Move level and package from UDK to UE4

Just wondering if there is a way to move stuff from udk to ue4. i have old files i used on udk and was wondering if i could by any chance bring the udk and upk files and open them in Unreal 4

The only way is to export the stuff out of UDK (right click export) and then import it into the UE4 -> unfortunately it is not possible to open upk or udk files