The cheapest round-trip from Cologne to Oslo is about 213 EUR, usually in September 2026; June 2026 is priciest, so booking the low month saves around 87 EUR (~29%). Typical fare ~234 EUR, from 151 priced fares. Flightmussy live data, updated 2026-06-05.
Cheap flights from Cologne (CGN) to Oslo (OSL/TRF). Free, no signup, no ads, no tracking. Compare every airline across 12 months of fares on one heatmap — including low-cost carriers Google Flights often deprioritises.
Cheapest round-trip seen: 213 EUR, usually around September 2026. Typical fare ~234 EUR. Across the year prices range roughly 213–300 EUR — about 29% cheaper in the low season than the peak (June 2026). Carriers on this route include Lufthansa, Austrian, Eurowings, Air Baltic.
Based on Flightmussy's live 12-month fare data; prices last updated 2026-06-05. Prices change constantly — search live for current fares.
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