With the Hans Christian Andersen museum closed until 2020, it is worth it to visit? We will be driving from Aero to Copenhagen and wonder if we should stop or just spend more time in Roskilde on our way to CPH.
Personally I'm not a big fan of Odense and if H.C. Andersen is your only reason to go, I would say skip it. Another place to stop is Egeskov Castle https://www.egeskov.dk/en. It's a nice castle with hedge mazes, a vintage car museum and lots of stuff for kids. Though it will take a couple of hours, so you won't have much time for Roskilde as well. But on the other hand Roskilde is a bit of a detour and also very convenient to visit by from Copenhagen.
Also you might want to post this in the Denmark forum to avoid confusion.
Are you only stopping in Roskilde on your way from Aero (and not spending any other time there)? If so, I agree with Morten, I would just get to Roskilde. The viking ship museum is awesome, and the cathedral is great too. It is a really easy day trip from Copenhagen though, a very short train ride away, so it might make sense (if you have the time) to just head straight to Copenhagen instead of detouring to Roskilde.
We did enjoy Odense, but were only there for two nights and the HC Museum was open. There is still plenty to do there though. Depending on what time of year you go, the Munke Mose park is beautiful, a great place for a picnic or a stroll along the river. There is also a ferry that takes you leisurely up and down the river. Near the southern end of the boat trip, there is an outdoor museum (setup like an 18th century Danish Village called Den Fynske Landsby, which was pretty neat. Odense also has a nice, compact old city, with a beautiful cathedral. So there is still stuff to do there.
Odense also has the railway museum. I haven't visited since I was pressed for time on my last visit to Odense and decided to visit HCA museum and house instead.
I second Morten. We went to Egeskov Castle 6 years ago. My kids LOVED it and so did my husband and I! They had so much fun, when we go back this summer, it is towards the top of what my daughter wants to do again (she's now 17) and I'm really looking forward to it as well. The treetop walks are fun as were the hedge mazes. We won't pay to go into the castle itself this time. We did last time and were kind of disappointed. We probably spent 3-4 hours there which was a perfect break for us driving from Copenhagen to Ribe on the other side of the country.
Thank you all for your replies. The castle is on our list as well!