For the cheapest flights to Oslo book 6 days before departure.
The most popular airlines on the route Barcelona - Oslo: Lufthansa (LH), Turkish Airlines (TK), Air France (AF).
The cheapest flights are on the route El Prat (BCN) - Gardermoen (OSL).
Direct flights last about 3h 20min.
Direct flights available 3 days a week - Wednesday, Thursday, Friday.
Direct flights: Vueling (VY), SAS (SK).