I've stayed now (for work) a few times at the Comfort Hotel Copenhagen Airport. It can be reached easily from the terminal with a 5 minute walk. You can book a room with airport view during booking. These rooms are on floor 7 upwards, but the higher the better. From your room you will have a view on runway 04R-22L. If you're high enough, you can also see runway 04L-22R. You will also have a view on runway 12-30 but that one is not often in use. Photography is not possible as windows are quite narrow and very thick, the distance is also a thing.
If you haven't secured a room with a view, don't worry! On the 10th floor, they have created the "ViewRoom". This is a very nice space with full view of the airport. You will miss nothing from there but you'll need very good bins and FR24. Same as the hotel room, photography is near impossible due to the glass. From the hotel, it's a 10-15 min walk to the approach path for runway 22L. It's close to the long-term parking P15 and P17. If you walk further down the road towards DHL, you can also take photos of aircraft departing from runway 04R if needed.
https://maps.app.goo.gl/beYVp7T2tKYipFAt7
Credit Anton Homma
