaching. With five minutes to spare, I was very concerned about catching the flight particularly as gate E124?was through an additional security passport checkpoint and the line was 50+ people deep. The security staff was notified about the delayed flights and opened a line solely for us late travelers. We were told not to worry - they were waiting for us. I believe they also waited for our luggage to be transferred to the plane. Protip: according to a local, if you do miss your flight due to delay or cancellation, there are ways to receive a financial allowance for the hassle. read more