SAS, Norwegian and Widerøe have several flights daily between Molde and the major cities such as Oslo, Bergen and Trondheim. Flights to any of these cities will take less than one hour! It takes 45 minutes by plane from Oslo to Molde. There are buses to and from the center of Molde all day, but it is also possible to take a taxi. The easiest way to get to Åndalsnes from the airport is to rent a car, but you could also take the bus 420 to Åndalsnes starting from Molde Traffic terminal.
For updated information on arrivals and departures see: Molde Airport