The flights will be operated twice a week, Tuesday and Saturday for Hanover, and Monday and Friday for Billund, the airline announced Tuesday.
Tickets for the new destinations are already available on the company website and may be booked for prices starting at RON109.
The airline carried 4.5 million passengers last year to and from Romania and estimates 6 million passengers for this year.
Wizz Air will increase its fleet to 20 aircrafts by the end of this year and will operate from nine airports in Romania.
Wizz Air currently flies 118 routes to 16 countries. With the two new additions in December, Wizz will fly 45 routes to 18 countries from Bucharest.