8 hour train ride from Oslo to Copenhagen

I think the most scenic route would be the ferry.

The ferry is an overnight trip leaving Oslo at 4:30pm and getting to Copenhagen at 9:45am the next day.

We enjoyed our one hour flight on Norwegian Air Shuttle from Copenhagen to Oslo, and it was downright cheap.

Agree that if you want scenery, the ferry is the way to go. Otherwise, and if you have the time, consider making a stop in Gothenburg along the way.

I would like to point out that when I took the ferry, the cost of the ferry and a stateroom for the overnight crossing was less than either my hotel in Oslo and Copenhagen. So you could actually save money taking the ferry between the two and have a unique experience as well.

We were very glad to spend a night in Gothenberg along the way. I particularly wanted to visit the Liseberg amusement park, which is more like Knott's Berry Farm or Tivoli Gardens than like Universal Studios. But it's a matter of taste and time.

The overnight ferry is much more fun, cost effective (since it saves you the cost of a hotel for one night) and the first hour or so out of Oslo is extremely scenic.

My sister and I will be there towards the end of May. I booked our ferry tickets on Booking.com, of all places. Good price, more understandable information than the DFDS website and it is refundable up to two day or so before travel. I'm looking toward to the ferry!

Also, you can book shuttles through the ferry that will either pick you up in downtown Oslo before the cruise and/or take you from the port in Copenhagen into the city. It says it can be done on the boat and it looks pretty cost-effective.

This sounds wonderful. How did you go about booking the ferry on booking.com? I have tried to look it up and I can't figure it out. Any help would be appreciated.

I booked it directly on the DFDS Seaways website. Here's the link https://www.dfds.com/en/passenger-ferries?gclid=EAIaIQobChMIiYfnlqqC6AIVjJOzCh2nTgLmEAAYASAAEgLbv_D_BwE. I do recall their website being a little annoying to navigate. (It kept steering me towards round trips originating in Copenhagen.) Had to dig a bit to buy a one way from Oslo to Copenhagen. The first 2 or 3 hours leaving Oslo are very scenic. There are a lot of worthwhile perks that are included when you book the Commodore Class cabins. I thought the extras were well worth the up-charge and I'm not normally big on frills.