Every Washington–Oslo fare we track, measured against the route's typical price whenever there is enough cached history to build one. Subscribe in any RSS reader for free single-route price alerts — no account, no email needed.https://flight.dealsen-ushttps://flight.deals/flights/washington-to-oslo/#2026-09-16-2026-09-20-SKhttps://flight.deals/flights/washington-to-oslo/#2026-09-16-2026-09-20-SKWAS → OSL round-trip on SAS, 2026-09-16 to 2026-09-20 (4 nights). Cached fare $644. Not enough cached history on this route yet to say what it usually costs.Wed, 05 Aug 2026 11:31:58 GMT