If you’re heading out after breakfast, the simplest move is the M2 Metro from Lufthavnen straight to Kongens Nytorv; it’s usually about 15–20 minutes on the train itself, and with the walk from the hotel plus a little buffer, plan on roughly 20–25 minutes total. You don’t need a taxi or car, and I’d leave around 8:15–8:30 AM so you arrive before the busiest late-morning crowds. Buy a ticket on the app or at the machines, keep your luggage light, and expect an easy, very Copenhagen-style commute: clean, frequent, and straightforward.
Start with Nyhavn while it’s still calm. In the morning the harbor feels much more local than the postcard version you see at noon, and it’s the best time for a slow walk along the water, a few photos, and maybe coffee at Café Gammeltorv-style prices only if you’re okay paying tourist-center rates; otherwise just grab something simple and enjoy the view. From there, drift into Kongens Nytorv and pause by The Royal Danish Theatre to take in the square and the elegant facades around it. This whole stretch is easy on foot and should take about 1–1.5 hours if you linger a little.
Next, walk or take the Metro one stop to Nørreport for TorvehallerneKBH. This is the best place in your window for a proper late breakfast or early lunch: think rye bread smørrebrød, pastries, eggs, coffee, or something more substantial, usually around DKK 120–200 per person depending on how much you order. It’s lively but manageable in the late morning, and you can either graze or sit down for a full break. After that, head to Kongens Have (the Rosenborg Castle Gardens) for a quiet reset — a very easy walk, lots of locals on benches, and a pleasant route if you just want to wander for 30–45 minutes without rushing.
Finish at Rundetårn (The Round Tower), which is perfect for this kind of short city morning because it gives you one big “I’ve been to Copenhagen” moment without eating the whole day. The spiral ramp is the charm here, and the view from the top is worth it if the weather is clear; budget about DKK 40–60 for entry, and give yourself around 45 minutes including the climb and a little time at the top. If you’re heading back to the airport after this, it’s easiest to return from Nørreport or Kongens Nytorv on the M2. Try to leave the center by 11:30 AM or noon so you’re not stressed — that gives you a relaxed ride back and plenty of time if you want one last coffee on the way.