For my final day I was taking the train back from Central Station to the airport. There is the express Flytoget train or the cheaper local line that stops at the aiport.
I was going to take the local train for 105K ($15 Cad). There are English options at the ticket machines. The only difference with the express train is it makes one stop in Lillestrom.
See vlog of how to get to the airport - https://youtu.be/GQc8w-olozQ
2025-05-23