The cheapest Oslo to Osaka return flight on the radar right now is €817, flying with Lufthansa + Air China + Brussels Airlines via one or more connections. It covers departures in January 2027, and every dated link below opens that exact OSL–KIX search on Skyscanner. That is roughly 22% below the €1,041 this route usually costs. Across 80 recorded checks it has ranged between €628 and €1,305. Our sampling points to January 2027 as the cheapest month to fly Oslo to Osaka.
Prices are re-checked against Skyscanner automatically, and every one shows when it was last confirmed, so nothing here is older than it looks. Not flying from Oslo? We track 60 other departure cities for Osaka, listed at the foot of this page.
Prices like this tend to vanish fast. If it has gone when you look, try the days either side of the dates above, since Oslo to Osaka is often still worth booking within a day or two of the fare we found.