Flytoget is one of the cheapest, fastest comfortable means to get to the airport. Cheap for Norway, of course. There are other ways to get to the airport, cheaper, but not as convenient.
The train is located on the station's ground area, and you can buy the tickets through their website, through their app, or just at the station by using their ticket vending machines (using cash or credit card). At working hours there are different staff members helping customers with the machines.
Trains run very frequently, so if you miss one, another will be there in about 10-15 minutes. And the train being a specific service to the airport, it is very punctual.
The train is fast, has short stops in different places between the airport and the central station, and is very comfortable. There is a screen with scheduled flights arrivals and departures and some tourist info.
Taking into account the prices of everything in Norway, the ticket is OK. Children under 16 travel for free if accompanied by an adult; half price for kids from 16 and 20, students from 21-31yoa and retires over 67, and full price for adults without a concession.
The only thing I disliked is that the carriages have no ramps to the platforms, so you have to move your suitcase inside by using your muscles, which is not great if your suitcase if very heavy. Also the space devoted to the luggage has not barrier or stopping bar, so the suitcases with wheels tend to move in and out the compartments.
Overall, very good. I will take it again if I return to Oslo.
