The cheapest round-trip from Oslo to Washington is about 445 EUR, usually in October 2026; July 2026 is priciest, so booking the low month saves around 156 EUR (~26%). Typical fare ~516 EUR, from 152 priced fares. Flightmussy live data, updated 2026-06-05.
Cheap flights from Oslo (OSL/TRF) to Washington (IAD/DCA/BWI). 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: 445 EUR, usually around October 2026. Typical fare ~516 EUR. Across the year prices range roughly 445–601 EUR — about 26% cheaper in the low season than the peak (July 2026).
Based on Flightmussy's live 12-month fare data; prices last updated 2026-06-05. Prices change constantly — search live for current fares.
Flightmussy is a free flight meta-search built by one person in Oslo. No signup, no ads, no tracking — email is optional, only for route price alerts. Compare fares across airlines and see 12 months of prices at a glance — including low-cost carriers Google Flights often deprioritises (Widerøe, Wizz Air, Norwegian, Ryanair). Pay with a card at the airline, or use the Crypto button on any result to check out in BTC, ETH, USDT, BNB or AVA via Travala.