Copenhagen public transportation

Hello

From what I can tell, there is no 24 hour ticket for two zones only, but a city pass that is valid for zones 1-4, which includes central Copenhagen and the airport. the ticket called a 24 hour ticket is valid for the of the greater Copenhagen area, which it sounds like you wont need for this trip. The City Pass costs 80 kr, whereas a single ticket in central Copenhagen (2 zones) costs 24 kr, so you only need to make 4 trips to make the city pass pay off. You should be able to buy the City Pass at the ticket machines on all train and metro stations. http://www.citypass.dk/ I can't find any information on when the 24 hours start, so I would play it safe and assume it starts from purchase.
All public transport in Copenhagen is on the same ticketing system, so you can travel on train, metro, bus and harbour bus on the same ticket. If you buy a single ticket, it will be valid for a set amount of time (1 hour for 2 zones), so you can use the same ticket even if you change trains or bus if you travel within set zones in the set time period.
You can plan all your public transport with www.rejseplanen.dk.
Keep in mind that Copenhagen is fairly compact and very walkable, so you might not need to use the public transport that much.

My recollection is that Morten is correct about the 24 hour pass starting the clock when purchased.

Thanks!
How long would it take to walk from Nyhavn to Torvehallerne?

Google maps walking time from Nyhavn says 20 minutes. We walked from Rosenborg Castle to Nyhavn (opposite direction) and it tooks us longer than 20 minutes for a shorter walk because we were tourist and not in a hurry.

Thanks again. Will make decision to walk or ride depending on how much time I have.

I was in Copenhagen last week and walked everywhere! I only used public transportation once (metro) to get from the airport to my AirBnB. I easily walked from Torvehallerne to Christiana and back one day. You may not need to use public transportation much while you are there since the city is easily walkable.

The walk from Nyhavn to Torvehallerne should take about 20 minutes if you are in a hurry, but I would suggest either going trough the Kings Garden or through some of the smaller streets in the old medieval part of the city for a nicer walk.
Going from Torvehallerne to Christiania is a bit far on foot, so taking the metro from Nørreport to Christianshavns Torv could be a good idea. The trade off is that you don't see anything while you travel underground.

We actually walked from the Torvehallerne to Christiania, but my wife and I love to walk. It did take quite a while - we walked all the way through Christiania, out the other side, looped back around past where Noma used to be, Papiroen (home of Copenhagen Street Food, a must in my opinion), then back past the Borsen on the way back to our hotel (which was close to the Torvehallerne). If you aren't in a rush and the weather is nice, this is several hours of walking, but well worth it in my opinion.

six times there never took public transport within city...just walked and biked ...took train to Roskilde, Naestved etc....

it is a walking city for sure....everything is easy there...

We purchased the Copenhagen Two Day card on our day of arrival in Copenhagen in May 2017 at the train station after traveling from the airport, where we purchased tickets at the airport to get to the city center. We also purchased transportation to our Airbnb on the first day so we could be sure we would have transportation covered on the Copenhagen Card on our day of travel from our Airbnb to the train station for our train to Stockholm. I asked on the date of the Copenhagen Card purchase when it was activated and it was from first use. Our first use was the following day thus giving us travel on the card on our departure morning. Flew to Copenhagen on May 15, departed Copenhagen on May 18. Interestingly enough, the Copenhagen Card holder just wrote the date and time of first use. So easy.
Sonja

I am back from my trip. I ended up not using the metro during my stay. It was an easy walk from Nyhavn to Torvehallerne. After the food tour which was a lot of walking, I walked to Christiania. I put in over 23,000 steps that day and was tired, but all doable.

I recommend S-train https://en.wikipedia.org/wiki/S-train_(Copenhagen)
You can also find some other interesting portals as Swedish Railway https://www.sj.se/en/home.html#/ and Danish State Railways https://www.dsb.dk/en/, especially to travel from Ystad to Copenhagen.